CN112019833B - Digital image capturing device and color difference correction method and device of screen - Google Patents

Abstract

The invention provides a digital imaging device and a chromatic aberration correction method and device for a screen, wherein the method includes: providing a digital imaging device to be calibrated and a display screen to be calibrated; providing a wavelength-adjustable single-wavelength standard spectral light source; image acquisition; generate image acquisition chromaticity correction parameters; complete digital imaging device calibration; input standard grayscale signals; perform pre-correction screen acquisition; generate screen chromaticity correction parameters; In addition, the standard image display screen device has a built-in color characteristic configuration file to record the system calibration parameters generated by the above method. In addition, the standard digital image capturing device contains the image capturing chromaticity correction parameters generated by the above method. With the implementation of the present invention, the full-process chromatic aberration correction from the digital imaging device and the screen can be quickly and effectively completed.

Description

Digital imaging device and chromatic aberration correction method and device for screen

technical field

The present invention relates to the technical field of image processing, and in particular, to a digital imaging device and a chromatic aberration correction method and device for a screen.

Background technique

The oral cavity includes teeth, lips, tongue and other parts, and is the first stop for the human body to digest food; the main organs in the oral cavity are teeth, tongue, mucous membrane and salivary glands, etc. The exposed part of the teeth is the crown, while the root is not exposed. part. Teeth can be divided into three parts from the inside out: enamel, dentin and pulp.

When the dentist finds that the teeth are damaged and must be replaced, the dentures or dentures must be used at this time to replace the damaged teeth; the production of dentures must first be modeled and matched by the dentist, and then submitted to the For the dental laboratory, it includes: 1. Substrate fabrication → 2. Digital scanning → 3. Digital design → 4. Design completion → 5. Digital precision machining → 6. Zirconia post-processing → 7. High temperature sintering → 8. Interior Crown Adjustment→9. Upper Bonding Agent→10. Crown Porcelain→11. Porcelain Furnace Sintering→12. Shape Adjustment...etc.

When manufacturing dentures, because the color of dentures is related to the consistency or coordination with other teeth, it has a very critical impact on the overall aesthetics of the oral cavity. The consistent information of the color of dentures will depend on the imaging device and screen used by the dentist; however, if the imaging device and screen without chromatic aberration correction are used, the tooth color information will be more accurate due to equipment errors. inconsistent.

SUMMARY OF THE INVENTION

The present invention provides a digital imaging device and a chromatic aberration correction method and device for a screen, which are mainly to solve the problem of chromatic aberration correction in the whole process from the digital imaging device to the screen in the process of tooth restoration, and to complete the digital imaging device. The problem of chromatic aberration correction occurs.

The present invention provides a digital imaging device and a chromatic aberration correction method for a screen, which include: providing a digital imaging device to be calibrated and a display screen to be calibrated; providing a wavelength-adjustable single-wavelength standard spectral light source, which is time-divisional Provide single-wavelength standard light sources of each single wavelength; perform standard imaging, which is to use the digital imaging device to be calibrated to acquire images of the single-wavelength standard light sources in time sequence to generate grayscale values for each pixel of each single-wavelength image. Then, calculate the image chromaticity value corresponding to each single-wavelength picture; generate the image-taking chromaticity correction parameter, which is to perform a difference statistical operation between the image-taking chromaticity value of each single-wavelength picture and the standard spectrum corresponding to the single wavelength, To generate each single-wavelength imaging chromaticity correction parameter; complete the digital imaging device calibration, which is to calibrate the digital imaging device to be calibrated with each single-wavelength imaging chromaticity correction parameter to generate a standard digital imaging device; Input the standard grayscale signal, which is to input the R(0-255)/G(0-255)/B(0-255) standard grayscale signal into the display screen to be calibrated to generate the display screen before calibration; Screen image capturing, which uses a standard digital image capturing device to capture images of the display screen before correction, to generate the screen grayscale value before correction, and then calculate the corresponding screen chromaticity value before correction; generate screen chromaticity Calibration parameter, which is to calculate the standard grayscale signal after chromaticity conversion and the screen chromaticity value before calibration to generate screen chromaticity correction parameters; and complete the screen calibration, which is to take the image chromaticity correction parameter And the screen chromaticity calibration parameters are synthesized into system calibration parameters, and written into the color characteristic configuration file of the display screen to be calibrated.

Further, the above-mentioned single-wavelength standard light source is directly provided by the light source in time-sharing under the control of time-sharing output, or can be selected by the combination of LED lamps, xenon lamps, high pressure discharge lamps, halogen lamps, tungsten lamps, or fluorescent lamps. grating or prism provided.

Further, the wavelength range of the single-wavelength standard light source is an integer value between 360 nm and 830 nm.

Further, the above-mentioned digital imaging device is a camera or a video camera.

Further, the above-mentioned chromaticity correction parameter for each single-wavelength image acquisition is to perform a statistical calculation of the difference between the chromaticity value of each single-wavelength image acquisition and the standard chromaticity value of the single-wavelength standard light source corresponding to a single wavelength, and generate each chromaticity value. A single wavelength total color difference value.

Further, in the above-mentioned step of completing the calibration of the digital imaging device, each actual imaging spectrum and the corresponding total chromatic aberration value of each single wavelength are linearly superimposed.

The present invention further provides a chromatic aberration correction method for a digital imaging device, which includes: providing a digital imaging device to be corrected; providing a wavelength-tunable single-wavelength standard spectrum, which provides single-wavelength standard light sources of each single wavelength according to time series ; Carry out standard image capture, which is to use the digital image capture device to be calibrated to capture images of a single-wavelength standard light source according to time series, so as to generate the gray-scale values of each pixel of each single-wavelength screen and then calculate the corresponding to each single-wavelength. The image acquisition chromaticity value; the image acquisition chromaticity correction parameter is generated, which is to perform statistical calculation of the difference between the image acquisition chromaticity value of each single wavelength and the standard spectrum of the standard light source corresponding to the single wavelength to generate each single wavelength. acquiring the chromaticity correction parameters; and completing the calibration of the digital imaging device, which is to correct the digital imaging device to be corrected with each single-wavelength imaging chromaticity correction parameter to generate a standard digital imaging device.

Further, the above-mentioned single-wavelength standard light source is directly provided by the light source in time-sharing under the control of time-sharing output, or can be selected by the combination of LED lamps, xenon lamps, high pressure discharge lamps, halogen lamps, tungsten lamps, or fluorescent lamps. grating or prism provided.

Further, the wavelength range of the single-wavelength standard light source is an integer value between 360 nm and 830 nm.

Further, the above-mentioned digital imaging device is a camera or a video camera.

Further, the above-mentioned chromaticity correction parameter for each single-wavelength image acquisition is to perform a statistical calculation of the difference between the chromaticity value of each single-wavelength picture and the standard chromaticity value of the single-wavelength standard light source corresponding to the single wavelength, and generate The total color difference value for each single wavelength.

Further, in the above-mentioned step of completing the calibration of the digital imaging device, the spectrum of each actually captured image and the corresponding total chromatic aberration value of each single wavelength are linearly superimposed.

The present invention further provides a standard image display screen device, which has a built-in color characteristic configuration file, and the color characteristic configuration file records the system calibration according to the above-mentioned digital imaging device and the color difference correction method of the screen parameter.

The present invention also provides a standard digital image capturing device, which is a digital image capturing device to be calibrated, and is combined with an arithmetic module, and the arithmetic module records the above-mentioned chromaticity correction parameters for each single-wavelength imaging, and the arithmetic module executes: For each image acquisition screen, dynamic image correction is performed according to the chromaticity correction parameters of each single wavelength acquisition.

Further, the above-mentioned operation module is an embedded system built in the digital image capturing device to be corrected.

By the implementation of the present invention, at least the following progressive effects can be achieved:

1. It can effectively complete the whole process of chromatic aberration correction from the digital imaging device to the screen.

2. It can effectively complete the chromatic aberration correction of the digital imaging device.

In order for those skilled in the art to understand the technical content of the present invention and implement it accordingly, and according to the contents disclosed in this specification, the claims and the drawings, any person skilled in the art can easily understand the related objects and purposes of the present invention. Advantages, therefore, the detailed features and advantages of the present invention will be described in detail in the embodiments.

Description of drawings

1 is a schematic flowchart of a method for chromatic aberration correction of a digital imaging device and a screen according to an embodiment of the present invention;

2 is a schematic flowchart of a chromatic aberration correction method for a digital image pickup device according to an embodiment of the present invention;

3 is a schematic diagram of the light shape of a single-wavelength standard light source provided by a wavelength-adjustable single-wavelength standard spectrum and its time-sharing according to an embodiment of the present invention;

4A is a schematic diagram of a light source combined with a controller to form a single-wavelength standard light source according to an embodiment of the present invention;

4B is a schematic diagram of a light source combined with a wavelength selector to form a single-wavelength standard light source according to an embodiment of the present invention;

5A is a schematic diagram of a digital imaging device to be corrected combined with a computer according to an embodiment of the present invention;

5B is a schematic diagram of a digital imaging device to be calibrated combined with an embedded system according to an embodiment of the present invention;

6 is a schematic diagram of a system architecture for performing calibration of a display screen to be calibrated according to an embodiment of the present invention;

7A is a schematic structural diagram of a standard digital imaging device according to an embodiment of the present invention;

7B is a schematic structural diagram of a standard digital imaging device according to still another embodiment of the present invention; and

FIG. 8 is a schematic structural diagram of a standard imaging screen device according to an embodiment of the present invention.

【Symbol Description】

S100 digital imaging device and chromatic aberration correction method for screen

S11 provides the digital imaging device to be calibrated and the display screen to be calibrated

S20 provides wavelength tunable single wavelength standard spectrum

S30 for standard acquisition

S40 generates acquisition chromaticity correction parameters

S50 completes digital imaging device calibration

S60 input standard grayscale signal

S70 screen capture before calibration

S80 generates screen chromaticity correction parameters

S90 complete screen calibration

Chromatic aberration correction method of S200 digital imaging device

S12 provides digital imaging device to be corrected

G111 standard digital imaging device

111 Digital imaging device to be corrected

112 screens

113 pixels

114 subpixels

115 Display screen to be calibrated

115a Color Profile Profile

116 Display before calibration

20 single wavelength standard light source

210 Light source

220 Controller

230 wavelength selector

300 standard imaging screen device

410 Acquisition Chromaticity Correction Parameters

50 arithmetic modules

510 Computers

520 Embedded Systems

610 R(0-255)/G(0-255)/B(0-255) standard grayscale signal

810 Screen Chroma Correction Parameters

910 System Calibration Parameters

Detailed ways

As shown in FIG. 1 , the present embodiment is a chromatic aberration correction method S100 for a digital imaging device and a screen, which includes: providing a digital imaging device to be calibrated and a display screen to be calibrated S10; providing a wavelength-tunable single wavelength Standard spectrum S20; carry out standard image acquisition S30; generate image chromaticity correction parameters S40; complete digital image acquisition device correction S50; input standard grayscale signal S60; perform screen image acquisition before correction S70; generate screen chromaticity correction parameters S80; and completing the screen correction S90.

As shown in FIG. 2 , the above-mentioned chromatic aberration correction method S100 of a digital imaging device and a screen includes a chromatic aberration correction method S200 of the digital imaging device, which includes: providing a digital imaging device to be corrected S12; providing a wavelength adjustable Single-wavelength standard spectrum S20; performing standard imaging S30; generating imaging chromaticity correction parameters S40; and completing digital imaging device calibration S50.

Provide the digital imaging device to be calibrated and the display screen to be calibrated S10, which is to provide the digital imaging device to be calibrated 111 to be calibrated and the display screen 115 to be calibrated, and then through the completion of the calibration procedure for subsequent use, The digital imaging device can obtain standard image information, and the display screen can complete standard image presentation. The digital imaging device 111 to be corrected can be a camera or a video camera.

When implementing the chromatic aberration correction method S200 of the digital image capturing device, at this time, the digital image capturing device to be corrected S12 only needs to be provided to be the digital image capturing device 111 to be corrected.

As shown in FIG. 3 , a wavelength-adjustable single-wavelength standard spectrum S20 is provided, which is to provide the single-wavelength standard light sources 20 of each single wavelength in a time-series sequence as a standard during calibration; the wavelength (λn) of the single-wavelength standard light source 20 The range can be an integer value between 360nm and 830nm, and each single wavelength (λn) has a set of standard grayscale values (WR, Ln/WG, Ln/W B, Ln); where W represents grayscale; R is red , G is green, B is blue; Ln represents the wavelength, which can be, for example, a wavelength integer value code from 360 to 830.

As shown in FIG. 4A and FIG. 4B , the above-mentioned single-wavelength standard light source 20 can be directly provided by the light source 210 under the control of the time-sharing output by the controller 220, or provided by the light source 210, such as LED lights, Xenon lamps, high pressure discharge lamps, halogen lamps, tungsten lamps, or fluorescent lamps are provided in combination with wavelength selectors 230, such as gratings or prisms.

Carry out standard image acquisition S30, which is based on the above-mentioned digital image acquisition device 111 to be corrected, according to the above-mentioned timing sequence, to image the single-wavelength standard light source 20, and at this time, each single-wavelength standard light source 20 corresponding to each single-wavelength standard light source 20 will be generated. Each pixel of the single-wavelength screen takes the grayscale value (PR,Ln(x,y)/PG,Ln(x,y)/PB,Ln(x,y); P(Pixel) is the pixel; R is red, G is green, B is blue; Ln represents the wavelength, which can be, for example, a wavelength integer value code from 360 to 830; (x, y) represents the pixel coordinates of the camera image), and then, in order to facilitate subsequent calculations, each The grayscale values (PR,Ln(x,y)/PG,Ln(x,y)/PB,Ln(x,y)) of each pixel of the single-wavelength screen are calculated by chromaticity conversion, and each single Each pixel of the wavelength screen takes the chromaticity value (CLn(x,y)); where C represents the chromaticity value; Ln represents the wavelength, which can be, for example, a wavelength integer value code from 360 to 830; (x,y) represents the camera Like pixel coordinates.

In actual operation, when the digital image capturing device 111 to be corrected performs one image capturing, a frame 112 will be generated, and another frame 112 is composed of a plurality of pixels 113, such as 1024*768 pixels, and another frame 112. Each pixel can be composed of three sub-pixels (sub-pixels) 114, for example, three sub-pixels of R/G/B; therefore, each pixel of the above-mentioned single-wavelength picture takes the grayscale value (PR, Ln(x ,y)/PG,Ln(x,y)/PB,Ln(x,y)), refers to the grayscale value of a single pixel in the picture generated by each single wavelength, and the picture is 1024*768 Take 1 pixel as an example, 1024*768 grayscale values can be generated.

Generate the image acquisition chromaticity correction parameter S40, which is to perform a difference statistical operation between the image acquisition chromaticity value (CLn(x, y)) of each single-wavelength frame after the image acquisition and the corresponding single-wavelength standard spectrum to generate The chromaticity correction parameters for each single wavelength acquisition.

Specifically, the acquisition chromaticity correction parameter S40 is generated, which is to acquire the chromaticity value (CLn(x, y)) of each pixel of each single-wavelength picture after imaging and the corresponding single-wavelength single-wavelength standard light source 20 The standard chromaticity value (SR,Ln(x,y)/SG,Ln(x,y)/SB,Ln(x,y)) is calculated for difference value, and the total color difference value of each single wavelength is generated as Each single-wavelength imaging chromaticity correction parameter; where S represents the standard chromaticity value; Ln represents the wavelength, which can be, for example, a wavelength integer value code from 360 to 830; (x, y) represents the camera imaging pixel coordinates.

More specifically, the above-mentioned step of completing the calibration of the digital imaging device S50 is to linearly superimpose the actual imaging spectrum of each imaging and its corresponding total chromatic aberration value of each single wavelength, so that it can be dynamically The completion of the digital imaging device calibration S50.

As shown in FIG. 5A , in general, the calibration of the digital image capturing device 111 to be calibrated is to determine the captured chromaticity values (CLn(x, y)) and the standard chromaticity values (SR) of the single-wavelength standard light source 20 , Ln(x,y)/SG,Ln(x,y)/SB,Ln(x,y)) is calculated by the operation module 50, for example, the computer/electronic calculator 510 shown in FIG. 7B, to The calculation of generating the acquisition chromaticity correction parameters 410 and using the acquisition chromaticity correction parameters 410 for correction is also performed in the computer 510; that is, the generation of the acquisition chromaticity correction parameters 410 and subsequent corrections are not completed in the camera .

As shown in FIG. 5B , in another case, the above-mentioned computing module 50 may be, for example, an embedded system 520 built in the digital imaging device 111 to be corrected. As shown in FIG. 7A , in this case, the In the image capturing device 111 , the image capturing chromaticity correction parameter 410 is generated by the embedded system 520 and the subsequent dynamic digital image capturing device 111 to be corrected completes real-time chromatic aberration correction.

After the above-mentioned steps of the chromatic aberration correction method S200 of the digital imaging device are completed, the correction of the display screen 115 to be corrected will be performed next.

As shown in FIG. 6 , the standard grayscale signal S60 is input, which is to input the standard grayscale signal 610 with R(0-255)/G(0-255)/B(0-255) into the display screen 115 to be calibrated, At this time, the image generated on the display screen 115 to be calibrated will be the display screen 116 before calibration.

Perform the pre-calibration screen capture S70, which uses the calibrated standard digital imaging device G111 to capture the pre-calibration display screen 116 to generate the pre-calibration screen grayscale value (USR(x,y)/USG(USR(x,y)/USG( x,y)/USB(x,y)); where US represents the grayscale of the screen before correction; R is red, G is green, B is blue; (x,y) represents the screen pixel coordinates; USR(x ,y)/USG(x,y)/USB(x,y) are respectively between 0-255, and then the grayscale value of the screen before correction (USR(x,y)/USG(x,y)/USB (x,y)), which is calculated by chromaticity conversion to correspond to the chromaticity value of the screen before correction.

Generate the screen chromaticity correction parameter S80, which is to input the standard grayscale signal, that is, the standard grayscale signal with R(0-255)/G(0-255)/B(0-255) input to the display screen 115 to be corrected The step signal 610 is subjected to chromaticity conversion, and then calculated with the uncorrected screen chromaticity value generated by the standard digital imaging device G111, so that the screen chromaticity correction parameter 810 shown in FIG. 8 can be generated.

The screen calibration S90 is completed, as shown in FIG. 8 , which is to synthesize the acquisition chromaticity calibration parameters 410 and the screen chromaticity calibration parameters 810 into the system calibration parameters 910, and write into the color characteristic configuration file 115a of the display screen , such as ICCProfile (ie, ICC color profile).

A standard digital imaging device G111 is provided with an arithmetic module 50 in the digital imaging device 111 to be corrected, and the arithmetic module 50 records the above-mentioned chromaticity correction parameters for each single-wavelength imaging; the arithmetic module can be executed, and the Each real-time image capturing frame of the digital image capturing device 111 to be corrected performs dynamic image correction according to each single wavelength capturing chromaticity correction parameter, thereby completing the above-mentioned chromatic aberration correction method S200 of the digital image capturing device.

As shown in FIG. 8, a standard imaging screen device 300 has a built-in color characteristic configuration file, and the above-mentioned color characteristic configuration file records the color difference correction method according to the above-mentioned digital imaging device and screen System calibration parameters 910 generated in S100.

Only the above-mentioned embodiments are used to illustrate the characteristics of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, rather than limit the scope of protection of the present invention, so all others do not depart from the present invention. Equivalent modifications or modifications accomplished in the spirit disclosed in the invention should still be included in the scope defined by the claims.

Claims (11)

1. A digital image capturing device and a method for correcting chromatic aberration of a screen are disclosed, which is characterized by comprising:

providing a digital image capturing device to be corrected and a display screen to be corrected;

providing a wavelength-adjustable single-wavelength standard spectrum light source, which is a single-wavelength standard light source for providing each single wavelength of a standard spectrum according to time sequence and time sharing;

performing standard image capture, which uses the digital image capture device to be corrected to capture images of the single-wavelength standard light source according to the time sequence so as to generate image capture gray scale values of each pixel of each single-wavelength picture and then calculate image capture chromatic values corresponding to each single-wavelength picture;

generating image capturing chromaticity correction parameters, wherein the image capturing chromaticity value of each single-wavelength picture and the standard spectrum corresponding to the single wavelength are subjected to difference value statistical operation to generate each single-wavelength image capturing chromaticity correction parameter;

completing the calibration of the digital image capturing device, wherein the digital image capturing device to be calibrated is calibrated by each single-wavelength image capturing chromaticity calibration parameter so as to generate a standard digital image capturing device;

inputting a standard gray scale signal, namely inputting the R/G/B standard gray scale signal into the display screen to be corrected to generate a display screen before correction;

taking the image of the front correction screen by using the standard digital image taking device to generate the gray scale value of the front correction screen, and calculating the chromatic value of the front correction screen;

generating a screen chrominance correction parameter, which is to calculate the screen chrominance value before correction after chrominance conversion is carried out on the standard gray-scale signal so as to generate the screen chrominance correction parameter; and

and finishing screen correction, namely synthesizing the image capturing chromaticity correction parameter and the screen chromaticity correction parameter into a system correction parameter, and writing the system correction parameter into a color characteristic configuration file of the display screen to be corrected.

2. The chromatic aberration correction method of claim 1, wherein the wavelength range of the single-wavelength standard light source is an integer value between 360nm and 830 nm.

3. The method as claimed in claim 1, wherein the chromatic aberration correction parameter for each single-wavelength image capture is obtained by performing a difference statistic operation on the chromatic aberration of each single-wavelength image capture and a standard chromatic aberration of the single-wavelength standard light source corresponding to the single wavelength to generate a total chromatic aberration value for each single wavelength.

4. The method as claimed in claim 3, wherein the step of completing the calibration of the digital image capturing device is to linearly superimpose each actual image capturing spectrum and the corresponding total color difference value of each single wavelength.

5. A chromatic aberration correction method of a digital image capturing device is characterized by comprising the following steps:

providing a digital image capturing device to be corrected;

providing a wavelength-adjustable single-wavelength standard spectrum light source, which is a single-wavelength standard light source for providing each single wavelength of a standard spectrum according to time sequence and time sharing;

performing standard image capture, which uses the digital image capture device to be corrected to capture images of the single-wavelength standard light source according to the time sequence so as to generate image capture gray scale values of each pixel of each single-wavelength picture and then calculate image capture chromatic values corresponding to each single-wavelength picture;

generating image capturing chromaticity correction parameters, wherein the image capturing chromaticity value of each single-wavelength picture and the standard spectrum corresponding to the single wavelength are subjected to difference value statistical operation to generate each single-wavelength image capturing chromaticity correction parameter; and

and completing the calibration of the digital image capturing device, wherein the digital image capturing device to be calibrated is calibrated by each single-wavelength image capturing chromaticity calibration parameter so as to generate a standard digital image capturing device.

6. The method according to claim 5, wherein the wavelength range of the standard single-wavelength light source is an integer value between 360nm and 830 nm.

7. The method as claimed in claim 5, wherein the chromatic aberration correction parameter for each single-wavelength image capture is obtained by performing a difference statistic operation on the chromatic aberration of each single-wavelength image capture and the standard chromatic aberration of the single-wavelength standard light source corresponding to the single wavelength to generate a total chromatic aberration value for each single wavelength.

8. The method as claimed in claim 7, wherein the step of completing the calibration of the digital image capturing device is to linearly superimpose each actually captured spectrum and the corresponding total color difference value of each single wavelength.

9. A standard imaging screen device, comprising a display screen to be corrected, wherein a color characteristic configuration file is built in the standard imaging screen device, and the color characteristic configuration file records the system correction parameters calculated according to the digital image capturing device and the color difference correction method of the screen as claimed in claim 1.

10. A standard digital image capturing device, wherein an operation module is combined with the digital image capturing device to be corrected, and the operation module records the chromaticity correction parameter for each single wavelength image capturing calculated by the chromatic aberration correction method of the digital image capturing device as claimed in claim 7, the operation module performs: and performing dynamic image correction on each image-taking picture according to each single-wavelength image-taking chromaticity correction parameter.

11. The apparatus as claimed in claim 10, wherein the computing module is an embedded system built in the apparatus.

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