CN114640836B - Video data mapping method, LED display controller and LED display system - Google Patents
Video data mapping method, LED display controller and LED display system Download PDFInfo
- Publication number
- CN114640836B CN114640836B CN202011484206.8A CN202011484206A CN114640836B CN 114640836 B CN114640836 B CN 114640836B CN 202011484206 A CN202011484206 A CN 202011484206A CN 114640836 B CN114640836 B CN 114640836B
- Authority
- CN
- China
- Prior art keywords
- video data
- video
- led display
- mapping
- target
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000013506 data mapping Methods 0.000 title claims abstract description 32
- 238000013507 mapping Methods 0.000 claims abstract description 38
- 238000012545 processing Methods 0.000 claims description 16
- 238000007781 pre-processing Methods 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 2
- 240000004282 Grewia occidentalis Species 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/67—Circuits for processing colour signals for matrixing
-
- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Image Processing (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention relates to a video data mapping method, an LED display controller and an LED display system, wherein the video data mapping method is used for mapping RGB Limited Range format video data into full gray scale video data and comprises the following steps: acquiring RGB Limited Range-format input video data; for each target pixel point in the input video data, acquiring video data of adjacent pixel points according to a preset adjacent rule, and forming video data of a target neighborhood together with the video data of the target pixel point; and weighting the video data of the target neighborhood by using the weight value corresponding to the target neighborhood, and combining the mapping coefficient to obtain the video data of the target pixel point mapped to the full gray scale range. The video data after mapping changes more gently, in the high-low gray scale range, the problem of gray scale combination does not occur; the contrast, definition and image quality can be effectively improved.
Description
Technical Field
The present invention relates to the field of LED display screens, and in particular, to a video data mapping method, an LED display controller, and an LED display system.
Background
The LED display screen has the advantages of bright color, high brightness, long service life, energy conservation, high gray scale, wide visual angle, customizable shape and the like, and is widely applied to scenes such as traffic, commercial advertisement, information release, sports events, command monitoring centers and the like. The LED display system composed of the LED display screen is only a video receiving and displaying device, and can only passively receive input videos in various video formats, such as RGB format, YCC422 format, YCC444 format, YCC420 format, and the like, and then output and display the input videos on the LED display screen.
The RGB formats include, in particular, RGB Limited Range and RGB Full Range, as affected by the television industry. Taking 8bit video data as an example, the grayscale Range of the RGB Limited Range format is 16-235, while the grayscale Range of the RGB Full Range format is 0-255. While the LED display screen is supporting a full gray scale range of 0-255. When the input video is in RGB Limited Range format, if the input video is directly output and displayed without processing, the loss of the 0-15 low gray scale range and the prompt of the 235-255 high gray scale range can occur, so that the display of the full gray scale range can not be realized, and the display effect is seriously influenced.
The general solution is that when the input video is in RGB Limited Range format, the data of low gray scale is directly reduced by 16 values; for high gray data, 20 values are directly added to realize the mapping from the RGB Limited Range format to the RGB Full Range format. However, this results in serious deterioration of contrast and sharpness in the gray scale range of 0 to 15 and 235 to 255, and poor image quality.
Disclosure of Invention
Accordingly, it is necessary to provide a video data mapping method, an LED display controller, and an LED display system, which solve the problems of reduced contrast and sharpness and poor image quality in the high-low gray scale Range when the conventional LED display screen is used for mapping RGB Limited Range format to RGB Full Range format.
An embodiment of the present application provides a video data mapping method, configured to map video data in RGB Limited Range format in an LED display system to video data in a full gray scale range, including:
acquiring RGB Limited Range-format input video data;
for each target pixel point in the input video data, acquiring video data of adjacent pixel points according to a preset adjacent rule, and forming video data of a target neighborhood together with the video data of the target pixel point;
and weighting the video data of the target neighborhood by using the weight value corresponding to the target neighborhood, and combining the mapping coefficient to obtain the video data of the target pixel point mapped to the full gray scale range.
In some embodiments, the preset adjacency rule is 4 adjacency or 8 adjacency.
In some embodiments, before the step of obtaining the video data mapped to the full gray scale range of the target pixel point by weighting the video data of the target neighborhood with the weight value corresponding to the target neighborhood and combining the mapping coefficient, the method further includes:
preprocessing the video data of the target neighborhood.
In some embodiments, the preset adjacency rule is 8 adjacencies, and the target neighborhood includes a target pixel, a 4 adjacency pixel and a diagonal adjacency pixel, wherein the weight value of the target pixel is greater than the weight value of the 4 adjacency pixel, and the weight value of the 4 adjacency pixel is greater than the weight of the diagonal adjacency pixel.
In some embodiments, when the target pixel is determined to be located at the boundary, the weight value of the adjacent pixel of the row/column located at the boundary among the weight values of the target neighborhood is assigned to the pixel having the valid video data.
Another embodiment of the application provides an LED display controller, which includes a video acquisition unit, a format recognition unit, a cache unit, a mapping unit, a video clipping unit and a video output unit; wherein,,
the video acquisition unit is used for receiving video source data input from the outside and acquiring the video source data to obtain acquired video data;
the format recognition unit is used for recognizing the video format of the video source data, and when the format is judged to be RGB Limited Range format, the collected video data is stored in the cache unit; when judging other formats, transmitting the acquired video data to the video clipping unit;
the mapping unit is configured to read the collected video data from the buffer unit, execute the video data mapping method according to any one of the foregoing embodiments, and map the video data in RGB Limited Range format into video data in a full gray scale range;
the video clipping unit is used for receiving the collected video data or the mapped video data, clipping the video data according to a preset processing strategy, and outputting the video data to the LED display screen for display through the video output unit.
In some embodiments, the video acquisition unit acquires the received video source data line by line, and the acquired video data consists of line video data; when the format is determined to be RGB Limited Range, the line video data acquired by the video acquisition unit are stored to the cache unit line by line; when the cache unit stores the preset number of line video data, triggering the mapping unit to start executing the video data mapping method.
The embodiment of the application also provides an LED display system, which comprises an LED display screen and an LED display controller, wherein the LED display controller receives video data input from outside and controls the LED display screen to display a corresponding picture, and the LED display controller is the LED display controller in any one of the embodiments.
Another embodiment of the present application also provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the video data mapping method of any of the preceding embodiments.
After identifying the video data in the RGB Limited Range format, the video data mapping scheme and the LED display controller provided in the embodiments of the present application assign a certain weight to the video data of surrounding pixel points when mapping the video data in the RGB Limited Range format to the video data in the RGB Full Range format. Therefore, the video data of the mapped pixel points change more smoothly, and the problem of gray scale combination can not occur in the high and low gray scale ranges; the contrast, definition and image quality can be effectively improved.
Drawings
FIG. 1 is a schematic diagram of a frame structure of an LED display system according to an embodiment of the present application;
FIG. 2 is a flow chart of a video data mapping method according to an embodiment of the present application;
FIG. 3 is a flowchart illustrating a video data mapping method according to another embodiment of the present application;
FIG. 4 is a schematic diagram of the distribution of pixels in a target neighborhood using 4 neighbors;
FIG. 5 is a schematic diagram of the distribution of pixels in a target neighborhood using 8 neighbors;
fig. 6 is a schematic diagram of a frame structure of an LED display controller according to an embodiment of the present application.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. In addition, embodiments of the present application and features of the embodiments may be combined with each other without conflict.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 2, an embodiment of the present application discloses a video data mapping method for mapping RGB Limited Range format video data in an LED display system to full gray scale video data, which includes:
s100, acquiring RGB Limited Range-format input video data;
s200, aiming at each target pixel point in the input video data, acquiring video data of adjacent image points according to a preset adjacent rule, and forming video data of a target neighborhood together with the video data of the target pixel point;
and S300, weighting the video data of the target neighborhood by using the weight value corresponding to the target neighborhood, and combining the mapping coefficient to obtain the video data of the target pixel point mapped to the full gray scale range.
As shown in fig. 1, an LED display system includes an LED display screen 20 and an LED display controller 10, and the LED display controller 10 receives externally input video data and controls the LED display screen 20 to display a corresponding screen. When the LED display controller 10 receives input video data in the format of RGB Limited Range, the video data mapping method of the embodiment of the present application can be performed.
When the video data mapping method of the embodiment of the present application is executed, each pixel point in the input video data in RGB Limited Range format is mapped into the full gray scale range. Each pixel is a target pixel.
For each target pixel point, determining adjacent pixel points according to a preset adjacent rule, so that the adjacent pixel points and the target pixel points form a target field. The preset adjacency rule may be 4 adjacency, 8 adjacency, or m adjacency. Fig. 4 shows a schematic diagram of a target neighborhood with (x, y) as a target pixel under the 4-adjacency rule. Fig. 5 shows a schematic representation of a target neighborhood under an 8 adjacency rule.
After the target neighborhood is obtained, the weight value corresponding to the target neighborhood, namely the weight corresponding to the target pixel point and the adjacent pixel point, has different weights. The video data of all the pixel points in the target neighborhood can be weighted and summed by utilizing the weight value corresponding to the target neighborhood; multiplying by the mapping coefficient K M The video data mapped to the Full gray scale Range of the target pixel point, namely, the video data in the RGB Full Range format can be obtained.
In general, the weight value of the target pixel point needs to be larger, even much larger, than the weight value of the neighboring pixel point. For example, the ratio between the two can be between 10 and 100.
The following takes 4 adjacency as an example of a preset adjacency rule, and the scheme is further explained and illustrated.
As shown in fig. 3, after the input video data in the format of RGB Limited Range is acquired, sliding window processing is performed with respect to the target pixel as a center according to a window with a size of 3*3 and a step length of 1 pixel, and the video data is captured in a sliding manner, so as to obtain sliding window data with respect to the target pixel as a center. For each sliding window data, it may be in the form of a matrix, as shown below.
Wherein (x, y) is the coordinates of the target pixel point, and a (x, y) represents the video data of the target pixel point. (x-1, y-1) … (x+1, y+1) and the like are pixel points around the target pixel point, and a (x-1, y-1) … a (x+1, y+1) and the like are video data of each pixel point.
For simplicity of description, a (x, y) may represent one of red, green, and blue data. It will be appreciated that a (x, y) may also represent gray scale data. Next, description will be made of an example in which red data is represented by a (x, y).
As shown in fig. 4, for 4 adjacent, in the target area, the adjacent pixel is a pixel directly adjacent to the target pixel in the lateral or longitudinal direction, and specifically includes (x, y-1), (x-1, y), (x, y+1), (x+1, y). The video data a of the target neighborhood may be recorded in a matrix form as follows.
Then the weight value W of the corresponding target neighborhood is obtained as follows
Wherein W is 4 The weight values of the adjacent target neighborhoods of 4 are adopted, w (x, y) and w (x, y) … w (x, y+1) and the like represent the weight values of all pixel points in the target neighborhoods, the value is 0-1, and the sum of all the weight values is 1.
The following formula may be used for mapping the target pixel to the video data of the full gray scale range.
Wherein K is M For mapping coefficients, A (x+i, y+j) is video data of each pixel point of the target neighborhood, and w (x+i, y+j) is each image of the corresponding target neighborhoodAnd the weight value of the pixel.
K M The value of (2) may be set in advance. K (K) M The setting can be performed according to the ratio of the maximum values in the gray scale range before and after the mapping calculation. Illustratively, K M May be set to 255/235 or 256/235.
Illustratively, assume that the sliding window data isThe video data of the target pixel point is 230, and the weight value of the corresponding target neighborhood is +.>K M The value is 256/235.
Through the mapping of the video data mapping method of this embodiment, the target pixel point is mapped to the video data a of the full gray scale range M :
A M ＝256/235*[205*0.025+205*0.025+230*0.9+205*0.025+205*0.025]＝247
In the video data mapping method of the embodiment of the present application, when video data in RGB Limited Range format is mapped to video data in RGB Full Range format, video data of surrounding pixels is given a certain weight. Therefore, the video data of the mapped pixel points change more smoothly, and the problem of gray scale combination can not occur in the high and low gray scale ranges; the contrast, definition and image quality can be effectively improved.
In some embodiments, as shown in fig. 3, before step S300, it may further include:
s250, preprocessing the video data of the target neighborhood.
Because the human eye is more sensitive to low gray value changes and when the gray value increases to a certain value, the sensitivity of the human eye decreases. Therefore, in order to make the change curve after mapping the video data in the low gray range larger, and when the gray value rises to a certain value, the change curve is relatively gentle, in step S250, the preprocessing may specifically be:
subtracting the lowest gray level value in the RGB Limited Range format from the video data in the preset low gray range;
for video data within a preset high gray range, subtracting a preset value, wherein the preset value is smaller than the lowest gray value in the RGB Limited Range format.
For example, the RGB Limited Range format may have a gray scale range of 16-235, a minimum gray scale value of 16, and a predetermined value of 5. It will be appreciated that the predetermined value may be any other positive value less than 16. The predetermined low ash range may be 16-230 and the predetermined high ash range may be 230-235. Mapping coefficient K M May be set to 230/200.
Next, a description will be given of a case where 8 adjacencies are used as an example of the preset adjacency rule.
As shown in fig. 5, for the 8-neighbor, the target neighbor includes 4-neighbor pixel points and diagonal-neighbor pixel points. The target neighborhood includes a complete sliding window data, which can be noted as:
the preprocessing performed is: executing a (x, y) -16 if the video data a (x, y) belongs to a preset low gray scale range; if the video data A (x, y) belongs to a preset high gray range, A (x, y) -5 is performed.
The preprocessed video data is denoted as a', where (x, y) represents coordinates of the pixel point, and a (x, y) represents the preprocessed video data of the pixel point.
Because the pixels of the target neighborhood include all video data in one sliding window data. At this time, the weight value of the target neighborhoodWherein, the weight value of the target pixel point>Weights of 4 adjacent pixels>Diagonal neighborAnd weighting the pixel points.
Illustratively, assume that the sliding window data isThe video data of the target pixel point is 230, and the weight value of the corresponding target neighborhood is +.>K M The value is 230/200.
Preprocessing video data of a target neighborhood, and marking the preprocessed video data as
The mapping formula of the video data mapping method of this embodiment is as follows:
through the mapping of the video data mapping method of this embodiment, the target pixel point is mapped to the video data a of the full gray scale range M ＝243。
The video data in the low gray range is subjected to the pretreatment of the reduction value, so that the change curve of the video data after being mapped is larger, the characteristic that human eyes are more sensitive to the change of the low gray value is more met, and the low gray display effect after being mapped is improved.
It will be appreciated that in the gray scale range of the RGB Limited Range format, there may be intermediate gray scale regions in addition to the preset low gray scale range, the preset high gray scale range. For example, the predetermined low gray range may be 16-27, the predetermined high gray range may be 230-235, and the intermediate gray region may be 28-229. In step S250, when preprocessing is performed, the original value may be maintained without processing the video data belonging to the intermediate gradation region.
In some embodiments, in some scenarios, it may be desirable to tilt to a high gray scale range when mapping to enhance the high gray scale display effect. At this time, the preprocessing in step S250 may be to increase the video data by a certain value, such as increasing the difference between the highest gray level value in the RGB Limited Range format and the highest gray level value in the full gray level range.
For example, the RGB Limited Range format may have a gray scale range of 16-235, a maximum gray scale value of 235, and a difference between the maximum gray scale value 255 of the full gray scale range of 20, which may be a 20 value added to the video data during preprocessing.
It will be appreciated that the value of the increase may be different for video data in the preset low gray scale range and video data in the preset high gray scale range. The value of the video data increase in the preset high gray scale range may be 20; and the video data in the preset low gray scale range increases by a value of less than 20, such as 5.
In some embodiments, when the target pixel point is determined to be at the boundary, in the sliding window data, the video data of the pixel point corresponding to the row or column of the boundary may be recorded as 0. At this time, the weight value of the adjacent pixel points of the row/column located on the boundary may be assigned to the pixel point having the valid video data.
Taking 8 adjacency as an example, for a non-boundary target pixel point, it corresponds to the weight value of the target neighborhood
When the target pixel is located on the boundary and is not at the four corners, the upper row, the lower row, the left column or the right column of the target pixel in the sliding window data has no valid video data. Taking the example that the target pixel point is located at the upper boundary, the upper line has no valid video data. At this time, after the weight value is reassigned, the weight value corresponding to the target neighborhood
When the target pixel point is located on the boundary and is at a four-corner position, adjacent rows and columns in the sliding window data have no effective video data. At this time, after the weight value is reassigned, the corresponding targetWeight value of neighborhood
As shown in fig. 6, an embodiment of the present application further provides an LED display controller 10, which includes a video acquisition unit 100, a format recognition unit 200, a buffer unit 400, a mapping unit 500, a video clipping unit 300, and a video output unit 600; wherein,,
the video acquisition unit 100 is configured to receive video source data input from the outside, and acquire the video source data to obtain acquired video data;
a format recognition unit 200, configured to recognize a video format of the video source data, and store the collected video data to the buffer unit 400 when the video source data is determined to be in the RGB Limited Range format; when judging other formats, transmitting the collected video data to the video clipping unit 300;
a mapping unit 500, configured to read the collected video data from the buffer unit 400, perform the video data mapping method described in the foregoing embodiment, and map the video data in RGB Limited Range format into video data in a full gray scale range;
the video clipping unit 300 is configured to receive the collected video data or the mapped video data, perform clipping according to a preset processing policy, and output the clipping result to the LED display screen for display via the video output unit 600.
After identifying the video data in the RGB Limited Range format, the LED display controller in the embodiment of the present application gives a certain weight to the video data of surrounding pixel points when mapping the video data in the RGB Limited Range format into the video data in the RGB Full Range format. Therefore, the video data of the mapped pixel points change more smoothly, and the problem of gray scale combination can not occur in the high and low gray scale ranges; the contrast, definition and image quality can be effectively improved.
In some embodiments, in order to improve the processing efficiency of the video data and reduce the time delay, when the video acquisition unit 100 acquires the received video source data, the video acquisition unit performs row by row, and the acquired video data is composed of row video data; when the format is determined to be RGB Limited Range, the line video data acquired by the video acquisition unit 100 is stored in the buffer unit 400 line by line; when the buffer unit 400 stores a preset number of lines of video data, the trigger mapping unit 500 starts to perform the video data mapping method described in the foregoing embodiment, and maps the video data in RGB Limited Range format to the video data in full gray scale range. In the process of performing the video data mapping method, the trigger mapping unit 500 reads a corresponding number of line video data from the buffer unit 400 whenever the buffer unit 400 stores one line of video data or a preset number of lines of video data.
The preset number can be set to 3 lines, so when the buffer unit 400 stores 3 lines of line video data, the sliding window processing of the window with the size of 3*3 and the step length of 1 pixel point is just satisfied, and the mapping of the video data can be started without waiting for the acquisition and buffer of a frame of complete video data. Therefore, the line-level video acquisition and caching can be realized, compared with the existing frame-level video acquisition and caching, the time delay in the LED display controller is greatly reduced, the processing efficiency of video data is improved, and the time delay requirement when the LED display system is used for on-site real-time display can be well met.
In some embodiments, the buffer unit 400 is also configured to buffer collected video data in other formats, and the video clipping unit 300 reads the video data from the buffer unit 400 and performs clipping processing according to a preset processing policy. In this way, the problem that the processing speeds of the video acquisition unit 100 and the video clipping unit 300 are inconsistent can be solved, and the buffer unit 400 is utilized to buffer the video data, so that the problem that the acquired video data is lost due to the slower processing speed of the video clipping unit 300 is avoided.
In some embodiments, the LED display screen 20 may be divided into a plurality of display areas, and the video output unit 600 may have a plurality of output ports, each of which is connected to one of the display areas; the preset processing strategy is specifically that video data of a corresponding area position of an output port is intercepted in the video data according to the area position of a display area connected with the output port in the whole LED display screen. In this way, the video clipping unit 300 clips video data of a plurality of display areas according to the number of output ports.
It can be appreciated that, according to the proportional relationship between the video data area and the display area of the LED display screen, the preset processing strategy may further include a scaling operation.
Further, the output port may be a network port, and the video output unit 600 may further package the cut video data into a network data packet, and then output the network data packet to the LED display screen for display through the corresponding output port.
As shown in fig. 1, another embodiment of the present application provides an LED display system, which includes an LED display screen 20 and an LED display controller 10, where the LED display controller 10 receives externally input video data and controls the LED display screen 20 to display a corresponding picture; the LED display controller 10 is the LED display controller described in the foregoing embodiment.
The same advantageous effects are also obtained because the LED display controller described in the previous embodiment is employed.
Another embodiment of the present application also provides a storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the video data mapping method according to any one of the above embodiments.
The components/modules/units of the system/computer apparatus integration, if implemented as software functional units and sold or used as separate products, may be stored in a computer readable storage medium. The computer readable storage medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
In the several embodiments provided herein, it should be understood that the disclosed systems and methods may be implemented in other ways. For example, the system embodiments described above are merely illustrative, e.g., the division of the components is merely a logical functional division, and additional divisions may be implemented in practice.
In addition, each functional module/component in the embodiments of the present invention may be integrated in the same processing module/component, or each module/component may exist alone physically, or two or more modules/components may be integrated in the same module/component. The integrated modules/components described above may be implemented in hardware or in hardware plus software functional modules/components.
It will be evident to those skilled in the art that the embodiments of the invention are not limited to the details of the foregoing illustrative embodiments, and that the embodiments of the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of embodiments being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is evident that the word "comprising" does not exclude other elements or steps, and that the singular does not exclude a plurality. A plurality of units, modules or means recited in a system, means or terminal claim may also be implemented by means of software or hardware by means of one and the same unit, module or means. The terms first, second, etc. are used to denote a name, but not any particular order.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. A video data mapping method for mapping RGB Limited Range format video data in an LED display system to full gray scale range video data, comprising:
acquiring RGB Limited Range-format input video data;
for each target pixel point in the input video data, acquiring video data of adjacent pixel points according to a preset adjacent rule, and forming video data of a target neighborhood together with the video data of the target pixel point;
weighting the video data of the target neighborhood by using the weight value corresponding to the target neighborhood, and combining the mapping coefficient to obtain the video data of the target pixel point mapped to the full gray scale range; and setting the mapping coefficient according to the ratio of the maximum value in the gray scale range before and after mapping calculation.
2. The video data mapping method according to claim 1, wherein the preset adjacency rule is 4 adjacency or 8 adjacency.
3. The video data mapping method according to claim 1, wherein before the step of obtaining the video data mapped to the full gray scale range of the target pixel point by weighting the video data of the target neighborhood by using the weight value corresponding to the target neighborhood and combining the mapping coefficient, the method further comprises:
preprocessing the video data of the target neighborhood.
4. The video data mapping method according to claim 2, wherein the preset adjacency rule is 8 adjacencies, the target neighborhood includes a target pixel point, a 4 adjacency pixel point and a diagonal adjacency pixel point, the weight value of the target neighborhood is greater than the weight value of the 4 adjacency pixel point, and the weight value of the 4 adjacency pixel point is greater than the weight of the diagonal adjacency pixel point.
5. The video data mapping method according to claim 4, wherein when it is determined that the target pixel is located at the boundary, the weight value of the adjacent pixel of the row/column located at the boundary among the weight values of the target neighborhood is assigned to the pixel having the valid video data.
6. The LED display controller is characterized by comprising a video acquisition unit, a format identification unit, a cache unit, a mapping unit, a video clipping unit and a video output unit; wherein,,
the video acquisition unit is used for receiving video source data input from the outside and acquiring the video source data to obtain acquired video data;
the format recognition unit is used for recognizing the video format of the video source data, and when the format is judged to be RGB Limited Range format, the collected video data is stored in the cache unit; when judging other formats, transmitting the acquired video data to the video clipping unit;
the mapping unit is used for reading the collected video data from the buffer unit, executing the video data mapping method according to any one of claims 1-5, and mapping the video data in RGB Limited Range format into video data in a full gray scale range;
the video clipping unit is used for receiving the collected video data or the mapped video data, clipping the video data according to a preset processing strategy, and outputting the video data to the LED display screen for display through the video output unit.
7. The LED display controller of claim 6, wherein the video acquisition unit performs, line by line, acquisition of the received video source data, the acquired video data consisting of line video data; when the format is determined to be RGB Limited Range, the line video data acquired by the video acquisition unit are stored to the cache unit line by line; when the cache unit stores the preset number of line video data, triggering the mapping unit to start executing the video data mapping method.
8. An LED display system comprising an LED display screen and an LED display controller, the LED display controller receiving externally input video data and controlling the LED display screen to display a corresponding picture, characterized in that the LED display controller is the LED display controller of claim 6 or 7.
9. A storage medium having stored thereon a computer program, which when executed by a processor implements the video data mapping method of any of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011484206.8A CN114640836B (en) | 2020-12-15 | 2020-12-15 | Video data mapping method, LED display controller and LED display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011484206.8A CN114640836B (en) | 2020-12-15 | 2020-12-15 | Video data mapping method, LED display controller and LED display system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114640836A CN114640836A (en) | 2022-06-17 |
| CN114640836B true CN114640836B (en) | 2023-07-25 |
Family
ID=81945143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011484206.8A Active CN114640836B (en) | 2020-12-15 | 2020-12-15 | Video data mapping method, LED display controller and LED display system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114640836B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115547230B (en) * | 2022-11-23 | 2023-03-10 | 南京芯视元电子有限公司 | Video data display processing method and device, micro display screen and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951523A (en) * | 2010-09-21 | 2011-01-19 | 北京工业大学 | Adaptive colour image processing method and system |
| CN103702060A (en) * | 2013-12-31 | 2014-04-02 | 京东方科技集团股份有限公司 | Super-high definition display device and video signal conversion method |
| CN104505021A (en) * | 2014-12-16 | 2015-04-08 | 利亚德光电股份有限公司 | Pixel display adjusting method and device |
| CN105590597A (en) * | 2014-11-10 | 2016-05-18 | 乐金显示有限公司 | Method and apparatus for expanding dynamic range of display device |
| CN111160215A (en) * | 2019-12-25 | 2020-05-15 | Tcl华星光电技术有限公司 | Image identifier extraction device, and brightness adjustment method and device of image identifier |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6757431B2 (en) * | 2000-12-19 | 2004-06-29 | Xerox Corporation | Resolution conversion for anti-aliased images using loose gray scale template matching |
| KR101359920B1 (en) * | 2007-04-03 | 2014-02-12 | 포항공과대학교 산학협력단 | Driving apparatus for display device, display device including the same and driving method of display device |
| US7881556B2 (en) * | 2007-10-10 | 2011-02-01 | Himax Technologies Limited | Method of image processing and device thereof |
-
2020
- 2020-12-15 CN CN202011484206.8A patent/CN114640836B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951523A (en) * | 2010-09-21 | 2011-01-19 | 北京工业大学 | Adaptive colour image processing method and system |
| CN103702060A (en) * | 2013-12-31 | 2014-04-02 | 京东方科技集团股份有限公司 | Super-high definition display device and video signal conversion method |
| CN105590597A (en) * | 2014-11-10 | 2016-05-18 | 乐金显示有限公司 | Method and apparatus for expanding dynamic range of display device |
| CN104505021A (en) * | 2014-12-16 | 2015-04-08 | 利亚德光电股份有限公司 | Pixel display adjusting method and device |
| CN111160215A (en) * | 2019-12-25 | 2020-05-15 | Tcl华星光电技术有限公司 | Image identifier extraction device, and brightness adjustment method and device of image identifier |
Non-Patent Citations (1)
| Title |
|---|
| 《基于变形目镜和OLED的全景周视成像与显示技术》;罗杰超 等;《中国光学》;第752-759页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114640836A (en) | 2022-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5334402B2 (en) | Display apparatus and method for improving flicker of video | |
| CN107680056B (en) | Image processing method and device | |
| CN110706172B (en) | Low-illumination color image enhancement method based on adaptive chaotic particle swarm optimization | |
| CN109686342B (en) | Image processing method and device | |
| CN113516939B (en) | Brightness correction method and device, display equipment, computing equipment and storage medium | |
| CN110445989A (en) | Image processing method, device, storage medium and electronic equipment | |
| CN107862672B (en) | Image defogging method and device | |
| JPH08317250A (en) | Dynamic picture control circuit | |
| CN113163127B (en) | Image processing method, device, electronic equipment and storage medium | |
| CN113299245A (en) | Method and device for adjusting local backlight of display equipment, display equipment and storage medium | |
| CN114640836B (en) | Video data mapping method, LED display controller and LED display system | |
| TWI835280B (en) | A tone mapping method, device and system | |
| US20050001907A1 (en) | Signal processing device, signal processing program and electronic camera | |
| CN113068011B (en) | Image sensor, image processing method and system | |
| CN108564633B (en) | Gray scale image compression method and device and computer equipment | |
| US20240362760A1 (en) | Image processing method and electronic device | |
| CN113824894A (en) | Exposure control method, device, equipment and storage medium | |
| CN115699785A (en) | Screen shooting control method, terminal device and storage medium | |
| CN113891081A (en) | Video processing method, device and equipment | |
| CN115691396A (en) | Display control method, device, equipment and storage medium for LED display screen | |
| CN115131220A (en) | Image adjusting method, device and computer storage medium | |
| JP2001045303A (en) | Image thresholding method | |
| JP3817371B2 (en) | Image processing method, apparatus, and recording medium | |
| CN117939307B (en) | Self-adaptive brightness adjusting method suitable for fusion camera | |
| CN103841384A (en) | Image-quality optimization method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |