CN112614473B - Data processing method and system, storage medium and terminal - Google Patents
Data processing method and system, storage medium and terminal Download PDFInfo
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- CN112614473B CN112614473B CN202011421274.XA CN202011421274A CN112614473B CN 112614473 B CN112614473 B CN 112614473B CN 202011421274 A CN202011421274 A CN 202011421274A CN 112614473 B CN112614473 B CN 112614473B
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
- G09G5/37—Details of the operation on graphic patterns
- G09G5/373—Details of the operation on graphic patterns for modifying the size of the graphic pattern
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
- G09G5/39—Control of the bit-mapped memory
Abstract
The invention provides a data processing method and system, a storage medium and a terminal, comprising the following steps: creating a pixel display lookup table corresponding to low gray value, grouping and position; the pixel display lookup table is used for storing pixel output control signals of different low gray scale values at each position of each group; judging whether the image data of the current frame is low-gray-scale data or not; for the image data of the low gray data, searching a corresponding pixel output control signal in the pixel display lookup table according to the current low gray value, the current group and the current position; and displaying a corresponding gray value on the current position of the current packet according to the pixel output control signal. The data processing method and system, the storage medium and the terminal can dispersedly display the gray values of the pixels on different groups, thereby ensuring the uniformity of the gray values of the images and improving the image display effect.
Description
Technical Field
The present invention relates to the field of image display technologies, and in particular, to a data processing method and system, a storage medium, and a terminal.
Background
As shown in fig. 1, when displaying a digital image in the prior art, the duration of one frame (one frame) is generally divided into N groups (groups). Preferably, N is a natural number between 1 and 512. Each group displays the responsible display line (scan) once. That is, all lines of the image are repeatedly displayed N times within one frame time, thereby achieving the goal of a high refresh rate. For example, when N is 16, a refresh rate of 60 × 16 to 960Hz can be achieved for 60Hz input images. For another example, when N is 16, if the gray-scale value of a pixel in the image is 320, then each group is displayed, and the pixel is displayed 320/16-20 gray-scale value.
If the high-gray-scale pixel is displayed in each group, the gray scale value of the pixel is displayed; for a low-gray pixel, since the pixel is divided into a plurality of groups, there may be a case where the pixel is not displayed in consecutive groups.
For example, for a pixel having a gradation value of 1, only group # 0 is displayed, and the other groups are not displayed. For pixels with a grayscale value of 2, display is performed only in group # 0 and group #12, and the grayscale value is 1 every time display is performed, while the other groups are not displayed.
In addition, in practical applications, a low-gray non-scattering technique is usually used, that is, a non-scattering threshold is preset, and when a gray value is lower than or equal to the non-scattering threshold, the gray value is only displayed in a certain group and is not scattered into a plurality of groups; when the gray value is larger than the non-scattering threshold value, the gray value is firstly distributed to a plurality of groups, the gray values in the groups are all equal to the non-scattering threshold value, and if residual gray values (which should be smaller than the non-scattering threshold value) exist after distribution, the residual gray values are distributed to another group. This further results in an uneven display of the digital image.
For example, for a partial image with a gray scale of 2, 4 x 4
Line0：2，2，2，2，
Line1：2，2，2，2
Line2：2，2，2，2，
Line3：2，2，2，2，
When displaying, if the set non-scattering threshold is 4, since 2 is less than 4, the gray value 2 is displayed only in group # 0, and is not displayed at all in other groups.
For another example, if the non-blooming threshold is still set to be 4, the pixels with the gray values of 1, 2, 3 and 4 are directly displayed as the gray values of 1, 2, 3 and 4 in the group # 0; for pixels with a grayscale value of 5, grayscale value 4 is displayed in group # 0, and grayscale value 1 is displayed in group # 12. In summary, such a low-gray non-scattering technique further causes that one pixel is not displayed in multiple groups continuously, thereby reducing the refresh rate of the digital image in low gray.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a data processing method and system, a storage medium, and a terminal, which can dispersedly display the gray-level values of pixels in different groups, thereby ensuring the uniformity of the gray-level of an image and improving the image display effect.
To achieve the above and other related objects, the present invention provides a data processing method, comprising: creating a pixel display lookup table corresponding to low gray value, grouping and position; the pixel display lookup table is used for storing pixel output control signals of different low gray scale values at each position of each group; judging whether the image data of the current frame is low-gray-scale data; for the image data of the low gray data, searching a corresponding pixel output control signal in the pixel display lookup table according to the current low gray value, the current group and the current position; and displaying a corresponding gray value at the current position of the current group according to the pixel output control signal.
In an embodiment of the invention, for each pixel in the group, the pixel output control signal uses a first preset signal to indicate that the current low gray scale value is displayed, and uses a second preset signal to indicate that the current low gray scale value is not displayed.
In an embodiment of the present invention, determining whether the image data of the current frame is low gray scale data includes the following steps:
comparing the gray value of the image data of the current frame with a preset threshold;
when the gray value is smaller than the preset threshold value, determining that the gray value is low gray data; otherwise, it is determined as high gradation data.
In an embodiment of the invention, the predetermined threshold is a half of a product of the number of packets of the image data of the current frame and the non-scattering threshold.
In an embodiment of the present invention, the count of the current packet is obtained through a packet counter.
In an embodiment of the present invention, the position is a row position or a column position.
In an embodiment of the present invention, the count of the current row position/column position is obtained by a row/column counter, and the row/column counter performs a cycle count every other packet.
Correspondingly, the invention provides a data processing system, which comprises a creating module, a judging module, a searching module and a display module;
the creation module is used for creating a pixel display lookup table corresponding to low gray scale values, groups and positions; the pixel display look-up table is used for storing pixel output control signals of different low gray scale values at each position of each group;
the judging module is used for judging whether the image data of the current frame is low-gray-scale data;
the searching module is used for searching the corresponding pixel output control signal in the pixel display searching table according to the current low gray value, the current group and the current position for the image data of the low gray data;
the display module is used for displaying a corresponding gray value on the current position of the current grouping according to the pixel output control signal.
The present invention provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the data processing method described above.
Finally, the present invention provides a terminal comprising: a processor and a memory;
the memory is used for storing a computer program;
the processor is configured to execute the computer program stored in the memory, so as to enable the terminal to execute the data processing method.
As described above, the data processing method and system, the storage medium, and the terminal of the present invention have the following advantageous effects:
(1) for pixels with low gray scale values, the gray scale values of the pixels can be dispersedly displayed on different groups;
(2) the uniformity of the image gray scale is ensured, and the condition that no image is displayed on a certain group in a frame of image and all pixels on the certain group are displayed is effectively avoided;
(3) the image display effect is improved.
Drawings
FIG. 1 is a diagram illustrating image data in one embodiment of the prior art;
FIG. 2 is a flow chart of a data processing method according to an embodiment of the present invention;
FIG. 3 is a block diagram of a data processing system according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a terminal according to an embodiment of the invention.
Description of the element reference numerals
31 creation module
32 judging module
33 lookup module
34 display module
41 processor
42 memory
Detailed Description
The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The data processing method and system, the storage medium and the terminal can dispersedly display the gray values on different groups of the pixels with low gray values, thereby avoiding the situation that no image is displayed on a certain group in a frame of image and all the pixels on the certain group are displayed, ensuring the uniformity of the image gray and effectively improving the image display effect.
As shown in fig. 2, in an embodiment, the data processing method of the present invention includes the following steps:
step S1, creating a pixel display lookup table corresponding to the low gray scale values, the groups and the positions; the pixel display look-up table is used to store pixel output control signals for different low gray scale values at various locations of various groups.
Specifically, a preset threshold is set for the magnitude of the gradation value. When the gray value is smaller than the preset threshold value, judging that the gray value is a low gray value; and when the gray value is greater than or equal to the preset threshold, determining that the gray value is a high gray value. For a high gradation value, pixel display is performed in each packet of one frame of image data when data processing is performed. For low gray values, at the time of data processing, scatter processing is performed so that pixels are distributed in each packet of one frame of image data as much as possible. Wherein one frame duration is divided into a plurality of groups, each group being for displaying image data.
Therefore, in order to realize the pixel scatter distribution at the time of low gray scale values, a Look-Up Table (LUT) for pixel display corresponding to low gray scale values, groups, and positions is created in advance. The pixel display look-up table is used to store pixel output control signals for different low gray scale values at various locations of various groups. That is, the pixel display look-up table pre-stores pixel output control information of different low gray scale values at different positions of different groups to control whether the pixels at the positions are displayed. And the aim of pixel dispersed display is fulfilled by setting the pixel display lookup table.
In an embodiment of the invention, for each pixel in the group, the pixel output control signal uses a first preset signal (e.g., "1") to indicate that the current low gray scale value is displayed, and uses a second preset signal (e.g., "0") to indicate that the current low gray scale value is not displayed. And realizing the effect of pixel dispersed display by setting the pixel display lookup table to a certain degree. For example, the following is a partial image with a gray scale of 2, 4 x 4:
Line0：2，2，2，2，
Line1：2，2，2，2
Line2：2，2，2，2，
Line3：2，2，2，2，
for the above image, the corresponding pixel display look-up table is shown in table 1.
TABLE 1 Pixel display lookup Table
As can be seen from the above table, according to the setting of the pixel display lookup table, the phenomenon that all pixels are simultaneously displayed and not simultaneously displayed does not occur in each group, so that the uniformity of the gray scale of the image is ensured, and the display effect of the image is also ensured.
Step S2, it is determined whether the image data of the current frame is low grayscale data.
Specifically, for the image data of the current frame to be displayed, it is first determined whether it belongs to low gray data. In the present invention, data processing is performed only on low-grayscale data. For high gradation data, when the data is displayed for each group, the gradation value of the pixel is displayed, so that the data processing is not performed. Preferably, the average of the high gray data with respect to the number of packets is displayed at each position of each packet.
In an embodiment of the present invention, determining whether the image data of the current frame is low gray scale data includes the following steps:
21) and comparing the gray value of the image data of the current frame with a preset threshold value.
Preferably, the preset threshold is half of the product of the number of packets of the image data of the current frame and the non-scattering threshold. For example, when the number of packets is 8 and the non-scattering threshold is 4, the preset threshold may be set to 8 × 4/2 — 16.
22) When the gray value is smaller than the preset threshold value, determining that the gray value is low gray data; otherwise, it is determined as high gradation data.
And step S3, for the image data of the low gray scale data, searching the corresponding pixel output control signal in the pixel display lookup table according to the current low gray scale value, the current grouping and the current position.
Specifically, when the image data of the current frame is determined to be low gray scale data, and when each group is displayed, the corresponding pixel output control signal is searched in the pixel display lookup table according to the current low gray scale value, the current group and the current position. Preferably, the position may be expressed in terms of a row position or a column position, so that a pixel output control signal of a certain row/column in a certain group is looked up.
In an embodiment of the present invention, the count of the current packet is obtained through a packet counter, so as to display the current packet one by one. For example, when the number of packets is 8, the packet counter sequentially counts in the order of 0 to 7. Meanwhile, the count of the current row position/column position is obtained by a row/column counter which performs cycle counting once every other group. For example, when the number of rows is 4 rows, the row counter counts cyclically in the order of 0 to 3.
And step S4, displaying a corresponding gray value at the current position of the current group according to the pixel output control signal.
Specifically, the gradation display at the current position of the current group is controlled according to the searched pixel output control signal. As for the partial image with the gray scale of 2, 4 x 4, the pixel output control information bit 1000 in the first row of the group 0 can be found according to table 1, indicating that the display is performed at the pixel 0 and the display is not performed at the pixel 1/2/3. The first row of packet 0 corresponds to a display gray scale value of 2000. Therefore, the resulting pixel display results for each group are shown in table 2.
TABLE 2 Pixel display results
As shown in FIG. 3, in one embodiment, the data processing system of the present invention includes a creating module 31, a determining module 32, a searching module 33 and a displaying module 34.
The creating module 31 is configured to create a pixel display lookup table corresponding to a low gray scale value, a group, and a position; the pixel display look-up table is used to store pixel output control signals for different low gray scale values at various locations of various groups.
The determining module 32 is configured to determine whether the image data of the current frame is low grayscale data.
The searching module 33 is connected to the creating module 31 and the determining module 32, and configured to search the image data of the low gray scale data for a corresponding pixel output control signal in the pixel display lookup table according to the current low gray scale value, the current group, and the current position.
The display module 34 is connected to the search module 33, and configured to display a corresponding gray value at the current position of the current group according to the pixel output control signal.
The structures and principles of the creating module 31, the determining module 32, the searching module 33 and the displaying module 34 correspond to the steps in the data processing method one by one, and thus are not described herein again.
It should be noted that the division of the modules of the above apparatus is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the x module may be a processing element that is set up separately, or may be implemented by being integrated in a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and the function of the x module may be called and executed by a processing element of the apparatus. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.
For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
The storage medium of the present invention has stored thereon a computer program which, when executed by a processor, implements the data processing method described above. The storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic disk, U-disk, memory card, or optical disk.
As shown in fig. 4, in an embodiment, the terminal of the present invention includes: a processor 41 and a memory 42.
The memory 42 is used for storing computer programs.
The memory 42 includes: various media that can store program codes, such as ROM, RAM, magnetic disk, U-disk, memory card, or optical disk.
The processor 41 is connected to the memory 42, and is configured to execute the computer program stored in the memory 42, so that the terminal executes the travel mode reminding method.
Preferably, the Processor 41 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components.
In summary, the data processing method and system, the storage medium, and the terminal of the present invention can dispersedly display the gray level values of the pixels in different groups for the pixels with low gray level values; the uniformity of the image gray scale is ensured, and the condition that no image is displayed on a certain group in a frame of image and all pixels on the certain group are displayed is effectively avoided; the image display effect is improved. Therefore, the invention effectively overcomes the defects in the prior art and has practicability.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (8)
1. A data processing method, characterized by: the method comprises the following steps:
creating a pixel display lookup table corresponding to low gray value, grouping and position; the pixel display lookup table is used for storing pixel output control signals of different low gray scale values at each position of each group; the pixel display lookup table dispersedly displays the low gray values at different positions of different groups;
judging whether the image data of the current frame is low-gray-scale data or not;
for the image data of the low gray data, searching a corresponding pixel output control signal in the pixel display lookup table according to the current low gray value, the current group and the current position;
displaying a corresponding gray value at the current position of the current packet according to the pixel output control signal;
the method for judging whether the image data of the current frame is low-gray-scale data comprises the following steps:
comparing the gray value of the image data of the current frame with a preset threshold value;
when the gray value is smaller than the preset threshold value, determining that the gray value is low gray data; otherwise, judging as high-gray data; the preset threshold is half of the product of the number of groups of the image data of the current frame and the non-scattering threshold.
2. The data processing method of claim 1, wherein: and aiming at each pixel in the group, adopting a first preset signal to represent that the current low gray scale value is displayed in the pixel output control signal, and adopting a second preset signal to represent that the current low gray scale value is not displayed.
3. The data processing method of claim 1, wherein: and acquiring the count of the current packet through a packet counter.
4. The data processing method of claim 1, wherein: the position is either a row position or a column position.
5. The data processing method of claim 4, wherein: the count of the current row/column position is obtained by a row/column counter that performs a cycle count every other packet.
6. A data processing system characterized by: the device comprises a creating module, a judging module, a searching module and a display module;
the creation module is used for creating a pixel display lookup table corresponding to low gray scale values, groups and positions; the pixel display look-up table is used for storing pixel output control signals of different low gray scale values at each position of each group; the pixel display lookup table dispersedly displays the low gray values at different positions of different groups;
the judging module is used for judging whether the image data of the current frame is low-gray-scale data;
the searching module is used for searching the corresponding pixel output control signal in the pixel display searching table according to the current low gray value, the current group and the current position for the image data of the low gray data;
the display module is used for displaying a corresponding gray value on the current position of the current group according to the pixel output control signal;
the judging module for judging whether the image data of the current frame is low-gray-scale data comprises the following steps:
comparing the gray value of the image data of the current frame with a preset threshold;
when the gray value is smaller than the preset threshold value, determining that the gray value is low gray data; otherwise, judging the data to be high-gray data; the preset threshold is half of the product of the number of groups of the image data of the current frame and the non-scattering threshold.
7. A storage medium on which a computer program is stored, which computer program, when executed by a processor, implements the data processing method of any one of claims 1 to 5.
8. A terminal, comprising: a processor and a memory;
the memory is used for storing a computer program;
the processor is configured to execute the computer program stored in the memory to cause the terminal to perform the data processing method of any one of claims 1 to 5.
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| CN111489689A (en) * | 2020-04-29 | 2020-08-04 | 四川遂宁市利普芯微电子有限公司 | Display data transmission method |
| CN111653235A (en) * | 2020-07-16 | 2020-09-11 | 中科芯集成电路有限公司 | LED driving chip display control distributed PWM algorithm |
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