CN110930919A - Image processing method and display driving device - Google Patents
Image processing method and display driving device Download PDFInfo
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- CN110930919A CN110930919A CN201911138599.4A CN201911138599A CN110930919A CN 110930919 A CN110930919 A CN 110930919A CN 201911138599 A CN201911138599 A CN 201911138599A CN 110930919 A CN110930919 A CN 110930919A
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G3/2096—Details of the interface to the display terminal specific for a flat panel
Abstract
The embodiment of the invention provides an image processing method and a display driving device for a display screen, wherein the display screen comprises a display area with pixel points and a non-display area without the pixel points, which are adjacent to each other, and the image processing method comprises the following steps: receiving image data of the whole display screen; setting a first group of pixel points corresponding to a non-display area in image data as black points; smoothing a second group of pixel points corresponding to the edge of the display area in the image data; and sending the processed image data to a display screen, wherein the smoothing process comprises gain compensation on a second group of pixel points according to the shape of the edge of the display area. The invention compensates the gain according to the shape of the display screen, so that each display screen can compensate the optimal smooth effect, and when the invention is applied to the display screen with arc edges, the problem of image jagging at the arc edges of the display screen is solved.
Description
Technical Field
The present invention relates to the field of image processing technologies, and in particular, to an image processing method and a display driving apparatus for a display screen.
Background
In order to increase the screen occupation ratio of the mobile phone, many mobile phone manufacturers are continuously reducing the frame on the front side of the mobile phone, and at the same time, in order to reduce the vacant area on the front side of the mobile phone caused by the front camera, the optical sensor and the mobile phone handset, the mobile phone manufacturers also improve the display screen of the mobile phone.
Currently, mobile phone manufacturers have made improvements to mobile phone displays, such as designing a water drop screen, a bang screen shown in fig. 1 (a), and a hole digging screen shown in fig. 1 (b), and converting four corners of the display screen from right angles to arc corners to be closer to the mobile phone frame. For the improvement of the display screen, the display screen needs to be cut into arc-shaped edge lines, and the display screen is divided into a display area with pixel points and a non-display area without the pixel points by the arc-shaped edge lines. However, since the display screen is formed by arranging a plurality of pixels in an array, the image jagging phenomenon occurs at the arc-shaped edge of the display area.
Aiming at the phenomenon of image sawtooth at the arc-shaped edge of the display screen, an effective processing method is lacked in the prior art.
Disclosure of Invention
In view of this, embodiments of the present invention provide an image processing method and system and a display driving device, which can effectively process the image jagging phenomenon at the arc edge of a display screen, so as to achieve a better processing effect.
According to a first aspect of the present invention, there is provided an image processing method of a display screen, the display screen including a display region having pixel points and a non-display region having no pixel points, which are adjacent to each other, the image processing method comprising:
receiving image data of the whole display screen;
setting a first group of pixel points corresponding to the non-display area in the image data as black points;
smoothing a second group of pixel points corresponding to the edge of the display area in the image data; and
sending the processed image data to the display screen,
and the smoothing treatment comprises the step of carrying out gain compensation on the second group of pixel points according to the shape of the edge of the display area.
Optionally, at least a portion of the non-display area edge is arc-shaped.
Optionally, the second group of pixels is preset in the following manner:
scanning said display screen through a 3 x 3 scanning matrix;
judging whether the current scanning area of the scanning matrix meets a target condition, wherein the target condition is that the center of the scanning matrix is in the display area and the edge of the scanning matrix has a pixel point belonging to the first group of pixel points;
and under the condition that the current scanning area of the scanning matrix meets the target condition, determining the center of the scanning matrix as one pixel point in the second group of pixel points.
Optionally, smoothing a second group of pixel points corresponding to the edge of the display region in the image data, includes:
for each pixel to be smoothed in the second group of pixels, obtaining a gain coefficient of the pixel to be smoothed, wherein the gain coefficient is the ratio of the brightness value of the pixel to be smoothed to the weighted average value of the brightness values of surrounding pixels to the brightness value of the pixel to be smoothed;
and determining the brightness value of the pixel point to be smoothed after processing through the gain coefficient.
Optionally, the brightness value is processed in a weighted average filtering manner to obtain a weighted average value of the brightness value of the pixel point to be smoothed and the brightness value of the surrounding pixel points.
Optionally, the weighted average filter used in the weighted average filtering method is a 3 × 3 weighted matrix, and three rows of weights of the weighted matrix sequentially include, according to a matrix arrangement order: (1,2,1), (2,4,2) and (1,2, 1).
Optionally, the second group of pixels is preset in the following manner:
acquiring a reference line, wherein the reference line is positioned in a display area of the display screen and is separated from an edge line of the display area by a distance of one pixel point along the direction of curvature radius;
traversing the reference line to find each pixel point segmented by the reference line;
and determining the searched pixel point as one pixel point in the second group of pixel points.
Optionally, smoothing a second group of pixel points corresponding to the edge of the display region in the image data, includes:
for each pixel point to be smoothed in the second group of pixel points, acquiring a first area of each pixel point to be smoothed, which faces one side of the display area after being divided by the reference line;
determining the ratio of the first area in the total area of the pixels to be smoothed as the gain coefficient of the pixels to be smoothed;
and determining the product of the brightness value of the pixel point to be smoothed and the gain coefficient as the brightness value of the pixel point to be smoothed after processing.
Optionally, the smoothing processing on the second group of pixel points corresponding to the edge of the display region in the image data without gamma correction of the brightness value included in the image data includes:
obtaining a gain coefficient of the smoothing processing in a linear region;
converting the gain coefficient according to gamma correction characteristics of the display screen;
and adjusting the brightness value of the corresponding pixel point through the converted gain coefficient.
Optionally, the non-display area at least includes any one of a dug-out area, an edge opening area, and a corner rounded area of the display screen.
According to a second aspect of the present invention, there is provided a display driving apparatus for a display panel including a display region with pixel dots and a non-display region without pixel dots, which are adjacent to each other, the display driving apparatus comprising:
the input end is used for receiving image data of the whole display screen;
the preprocessing module is used for setting a first group of pixel points corresponding to the non-display area in the image data as black points;
the processing module is used for carrying out smoothing processing on a second group of pixel points corresponding to the edge of the display area in the image data;
an output for sending the processed image data to the display screen,
and the smoothing treatment comprises the step of carrying out gain compensation on the second group of pixel points according to the shape of the edge of the display area.
Optionally, at least a portion of the non-display area edge is arc-shaped.
Optionally, the second group of pixels is preset in the following manner:
scanning said display screen through a 3 x 3 scanning matrix;
judging whether the current scanning area of the scanning matrix meets a target condition, wherein the target condition is that the center of the scanning matrix is in the display area and the edge of the scanning matrix has a pixel point belonging to the first group of pixel points;
and under the condition that the current scanning area of the scanning matrix meets the target condition, determining the center of the scanning matrix as one pixel point in the second group of pixel points.
Optionally, the processing module is configured to:
for each pixel to be smoothed in the second group of pixels, obtaining a gain coefficient of the pixel to be smoothed, wherein the gain coefficient is the ratio of the brightness value of the pixel to be smoothed to the weighted average value of the brightness values of surrounding pixels to the brightness value of the pixel to be smoothed;
and determining the brightness value of the pixel point to be smoothed after processing through the gain coefficient.
Optionally, the processing module is configured to process the brightness value in a weighted average filtering manner to obtain a weighted average of the brightness value of the pixel to be smoothed and the brightness value of the surrounding pixels.
Optionally, the weighted average filter used in the weighted average filtering method is a 3 × 3 weighted matrix, and three rows of weights of the weighted matrix sequentially include, according to a matrix arrangement order: (1,2,1), (2,4,2) and (1,2, 1).
Optionally, the second group of pixels is preset in the following manner:
acquiring a reference line, wherein the reference line is positioned in a display area of the display screen and is separated from an edge line of the display area by a distance of one pixel point along the direction of curvature radius;
traversing the reference line to find each pixel point segmented by the reference line;
and determining the searched pixel point as one pixel point in the second group of pixel points.
Optionally, the processing module is configured to:
for each pixel point to be smoothed in the second group of pixel points, acquiring a first area of each pixel point to be smoothed, which faces one side of the display area after being divided by the reference line;
determining the ratio of the first area in the total area of the pixels to be smoothed as the gain coefficient of the pixels to be smoothed;
and determining the product of the brightness value of the pixel point to be smoothed and the gain coefficient as the brightness value of the pixel point to be smoothed after processing.
Optionally, the image data includes brightness values that are not gamma-corrected, and the processing module is configured to:
obtaining a gain coefficient of the smoothing treatment in a linear area;
converting the gain coefficient according to gamma correction characteristics of the display screen;
and adjusting the brightness value of the corresponding pixel point through the converted gain coefficient.
Optionally, the non-display area at least includes any one of a dug-out area, an edge opening area, and a corner rounded area of the display screen.
The embodiment of the invention has the following advantages or beneficial effects:
according to the image processing method and the display driving device for the display screen, provided by the embodiment of the invention, after the first group of pixel points corresponding to the non-display area in the image data are set as the black points, the second group of pixel points corresponding to the edge of the display area in the image data are subjected to smoothing treatment, wherein the smoothing treatment is to perform gain compensation on the second group of pixel points according to the shape of the edge of the display area.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing embodiments of the present invention with reference to the following drawings, in which:
FIG. 1 (a) is a schematic view of a Liu Hai screen;
FIG. 1 (b) is a schematic view of a digging screen;
FIG. 2 is a flow chart of an image processing method according to an embodiment of the invention;
fig. 3 is a schematic diagram of a second group of pixels according to a first embodiment of the present invention;
FIG. 4 is a schematic diagram of another second group of pixels according to the first embodiment of the present invention;
FIG. 5 is a flow diagram of another image processing method according to an embodiment of the invention;
FIG. 6 is a graph (a) showing an unprocessed image data display effect;
FIG. 6 is a diagram (b) illustrating the display effect of the image data of FIG. (a) after being processed by the image processing method according to the first embodiment of the present invention;
fig. 7 is a block diagram of a display driving apparatus according to a second embodiment of the present invention;
fig. 8 is a block diagram of another display driving apparatus according to the second embodiment of the present invention.
Detailed Description
The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, and procedures have not been described in detail so as not to obscure the present invention. The figures are not necessarily drawn to scale.
Before describing the image processing method and the display driving apparatus provided by the present invention in detail, it should be noted that, in the embodiment of the present invention, the display screen includes a display region with pixel points and a non-display region without pixel points, which are adjacent to each other. Fig. 2 is a flowchart illustrating an image processing method according to a first embodiment of the invention. Referring to fig. 2, an image processing method for a display screen includes:
step S101, receiving image data of the entire display screen.
Step S102, a first group of pixel points corresponding to the non-display area in the image data are set as black points.
It should be noted that each pixel point is composed of three RGB sub-pixels, where the luminance value range of each sub-pixel is 0 to 255, and when the luminance of three RGB components is 0, the pixel point displays black, so that the first group of pixel points corresponding to the non-display region in the image data is set as black points, and the luminance of three RGB components of the first group of pixel points is set as 0.
Step S103, smoothing a second group of pixel points corresponding to the edge of the display area in the image data, wherein the smoothing comprises performing gain compensation on the second group of pixel points according to the shape of the edge of the display area.
And step S104, sending the processed image data to a display screen.
In the embodiment of the invention, after a first group of pixel points corresponding to a non-display area in image data are set as black points, a second group of pixel points corresponding to the edge of the display area in the image data are subjected to smoothing treatment, wherein the smoothing treatment is to perform gain compensation on the second group of pixel points according to the shape of the edge of the display area.
The non-display area includes, for example, at least any one of a cutout area, an edge opening area, and a corner rounding area of the display screen. In some specific examples, at least a portion of the edge of the non-display area is arc-shaped, so that an obvious image jagging phenomenon occurs at the edge of the display screen.
In an optional embodiment, the second group of pixels is preset in the following manner: scanning the display screen through a 3 x 3 scanning matrix; judging whether the current scanning area of the scanning matrix meets a target condition, wherein the target condition is that the center of the scanning matrix is in a display area and the edge of the scanning matrix has pixels belonging to a first group of pixels; and under the condition that the current scanning area of the scanning matrix meets the target condition, determining the center of the scanning matrix as one pixel point in the second group of pixel points.
For example, in the display screen shown in fig. 3, the white curve is an edge line, and the image data is displayed on the display screen as a white image, where if the black frame is the current scanning area of the scanning matrix, the point P is a pixel point of the processing area, and the entire processing area is composed of the point P and a plurality of points Q shown in fig. 3.
Further, step S103, performing a smoothing process on a second group of pixel points corresponding to the edge of the display area in the image data, including: for each pixel to be smoothed in the second group of pixels, obtaining a gain coefficient of the pixel to be smoothed, wherein the gain coefficient is the ratio of the weighted average value of the brightness value of the pixel to be smoothed and the brightness value of surrounding pixels to the brightness value of the pixel to be smoothed; and determining the brightness value of the pixel point to be smoothed after processing through the gain coefficient, namely determining the product of the gain coefficient and the brightness value of the pixel point to be smoothed as the brightness value of the pixel point to be smoothed after processing. The brightness value can be processed in a weighted average filtering mode to obtain a weighted average value of the brightness value of the pixel point to be smoothed and the brightness value of the surrounding pixel points, wherein a weighted average filter adopted by the weighted average filtering method can be a 3 × 3 weighted matrix, each element of the weighted matrix can be determined according to the adjustment requirement on the processing area, that is, the weight ratio of the weighted average filter can be arbitrarily matched according to the adjustment requirement on the processing area, and three rows of weights of the weighted matrix in some practical operations can be sequentially selected according to the matrix arrangement sequence: (1,2,1), (2,4,2) and (1,2, 1).
It should be noted that, firstly, each numerical value in the weighting matrix only represents a ratio between weights, but each weight needs to be subjected to normalization processing when being used for calculating a gain coefficient of a pixel to be smoothed; second, the weighted average may be a decimal number, and since the luminance value is an integer, the weighted average may be taken by rounding or the like. Based on this, after the display screen without image processing is lighted, the non-display area without pixel points is regarded as the brightness value of 0, and the display area with pixel points is regarded as the brightness value of 255, so taking the current scanning area (located in the black thick line frame with the point P as the center point and including nine pixel points) as an example shown in fig. 3, the brightness of the nine-square grid is (0,255,255; 255,255) in sequence from top to bottom and from left to right, and the brightness of the P point is the integer of the calculation result of the following formula:
[(16*0+32*255+16*255)+(32*255+64*255+32*255)+(16*255+32*255+16*255)]/256，
that is, the P-dot luminance is 239, the P-dot luminance is between 0 and 255, and the luminance gradation between the non-display area and the display area is constructed by the P-dots to alleviate the jagging phenomenon.
In another optional embodiment, the second group of pixels is preset in the following manner: acquiring a reference line (refer to a black arc line shown in fig. 4) which is positioned in a display area of the display screen and is separated from a display area edge line (refer to a white arc line shown in fig. 3) by a distance of one pixel point along a curvature radius direction; traversing the reference line to search each pixel point segmented by the reference line; and determining the searched pixel point as one pixel point in the second group of pixel points. It should be understood that the reference line is a reference line introduced for image processing, and is not a boundary line actually existing in the display screen.
Further, referring to fig. 4, in step S103, performing smoothing processing on a second group of pixel points corresponding to the edge of the display area in the image data, including: for each pixel point to be smoothed in the second group of pixel points, acquiring a first area of each pixel point to be smoothed, which faces one side of the display area after being divided by the reference line; determining the ratio of the first area to the total area of the pixels to be smoothed as the gain coefficient of the pixels to be smoothed; and determining the product of the brightness value and the gain coefficient of the pixel point to be smoothed as the brightness value of the pixel point to be smoothed after processing, so that the brightness value of the pixel point to be smoothed is not only in the transition region of the brightness of the surrounding pixel points, but also is modulated by the number of black pixel points in the surrounding pixel points, and the arc-shaped edge is smoothed.
Referring to fig. 5, in another alternative embodiment, in order to directly display the processed image data on the display screen without gamma correction, in which the luminance values included in the image data are not gamma-corrected, that is, in a linear RGB domain, step S103 is to perform a smoothing process on a second group of pixel points corresponding to the edge of the display area in the image data, and the smoothing process includes:
step S1031, obtaining the gain coefficient G after the smoothing processing in the linear region, and converting the gain coefficient G according to the gamma correction characteristic of the display screen to obtain a converted gain coefficient G';
step S1032, the brightness value of the corresponding pixel point is adjusted by the converted gain coefficient G'.
It should be noted that the gain coefficient G can be obtained by software calculation, and the luminance value included in the image data is multiplied by the ratio of the converted gain coefficient G' to the maximum luminance value to obtain the adjusted luminance value.
The converting the gain coefficient G according to the gamma correction characteristic of the display screen may specifically be that a pre-stored correspondence relationship is read from a memory, where the correspondence relationship is a correspondence relationship between various values of the gain coefficient G obtained according to the gamma correction characteristic of the display screen and values of the converted gain coefficient G'; then, the gain factor G is converted according to the correspondence.
Fig. 6 (a) shows the display effect of unprocessed image data, fig. 6 (b) shows the display effect of the image data of fig. (a) after being processed by the above-described image processing method, and the unprocessed image data is data to display a white image on a display screen. Referring to fig. 6 (a) and (b), it is apparent that there are some regions with brightness between black and white at the edge of the black pixel, i.e. the composition region of the second group of pixels, which alleviates the image jagging at the arc-shaped edge.
Fig. 7 is a block diagram showing a structure of a display driving apparatus for a display panel according to a second embodiment of the present invention, in which the display panel includes a display region having pixels and a non-display region having no pixels, which are adjacent to each other. Referring to fig. 7, the display driving apparatus includes:
an input terminal 100 for receiving image data of the entire display screen;
the preprocessing module 200 is configured to set a first group of pixel points corresponding to a non-display area in the image data as black points;
a processing module 300, configured to perform smoothing on a second group of pixel points corresponding to an edge of the display area in the image data, where the smoothing includes performing gain compensation on the second group of pixel points according to a shape of the edge of the display area;
and an output 400 for transmitting the processed image data to a display screen.
In the display driving apparatus shown in fig. 5, the input terminal 100 is connected to the processing module 300, and the preprocessing module 200 and the input terminal 100 synchronously receive image data.
The display driving device provided by the embodiment of the invention sets the first group of pixel points corresponding to the non-display area in the image data as black points, and then carries out smoothing treatment on the second group of pixel points corresponding to the edge of the display area in the image data, wherein the smoothing treatment is to carry out gain compensation on the second group of pixel points according to the shape of the edge of the display area.
The non-display area of the display screen driven by the display driving device can at least comprise any one of a hole digging area, an edge opening area and a corner rounding area of the display screen. In some particular examples. At least a part of the edge of the non-display area is arc-shaped.
In an optional embodiment, the second group of pixels is preset in the following manner:
scanning the display screen through a 3 x 3 scanning matrix;
judging whether the current scanning area of the scanning matrix meets a target condition, wherein the target condition is that the center of the scanning matrix is in a display area and the edge of the scanning matrix has pixels belonging to a first group of pixels;
and under the condition that the current scanning area of the scanning matrix meets the target condition, determining the center of the scanning matrix as one pixel point in the second group of pixel points.
In an alternative embodiment, the processing module 300 is configured to:
for each pixel to be smoothed in the second group of pixels, obtaining a gain coefficient of the pixel to be smoothed, wherein the gain coefficient is the ratio of the weighted average value of the brightness value of the pixel to be smoothed and the brightness value of surrounding pixels to the brightness value of the pixel to be smoothed;
and determining the brightness value of the pixel point to be smoothed after processing through the gain coefficient.
In an alternative embodiment, the processing module 300 is configured to:
the processing module is used for processing the brightness value in a weighted average filtering mode to obtain a weighted average value of the brightness value of the pixel point to be smoothed and the brightness value of the surrounding pixel points.
In an alternative embodiment, the weighted average filter used by the processing module 300 to implement the weighted average filtering method is a 3 × 3 weighting matrix, and the three rows of weights of the weighting matrix sequentially include, in the order of matrix arrangement: (1,2,1), (2,4,2) and (1,2, 1).
In an optional embodiment, the second group of pixels is preset in the following manner:
acquiring a reference line, wherein the reference line is positioned in a display area of the display screen and is separated from an edge line of the display area by a distance of one pixel point along the direction of the curvature radius;
traversing the reference line to search each pixel point segmented by the reference line;
and determining the searched pixel point as one pixel point in the second group of pixel points.
In an alternative embodiment, the processing module 300 is configured to:
for each pixel point to be smoothed in the second group of pixel points, acquiring a first area of each pixel point to be smoothed, which faces one side of the display area after being divided by the reference line;
determining the ratio of the first area to the total area of the pixels to be smoothed as the gain coefficient of the pixels to be smoothed;
and determining the product of the brightness value of the pixel point to be smoothed and the gain coefficient as the brightness value of the pixel point to be smoothed after processing.
Referring to fig. 8, in an alternative embodiment, the preprocessing module 200 includes a black shading unit 201 and a gain compensation unit 202, where the black shading unit 201 is configured to set a first group of pixels corresponding to a non-display area in image data as black dots, and the gain compensation unit 202 is configured to calculate a gain coefficient G for linear area smoothing; the processing module 300 includes a processing unit 301 and a calculating unit 302, wherein the processing unit 301 is configured to obtain the gain coefficient G calculated by the gain compensation unit 202 and convert the gain coefficient G according to the gamma correction characteristic of the display screen, and the calculating unit 302 adjusts the brightness value of the corresponding pixel point according to the converted gain coefficient G'.
Referring to fig. 8, based on this embodiment, the preprocessing module 200 may include a plurality of sets of black shading units 201 and gain compensation units 202, and one set of black shading units 201 and gain compensation units 202 is for one or a class of arc-shaped edge lines, so that the display driving apparatus may be adapted to a plurality of different display screen designs. Referring to fig. 1 (a) and fig. 1 (b), if a pixel-free region of four corners of a display screen is denoted as corner, a pixel-free region starting at a side line is denoted as Notch, and a hole on the display screen is denoted as hole, the preprocessing module 200 may include three groups of black shading units 201 and gain compensation units 202, where the three groups of black shading units 201 and gain compensation units 202 are respectively directed to corner, Notch and hole, and thus, the display screen may design a number of unlimited Notch and hole and four corner corresponding to the four corners of the display screen. In addition, the display driving device provided by the embodiment of the invention is not limited to the arc-shaped edge line with a specific radian and arc length, nor to the position of the arc-shaped edge line, so that the radian of the edge line of the corner can be set arbitrarily; the position of notch can appear in any one of the four directions of the upper, lower, left and right of the screen, and the length, the width and the radian are all adjustable; the position of the Hole can be arranged in any area of the screen, and the length, the width and the radian of the Hole can be adjusted, so that the display driving device provided by the embodiment of the invention can be flexibly adapted to various different display screen design schemes.
It should be noted that the display driving apparatus provided in the second embodiment of the present invention performs the image processing method described in the first embodiment of the present invention, and in view of the detailed description of the image processing method in the first embodiment, the display driving apparatus in the second embodiment of the present invention is not repeated.
It will be understood that executable instructions which implement specified logical functions may be recombined to create new modules, and thus the above-described display driving apparatus is not limited to being divided by the above-described module division method.
The flowcharts and block diagrams in the figures and block diagrams illustrate the possible architectures, functions, and operations of the systems, methods, and apparatuses according to the embodiments of the present invention, and may represent a module, a program segment, or merely a code segment, which is an executable instruction for implementing a specified logical function. The blocks of the drawings, and the order of the blocks, are intended to better illustrate the processes and steps of the embodiments and should not be taken as limiting the invention itself.
The various modules or units of the system may be implemented in hardware, firmware or software. The software includes, for example, a code program formed using various programming languages such as JAVA, C/C + +/C #, SQL, and the like. Although the steps and sequence of steps of the embodiments of the present invention are presented in method and method diagrams, the executable instructions of the steps implementing the specified logical functions may be re-combined to create new steps. The sequence of the steps should not be limited to the sequence of the steps in the method and the method illustrations, and can be modified at any time according to the functional requirements. Such as performing some of the steps in parallel or in reverse order.
Systems and methods according to the present invention may be deployed on a single server or on multiple servers. For example, different modules may be deployed on different servers, respectively, to form a dedicated server. Alternatively, the same functional unit, module or system may be deployed in a distributed fashion across multiple servers to relieve load stress. The server includes but is not limited to a plurality of PCs, PC servers, blades, supercomputers, etc. on the same local area network and connected via the Internet.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. An image processing method for a display screen, the display screen including a display area having pixel points and a non-display area having no pixel points, which are adjacent to each other, the image processing method comprising:
receiving image data of the whole display screen;
setting a first group of pixel points corresponding to the non-display area in the image data as black points;
smoothing a second group of pixel points corresponding to the edge of the display area in the image data; and
sending the processed image data to the display screen,
and the smoothing treatment comprises the step of carrying out gain compensation on the second group of pixel points according to the shape of the edge of the display area.
2. The method of claim 1, wherein at least a portion of the non-display area edge is curved.
3. The method of claim 2, wherein the second set of pixels are predetermined by:
scanning said display screen through a 3 x 3 scanning matrix;
judging whether the current scanning area of the scanning matrix meets a target condition, wherein the target condition is that the center of the scanning matrix is in the display area and the edge of the scanning matrix has a pixel point belonging to the first group of pixel points;
and under the condition that the current scanning area of the scanning matrix meets the target condition, determining the center of the scanning matrix as one pixel point in the second group of pixel points.
4. The method of claim 3, wherein smoothing a second set of pixels in the image data corresponding to the edge of the display region comprises:
for each pixel to be smoothed in the second group of pixels, obtaining a gain coefficient of the pixel to be smoothed, wherein the gain coefficient is the ratio of the brightness value of the pixel to be smoothed to the weighted average value of the brightness values of surrounding pixels to the brightness value of the pixel to be smoothed;
and determining the brightness value of the pixel point to be smoothed after processing through the gain coefficient.
5. The method of claim 4, wherein the weighted average of the luminance values of the pixels to be smoothed and the luminance values of the surrounding pixels is obtained by processing the luminance values in a weighted average filtering manner.
6. The method according to claim 5, wherein the weighted average filter employed by the weighted average filtering method is a 3 x 3 weighting matrix, and the three rows of weights of the weighting matrix are sequentially in the order of matrix arrangement: (1,2,1), (2,4,2) and (1,2, 1).
7. The method of claim 2, wherein the second set of pixels are predetermined by:
acquiring a reference line, wherein the reference line is positioned in a display area of the display screen and is separated from an edge line of the display area by a distance of one pixel point along the direction of curvature radius;
traversing the reference line to find each pixel point segmented by the reference line;
and determining the searched pixel point as one pixel point in the second group of pixel points.
8. The method of claim 7, wherein smoothing a second set of pixels in the image data corresponding to the edge of the display region comprises:
for each pixel point to be smoothed in the second group of pixel points, acquiring a first area of each pixel point to be smoothed, which faces one side of the display area after being divided by the reference line;
determining the ratio of the first area in the total area of the pixels to be smoothed as the gain coefficient of the pixels to be smoothed;
and determining the product of the brightness value of the pixel point to be smoothed and the gain coefficient as the brightness value of the pixel point to be smoothed after processing.
9. The method of claim 1, wherein the smoothing of the second set of pixels in the image data corresponding to the edge of the display region without gamma correction of the brightness values included in the image data comprises:
obtaining a gain coefficient of the smoothing processing in a linear region;
converting the gain coefficient according to gamma correction characteristics of the display screen;
and adjusting the brightness value of the corresponding pixel point through the converted gain coefficient.
10. The method of claim 1, wherein the non-display area comprises at least any one of a dug-out area, an edge opening area, and a corner rounding area of the display screen.
11. A display driving apparatus for a display panel including a display region having pixel points and a non-display region having no pixel points, which are adjacent to each other, the display driving apparatus comprising:
the input end is used for receiving image data of the whole display screen;
the preprocessing module is used for setting a first group of pixel points corresponding to the non-display area in the image data as black points;
the processing module is used for carrying out smoothing processing on a second group of pixel points corresponding to the edge of the display area in the image data;
an output for sending the processed image data to the display screen,
and the smoothing treatment comprises the step of carrying out gain compensation on the second group of pixel points according to the shape of the edge of the display area.
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