CN112309312A - Image display method and device, receiving card, sending card and LED display system - Google Patents
Image display method and device, receiving card, sending card and LED display system Download PDFInfo
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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
- G09G3/22—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]
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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
- G09G3/2003—Display of colours
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
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Abstract
The embodiment of the invention discloses an image display method and device, a receiving card, a sending card and an LED display system. The image display method includes: receiving a color gamut parameter value, and acquiring a standard color gamut corresponding to the color gamut parameter value; obtaining chromaticity coordinates of a target display screen and generating an original color gamut of the target display screen according to the chromaticity coordinates; generating a color gamut conversion coefficient of the target display screen according to the standard color gamut and the original color gamut; acquiring an image to be displayed; performing color gamut conversion processing on the image to be displayed according to the original color gamut and the color gamut conversion coefficient to obtain a processed image; and outputting the processed image to the target display screen for display. The embodiment of the invention can effectively solve the problems of inconsistent chromaticity and poor display quality of the existing LED display screen.
Description
Technical Field
The present invention relates to the field of image display technologies, and in particular, to an image display method, an image display apparatus, a receiving card, a transmitting card, and an LED display system.
Background
The existing LED display screens need to be subjected to color gamut correction before being used, and the existing method for performing color gamut correction on the LED display screens is to select one LED display screen from a batch of LED display screens as a correction target display screen, and perform color gamut correction on other LED display screens according to the correction target display screen.
The existing color gamut correction method has the following defects: on the one hand, since the color gamut range of the correction target display screen is small, and the color gamut range of the video image conforming to the existing color gamut standard is larger, the LED display screen corrected by the existing method may deteriorate the color, vividness and image quality of the video image when displaying the video image.
Disclosure of Invention
Therefore, the embodiment of the invention provides an image display method, an image display device, a receiving card, a sending card and an LED display system, and effectively solves the problems of inconsistent chromaticity and poor display quality of the existing LED display screen.
In one aspect, an image display method provided in an embodiment of the present invention includes: a standard color gamut obtaining step: receiving a color gamut parameter value, and acquiring a standard color gamut corresponding to the color gamut parameter value; an original color gamut generating step: obtaining chromaticity coordinates of a target display screen and generating an original color gamut of the target display screen according to the chromaticity coordinates; a conversion coefficient generation step: generating a color gamut conversion coefficient of the target display screen according to the standard color gamut and the original color gamut; an image acquisition step: acquiring an image to be displayed; an image processing step: performing color gamut conversion processing on the image to be displayed according to the original color gamut and the color gamut conversion coefficient to obtain a processed image; image output and display step: and outputting the processed image to the target display screen for display.
The technical scheme has the following advantages or beneficial effects: the color gamut of the LED display screen is corrected by adopting the standard color gamut which meets the specific color gamut standard, and the appropriate standard color gamut can be selected according to the display requirement of the LED display screen, so that the color gamut of the LED display screens in different batches is calibrated identically, and the color gamut of the LED display screen contains more colors and can display more colors due to the adoption of the standard color gamut for calibration, so that the color chroma and the vividness of the LED display screen are improved, and the display image quality is improved; meanwhile, the color gamut correction process is executed in the same hardware, so that the timeliness of color gamut correction is improved.
In one embodiment, the image processing step comprises: displaying the image to be displayed according to the original color gamut to obtain an image to be corrected; caching the image to be corrected; performing pixel-by-pixel color gamut correction on the image to be corrected according to the color gamut conversion coefficient to obtain the processed image; the image output and processing step comprises: and outputting the processed image to the target display screen for display pixel by pixel.
In the embodiment of the disclosure, the color gamut conversion of the image to be displayed is performed pixel by pixel, and the processed image is output and displayed pixel by pixel, so that the conversion precision of the color gamut conversion of the image to be displayed is ensured, and the display quality of the image is further improved.
In one embodiment, the conversion coefficient generating step further includes: storing the color gamut conversion coefficient of the target display screen.
According to the embodiment of the disclosure, the color gamut conversion coefficient is stored, and the LED display screen does not need to be corrected for the second time in later use.
In one embodiment, the image display method further includes: and a brightness and chrominance correction step, namely performing point-by-point brightness and chrominance correction on the target display screen.
The disclosed embodiments further improve the chromaticity and brightness of the LED display screen display by performing a per-dot chromaticity correction before or after the image display method is performed, preferably before the image display method.
In another aspect, an embodiment of the present invention provides an image display apparatus, including: the standard color gamut acquisition module is used for receiving the color gamut parameter value and acquiring a standard color gamut corresponding to the color gamut parameter value; the original color gamut generating module is used for acquiring chromaticity coordinates of a target display screen and generating an original color gamut of the target display screen according to the chromaticity coordinates; the conversion coefficient generating module is used for generating a color gamut conversion coefficient of the target display screen according to the standard color gamut and the original color gamut; the image acquisition module is used for acquiring an image to be displayed; the image processing module is used for carrying out color gamut conversion processing on the image to be displayed according to the original color gamut and the color gamut conversion coefficient to obtain a processed image; and the image output and display module is used for outputting the processed image to the target display screen for display.
On the other hand, an embodiment of the present invention provides a receiving card, including: the programmable logic device is electrically connected with the nonvolatile memory; wherein the programmable logic device is to: the method comprises the steps of carrying out point-by-point brightness chromaticity correction on a target display screen, receiving color gamut parameter values, obtaining a standard color gamut corresponding to the color gamut parameter values from a plurality of standard color gamuts stored in a nonvolatile memory, obtaining chromaticity coordinates of the target display screen, generating an original color gamut of the target display screen according to the chromaticity coordinates, generating a color gamut conversion coefficient of the target display screen according to the standard color gamut and the original color gamut, obtaining an image to be displayed, carrying out color gamut conversion processing on the image to be displayed according to the original color gamut and the color gamut conversion coefficient to obtain a processed image, and outputting the processed image to the target display screen.
On the other hand, an embodiment of the present invention provides a transmitting card, including: the programmable logic device is connected with the nonvolatile memory; wherein the programmable logic device is to: the method comprises the steps of receiving color gamut parameter values, obtaining a standard color gamut corresponding to the color gamut parameter values from a plurality of standard color gamuts stored in a nonvolatile memory, obtaining chromaticity coordinates of a target display screen, generating an original color gamut of the target display screen according to the chromaticity coordinates, generating a color gamut conversion coefficient of the target display screen according to the standard color gamut and the original color gamut, obtaining an image to be displayed, performing color gamut conversion processing on the image to be displayed according to the original color gamut and the color gamut conversion coefficient to obtain a processed image, and outputting the processed image to the target display screen.
In another aspect, an LED display system provided in an embodiment of the present invention includes: sending the card; the receiving card is connected with the sending card; and the LED display screen is connected with the receiving card.
In another aspect, an embodiment of the present invention provides an LED display system, including: a transmitting card as described above; the receiving card is connected with the sending card; and the LED display screen is connected with the receiving card.
One technical scheme of the technical scheme has the following advantages or beneficial effects: the method has the advantages that the color gamut correction can be carried out on the LED display screen by adopting the uniform standard color gamut, the display image quality of the LED display screen is improved, the LED display screen can fully display images with higher image quality, the display effect is improved, meanwhile, the method can be applied to the sending card and/or the receiving card, and the application scenes are more.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart illustrating an image display method according to a first embodiment of the present invention.
Fig. 2 is a schematic diagram of the architecture of the candidate standard color gamut in the first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of the gamut conversion coefficients generated in the first embodiment of the present invention.
Fig. 4 is a flowchart illustrating an image display method according to a first embodiment of the present invention.
Fig. 5 is a schematic diagram of an image display device according to a second embodiment of the present invention.
Fig. 6 is a schematic view of another architecture of an image display device according to a second embodiment of the present invention.
Fig. 7 is a schematic diagram of a receiving card according to a third embodiment of the present invention.
Fig. 8 is a schematic diagram of a transmitting card according to a fourth embodiment of the present invention.
Fig. 9 is a schematic diagram of an LED display system according to a fifth embodiment of the present invention.
Fig. 10 is a schematic diagram of an LED display system according to a sixth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
[ first embodiment ] A method for manufacturing a semiconductor device
Referring to fig. 1, an image display method according to a first embodiment of the present invention includes the following steps:
a standard color gamut obtaining step S1, obtaining color gamut parameter values, and obtaining a standard color gamut according to the color gamut parameter values. The standard color gamut is selected from one or more of BT601 standard color gamut, bt.709 standard color gamut, BT2020 standard color gamut, sRGB standard color gamut, AdobeRGB standard color gamut, DCI-P3 standard color gamut, PAL standard color gamut, or NTSC standard color gamut, for example.
In one embodiment, for example, by operating the upper computer software, the upper computer software responds to a user operation instruction to send a color gamut parameter value to a receiving card or a sending card, the receiving card or the sending card selects one standard color gamut from a plurality of standard color gamuts to be selected stored in the nonvolatile memory, and the plurality of standard color gamuts to be selected are stored in the nonvolatile memory in advance, for example, the standard color gamut is color gamut data corresponding to the standard color gamut.
Referring to fig. 2, the standard color gamut is, for example, an sRGB standard color gamut, which is, for example, expressed by red chromaticity coordinates R, green chromaticity coordinates G, and blue chromaticity coordinates B, where R is, for example, expressed by the maximum chromaticity or color value of red that can be displayed by the sRGB standard color gamut, G is, for example, expressed by the maximum chromaticity or color value of green that can be displayed by the sRGB standard color gamut, and B is, for example, expressed by the maximum chromaticity or color value of blue that can be displayed by the sRGB standard color gamut, a triangular region RGB composed of R, G and B is, for example, used to express color gamut data of the sRGB standard color gamut, which is chromaticity data or color value data of all colors that can be combined in the ranges of R chromaticity coordinates, G chromaticity coordinates, and B chromaticity coordinates, where one of the chromaticity data or one of the color data corresponds to one color, for example, a mixed color, for example, a color is represented as aabbcc, where aa represents the red chroma value of the color, bb represents the green chroma value of the color, and cc represents the blue chroma value of the color; the standard color gamut is, for example, a set of a plurality of colors. The other standard color gamut is expressed in the same manner as the sRGB standard color gamut, for example, and differs from the sRGB standard color gamut in, for example, R chromaticity coordinates and/or G chromaticity coordinates and/or B chromaticity coordinates.
And an original color gamut generating step S2, taking an LED display screen that needs to be subjected to color gamut correction as a target display screen, obtaining chromaticity coordinates of the target display screen, and generating an original color gamut of the target display screen according to the chromaticity coordinates. Referring to FIG. 3, chromaticity coordinates of the target display screen include, for example, red chromaticity coordinates R1Green chromaticity coordinate G1And blue chromaticity coordinate B1For example, the maximum color value or chroma value of red that the target display screen can display is taken as R1Taking the maximum color value or chromatic value of green that can be displayed by the target display screen as G1Taking the maximum color value or chromatic value of blue that the target display screen can display as B1For example, mixing R1、G1And B1Formed triangular region R1G1B1The original color gamut is used for representing an original color gamut of a target display screen, where the original color gamut is chromaticity data or color value data of all colors that the target display screen can display in the range of R chromaticity coordinates, G chromaticity coordinates and B chromaticity coordinates of the target display screen, and the original color gamut is represented in the same manner as the standard color gamut, for example, see the detailed description of the above embodiments, and will not be described here.
In one embodiment, for example, further comprising obtaining a luminance coefficient of the target display screen, for example, at the time of obtainingRed chromaticity coordinate R1Then, R is obtained1The maximum luminance that can be displayed serves as the luminance coefficient of the chromaticity coordinates of red, and the resulting original color gamut further includes the luminance coefficient of each color in the original color gamut.
A conversion coefficient generating step S3 of generating a color gamut conversion coefficient of the target display screen based on the standard color gamut obtained in step S1 and the original color gamut obtained in step S2.
Referring to fig. 3, the standard color gamut obtained in step S1 is, for example, a triangle as shown by RGB in fig. 3, and the original color gamut obtained in step S2 is, for example, R in fig. 31G1B1A triangle as shown, the gamut conversion factor maps, for example, one color in the original gamut to a corresponding one color in the standard gamut, thereby enabling the target display screen to display colors in accordance with the standard gamut. The gamut conversion coefficients are, for example, matrix conversion coefficients.
In one embodiment, the process of mapping one color in the original color gamut to a corresponding one color in the standard color gamut is, for example: obtaining the red chromaticity coordinate R of the original color gamut1Corresponding red stimulus value, green chromaticity coordinate G1Corresponding green stimulus value and blue chromaticity coordinate B1Corresponding to the blue stimulus value; mixing and representing each color in the obtained original color gamut according to the red stimulus value, the green stimulus value and the blue stimulus value, namely representing each color in the original color gamut in a three-color stimulus value mode; the same operation is performed for the standard color gamut, which is not described in detail herein; obtaining the red stimulus value proportion of the red stimulus value of the original color gamut and the red stimulus value of the standard color gamut, the green stimulus value proportion of the green stimulus value of the original color gamut and the green stimulus value of the standard color gamut and the blue stimulus value proportion of the blue stimulus value of the original color gamut and the blue stimulus value proportion of the blue stimulus value of the standard color gamut, obtaining the color gamut conversion value of each color in the original color gamut according to the three stimulus value proportions, the tristimulus value representation mode of each color in the original color gamut and the tristimulus value representation mode of each color in the standard color gamut, and combining the color gamut conversion values of each color in the original color gamutAnd the color gamut conversion coefficient.
In one embodiment, for example, the method further comprises storing the obtained color gamut conversion coefficients in a memory, such as a non-volatile memory, for example, the color gamut conversion coefficients are specific to the target display screen, so that the sending card or the receiving card only needs to perform color gamut correction once in use, and does not need to perform color gamut correction multiple times on a standard color gamut.
An image acquisition step S4 acquires an image to be displayed. For example, receiving image data sent by an upper computer, wherein the image data is an image to be displayed; the image to be displayed is, for example, a video image.
And an image processing step S5, performing color gamut conversion processing on the image to be displayed obtained in the step S4 according to the original color gamut obtained in the step S2 and the color gamut conversion coefficient obtained in the step S3 to obtain a processed image.
Referring to fig. 4, in an embodiment, the image to be displayed obtained in step S4 is subjected to display processing according to the original color gamut obtained in step S2, so as to obtain an image to be corrected. For example, the image to be displayed is processed according to the original color gamut, and the display process is, for example, to display the image to be displayed according to the original color gamut, but the image to be displayed is further processed in a receiving card or a sending card and thus is not output and displayed on the LED display screen, that is, the image to be displayed is processed according to the original color gamut, that is, each pixel in the image to be displayed is represented according to the original color gamut; buffering the image to be corrected, for example, storing the image to be corrected in a volatile memory; reading the image to be corrected pixel by pixel, and correcting the chromaticity of the pixel according to the color gamut conversion coefficient obtained in step S3, for example, correcting the luminance of the pixel to obtain a processed image.
An image output and display step S6, wherein the processed image obtained in the step S5 is output to the target display screen, so that the target display screen displays the processed image.
In one embodiment, for example, in step S5, the chromaticity of the image to be corrected is corrected pixel by pixel, and after the chromaticity is corrected pixel by pixel, the image is outputted to the target display screen pixel by pixel, so that the target display screen displays the processed image.
In one embodiment, the image processing method further comprises:
a luminance and chrominance correction step S0, which performs a luminance and chrominance correction for the target display screen on a dot-by-dot basis. The step S0 is performed before step S1 or after step S1, or after step S3, for example. For example, a target image, such as a detection image, for example, a red image, a blue image, or a green image, is displayed on a target display screen, and then the chromaticity and the luminance of the target image displayed on the target display screen are corrected on a pixel-by-pixel basis.
In the process of collecting the original color gamut of the target display screen, it is required to ensure that the collected chromaticity coordinates have representative significance, but when the LED display screen is not subjected to point-by-point brightness chromaticity correction, the chromaticity of the target display screen has larger difference, especially for multiple batches of display screens. For example, the lighting-by-lighting chromaticity correction is performed before the original color gamut generation step S2.
On the other hand, the point-by-point chromaticity correction can change the color space attribute of the target display screen, so that the step S2 and the step S3 need to be performed after the target display screen is subjected to the point-by-point chromaticity correction once and then image display is performed. However, the point-by-point brightness correction does not change the color properties of the target display screen, and thus the image display can be performed without performing the step S2 and the step S3 after the LED point-by-point brightness correction.
In summary, the image display method provided in this embodiment: on one hand, various standard color gamuts can be provided for the target display screen to perform different color gamut corrections on the target display screen, and as the standard color gamuts are larger, and most of the existing video images are shot according to the standard color gamuts, the target display screen can improve the color, the vividness and the display image quality of the video images; on one hand, a color management process is operated in one device, and user operation is not needed or executed in the color management process, for example, a user inputs the chromaticity coordinates of the target display screen and/or uploads the color gamut conversion coefficients, and the color management comprises an original color gamut generation step and a conversion coefficient generation step; in another aspect, the lighting-by-lighting chromaticity correction process may be performed before or after the color management, and the image display method may be performed on a transmitting card when the lighting-by-lighting chromaticity correction process is performed after the color management, without being limited to a hardware platform.
[ second embodiment ]
Fig. 5 is a schematic structural diagram of an image display device according to a second embodiment of the present invention. The image display device 10 includes, for example:
the standard color gamut obtaining module 11 is, for example, configured to receive the color gamut parameter value and obtain a standard color gamut corresponding to the color gamut parameter value.
In one embodiment, the standard color gamut obtaining module 11 is, for example, integrated in an FPGA (Programmable logic device), for example, the FPGA receives color gamut parameter values, for example, the color gamut parameter values are sent to the FPGA by an upper computer, for example, a computer; after obtaining the color gamut parameter values, the FPGA reads the corresponding standard color gamut stored in the nonvolatile memory according to the color gamut parameter values, where the nonvolatile memory stores a plurality of standard color gamuts, for example, the standard color gamut is described in detail in the above first embodiment and is not described here.
The original color gamut generating module 13 is configured to, for example, obtain chromaticity coordinates of a target display screen, and generate an original color gamut of the target display screen according to the chromaticity coordinates.
In one embodiment, the original color gamut generating module 13 is integrated in an FPGA, for example, to implement the process, and the detailed process is referred to the above first embodiment and will not be described here.
The color gamut conversion coefficient generating module 15 is configured to generate a color gamut conversion coefficient of the target display screen according to the standard color gamut and the original color gamut, for example. The detailed process is referred to the first embodiment and will not be described here.
In one embodiment, the gamut conversion coefficient generating module 15 is further configured to store the gamut conversion coefficients, for example. The detailed process is referred to the first embodiment and will not be described here.
The image obtaining module 16 is, for example, configured to obtain an image to be displayed. For example, the image acquisition module 16 is a data input interface, and receives an image to be displayed, which is sent by an upper computer, through the image acquisition module 16.
The image processing module 17 is, for example, configured to perform color gamut conversion processing on the image to be displayed according to the original color gamut and the color gamut conversion coefficient to obtain a processed image. The detailed process is referred to the first embodiment and will not be described here.
Referring to fig. 6, in one embodiment, the image processing module 17 includes, for example:
the first processing unit 171 is, for example, configured to perform display processing on the image to be displayed according to the original color gamut to obtain an image to be corrected.
The buffer unit 173 is used, for example, for buffering the image to be corrected. For example, the image processing module 17 is integrated in an FPGA, and the buffer unit buffers the image to be corrected in a volatile memory by controlling a memory read control module of the FPGA.
The second processing unit 175 is, for example, configured to perform pixel-by-pixel color gamut conversion processing on the image to be corrected according to the color gamut conversion coefficient to obtain a processed image.
The image output and processing display module 19 is, for example, configured to output the processed image to the target display screen for display on a pixel-by-pixel basis.
Referring to fig. 6, in one embodiment, the image output and processing display module 19 outputs the processed image to the target display screen for display on a pixel-by-pixel basis while the second processing unit 175 performs the color gamut conversion processing on a pixel-by-pixel basis, for example, after the second processing unit 175 performs the color gamut conversion processing on a pixel, the image output and processing display module 19 outputs the pixel subjected to the color gamut conversion processing.
Referring to fig. 6, the image display device 10 further includes, for example:
the luminance and chrominance correction module 12 is, for example, configured to perform a luminance and chrominance correction on the target display screen point by point. The detailed process is referred to the first embodiment and will not be described here.
In one embodiment, the image processing apparatus 10 is, for example, an FPGA, which is integrated with a standard gamut acquisition module 11, an original gamut generation module 13, a conversion coefficient generation module 15, an image acquisition module 16, an image processing module 17, and an image output and processing module 19; the FPGA is also integrated with, for example, a memory read control module and a luminance and chrominance correction module 12.
[ third embodiment ]
Referring to fig. 7, a schematic structural diagram of a receiving card according to a third embodiment of the present invention is shown. The receiving card 20 includes, for example, a programmable logic device 21 and a nonvolatile memory 22 electrically connected to the programmable logic device, and the nonvolatile memory 22 is, for example, FLASH.
The programmable logic device 21 is configured to perform per-dot luminance chromaticity correction on a target display screen, receive color gamut parameter values, obtain a standard color gamut corresponding to the color gamut parameter values from a plurality of standard color gamuts stored in the nonvolatile memory 22, obtain chromaticity coordinates of the target display screen, generate an original color gamut of the target display screen according to the chromaticity coordinates, generate a color gamut conversion coefficient of the target display screen according to the standard color gamut and the original color gamut, obtain an image to be displayed, perform color gamut conversion processing on the image to be displayed according to the original color gamut and the color gamut conversion coefficient to obtain a processed image, and output the processed image to the target display screen. The detailed process is referred to the first and second embodiments and will not be described here.
The nonvolatile memory 22 is used for storing a plurality of the standard color gamuts and the color gamut conversion coefficients, for example.
In one embodiment, the programmable logic device 21 is further configured to process the image to be displayed according to the original color gamut to obtain an image to be corrected, for example; caching the image to be corrected; and processing the image to be corrected according to the color gamut conversion coefficient, and performing pixel-by-pixel processing to obtain a processed image.
In one embodiment, the programmable logic device 21 receives, for example, the transmitted standard color gamut parameters.
In one embodiment, the receiving card 20 further comprises, for example, a microcontroller electrically connected to the programmable logic device 21 and a volatile memory electrically connected to the programmable logic device 21. The microcontroller is, for example, an MCU, and is configured to connect to an upper computer, and generate the standard color gamut parameter according to an instruction sent by the upper computer, for example, the microcontroller sends the standard color gamut parameter to the FPGA, and the upper computer is, for example, a sending card; the volatile memory is, for example, an SDRAM, and is used for buffering the image to be corrected obtained by the programmable logic device 21.
[ fourth example ] A
Referring to fig. 8, a schematic structural diagram of a transmitting card according to a fourth embodiment of the present invention is shown. The transmitting card 30 includes, for example, a programmable logic device 31 and a nonvolatile memory 32 electrically connected to the programmable logic device, and the nonvolatile memory 32 is, for example, FLASH.
The programmable logic device 31 is configured to receive color gamut parameter values, obtain a standard color gamut corresponding to the color gamut parameter values from a plurality of standard color gamuts stored in the nonvolatile memory, obtain chromaticity coordinates of a target display screen, generate an original color gamut of the target display screen according to the chromaticity coordinates, generate a color gamut conversion coefficient of the target display screen according to the standard color gamut and the original color gamut, obtain an image to be displayed, perform color gamut conversion processing on the image to be displayed according to the original color gamut and the color gamut conversion coefficient to obtain a processed image, and output the processed image to the target display screen.
The nonvolatile memory 32 is used for storing a plurality of the standard color gamuts and the color gamut conversion coefficients, for example.
In one embodiment, the programmable logic device 31 is further configured to process the image to be displayed according to the original color gamut to obtain an image to be corrected, for example; caching the image to be corrected; and processing the image to be corrected according to the color gamut conversion coefficient, and performing pixel-by-pixel processing to obtain a processed image.
In one embodiment, the programmable logic device 31 receives, for example, standard color gamut parameters sent by an upper computer, such as a computer.
In one embodiment, the transmitter card 30 further includes, for example, a microcontroller electrically connected to the programmable logic device 31 and a volatile memory electrically connected to the programmable logic device 31. The microcontroller is, for example, configured to connect an upper computer, for example, a computer device, and generate the color gamut standard parameter according to an instruction sent by the upper computer, and the microcontroller sends the color gamut standard parameter to the programmable logic device 31, for example; the volatile memory is used, for example, to buffer the image to be corrected obtained by the programmable logic device 31.
[ fifth embodiment ]
Fig. 9 is a schematic structural diagram of an LED display system according to a fifth embodiment of the present invention. The LED display system 50 includes, for example: a transmitting card 51, such as the receiving card 20 of the third embodiment, and an LED display screen 52.
The sending card 51 is connected with the receiving card 20, and the receiving card 20 is connected with the LED display screen 52. For example, the sending card 51 is connected to the receiving card 20 through a network cable, and the receiving card 20 is connected to the LED display screen 52 through a network cable.
In one embodiment, the LED display system 50 has, for example, a plurality of receiving cards 20, the LED display screen 52 has, for example, a plurality of LED light boxes 521, the sending card 51 is connected to the plurality of receiving cards 20 through a network cable, one receiving card 20 is connected to one LED light box 521, and one receiving card 20 can also be connected to another receiving card 20 through a network cable.
In one embodiment, the LED display system 50 is implemented, for example, by: the receiving card 20 performs per-dot brightness and chrominance correction on the LED display screen 52 connected with the receiving card; the transmitting card 51 transmits, for example, the color gamut standard parameter to the receiving card 20; the receiving card 20 receives the color gamut standard parameters, performs color gamut correction on the connected LED display screen 52 to obtain a color gamut conversion coefficient, and stores the color gamut conversion coefficient in the receiving card 20, and the receiving card 20 obtains the original color gamut of the connected LED display screen 52 at the same time; the transmitting card 51 transmits an image to be displayed to the receiving card 20; the receiving card 20 receives the image to be displayed, performs color gamut conversion processing on the image to be displayed pixel by pixel according to the original color gamut and the color gamut conversion coefficient, and outputs the processed image pixel by pixel; the LED display screen 52 receives and displays the processed image pixel by pixel.
In an actual scene, the LED display screen 52 is a screen with a large area, when the LED display screen 52 includes a plurality of LED lamp boxes 521, one of the LED lamp boxes 521 is, for example, regarded as an LED display screen with a small display area, one receiving card 20 is connected to one of the LED lamp boxes 521, and the receiving card 20 performs color gamut correction on the LED lamp box 521 connected thereto and stores a color gamut correction coefficient of the LED lamp box 521.
[ sixth embodiment ]
Referring to fig. 10, a schematic structural diagram of another LED display system according to a sixth embodiment of the present invention is shown. The LED display system 70 includes, for example: a transmitting card 30, a receiving card 71 and an LED display screen 72 according to the fourth embodiment.
The sending card 30 is connected with the receiving card 71, and the receiving card 71 is connected with the LED display screen 72. For example, the transmitting card 30 is connected to a plurality of receiving cards 70 through network cables, and one receiving card 70 is connected to one LED display screen 72 through network cables.
In one embodiment, the LED display system 70 has, for example, a plurality of receiving cards 71, the LED display screen 72 has, for example, a plurality of LED light boxes 721, the sending card 30 is connected to the plurality of receiving cards 71 through, for example, a network cable, one receiving card 71 is connected to one of the LED light boxes 721, and one receiving card 71 can be connected to another receiving card 71 through a network cable.
In one embodiment, the LED display system 70 is implemented, for example, by: the sending card 30 receives a standard obtaining command sent by an upper computer, for example, a computer, the sending card 30 performs color gamut correction on the LED display screen 72 connected thereto according to the standard obtaining command to obtain a color gamut conversion coefficient, and stores the color gamut conversion coefficient in the sending card 30, and the sending card 30 obtains the original color gamut of the LED display screen 72 connected thereto at the same time; the receiving card 71 performs per-dot brightness and chromaticity correction on the LED display screen 72 connected with the receiving card; the sending card 51 receives an image to be displayed sent by an upper computer, processes the image to be displayed pixel by pixel according to the original color gamut and the color gamut conversion coefficient, and outputs the processed image pixel by pixel; the receiving card 71 receives the processed image pixel by pixel and sends the processed image to the LED display screen 72 connected with the receiving card; the LED display screen 72 displays the processed image pixel by pixel.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit is merely a division of one logic function, and an actual implementation may have another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (12)
1. An image display method, comprising
A standard color gamut obtaining step: receiving a color gamut parameter value, and acquiring a standard color gamut corresponding to the color gamut parameter value;
an original color gamut generating step: obtaining chromaticity coordinates of a target display screen and generating an original color gamut of the target display screen according to the chromaticity coordinates;
a conversion coefficient generation step: generating a color gamut conversion coefficient of the target display screen according to the standard color gamut and the original color gamut;
an image acquisition step: acquiring an image to be displayed;
an image processing step: performing color gamut conversion processing on the image to be displayed according to the original color gamut and the color gamut conversion coefficient to obtain a processed image;
image output and display step: and outputting the processed image to the target display screen for display.
2. The image display method according to claim 1,
the image processing step includes:
displaying the image to be displayed according to the original color gamut to obtain an image to be corrected;
caching the image to be corrected;
performing pixel-by-pixel color gamut correction on the image to be corrected according to the color gamut conversion coefficient to obtain the processed image;
the image output and processing step comprises: and outputting the processed image to the target display screen for display pixel by pixel.
3. The image display method according to claim 1, wherein the conversion coefficient generating step further comprises:
storing the color gamut conversion coefficient of the target display screen.
4. The image display method according to claim 1, further comprising:
and a brightness and chrominance correction step, namely performing point-by-point brightness and chrominance correction on the target display screen.
5. An image display apparatus, comprising:
the standard color gamut acquisition module is used for receiving the color gamut parameter value and acquiring a standard color gamut corresponding to the color gamut parameter value;
the original color gamut generating module is used for acquiring chromaticity coordinates of a target display screen and generating an original color gamut of the target display screen according to the chromaticity coordinates;
the conversion coefficient generating module is used for generating a color gamut conversion coefficient of the target display screen according to the standard color gamut and the original color gamut;
the image acquisition module is used for acquiring an image to be displayed;
the image processing module is used for carrying out color gamut conversion processing on the image to be displayed according to the original color gamut and the color gamut conversion coefficient to obtain a processed image;
and the image output and display module is used for outputting the processed image to the target display screen for display.
6. The image display device according to claim 5,
the image processing module includes:
the first processing unit is used for processing the image to be displayed according to the original color gamut to obtain an image to be corrected;
the buffer unit is used for buffering the image to be corrected;
and the second processing unit is used for performing pixel-by-pixel color gamut conversion processing on the image to be corrected according to the color gamut conversion coefficient to obtain a processed image.
The image output and processing module is used for outputting the processed image to the target display screen for displaying pixel by pixel.
7. The image display device according to claim 5,
the conversion coefficient generation module is further configured to store the color gamut conversion coefficient of the target display screen.
8. The image display device according to claim 5, further comprising:
and the brightness and chrominance correction module is used for performing point-by-point brightness and chrominance correction on the target display screen.
9. A receiving card comprising a programmable logic device and a non-volatile memory electrically connected to said programmable logic device;
wherein the programmable logic device is to: the method comprises the steps of carrying out point-by-point brightness chromaticity correction on a target display screen, receiving color gamut parameter values, obtaining a standard color gamut corresponding to the color gamut parameter values from a plurality of standard color gamuts stored in a nonvolatile memory, obtaining chromaticity coordinates of the target display screen, generating an original color gamut of the target display screen according to the chromaticity coordinates, generating a color gamut conversion coefficient of the target display screen according to the standard color gamut and the original color gamut, obtaining an image to be displayed, carrying out color gamut conversion processing on the image to be displayed according to the original color gamut and the color gamut conversion coefficient to obtain a processed image, and outputting the processed image to the target display screen.
10. A transmitter card, comprising: the programmable logic device is connected with the nonvolatile memory;
wherein the programmable logic device is to: the method comprises the steps of receiving color gamut parameter values, obtaining a standard color gamut corresponding to the color gamut parameter values from a plurality of standard color gamuts stored in a nonvolatile memory, obtaining chromaticity coordinates of a target display screen, generating an original color gamut of the target display screen according to the chromaticity coordinates, generating a color gamut conversion coefficient of the target display screen according to the standard color gamut and the original color gamut, obtaining an image to be displayed, performing color gamut conversion processing on the image to be displayed according to the original color gamut and the color gamut conversion coefficient to obtain a processed image, and outputting the processed image to the target display screen.
11. An LED display system, comprising:
sending the card;
the receiving card of claim 9, coupled to the sending card;
and the LED display screen is connected with the receiving card.
12. An LED display system, comprising:
a transmitter card as recited in claim 10;
the receiving card is connected with the sending card;
and the LED display screen is connected with the receiving card.
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| CN201910682594.1A CN112309312A (en) | 2019-07-26 | 2019-07-26 | Image display method and device, receiving card, sending card and LED display system |
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