CN115951853A - Pseudo contour eliminating method, pseudo contour eliminating device, viewing equipment and computer readable storage medium - Google Patents

Abstract

The invention discloses a method and a device for eliminating false contours, a viewing device and a computer readable storage medium, wherein the method comprises the following steps: determining a contour line area of a current display picture, and acquiring a saturation change value and a chrominance change value in the contour line area; determining whether the contour line area is a false contour or not according to the saturation change value and the chrominance change value; and if the contour line area is a false contour, executing false contour elimination processing operation. By applying the false contour elimination method in the invention to the film watching equipment, the phenomena of blurring and distortion of the displayed picture caused by mistakenly eliminating the edge contour can be avoided, and the actual false contour is eliminated, so that the picture quality of the displayed picture of the film watching equipment is improved in real time.

Description

False contour elimination method, device, viewing device, and computer-readable storage medium

technical field

The invention relates to the technical field of digital display, in particular to a false contour elimination method, device, viewing equipment and computer-readable storage medium.

Background technique

In the field of digital display, the reduction of bit depth will lead to false contour phenomenon (False Contour) in the image. Specifically, as a result of bit depth reduction, edges similar to contour lines will appear in areas where pixel values are close to flat in the picture. The reduction in bit depth may come from various limitations, such as video memory limitations, physical characteristics of the display, display drivers, and low-precision MPEG (Moving Pictures Experts Group, Dynamic Picture Experts Group) quantization. Once the false contour is generated, the visual defects of the false contour can only be eliminated or reduced through post-processing to improve the image quality.

The current display device has low detection and positioning accuracy for false contours, and some non-false contour edges are often eliminated by mistake. For example, when the color bar screen with regular and gradual changes is input, the false contour elimination method of the display device is prone to false detection. The edge of the color bar is a false outline, and the edge of the color bar is eliminated, resulting in blurring and distortion of the display screen, which seriously affects the user's viewing and use experience.

Contents of the invention

The main purpose of the present invention is to provide a false contour elimination method, device, viewing equipment and computer-readable storage medium, aiming to solve the problem that the current display device has low detection and positioning accuracy for false contours, which easily leads to the occurrence of false contours on the display screen. Blurred, distorted technical issues.

To achieve the above object, the present invention provides a method for eliminating false contours, the method for eliminating false contours comprises the following steps:

Determine the contour line area of the currently displayed picture, and obtain the saturation change value and the chromaticity change value at the contour line area;

determining whether the contour area is a false contour according to the saturation change value and the chroma change value;

If the contour area is a false contour, a false contour elimination processing operation is performed.

Optionally, the step of determining whether the contour area is a false contour according to the saturation change value and the chroma change value includes:

If both the saturation change value and the chroma change value are zero, it is determined that the contour line area is not a false contour, and the contour line area of the currently displayed image is reserved.

Optionally, the step of determining whether the contour area is a false contour according to the saturation change value and the chroma change value includes:

judging whether the saturation change value is smaller than a preset saturation change threshold;

If the saturation change value is less than a preset saturation change threshold, it is judged whether the chroma change value is less than a preset chroma change threshold;

If the chromaticity change value is smaller than a preset chromaticity change threshold, it is determined that the contour line area is a false contour.

Optionally, after the step of judging whether the saturation change value is smaller than a preset saturation change threshold, the method further includes:

If the saturation change value is greater than or equal to a preset saturation change threshold, it is determined that the contour line area is not a false contour, and the contour line area of the currently displayed image is retained.

Optionally, the step of determining the contour line area of the currently displayed picture and obtaining the saturation change value and the chromaticity change value at the contour line area includes:

Determine all contour line areas of the current display image in the flat area, and obtain average saturation change values and average chromaticity change values at the contour line areas.

Optionally, after the step of determining whether the contour area is a false contour, the method further includes:

If the contour area is not a pseudo-contour, then obtain a display screen of a continuous preset number of frames;

If the corresponding contour line areas of the display screens of the consecutive preset number of frames are all determined to be false contours, a false contour elimination processing operation is performed.

Optionally, before the step of determining the contour area of the currently displayed picture, the method further includes:

Get the color space type corresponding to the current display screen;

If the color space type is an RGB color space, converting the RGB color space to an HSI color space;

Based on the HSI color space, the step of determining the contour area of the currently displayed picture is performed.

In addition, in order to achieve the above object, the present invention also provides a device for eliminating false contours, the device for eliminating false contours includes:

A picture detection module, configured to determine the contour area of the currently displayed picture, and obtain the saturation change value and the chroma change value at the contour line area;

A contour recognition module, configured to determine whether the contour area is a false contour according to the saturation change value and the chroma change value;

The image quality optimization module is configured to perform a false contour elimination processing operation if the contour area is a false contour.

In addition, in order to achieve the above object, the present invention also provides a viewing device, which includes a processor, a storage unit, and a false contour elimination program stored on the storage unit that can be executed by the processor, wherein the When the false contour elimination program is executed by the processor, the steps of the false contour elimination method described above are realized.

The present invention also provides a computer-readable storage medium, where a false contour elimination program is stored on the computer-readable storage medium, wherein, when the false contour elimination program is executed by a processor, the false contour elimination method as described above is realized A step of.

The false contour elimination method in the technical solution of the present invention obtains the saturation change value and the chroma change value at the contour line area by determining the contour line area of the current display screen; according to the saturation change value and The chromaticity change value determines whether the contour line area is a false contour; if the contour line area is a false contour, a false contour elimination processing operation is performed. The invention solves the technical problem that the current display device has low detection and positioning accuracy of false contours, which easily leads to blurred and distorted display pictures.

The present invention mainly detects the two picture parameters of the saturation change value and the chroma change value in the current display picture, and determines the contour area of the current display picture according to the two picture parameters of the saturation change value and the chroma change value. Whether it is a pseudo-contour, and based on a large number of experiments determined on the basis of gray-scale images, color-scale images, other regular images, and the picture parameter characteristics of conventional display images in the contour area, gray-scale images, color-scale images The edge contour (contour line area) in the image and other regular images is determined as a non-pseudo-contour, to prevent the false elimination of the non-false contour edges of gray-scale images, color-scale images and other regular images, and to avoid false Eliminate blurring and distortion of the display screen caused by edge contours. The edge contour of the conventional display image is determined as a false contour, the actual false contour is accurately determined, and the false contour is eliminated, thereby improving the picture quality of the display screen of the viewing device in real time, and improving the viewing experience of the user. experience.

Description of drawings

FIG. 1 is a schematic structural diagram of the hardware operating environment of the viewing device involved in the solution of the embodiment of the present invention;

Fig. 2 is a schematic flow chart of the first embodiment of the false contour elimination method of the present invention;

FIG. 3 is a detailed flowchart of step S20 involved in an embodiment of the false contour elimination method of the present invention;

FIG. 4 is a schematic flow chart after step S20 involved in an embodiment of the false contour elimination method of the present invention;

FIG. 5 is a schematic flow chart before step S10 involved in an embodiment of the false contour elimination method of the present invention;

Fig. 6 is a schematic diagram of contour saturation and chroma changes involved in the false contour elimination method of the present invention;

FIG. 7 is a schematic diagram of a grayscale image involved in the false contour elimination method of the present invention;

Fig. 8 is a schematic diagram of the frame structure of the false contour elimination device of the present invention.

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

An embodiment of the present invention proposes a movie viewing device. The movie viewing device may be a digital display device such as a smart TV, a smart phone, a tablet computer, or a personal computer, which is not limited here.

As shown in FIG. 1 , FIG. 1 is a schematic structural diagram of the hardware operating environment of the viewing device involved in the solution of the embodiment of the present invention.

As shown in FIG. 1 , the viewing device may include: a processor 1001 , such as a CPU, a network interface 1004 , a user interface 1003 , a storage unit 1005 , and a communication bus 1002 . Wherein, the communication bus 1002 is used to realize connection and communication between these components. The user interface 1003 may include a display (Display), an input unit such as a control panel, and the optional user interface 1003 may also include a standard wired interface and a wireless interface. Optionally, the network interface 1004 may include a standard wired interface and a wireless interface (such as a WIFI interface). The storage unit 1005 may be a high-speed RAM storage unit, or a stable storage unit (non-volatile memory), such as a disk storage unit. Optionally, the storage unit 1005 may also be a storage device independent of the aforementioned processor 1001 . The false contour elimination program may be included in the storage unit 1005 as a computer storage medium.

Those skilled in the art can understand that the hardware structure shown in FIG. 1 does not constitute a limitation on the device, and may include more or less components than those shown in the figure, or combine some components, or arrange different components.

Continuing to refer to FIG. 1 , the storage unit 1005 as a computer-readable storage medium in FIG. 1 may include an operating system, a user interface module, a network communication module, and a false contour elimination program.

In Fig. 1, the network communication module is mainly used to connect to the server and perform data communication with the server; and the processor 1001 can call the false contour elimination program stored in the storage unit 1005, and perform the following operations:

Determine the contour line area of the currently displayed picture, and obtain the saturation change value and the chromaticity change value at the contour line area;

determining whether the contour area is a false contour according to the saturation change value and the chroma change value;

If the contour area is a false contour, a false contour elimination processing operation is performed.

Further, the processor 1001 may call the false contour elimination program stored in the memory 1005, and also perform the following operations:

If both the saturation change value and the chroma change value are zero, it is determined that the contour line area is not a false contour, and the contour line area of the currently displayed image is reserved.

Further, the processor 1001 may call the false contour elimination program stored in the memory 1005, and also perform the following operations:

judging whether the saturation change value is smaller than a preset saturation change threshold;

If the saturation change value is less than a preset saturation change threshold, it is judged whether the chroma change value is less than a preset chroma change threshold;

If the chromaticity change value is smaller than a preset chromaticity change threshold, it is determined that the contour line area is a false contour.

Further, the processor 1001 may call the false contour elimination program stored in the memory 1005, and also perform the following operations:

If the saturation change value is greater than or equal to the preset saturation change threshold, it is determined that the contour line area is not a false contour, and the contour line area of the current display picture is retained

Further, the processor 1001 may call the false contour elimination program stored in the memory 1005, and also perform the following operations:

Determine all contour line areas of the current display image in the flat area, and obtain average saturation change values and average chromaticity change values at the contour line areas.

Further, the processor 1001 may call the false contour elimination program stored in the memory 1005, and also perform the following operations:

If the contour area is not a pseudo-contour, then obtain a display screen of a continuous preset number of frames;

If the corresponding contour line areas of the display screens of the consecutive preset number of frames are all determined to be false contours, a false contour elimination processing operation is performed.

Further, the processor 1001 may call the false contour elimination program stored in the memory 1005, and also perform the following operations:

Get the color space type corresponding to the current display screen;

If the color space type is an RGB color space, converting the RGB color space to an HSI color space;

Based on the HSI color space, the step of determining the contour area of the currently displayed picture is performed.

Based on the above-mentioned hardware structure of the viewing device, various embodiments of the false contour elimination method of the present invention are proposed.

In order to facilitate the understanding of the various embodiments of the present invention below, the embodiments in the technical solution of the present invention are briefly summarized according to the overall scheme:

The present invention mainly determines the picture parameter changes of different types of display pictures in the contour area on the basis of a large number of experiments, specifically saturation changes and chroma changes, so that it can be based on the two items of saturation change value and chroma change value parameters, and compare these two parameters with the corresponding change thresholds to determine the type of picture corresponding to the current display picture and determine whether the contour line area of the current display picture is a false contour, and the contour line area is a false contour In this case, false contour elimination processing is performed, and in the case where the contour area is not a false contour, that is, in the case of a non-false contour, edge contour protection is performed, and false contour elimination processing is not performed.

An embodiment of the present invention provides a false contour elimination method.

Please refer to FIG. 2, which is a schematic flow chart of the first embodiment of the false contour elimination method of the present invention; in the first embodiment of the present invention, the false contour elimination method includes the following steps:

Step S10, determining the contour line area of the currently displayed image, and obtaining the saturation change value and the chroma change value at the contour line area;

In this embodiment, the false contour elimination method is applied to a movie viewing device, and the movie viewing device is not limited to digital display devices such as smart TVs, smart phones, and tablet computers that can be used for movie viewing.

The current display screen refers to a frame of image and video screen currently played by the viewing device, and the contour area refers to one or more edge contours in the current display screen. For some display screens, these edge contours are false. Outlines need to be processed to eliminate false contours; for other display images, these edge contours do not belong to false contours, and these edge contours do not need to be eliminated.

Obtain the saturation value and chroma value on both sides of the contour line in the contour area, subtract the saturation value on both sides of the contour line to obtain the saturation change value, and subtract the saturation value on both sides of the contour line Values are subtracted to obtain the chromaticity change value.

In order to further understand the contour area in this embodiment, please refer to FIG. 6 . FIG. 6 is a schematic diagram of the saturation and chromaticity changes of the contour involved in the false contour elimination method of the present invention. As shown in the figure, five contour lines are included in the figure, and the area including the contour line and the two sides of the contour line is the contour line area. From top to bottom, the values of the HSI (hue, saturation, brightness) color space corresponding to the current display screen are obtained in order: [156,152,97], [157,156,93], [161,164,92], and the corresponding saturation The chroma change values are 4 and 8, respectively, and the corresponding chroma change values are 1 and 4, respectively.

In one embodiment, the step S10 includes:

Determine all contour line areas of the current display image in the flat area, and obtain average saturation change values and average chromaticity change values at the contour line areas.

Considering that the false contour phenomenon is most likely to occur in the low-frequency region or the gradient-smooth region of the image, these regions are usually called flat regions or flat-field regions. In the flat field area or flat area, since the pixel values are relatively close, and the change is relatively gentle in a large range, the false contour is more likely to be perceived by the human eye, resulting in a bad visual experience.

Therefore, in this embodiment, only the contour line areas in the flat area in the current display screen can be identified and determined, all the contour line areas in the flat area can be determined, and the corresponding contour line areas at each contour line area can be obtained. Saturation change value and hue change value, add all saturation change values and divide by the number of contour line areas corresponding to all contour line areas in the flat area to get the average saturation change value, and the same reason The average chromaticity change value is obtained. Furthermore, when the average saturation change value and the average chroma change value are not zero and are less than their respective change thresholds (preset saturation change threshold and preset chroma change threshold), the flat area or flat field area is eliminated Pseudo contour processing.

Through this embodiment of the present invention, the viewing device can focus on eliminating false contours in the flat area, which not only reduces the processing load of the viewing device, improves the efficiency of eliminating false contours, and improves the user's viewing experience, but also avoids The edge contours in other areas of the current display screen are falsely eliminated to prevent the display screen of the viewing device from being blurred and distorted.

Step S20, determining whether the contour area is a false contour according to the saturation change value and the chroma change value;

On the premise that the saturation change value or the chroma change value is not zero, the saturation change value may be compared with a corresponding preset saturation change threshold, and the chroma change value Compared with the corresponding preset chroma change threshold, when both the saturation change value and the chroma change value meet certain conditions, it is determined that the contour area is a false contour, and the saturation change value and the chroma change value are determined to be false contours. When one of the above chromaticity change values does not meet a certain condition, it is determined that the contour area is not a false contour, that is, a non-pseudo contour.

In one embodiment, the step S20 includes:

If both the saturation change value and the chroma change value are zero, it is determined that the contour line area is not a false contour, and the contour line area of the currently displayed image is reserved.

Judging whether the saturation change value and the chroma change value are both zero, if the saturation change value and the chroma change value are both zero, then it can be determined that the current display picture is a grayscale picture, that is, The picture of black and white gray color can refer to Fig. 7, and Fig. 7 is the gray-scale image schematic diagram that the method for eliminating false contour of the present invention relates to, does not need to do the processing of eliminating false contour at this moment, thereby retains the contour area of described current display picture, In this way, the defect in the prior art that edge regions in the grayscale picture are also eliminated is overcome.

Please refer to FIG. 3, in another embodiment, the step S20 includes:

Step S21, judging whether the saturation change value is smaller than a preset saturation change threshold;

Step S22, if the saturation change value is less than a preset saturation change threshold, judge whether the hue change value is less than a preset hue change threshold;

Step S23, if the chromaticity change value is smaller than a preset chromaticity change threshold, determine that the contour line area is a false contour.

In the case that one of the picture parameters in the saturation change value and the hue change value is not zero or both are not zero, it may continue to judge whether the saturation change value is less than a preset saturation change threshold, if If the saturation change value is greater than or equal to the preset saturation change threshold, it can be determined that the currently displayed picture is a color scale picture or other regular pictures, and false contour elimination processing is not required for this.

If the saturation change value is less than the preset saturation change threshold, it can be further judged whether the chroma change value is less than the preset chroma change threshold, if the chroma change value is less than the preset chroma change threshold, then it can be considered The current display screen is a normal display screen, that is, a normal display screen. The normal display screen here refers to the display screen when various TV programs are played normally, and can also be considered as a display screen other than the gray scale screen and the color scale screen. The corresponding contour line area in the current display image is a false contour, and then the false contour elimination process is performed.

It should be added that the preset saturation change threshold can be set according to actual needs, but is preferably 10, and the preset chroma change threshold can also be set according to actual needs, but is preferably 10.

The preset saturation change threshold of 10 and the preset chroma change threshold of 10 are based on the results of a large number of experiments. The process of the test is mainly as follows: through the analysis of multiple ordinary color pictures (conventional display pictures) HIS color space pictures, the change of saturation and chroma in the edge area is generally ±5, while for the normal changing color scale picture, The change of saturation and chroma in the edge area is generally more than ±10, so this can be used as a benchmark for judging the boundary threshold.

Through this embodiment, it can be accurately determined whether the current display picture belongs to a regular display picture or a color scale picture, so that the operation of eliminating false contours is only performed on the regular display picture, improving the quality performance of the current display picture, and avoiding color scale The false contours are eliminated on the screen to prevent the false contours from being eliminated by mistake and ensure that the color scale image will not be blurred or distorted.

In one embodiment, after the step S22, after the step of judging whether the chromaticity change value is smaller than a preset chromaticity change threshold, the method further includes:

If the saturation change value is greater than or equal to a preset saturation change threshold, it is determined that the contour line area is not a false contour, and the contour line area of the currently displayed image is retained.

If the saturation change value is greater than or equal to the preset saturation change threshold, it can be determined that the current display screen is a color scale screen or other regular screen, and the corresponding contour area is not a false contour. Eliminate false contour processing. Similarly, if the saturation change value is less than the preset saturation change threshold, but if the chroma change value is greater than or equal to the preset chroma change threshold, then the current display picture is also considered to be a color scale picture or other regular pictures , performing contour protection on the current display image, and retaining the contour area of the current display image. In this way, the elimination of false contours on the color scale screen is avoided, the false contours are prevented from being eliminated by mistake, and the color scale screen is not blurred and distorted.

Step S30, if the contour area is a false contour, perform a false contour elimination processing operation.

If the contour line area is a false contour, the false contour in the current display screen can be eliminated by means of preset precision smoothing, bit depth expansion, etc., and other false contour elimination methods and algorithms can also be used to eliminate the false contour, here There is no limit, so as to improve the picture quality of the currently displayed picture.

The present invention mainly detects the two picture parameters of the saturation change value and the chroma change value in the current display picture, and determines the contour area of the current display picture according to the two picture parameters of the saturation change value and the chroma change value. Whether it is a pseudo-contour, and based on a large number of experiments determined on the basis of gray-scale images, color-scale images, other regular images, and the picture parameter characteristics of conventional display images in the contour area, gray-scale images, color-scale images The edge contour (contour line area) in the image and other regular images is determined as a non-pseudo-contour, to prevent the false elimination of the non-false contour edges of gray-scale images, color-scale images and other regular images, and to avoid false Eliminate blurring and distortion of the display screen caused by edge contours. The edge contour of the conventional display image is determined as a false contour, the actual false contour is accurately determined, and the false contour is eliminated, thereby improving the picture quality of the display screen of the viewing device in real time, and improving the viewing experience of the user. experience.

Please refer to FIG. 4 , in one embodiment, after the step S20 of determining whether the contour area is a false contour, the method further includes:

Step S200, if the contour area is not a pseudo-contour, acquire a display screen with a preset number of consecutive frames;

In this embodiment, if it is determined that the contour area of the currently displayed image is not a false contour, it is necessary to perform contour protection on the currently displayed image, that is, to preserve the edge contour of the currently displayed image. Furthermore, the display images of the preset number of frames are acquired continuously, and the preset number of frames here can be set according to actual needs, such as 5 or 10, and there is no limitation here.

Step S210, if the corresponding contour line areas of the display screens of the consecutive preset number of frames are all determined to be false contours, perform a false contour elimination processing operation.

Perform the above-mentioned analysis and judgment on the saturation change value and chroma change value corresponding to each of the display screens of the continuous preset number of frames. When each saturation change value and each chroma change value are zero, false Contour elimination processing, in the case that there are non-zero parameters in each saturation change value and each chroma change value, it is judged whether each saturation change value is less than the preset saturation change threshold and whether each chroma change value is If it is less than the preset saturation change threshold, if each saturation change value is less than the preset saturation change threshold and each chroma change value is less than the preset saturation change threshold, then the profile protection will be exited, and the currently playing display The screen performs false contour elimination processing, and executes the step S10 in a loop.

Through this embodiment of the present invention, it is possible to avoid critical point jumps (saturation change values and chroma change values corresponding to consecutive frames of display screens are greater than or equal to preset saturation change thresholds and preset chroma changes threshold, and the situation where the saturation change value and the chroma change value are less than the preset saturation change threshold and the preset chroma change threshold) cause false triggering of false contour elimination, thereby improving false contour positioning and false contour elimination Accuracy and reliability, avoid false contour elimination processing for some display images that do not actually need to eliminate false contours, and prevent blurring and distortion of the display images.

Please refer to FIG. 5, in one embodiment, before the step S10, the method further includes:

Step S100, acquiring the color space type corresponding to the current display screen;

In this embodiment, the color control type can be divided into RGB (red, green, blue) color space and HSI (hue, saturation, brightness) color space.

Step S110, if the color space type is an RGB color space, converting the RGB color space into an HSI color space;

If the color space type is HSI color space, conversion processing is not required, and step S10 can be performed directly. If the color space type is RGB color space, the RGB color space needs to be converted into a corresponding HSI color space.

The process of converting from RGB color space to HSI color space can be expressed as:

Among them, H represents the chroma value, S represents the saturation value, I represents the brightness value, R represents the red component value, G represents the green component value, B represents the blue component value, and θ represents the spatial angle.

Step S120, based on the HSI color space, perform the step of determining the contour area of the currently displayed image.

On the basis of the HSI color space, the step S10 is executed, so that the contour area of the current display picture can be quickly identified, and on the basis of the HSI color space, the false contour of the current display picture is realized. Eliminate processing.

In addition, referring to FIG. 8 , FIG. 8 is a schematic diagram of the frame structure of the device for eliminating false contours according to the present invention. The present invention also proposes a device for eliminating false contours, which includes:

The picture detection module 10 is used to determine the contour area of the currently displayed picture, and obtain the saturation change value and the chroma change value at the contour line area;

A contour identification module 20, configured to determine whether the contour area is a false contour according to the saturation change value and the chroma change value;

The image quality optimization module 30 is configured to perform a false contour elimination processing operation if the contour area is a false contour.

Optionally, the contour recognition module 20 is also used for:

If both the saturation change value and the chroma change value are zero, it is determined that the contour line area is not a false contour, and the contour line area of the currently displayed image is reserved.

Optionally, the contour recognition module 20 is also used for:

judging whether the saturation change value is smaller than a preset saturation change threshold;

If the saturation change value is less than a preset saturation change threshold, it is judged whether the chroma change value is less than a preset chroma change threshold;

If the chromaticity change value is smaller than a preset chromaticity change threshold, it is determined that the contour line area is a false contour.

Optionally, the contour recognition module 20 is also used for:

If the saturation change value is greater than or equal to a preset saturation change threshold, it is determined that the contour line area is not a false contour, and the contour line area of the currently displayed image is retained.

Optionally, the picture detection module 10 is also used for:

Determine all contour line areas of the current display image in the flat area, and obtain average saturation change values and average chromaticity change values at the contour line areas.

Optionally, the image quality optimization module 30 is also used for:

If the contour area is not a pseudo-contour, then obtain a display screen of a continuous preset number of frames;

If the corresponding contour line areas of the display screens of the consecutive preset number of frames are all determined to be false contours, a false contour elimination processing operation is performed.

Optionally, the picture detection module 10 is also used for:

Get the color space type corresponding to the current display screen;

If the color space type is an RGB color space, converting the RGB color space to an HSI color space;

Based on the HSI color space, the step of determining the contour area of the currently displayed picture is performed.

The specific implementation manners of the device for eliminating false contours of the present invention are basically the same as the embodiments of the method for eliminating false contours described above, and will not be repeated here.

In addition, the present invention also provides a computer-readable storage medium. A false contour elimination program is stored on the computer-readable storage medium of the present invention, wherein when the false contour elimination program is executed by a processor, the steps of the above-mentioned false contour elimination method are realized.

For the method implemented when the false contour elimination program is executed, reference may be made to various embodiments of the false contour elimination method of the present invention, which will not be repeated here.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable storage unit capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable storage unit produce an article of manufacture comprising instruction means, The instruction means implements the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

It should be noted that, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

The above is only a preferred embodiment of the present invention, and does not therefore limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or direct/indirect use All other relevant technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. A false contour eliminating method is characterized by comprising the following steps:

determining a contour line area of a current display picture, and acquiring a saturation change value and a chrominance change value at the contour line area;

determining whether the contour line area is a false contour or not according to the saturation change value and the chrominance change value;

and if the contour line area is a false contour, executing false contour elimination processing operation.

2. The method of eliminating false contour according to claim 1, wherein the step of determining whether the contour region is a false contour based on the saturation change value and the chromaticity change value includes:

and if the saturation change value and the chrominance change value are both zero, determining that the contour line area is not a pseudo contour, and reserving the contour line area of the current display picture.

3. The method of eliminating false contours as set forth in claim 1, wherein the step of determining whether the contour region is a false contour or not based on the saturation variation value and the chromaticity variation value includes:

judging whether the saturation change value is smaller than a preset saturation change threshold value;

if the saturation change value is smaller than a preset saturation change threshold, judging whether the chroma change value is smaller than a preset chroma change threshold or not;

and if the chromaticity change value is smaller than a preset chromaticity change threshold value, determining the contour line area as a pseudo contour.

4. The method of eliminating false contours as claimed in claim 1, wherein after the step of determining whether the saturation change value is less than a preset saturation change threshold, the method further comprises:

and if the saturation change value is greater than or equal to a preset saturation change threshold value, determining that the contour line area is not a pseudo contour, and reserving the contour line area of the current display picture.

5. The pseudo contour removal method according to claim 1, wherein the step of determining a contour region of the current display screen, and acquiring a saturation change value and a chromaticity change value at the contour region, comprises:

and determining all contour line areas of the current display picture in the flat area, and acquiring the average saturation change value and the average chroma change value at the contour line areas.

6. The false contour removal method of claim 1, wherein after the step of determining whether the contour region is a false contour, the method further comprises:

if the contour line area is not a false contour, acquiring a display picture with continuous preset frame number;

and if the contour line regions corresponding to the display pictures with the continuous preset frame number are determined as the false contours, executing false contour elimination processing operation.

7. The false contour canceling method according to claim 1, wherein the step of determining a contour region of a current display screen is preceded by the method further comprising:

acquiring a color space type corresponding to a current display picture;

if the color space type is an RGB color space, converting the RGB color space into an HSI color space;

and executing the step of determining the contour line area of the current display picture based on the HSI color space.

8. A false contour canceling device, characterized by comprising:

the image detection module is used for determining a contour line area of a current display image and acquiring a saturation change value and a chrominance change value at the contour line area;

the contour identification module is used for determining whether the contour line area is a false contour or not according to the saturation change value and the chrominance change value;

and the image quality optimization module is used for executing the false contour elimination processing operation if the contour line area is a false contour.

9. A viewing apparatus comprising a processor, a storage unit, and a pseudo contour removal program stored on the storage unit and executable by the processor, wherein the pseudo contour removal program when executed by the processor implements the steps of the pseudo contour removal method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that a false contour elimination program is stored on the computer-readable storage medium, wherein the false contour elimination program, when executed by a processor, implements the steps of the false contour elimination method according to any one of claims 1 to 7.

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