CN112995492A - Parameter adjusting method and device, image acquisition system and computer readable storage medium - Google Patents
Parameter adjusting method and device, image acquisition system and computer readable storage medium Download PDFInfo
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- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- H—ELECTRICITY
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- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
- H04N23/671—Focus control based on electronic image sensor signals in combination with active ranging signals, e.g. using light or sound signals emitted toward objects
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Abstract
The embodiment of the invention relates to a parameter adjusting method, a parameter adjusting device, an image acquisition system and a computer readable storage medium. The parameter adjusting method enables a user to adjust an image acquisition area to be in an effective photographing range of a camera by only adjusting an image acquisition device such as a zoom ring of the camera, adjust a focusing ring to enable imaging to be clear to obtain a current focusing value, and determine a proper combination of screen-shooting brightness, exposure time, light sensitivity and aperture value according to a target exposure interval, a basic exposure relational expression, a plurality of exposure coefficient relational expressions, a target array of associated aperture values, the focusing value and exposure coefficients to achieve a proper exposure, so that parameter adjustment can be rapidly completed at one time, for example, and an acquired image has proper saturation.
Description
Technical Field
The present invention relates to the field of display correction technologies, and in particular, to a parameter adjusting method, a parameter adjusting apparatus, an image capturing system, and a computer-readable storage medium.
Background
When the LED display correction is carried out, proper image data needs to be collected firstly, and then the brightness and the chroma of the LED display are adjusted according to the image data. In general, the acquisition of image data may be performed using an image acquisition device, such as a camera, and the brightness of the image data may be described using saturation. If the image saturation is too low, the acquired image data is too dark and is easily affected by noise such as ambient light, and if the image saturation is too high, the acquired image data is overexposed and the data is not credible. The saturation is not appropriate to be too small or too large, and both indicate distortion of the image data at this time. The real image data can be ensured to be collected only by proper saturation, the foundation of the correction process can be laid according to the real image data, and finally a good correction effect can be obtained.
In the prior art, the camera parameters are mainly manually adjusted by an operator to improve the saturation of a captured image, so that the saturation is within a proper range. However, manual adjustment of camera parameters imposes high requirements on operators, the operators are required to have good camera adjustment experience and rich camera shooting knowledge, the error rate of manual adjustment is high and uncontrollable, and the adjustment time is slow and uncontrollable.
Disclosure of Invention
Therefore, to overcome at least some of the defects and shortcomings in the prior art, embodiments of the present invention provide a parameter adjusting method, a parameter adjusting apparatus, an image capturing system, and a computer readable storage medium, which can achieve fast determination of relevant parameters of an image capturing device so that the image saturation is within a proper range.
On one hand, a parameter adjusting method provided by the embodiment of the invention includes: i) acquiring a current focusing value of image acquisition equipment, wherein the image acquisition equipment is used for acquiring an image of a target display screen; ii) a distance acquisition step of acquiring a distance value between the image acquisition device and the target display screen; iii) acquiring screen brightness, namely acquiring target screen brightness of the target display screen; iv) determining a target value of the screen-printing brightness, a target value of the exposure time, a target value of the sensitivity and a target array of the aperture value according to a basic exposure relation which is associated with the target screen brightness and the distance value, a first exposure coefficient relation which is associated with the screen-printing brightness, a second exposure coefficient relation which is associated with the exposure time and a third exposure coefficient relation which is associated with the sensitivity, and by combining a value range of the screen-printing brightness, a value range of the exposure time, a value range of the sensitivity, a target exposure interval and an associated aperture value of the image acquisition device, a focus value and a target array of a fourth exposure coefficient; and v) a setting step of setting the exposure time, the sensitivity, and the aperture value of the image pickup apparatus based on the target value of the exposure time, the target value of the sensitivity, and the target value of the aperture value, and setting the screen-striking luminance of the target display screen based on the target value of the screen-striking luminance.
For the parameter adjustment method of this embodiment, a user may adjust an image acquisition device, for example, a zoom ring of a camera, to adjust an area to be image acquired to an effective photographing range of the camera, adjust a focus ring to make imaging clearer to obtain a current focus value, and then determine a suitable combination of screen brightness, exposure time, sensitivity, and aperture value according to the target exposure value interval, each exposure value relational expression, and a target array, so as to achieve a suitable exposure value, thereby quickly completing parameter adjustment, for example, at one time, and further enabling the acquired image to have a suitable saturation.
In one embodiment of the invention, the determining step comprises: iv-1) initializing the screen-printing brightness, the exposure time, the sensitivity and the aperture value to obtain an initial value of the screen-printing brightness, an initial value of the exposure time, an initial value of the sensitivity and an initial value of the aperture value; iv-2) searching the target array according to the current focus value and the initial value of the aperture value to obtain an initial value of a fourth exposure coefficient; iv-3) determining an initial value of exposure according to the target screen brightness, the distance value, the initial value of the screening brightness, the initial value of the exposure time, the initial value of the sensitivity, and the initial value of the fourth exposure coefficient; iv-4) when the exposure initial value is in the target exposure interval, taking the initial value of the screen brightness, the initial value of the exposure time, the initial value of the sensitivity and the initial value of the aperture value as the target value of the screen brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value respectively.
In one embodiment of the present invention, the determining step further comprises: iv-5) determining an exposure adjustment target value according to the target exposure interval; iv-6) when the exposure initial value exceeds the target exposure interval, determining a first parameter adjusting proportion according to the exposure adjusting target value and the exposure initial value, and multiplying the initial value of a first parameter by the first parameter adjusting proportion to obtain the current value of the first parameter; iv-7) when the current value of the first parameter is in the value range of the first parameter, determining the target value of the screen-printing brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value according to the current value of the first parameter, the initial value of the second parameter, the initial value of the third parameter and the initial value of the fourth parameter, wherein the first parameter, the second parameter, the third parameter and the fourth parameter are respectively different from each other in the screen-printing brightness, the exposure time, the sensitivity and the fourth exposure coefficient.
In one embodiment of the present invention, the determining step further comprises: iv-8) when the current value of the first parameter exceeds the value range of the first parameter, determining a second parameter adjustment proportion according to the exposure adjustment target value, the exposure initial value, a boundary value of the value range of the first parameter and the initial value of the first parameter, and multiplying the initial value of the second parameter by the second parameter adjustment proportion to obtain the current value of the second parameter; iv-9) when the current value of the second parameter is within the value range of the second parameter, determining the target value of the screen-striking brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value according to the boundary value of the first parameter, the current value of the second parameter, the initial value of the third parameter and the initial value of the fourth parameter.
In one embodiment of the present invention, the determining step further comprises: iv-10) when the current value of the second parameter exceeds the value range of the second parameter, determining a third parameter adjustment ratio according to the exposure adjustment target value, the exposure initial value, the boundary value of the first parameter, the initial value of the first parameter, one boundary value of the value range of the second parameter and the initial value of the second parameter, and multiplying the initial value of the third parameter by the third parameter adjustment ratio to obtain the current value of the third parameter; iv-11) when the current value of the third parameter is within the value range of the third parameter, determining the target value of the screen-striking brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value according to the boundary value of the first parameter, the boundary value of the second parameter, the current value of the third parameter and the initial value of the fourth parameter.
In one embodiment of the present invention, the determining step further comprises: iv-12) when the current value of the third parameter exceeds the value range of the third parameter, determining a fourth parameter adjustment ratio according to the exposure adjustment target value, the exposure initial value, the boundary value of the first parameter, the initial value of the first parameter, the boundary value of the second parameter, the initial value of the second parameter, one boundary value of the value range of the third parameter and the initial value of the third parameter, and multiplying the initial value of the fourth parameter by the fourth parameter adjustment ratio to obtain the current value of the fourth parameter; iv-13) determining the target value of the screen-striking brightness, the target value of the exposure time, the target value of the sensitivity, and the target value of the aperture value, based on the boundary value of the first parameter, the boundary value of the second parameter, the boundary value of the third parameter, and the current value of the fourth parameter.
In another aspect, a parameter adjusting apparatus provided in an embodiment of the present invention is adapted to perform the parameter adjusting method described in any of the foregoing embodiments, and includes: the system comprises a focus value acquisition module, a focus value acquisition module and a focus value acquisition module, wherein the focus value acquisition module is used for acquiring the current focus value of an image acquisition device, and the image acquisition device is used for acquiring an image of a target display screen; the distance acquisition module is used for acquiring a distance value between the image acquisition equipment and the target display screen; the screen brightness acquisition module is used for acquiring the target screen brightness of the target display screen; a determining module, configured to determine, according to a basic exposure amount relational expression associating the target screen body brightness and the distance value, a first exposure amount coefficient relational expression associating the screen-printing brightness, a second exposure amount coefficient relational expression associating the exposure time, and a third exposure amount coefficient relational expression associating the sensitivity, and in combination with a value range of the screen-printing brightness, a value range of the exposure time, a value range of the sensitivity, a target exposure amount interval and an associated aperture value of the image acquisition device, and a target array of a focus value and a fourth coefficient exposure amount, a target value of the screen-printing brightness, a target value of the exposure time, a target value of the sensitivity, and a target value of the aperture value; and a setting module for setting the exposure time, the sensitivity and the aperture value of the image acquisition device based on the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value, and setting the screen-printing brightness of the target display screen based on the target value of the screen-printing brightness.
In still another aspect, an embodiment of the present invention provides a computer-readable storage medium, which is a non-volatile memory and stores program code, and when the program code is executed by a computer, the computer implements the parameter adjustment method according to any one of the foregoing embodiments.
In another aspect, an embodiment of the present invention provides an image capturing system, including: the LED display screen is provided with a display control system; an image acquisition device; and the upper computer is electrically connected with the image acquisition equipment and the display control system of the LED display screen. The upper computer is used for executing the parameter adjusting method of any embodiment to set exposure time, sensitivity and aperture value of the image acquisition equipment and screen-shooting brightness of the LED display screen, controlling the image acquisition equipment to acquire an image of the LED display screen displaying the image with the set screen-shooting brightness, and taking the LED display screen as the target display screen.
In one embodiment of the present invention, the image acquisition system further comprises: the distance measuring equipment is electrically connected with the upper computer and is used for measuring the distance value between the image acquisition equipment and the LED display screen; and the screen brightness measuring equipment is electrically connected with the upper computer and used for measuring the target screen brightness of the LED display screen.
As can be seen from the above, the above technical features of the present invention may have one or more of the following advantages: based on the parameter adjusting method, the parameter adjusting device, the computer-readable storage medium and the image acquisition system of the foregoing embodiments, a user may adjust an image acquisition device, such as a zoom ring of a camera, to adjust an image acquisition region to be within an effective photographing range of the camera, adjust a focus ring to make an image clearer to obtain a current focus value, and then determine a suitable combination of screen-shooting brightness, exposure time, light sensitivity and aperture value according to a target exposure value interval, a basic exposure value relational expression, a plurality of exposure value coefficient relational expressions and a target array to achieve a suitable exposure value, so that parameter adjustment can be rapidly completed, for example, at one time, and thus an acquired image has a suitable saturation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart illustrating a parameter adjusting method according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an image acquisition system suitable for the parameter adjustment method shown in fig. 1.
Fig. 3 is a schematic structural diagram of an image capturing system according to another embodiment of the present invention.
Fig. 4 is a block diagram of a parameter adjusting apparatus according to a second embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a parameter adjustment system according to a third embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a computer-readable storage medium according to a fourth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
[ first embodiment ] A method for manufacturing a semiconductor device
As shown in fig. 1, a parameter adjusting method according to a first embodiment of the present invention includes:
a focus value obtaining step S11, obtaining a current focus value of an image acquisition device, wherein the image acquisition device is used for carrying out image acquisition on a target display screen;
a distance obtaining step S13 of obtaining a distance value between the image capture device and the target display screen;
a screen brightness obtaining step S15, obtaining a target screen brightness of the target display screen;
determining step S17, determining a target value of the screen-printing brightness, a target value of the exposure time, a target value of the sensitivity, and a target array of the aperture value according to a basic exposure relation associating the target screen brightness with the distance value, a first exposure coefficient relation associating the screen-printing brightness, a second exposure coefficient relation associating the exposure time, and a third exposure coefficient relation associating the sensitivity, and by combining a value range of the screen-printing brightness, a value range of the exposure time, a value range of the sensitivity, a target exposure interval and an associated aperture value of the image capturing apparatus, a focus value, and a target array of a fourth exposure coefficient;
a setting step S19 of setting the exposure time, the sensitivity, and the aperture value of the image pickup apparatus based on the target value of the exposure time, the target value of the sensitivity, and the target value of the aperture value, and setting the screen-striking luminance of the target display screen based on the target value of the screen-striking luminance.
In a specific implementation manner, the determining step S11 of this embodiment includes, for example:
(I) initializing the screen-printing brightness, the exposure time, the sensitivity and the aperture value to obtain an initial value of the screen-printing brightness, an initial value of the exposure time, an initial value of the sensitivity and an initial value of the aperture value;
(II) searching the target array according to the current focus value and the initial value of the aperture value to obtain an initial value of a fourth exposure coefficient;
(III) determining an initial value of exposure based on the target screen brightness, the distance value, the initial value of the screening brightness, the initial value of the exposure time, the initial value of the sensitivity, and the initial value of the fourth exposure coefficient;
(IV) when the exposure initial value is in the target exposure interval, taking the initial value of the screen-shooting brightness, the initial value of the exposure time, the initial value of the sensitivity and the initial value of the aperture value as the target value of the screen-shooting brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value respectively.
In the embodiment, the initial value of the exposure amount is determined by initializing the screen-shooting brightness, the exposure time, the sensitivity and the aperture value and combining the current focus value, and whether the initial value of the exposure amount is in the target exposure amount interval is judged, so that the initial calculation of the exposure amount can be realized.
Optionally, as an embodiment of the present invention, the determining step further includes:
(V) determining an exposure adjustment target value from the target exposure interval;
(VI) when the exposure initial value exceeds the target exposure interval, determining a first parameter adjusting proportion according to the exposure adjusting target value and the exposure initial value, and multiplying the initial value of a first parameter by the first parameter adjusting proportion to obtain the current value of the first parameter;
(VII) when the current value of the first parameter is in the value range of the first parameter, determining the target value of the screen-printing brightness, the target value of the exposure time, the target value of the sensitivity, and the target value of the aperture value according to the current value of the first parameter, the initial value of the second parameter, the initial value of the third parameter, and the initial value of the fourth parameter, where the first parameter, the second parameter, the third parameter, and the fourth parameter are different from each other in the screen-printing brightness, the exposure time, the sensitivity, and the fourth exposure coefficient, respectively.
In this embodiment, when the exposure amount obtained by the first calculation is not in the target exposure amount interval, one of four parameters, such as the screen-capturing brightness, the exposure time, the sensitivity, and the fourth exposure amount coefficient, is selected as the first parameter, and the exposure amount is calculated again to determine whether the exposure amount can reach a proper value by adjusting the first parameter.
Optionally, as an embodiment of the present invention, the determining step further includes:
(VIII) when the current value of the first parameter exceeds the value range of the first parameter, determining a second parameter adjustment proportion according to the exposure adjustment target value, the exposure initial value, a boundary value of the value range of the first parameter and the initial value of the first parameter, and multiplying the initial value of the second parameter by the second parameter adjustment proportion to obtain the current value of the second parameter;
(IX) when the current value of the second parameter is within the value range of the second parameter, determining the target value of the screen-striking brightness, the target value of the exposure time, the target value of the sensitivity, and the target value of the aperture value according to the boundary value of the first parameter, the current value of the second parameter, the initial value of the third parameter, and the initial value of the fourth parameter.
In this embodiment, when the recalculated exposure amount is not in the target exposure amount interval, another parameter of four parameters, such as the screen brightness, the exposure time, the sensitivity, and the fourth exposure amount coefficient, is selected as the second parameter, and the exposure amount is calculated for the third time to determine whether the exposure amount can reach a proper value by adjusting the second parameter.
Optionally, as an embodiment of the present invention, the determining step further includes:
(X) when the current value of the second parameter exceeds the value range of the second parameter, determining a third parameter adjustment ratio according to the exposure adjustment target value, the exposure initial value, the boundary value of the first parameter, the initial value of the first parameter, one boundary value of the value range of the second parameter and the initial value of the second parameter, and multiplying the initial value of the third parameter by the third parameter adjustment ratio to obtain the current value of the third parameter;
(XI) when the current value of the third parameter is within the value range of the third parameter, determining the target value of the screen-striking brightness, the target value of the exposure time, the target value of the sensitivity, and the target value of the aperture value according to the boundary value of the first parameter, the boundary value of the second parameter, the current value of the third parameter, and the initial value of the fourth parameter.
In this embodiment, when the exposure amount obtained by the third calculation is not in the target exposure amount interval, another parameter of four parameters, such as the screen-printing brightness, the exposure time, the sensitivity, and the fourth exposure amount coefficient, is selected as the third parameter, and the exposure amount is calculated for the fourth time, so as to determine whether the exposure amount can reach a proper value by adjusting the third parameter.
Optionally, as an embodiment of the present invention, the determining step further includes:
(XII) when the current value of the third parameter exceeds the value range of the third parameter, determining a fourth parameter adjustment ratio according to the exposure adjustment target value, the exposure initial value, the boundary value of the first parameter, the initial value of the first parameter, the boundary value of the second parameter, the initial value of the second parameter, a boundary value of the value range of the third parameter, and the initial value of the third parameter, and multiplying the initial value of the fourth parameter by the fourth parameter adjustment ratio to obtain the current value of the fourth parameter;
(XIII) determining the target value of the screen-striking luminance, the target value of the exposure time, the target value of the sensitivity, and the target value of the aperture value from the boundary value of the first parameter, the boundary value of the second parameter, the boundary value of the third parameter, and the current value of the fourth parameter.
In this embodiment, when the exposure amount obtained by the fourth calculation is not in the target exposure amount interval, another parameter of four parameters, such as the screen brightness, the exposure time, the sensitivity, and the fourth exposure coefficient, is selected as the fourth parameter, and the exposure amount is calculated for the fifth time, so that the exposure amount finally reaches an appropriate value by adjusting the fourth parameter.
In order to understand the present embodiment more clearly, the parameter adjusting method of the present embodiment will be exemplified below with reference to fig. 1 and 2 to describe it in detail.
Referring to fig. 2, it is an image capturing system 20 to which the parameter adjusting method of the present embodiment is applied, and the image capturing system includes: the system comprises a target display screen 21, an image acquisition device 23, an upper computer 25, a distance measurement device 27 and a screen brightness measurement device 29. The target display screen 21 of this embodiment is, for example, an LED display screen provided with a display control system, where the display control system includes, for example, a system controller (e.g., a sending card) and a module control card (e.g., a receiving card or a scanning card), and the LED display screen includes, for example, one or more LED modules, and each LED module includes one or more LED lamp panels with LED lamp spots as display pixels, which are carried by the module control card. The image acquisition device 23 is used for image acquisition of the target display screen 21 and is, for example, a camera, the distance measurement device 27 is used for measuring a distance value D between the image acquisition device 23 and the target display screen 21 and is, for example, an infrared distance meter, and the screen brightness measurement device 29 is used for measuring the brightness of an area to be image-acquired of the target display screen 21, such as the maximum brightness X, and is, for example, a brightness meter; the upper computer 25 is electrically connected to the image acquisition device 23, the distance measurement device 27, the screen brightness measurement device 29, and the display control system of the target display screen 21, and is provided with parameter adjustment software, such as saturation calculation software, for example, to execute the parameter adjustment method of the present embodiment.
In the light of the above, the saturation range maps the exposure amount of the image pickup device 23, and the following description is expressed in terms of the exposure amount. First, with respect to the performance of the employed image capturing apparatus 23, the relationship of the aperture value AV, the focus value E, and the exposure amount coefficient Axx (fourth exposure amount coefficient) may be established by actual measurement to obtain a target array associating the aperture value, the focus value, and the fourth exposure amount coefficient, for example { (AV1, E1, a11), (AV1, E2, a12), (AV1, E3, a13), … …; (AV2, E1, a21), (AV2, E2, a22), (AV2, E3, a23), … …; (AV3, E1, a31), (AV3, E2, a32), (AV3, E3, a33), … …; … …, wherein the aperture value AV is AV1, AV2, AV3, … … in order from large to small. And then, establishing a basic exposure relational expression according to the measured screen brightness X and the measured distance value D: a ═ X × K0 ═ 1/D2(ii) a Establishing a first exposure coefficient relation according to the screening brightness L: a1 ═ K1 ═ L, where L ranges, for example, [ 10%, 100%]I.e. the ratio with respect to the screen brightness X; establishing a second exposure coefficient relation according to the exposure time T: a2 ═ K2 × T, where T is, for example, [0.1 second, 3 seconds ═ T](ii) a Establishing a third exposure coefficient relation according to the sensitivity ISO: a3 ═ K3 × ISO, where the sensitivity ISO ranges, for example, [100, 400 ═ ISO]. In this embodiment, K1, K2, and K3 are constants, and the value ranges are only illustrative examples and are not intended to limit the present invention.
Furthermore, a suitable target exposure interval [ C1, C2] may be determined depending on the specific model of the image capturing device 23, such as a camera]And is provided to the software running on the upper computer 25, the software running on the upper computer 25 can determine that the exposure adjustment target value is Cm ═ C1+ C2)/2,and calculating the initial value of exposure amount C (A) A1 (A2) A3 (AXX) K0 (1/D)2*K1*L*K2*T*K3*ISO*Axx＝(X*K0*1/D2K1 × K2 × K3 (L × T ISO × Axx); wherein X K0X 1/D2K1K 2K 3 is a known quantity for a certain exposure adjustment, and the focus value E used in Axx is also a known quantity.
The software performs the following calculation procedure, for example, with the goal of determining a suitable set of L, T, ISO, AV:
(a) if L, T, ISO, and AV are initialized, for example, L1 is 50%, T1 is 0.3 seconds, ISO1 is 100, AV is AV1, and E is actually E1, the target array is searched to obtain an initial value of the fourth exposure coefficient, which is a 11. Calculating an exposure initial value C and comparing the exposure initial value C with a target exposure interval [ C1, C2 ]; if C is in the interval of [ C1, C2], ending the adjustment, in this case the target value of the screen-printing brightness L, the target value of the exposure time T, the target value of the sensitivity ISO and the target value of the aperture value AV are L1, T1, ISO1 and AV1 respectively; if C is not in the interval of [ C1, C2], the next step is carried out.
(b) Calculating the ratio of Cm/C (first parameter adjustment ratio), and changing L according to the ratio of Cm/C; if the changed L is in the value range of L, finishing the adjustment, wherein the target value of the screen printing brightness L, the target value of the exposure time T, the target value of the sensitivity ISO and the target value of the aperture value AV are respectively L1 Cm/C, T1, ISO1 and AV 1; if the L exceeds the value range of the L after the change, the L is not adjusted to the limit, the limit L is a boundary value of the value range of the L and is recorded as Lbj, and the next step is carried out;
(c) calculating the proportion of Cm/[ C (Lbj/L1) ] (second parameter adjustment proportion), changing T according to the proportion of Cm/[ C (Lbj/L1) ], and finishing adjustment if the changed T is within the value range of T, wherein the target value of the screen-printing brightness L, the target value of the exposure time T, the target value of the sensitivity ISO and the target value of the aperture value AV are respectively Lbj, T1 Cm/[ C (Lbj/L1) ], ISO1 and AV 1; if the changed T exceeds the value range of T, the T is not adjusted to the limit and the limit T is a boundary value of the value range of T and is recorded as Tbj, and the next step is carried out;
(d) calculating the ratio of Cm/[ C (Lbj/L1) (Tbj/T1) ] (third parameter adjustment ratio), changing the ISO by the ratio of Cm/[ C (Lbj/L1) (Tbj/T1) ], and if the changed ISO is within the range of the ISO value, ending the adjustment, wherein the target value of the screen brightness L, the target value of the exposure time T, the target value of the sensitivity ISO, and the target value of the aperture value AV are Lbj, Tbj, ISO1 × Cm/[ C (Lbj/L1) (Tbj/T1) ], and AV1, respectively; if the changed ISO exceeds the value range of ISO, the ISO indicates that the ISO is not adjusted to the limit, the limit ISO is a boundary value of the value range of ISO and is marked as ISObj, and the next step is carried out;
(e) and calculating the proportion of Cm/[ C (Lbj/L1) (Tbj/T1) (ISObj/ISO1) ] (fourth parameter adjustment proportion), changing Axx according to the proportion of Cm/[ C (Lbj/L1) (Tbj/T1) (ISObj/ISO1) ], obtaining the closest Axx, marking As, and searching the target array by using As and the current focusing value E1 to obtain the target value of the aperture AV.
Through the calculation process, a group of proper L, T, ISO and AV can be determined; then, software running on the upper computer 25 can set the exposure time, the sensitivity and the aperture value of the image capturing device 23 and set the screen-printing brightness of the target display screen 21 according to the finally determined L, T, ISO and AV, and control the image capturing device 23 to capture an image of the target display screen 21 on which the image is displayed at the set screen-printing brightness. It should be noted that the foregoing examples sequentially perform parameter adjustment according to the order of the screen-printing brightness L, the exposure time T, the sensitivity ISO and the fourth exposure coefficient Axx, but the embodiment of the present invention is not limited thereto, and the adjustment order of the four parameters (L, T, ISO, Axx) may be arbitrarily combined, but in a preferred embodiment, it is recommended that the sensitivity ISO adjustment is performed after the adjustment of the screen-printing brightness L and the exposure time T.
As can be seen from the above, based on the parameter adjusting method and the image capturing system 20 of this embodiment, a user may only need to adjust the image capturing device 23, for example, a zoom ring of a camera, to adjust an area to be captured of an image to be captured within an effective photographing range of the camera, adjust a focus ring to make an image to be clearly imaged to obtain a current focus value, and then determine a suitable combination of screen-shooting brightness, exposure time, light sensitivity, and aperture value according to a target exposure value interval, a basic exposure value relational expression, a plurality of exposure value coefficient relational expressions, and a target array to achieve a suitable exposure value, so that parameter adjustment may be rapidly completed, for example, at one time, and further the captured image has a suitable saturation.
In addition, in other specific embodiments, as shown in fig. 3, the upper computer 25 may not be connected to the distance measuring device 27 and the screen brightness measuring device 29, so that the distance value D and the target screen brightness X required by the software running on the upper computer 25 may be manually input, and the exposure amount may also be rapidly adjusted to make the acquired image have a proper saturation.
[ second embodiment ]
As shown in fig. 4, a parameter adjusting apparatus 40 according to a second embodiment of the present invention includes: a focusing value acquisition module 41, a distance acquisition module 43, a screen brightness acquisition module 45, a determination module 47 and a setting module 49.
The focus value obtaining module 41 is configured to obtain a current focus value of an image capturing device, for example, where the image capturing device is configured to capture an image of a target display screen. The distance obtaining module 43 is used for obtaining a distance value between the image capturing device and the target display screen, for example. The screen brightness obtaining module 45 is, for example, configured to obtain a target screen brightness of the target display screen. The determining module 47 is configured to determine the target value of the screen-printing brightness, the target value of the exposure time, the target value of the sensitivity, and the target value of the aperture value according to a basic exposure relation associated with the target screen brightness and the distance value, a first exposure coefficient relation associated with the screen-printing brightness, a second exposure coefficient relation associated with the exposure time, and a third exposure coefficient relation associated with the sensitivity, and by combining a value range of the screen-printing brightness, a value range of the exposure time, a value range of the sensitivity, a target exposure interval and an associated aperture value of the image capturing device, a focus value, and a target array of a fourth exposure coefficient. The setting module 49 is configured to set the exposure time, the sensitivity, and the aperture value of the image capturing apparatus based on the target value of the exposure time, the target value of the sensitivity, and the target value of the aperture value, and set the screen-printing luminance of the target display screen based on the target value of the screen-printing luminance, for example.
Optionally, as an embodiment of the present invention, the determining module is specifically configured to:
initializing the screen-printing brightness, the exposure time, the sensitivity and the aperture value to obtain an initial value of the screen-printing brightness, an initial value of the exposure time, an initial value of the sensitivity and an initial value of the aperture value;
searching the target array according to the current focusing value and the initial value of the aperture value to obtain an initial value of a fourth exposure coefficient;
determining an exposure initial value according to the target screen brightness, the distance value, the initial value of the screening brightness, the initial value of the exposure time, the initial value of the sensitivity and the initial value of the fourth exposure coefficient;
when the exposure value initial value is in the target exposure value interval, taking the initial value of the screen-shooting brightness, the initial value of the exposure time, the initial value of the sensitivity and the initial value of the aperture value as the target value of the screen-shooting brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value respectively.
Optionally, as an embodiment of the present invention, the determining module is further specifically configured to:
determining an exposure regulation target value according to the target exposure interval;
when the exposure value initial value exceeds the target exposure value interval, determining a first parameter adjusting proportion according to the exposure value adjusting target value and the exposure value initial value, and multiplying the initial value of a first parameter by the first parameter adjusting proportion to obtain the current value of the first parameter;
when the current value of the first parameter is in the value range of the first parameter, determining the target value of the screen-printing brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value according to the current value of the first parameter, the initial value of the second parameter, the initial value of the third parameter and the initial value of the fourth parameter, wherein the first parameter, the second parameter, the third parameter and the fourth parameter are respectively different from one another in the screen-printing brightness, the exposure time, the sensitivity and the exposure coefficient of the fourth parameter.
Optionally, as an embodiment of the present invention, the determining module is further specifically configured to:
when the current value of the first parameter exceeds the value range of the first parameter, determining a second parameter adjustment proportion according to the exposure adjustment target value, the exposure initial value, a boundary value of the value range of the first parameter and the initial value of the first parameter, and multiplying the initial value of the second parameter by the second parameter adjustment proportion to obtain the current value of the second parameter;
when the current value of the second parameter is within the value range of the second parameter, determining the target value of the screen-printing brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value according to the boundary value of the first parameter, the current value of the second parameter, the initial value of the third parameter and the initial value of the fourth parameter.
Optionally, as an embodiment of the present invention, the determining module is further specifically configured to:
when the current value of the second parameter exceeds the value range of the second parameter, determining a third parameter adjustment ratio according to the exposure adjustment target value, the exposure initial value, the boundary value of the first parameter, the initial value of the first parameter, one boundary value of the value range of the second parameter and the initial value of the second parameter, and multiplying the initial value of the third parameter by the third parameter adjustment ratio to obtain the current value of the third parameter;
when the current value of the third parameter is within the value range of the third parameter, determining the target value of the screen-striking brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value according to the boundary value of the first parameter, the boundary value of the second parameter, the current value of the third parameter and the initial value of the fourth parameter.
Optionally, as an embodiment of the present invention, the determining module is further specifically configured to:
when the current value of the third parameter exceeds the value range of the third parameter, determining a fourth parameter adjustment proportion according to the exposure adjustment target value, the exposure initial value, the boundary value of the first parameter, the initial value of the first parameter, the boundary value of the second parameter, the initial value of the second parameter, one boundary value of the value range of the third parameter and the initial value of the third parameter, and multiplying the initial value of the fourth parameter by the fourth parameter adjustment proportion to obtain the current value of the fourth parameter;
determining the target value of the screen-printing brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value according to the boundary value of the first parameter, the boundary value of the second parameter, the boundary value of the third parameter and the current value of the fourth parameter.
For the specific functional details of the focus value obtaining module 41, the distance obtaining module 43, the screen brightness obtaining module 45, the determining module 47 and the setting module 49, reference may be made to the detailed description in the foregoing first embodiment, and no further description is given here. Further, it is noted that the focus value acquiring module 41, the distance acquiring module 43, the screen brightness acquiring module 45, the determining module 47 and the setting module 49 may be software modules, stored in a non-volatile memory and executed by a processor to perform the operations of steps S11, S13, S15, S17 and S19 in the first embodiment.
[ third embodiment ]
As shown in fig. 5, a parameter adjusting system 50 according to a third embodiment of the present invention includes: a processor 51 and a memory 53; the memory 53 stores instructions executed by the processor 51, and the instructions cause the processor 51 to perform operations to perform the parameter adjustment method described in the foregoing first embodiment, for example.
[ fourth example ] A
As shown in fig. 6, a computer-readable storage medium 60, which is a non-volatile memory and stores program code, when the program code is executed by one or more processors, for example, the one or more processors are caused to execute the parameter adjusting method according to the first embodiment.
In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present invention, and technical solutions of the embodiments can be arbitrarily combined and used without conflict between technical features and structures, and without departing from the purpose of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and/or method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units/modules is only one logical division, and there may be other divisions in actual implementation, for example, multiple units or modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units/modules described as separate parts may or may not be physically separate, and parts displayed as units/modules may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units/modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, each functional unit/module in the embodiments of the present invention may be integrated into one processing unit/module, or each unit/module may exist alone physically, or two or more units/modules may be integrated into one unit/module. The integrated units/modules may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units/modules.
The integrated units/modules, which are implemented in the form of software functional units/modules, may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing one or more processors of a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for parameter adjustment, comprising:
acquiring a current focusing value of image acquisition equipment, wherein the image acquisition equipment is used for acquiring an image of a target display screen;
a distance obtaining step of obtaining a distance value between the image acquisition device and the target display screen;
acquiring screen brightness, namely acquiring target screen brightness of the target display screen;
determining a target value of the screen-printing brightness, a target value of the exposure time, a target value of the exposure sensitivity and a target array of the aperture value according to a basic exposure relation related to the target screen brightness and the distance value, a first exposure coefficient relation related to the screen-printing brightness, a second exposure coefficient relation related to the exposure time and a third exposure coefficient relation related to the sensitivity, and by combining a value range of the screen-printing brightness, a value range of the exposure time, a value range of the sensitivity, a target exposure interval of the image acquisition equipment, a related aperture value, a focusing value and a fourth exposure coefficient; and
a setting step of setting the exposure time, the sensitivity, and the aperture value of the image pickup apparatus based on the target value of the exposure time, the target value of the sensitivity, and the target value of the aperture value, and setting the screen-striking luminance of the target display screen based on the target value of the screen-striking luminance.
2. The parameter adjustment method of claim 1, wherein the determining step comprises:
initializing the screen-printing brightness, the exposure time, the sensitivity and the aperture value to obtain an initial value of the screen-printing brightness, an initial value of the exposure time, an initial value of the sensitivity and an initial value of the aperture value;
searching the target array according to the current focusing value and the initial value of the aperture value to obtain an initial value of a fourth exposure coefficient;
determining an exposure initial value according to the target screen brightness, the distance value, the initial value of the screening brightness, the initial value of the exposure time, the initial value of the sensitivity and the initial value of the fourth exposure coefficient;
when the exposure value initial value is in the target exposure value interval, taking the initial value of the screen-shooting brightness, the initial value of the exposure time, the initial value of the sensitivity and the initial value of the aperture value as the target value of the screen-shooting brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value respectively.
3. The parameter adjustment method of claim 2, wherein the determining step further comprises:
determining an exposure regulation target value according to the target exposure interval;
when the exposure value initial value exceeds the target exposure value interval, determining a first parameter adjusting proportion according to the exposure value adjusting target value and the exposure value initial value, and multiplying the initial value of a first parameter by the first parameter adjusting proportion to obtain the current value of the first parameter;
when the current value of the first parameter is in the value range of the first parameter, determining the target value of the screen-printing brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value according to the current value of the first parameter, the initial value of the second parameter, the initial value of the third parameter and the initial value of the fourth parameter, wherein the first parameter, the second parameter, the third parameter and the fourth parameter are respectively different from one another in the screen-printing brightness, the exposure time, the sensitivity and the exposure coefficient of the fourth parameter.
4. The parameter adjustment method of claim 3, wherein the determining step further comprises:
when the current value of the first parameter exceeds the value range of the first parameter, determining a second parameter adjustment proportion according to the exposure adjustment target value, the exposure initial value, a boundary value of the value range of the first parameter and the initial value of the first parameter, and multiplying the initial value of the second parameter by the second parameter adjustment proportion to obtain the current value of the second parameter;
when the current value of the second parameter is within the value range of the second parameter, determining the target value of the screen-printing brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value according to the boundary value of the first parameter, the current value of the second parameter, the initial value of the third parameter and the initial value of the fourth parameter.
5. The parameter adjustment method of claim 4, wherein the determining step further comprises:
when the current value of the second parameter exceeds the value range of the second parameter, determining a third parameter adjustment ratio according to the exposure adjustment target value, the exposure initial value, the boundary value of the first parameter, the initial value of the first parameter, one boundary value of the value range of the second parameter and the initial value of the second parameter, and multiplying the initial value of the third parameter by the third parameter adjustment ratio to obtain the current value of the third parameter;
when the current value of the third parameter is within the value range of the third parameter, determining the target value of the screen-striking brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value according to the boundary value of the first parameter, the boundary value of the second parameter, the current value of the third parameter and the initial value of the fourth parameter.
6. The parameter adjustment method of claim 5, wherein the determining step further comprises:
when the current value of the third parameter exceeds the value range of the third parameter, determining a fourth parameter adjustment proportion according to the exposure adjustment target value, the exposure initial value, the boundary value of the first parameter, the initial value of the first parameter, the boundary value of the second parameter, the initial value of the second parameter, one boundary value of the value range of the third parameter and the initial value of the third parameter, and multiplying the initial value of the fourth parameter by the fourth parameter adjustment proportion to obtain the current value of the fourth parameter;
determining the target value of the screen-printing brightness, the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value according to the boundary value of the first parameter, the boundary value of the second parameter, the boundary value of the third parameter and the current value of the fourth parameter.
7. A parameter adjustment apparatus, adapted to perform the parameter adjustment method of any one of claims 1 to 6, and comprising:
the system comprises a focus value acquisition module, a focus value acquisition module and a focus value acquisition module, wherein the focus value acquisition module is used for acquiring the current focus value of an image acquisition device, and the image acquisition device is used for acquiring an image of a target display screen;
the distance acquisition module is used for acquiring a distance value between the image acquisition equipment and the target display screen;
the screen brightness acquisition module is used for acquiring the target screen brightness of the target display screen;
a determining module, configured to determine, according to a basic exposure amount relational expression associating the target screen body brightness and the distance value, a first exposure amount coefficient relational expression associating the screen-printing brightness, a second exposure amount coefficient relational expression associating the exposure time, and a third exposure amount coefficient relational expression associating the sensitivity, and in combination with a value range of the screen-printing brightness, a value range of the exposure time, a value range of the sensitivity, a target exposure amount interval and an associated aperture value of the image acquisition device, and a target array of a focus value and a fourth coefficient exposure amount, a target value of the screen-printing brightness, a target value of the exposure time, a target value of the sensitivity, and a target value of the aperture value; and
and the setting module is used for setting the exposure time, the sensitivity and the aperture value of the image acquisition equipment based on the target value of the exposure time, the target value of the sensitivity and the target value of the aperture value, and setting the screen-printing brightness of the target display screen based on the target value of the screen-printing brightness.
8. A computer-readable storage medium, characterized in that the computer-readable storage medium is a non-volatile memory and stores program code, which when executed by a computer implements the parameter adjustment method according to any one of claims 1 to 6.
9. An image acquisition system, comprising:
the LED display screen is provided with a display control system;
an image acquisition device;
the upper computer is electrically connected with the image acquisition equipment and the display control system of the LED display screen;
the upper computer is used for executing the parameter adjusting method according to any one of claims 1 to 6 to set the exposure time, the sensitivity and the aperture value of the image capturing device and the screen-shooting brightness of the LED display screen, and controlling the image capturing device to capture an image of the LED display screen displaying the image at the set screen-shooting brightness, and the LED display screen is used as the target display screen.
10. The image acquisition system of claim 9, further comprising:
the distance measuring equipment is electrically connected with the upper computer and is used for measuring the distance value between the image acquisition equipment and the LED display screen; and
and the screen brightness measuring equipment is electrically connected with the upper computer and is used for measuring the target screen brightness of the LED display screen.
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