CN105491363A - LED panel pixel correction method and apparatus - Google Patents
LED panel pixel correction method and apparatus Download PDFInfo
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- CN105491363A CN105491363A CN201510921211.3A CN201510921211A CN105491363A CN 105491363 A CN105491363 A CN 105491363A CN 201510921211 A CN201510921211 A CN 201510921211A CN 105491363 A CN105491363 A CN 105491363A
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- 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
- H04N9/646—Circuits for processing colour signals for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters
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- 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
- H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
- H04N9/69—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits for modifying the colour signals by gamma correction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
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Abstract
The invention discloses an LED panel pixel correction method and apparatus. The method comprises the following steps: receiving single-frame video data, wherein the single-frame video data is one frame of data in a video to be corrected; storing the single-frame video data to a dynamic memory; reading a correction data set and the single-frame video data from the dynamic memory, wherein the dynamic memory stores the correction data set in advance, and the correction data set comprises multiple correction arrays correcting multiple pixel points on an LED panel; and correcting the single-frame video data according to the correction data set. Through the LED panel pixel correction method and apparatus, the problem of incapability of performing pixel correction on a large-size high-density LED panel in related arts is solved.
Description
Technical field
The present invention relates to image processing field, in particular to a kind of light-emitting diode (LED) panel pixel bearing calibration and device.
Background technology
LED panel is encapsulated by single LED particle and forms, and each LED can send the light of RGB three kinds of colors, constitutes a light emitting pixel point in LED panel.Due to each there are differences of LED particle itself, such as brightness, the difference in colourity, have impact on brightness uniformity and the uniformity of chromaticity of whole Display panel, thus have impact on the display quality of image.In order to reduce the differentiation of LED particle light-emitting, introducing a kind of single-point pixel correction algorithm, by single-point pixel correction algorithm, improving the consistency in the brightness of every LED lamp particle light-emitting and colourity.Tradition LED display module due to pel spacing larger, single led display module pixel number is less, the data volume correcting array and video data is less, the complexity realizing pixel single point correction algorithm is lower, therefore, usually adopt static memory (SRAM) to store, can small-medium size be realized, such as, the high definition LED television module of 200 pixel × 100 pixels.But SRAM capacity is little, processing speed is lower, and cost is higher, along with LED is towards high density, Small Distance, high-resolution future development, if adopt SRAM to carry out pixel correction process to LED panel, cannot large scale be realized, such as, the pixel correction of the high definition LED panel of 1920 pixel × 1080 pixels.
For the problem cannot carrying out pixel correction in correlation technique to the highdensity LED panel of large scale, at present effective solution is not yet proposed.
Summary of the invention
Main purpose of the present invention is to provide a kind of LED panel pixel correction method and apparatus, to solve the problem cannot carrying out pixel correction in correlation technique to the highdensity LED panel of large scale.
To achieve these goals, according to an aspect of the present invention, a kind of LED panel pixel correction method is provided.The method comprises: receive single frame video data, single frame video data are the frame data in video to be corrected; Store single frame video data to dynamic memory; From dynamic memory, read correction data set and single frame video data, wherein, be previously stored with correction data set in dynamic memory, correction data set comprises multiple correction arrays pixel multiple in LED panel being performed to correction; And perform correction according to correction data set pair single frame video data.
Further, dynamic memory comprises the first dynamic memory and the second dynamic memory, single frame video data comprise adjacent one-frame video data and the second frame video data, store single frame video data to comprise to dynamic memory: store one-frame video data to the first dynamic memory successively, store the second frame video data to the second dynamic memory, correction data set is read and single frame video data comprise: read one-frame video data from the first dynamic memory successively from dynamic memory, the second frame video data is read from the second dynamic memory, wherein, while reading one-frame video data from the first dynamic memory, store the second frame video data to the second dynamic memory.
Further, multiple pixel comprises the first pixel and second pixel of ordinal selection, multiple correction array comprise the first pixel corresponding first correct array and the second pixel corresponding second correct array, single frame video data comprise the first pixel number certificate corresponding to the first pixel and the second pixel number certificate corresponding to the second pixel, read correction data set and single frame video data comprise from dynamic memory: read first and correct array and the first pixel number certificate; Judge whether the first correction array and the first pixel number certificate read complete; When first corrects array and the first pixel digital independent is complete, judge whether single frame video data read complete; And when single frame video data do not read complete, read second and correct array and the second pixel number certificate.
Further, dynamic memory comprises correction data memory block and video data storage region, correction data memory block is for storing correction data set, video data storage region is for storing single frame video data, and reading first corrects array and the first pixel number certificate comprises: the memory address that the first pixel is corresponding in correction data memory block reads first and corrects array; And the memory address that the first pixel is corresponding in video data storage region reads the first pixel number certificate.
Further, multiple pixel comprises the first pixel and second pixel of ordinal selection, multiple correction array comprise the first pixel corresponding first correct array and the second pixel corresponding second correct array, single frame video data comprise the first pixel number certificate corresponding to the first pixel and the second pixel number certificate corresponding to the second pixel, perform correction according to correction data set pair single frame video data to comprise: calculate the first pixel correction data corresponding to the first pixel by default correcting algorithm, wherein, preset correcting algorithm to be used for obtaining first pixel correction data to the first pixel number according to execution correction calculation according to the first correction array of reading, judge whether single frame video data correct complete, if single frame video data do not correct complete, calculate the second pixel correction data corresponding to the second pixel by default correcting algorithm, preset correcting algorithm and be used for obtaining second pixel correction data to the second pixel number according to execution correction calculation according to the second correction array of reading.
Further, correction data set prestores in a flash memory, and before reception single frame video data, the method also comprises: receive power-up initializing signal; In response to power-up initializing signal, the read operation of time for time interval startup flash memory is read with default unit, and the correction array read within the default unit reading time is stored to dynamic memory, wherein, presetting the unit time of reading is the time of reading correction array corresponding to LED panel lastrow pixel or correction array corresponding to LED panel previous column pixel in a flash memory; And the number of times of read operation is counted, when the number of times of read operation reaches default read operation number of times, terminate read operation, wherein, when the default unit time of reading is the time of reading correction array corresponding to LED panel lastrow pixel, preset the line number that read operation number of times is pixel in LED panel, when the unit time of reading is the time of reading correction array corresponding to LED panel previous column pixel, preset the columns that read operation number of times is pixel in LED panel.
To achieve these goals, according to an aspect of the present invention, a kind of LED panel pixel correction device is provided.This device comprises: receiving element, and for receiving single frame video data, single frame video data are the frame data in video to be corrected; Memory cell, for storing single frame video data to dynamic memory, wherein, is previously stored with correction data set in dynamic memory, and correction data set comprises multiple correction arrays pixel multiple in LED panel being performed to correction; Reading unit, for reading correction data set and single frame video data from dynamic memory; And correcting unit, for performing correction according to correction data set pair single frame video data.
To achieve these goals, according to an aspect of the present invention, a kind of LED panel pixel correction device is provided.This device comprises: dynamic memory, for receiving and storing single frame video data and correction data set, wherein, single frame video data are the frame data in video to be corrected, and correction data set comprises multiple correction arrays pixel multiple in LED panel being performed to correction; And programmable logic device, for reading single frame video data and correction data set and perform correction according to correction data set pair single frame video data in dynamic memory.
Further, single frame video data comprise adjacent one-frame video data and the second frame video data, dynamic memory comprises: the first dynamic memory and the second dynamic memory, wherein, first dynamic memory and the second dynamic memory are respectively used to receive and store adjacent one-frame video data and the second frame video data, wherein, store one-frame video data to the first dynamic memory successively, store the second frame video data to the second dynamic memory, one-frame video data is read successively from the first dynamic memory, the second frame video data is read from the second dynamic memory, wherein, while reading one-frame video data from the first dynamic memory, store the second frame video data to the second dynamic memory.
Further, dynamic memory comprises: correction data memory block, for storing correction data set; And video data storage region, for storing single frame video data.
The present invention is by receiving single frame video data; Store single frame video data to dynamic memory; Correction data set and single frame video data are read from dynamic memory; And perform correction according to correction data set pair single frame video data, solve the problem cannot carrying out pixel correction in correlation technique to the highdensity LED panel of large scale.By adopting, lower, the capacity of cost is comparatively large, processing speed faster dynamic memory as the memory in LED panel pixel correction method, achieve and pixel correction is carried out to the highdensity LED panel of large scale, reduce the cost of LED panel pixel correction method, and achieve the high-density city of data and the processing demands of two-forty read-write.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of LED panel pixel correction method according to a first embodiment of the present invention;
Fig. 2 is the flow chart of LED panel pixel correction method according to a second embodiment of the present invention;
Fig. 3 is the reading correction data set of LED panel pixel correction method according to the embodiment of the present invention and the schematic diagram of single frame video data;
Fig. 4 is the schematic diagram of LED panel pixel correction device according to a first embodiment of the present invention;
Fig. 5 is the schematic diagram of LED panel pixel correction device according to a second embodiment of the present invention; And
Fig. 6 is the schematic diagram of LED panel pixel correction device according to a third embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The application's scheme is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only the embodiment of the application's part, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the application's protection.
It should be noted that, term " first ", " second " etc. in the specification of the application and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged, in the appropriate case so that the embodiment of the application described herein.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
The embodiment provides a kind of LED panel pixel correction method.
Fig. 1 is the flow chart of LED panel pixel correction method according to a first embodiment of the present invention.As shown in Figure 1, the method comprises the following steps:
Step S101, receives single frame video data.
Single frame video data are the frame data in video to be corrected.Video to be corrected is video stream data, video stream data is in units of frame, one frame video is a static image, receive single frame video data to be received by the external interface of receiver, video flow data, such as, video data input interface, single frame video data are the piece images in video to be corrected, comprise the video data of each pixel in LED panel, the video data that pixel is corresponding can control colourity and the luminosity of the display of this pixel.Video to be corrected is the video flowing input carried out before pixel correction, pixel correction refers to the video data removing to adjust each pixel of video to be corrected according to the characteristics of luminescence of pixel self each in LED panel, the object of carrying out pixel correction to video data is the characteristics of luminescence that video data after making correction adapts to LED panel, improve brightness uniformity and the uniformity of chromaticity of LED panel display single frame video data, thus improve the display quality of video.
Step S102, stores single frame video data to dynamic memory.
After receiving single frame video data, single frame video data are stored to dynamic memory.Dynamic memory in the present invention is synchronous DRAM (SynchronousDynamicRandomAccessMemory, be called for short SDRAM), preferably, can be Double Data Rate synchronous DRAM (DoubleDateRateSDRAM, be called for short DDR), comprise first generation Double Data Rate synchronous DRAM (DDR1), second generation Double Data Rate synchronous DRAM (DDR2) and third generation Double Data Rate synchronous DRAM (DDR3).Specifically, single frame video data being stored to dynamic memory can be by the designated memory space in the video data of each pixel in single frame video data write dynamic memory, such as, a part is separated as video data storage region in dynamic memory, video stream data is real-time change, therefore, input real-time update in units of frame of video flowing is followed in video data storage region.Wherein, pixel can the address of a corresponding unit memory space, to search out the video data of pixel to be read from dynamic memory during reading video data.Alternatively, store single frame video data to be operated by programmable logic device (FPGA) to dynamic memory.
Step S103, reads correction data set and single frame video data from dynamic memory.
After single frame video data are stored in dynamic memory, read out single frame video data, and read out correction data set.Correction data set is set pixel multiple in LED panel being performed to the multiple correction arrays corrected, corresponding one an of pixel in LED panel corrects array, this correction array can obtain by doing optical characteristics experiment to LED panel in advance, because pixel each in LED panel is fixing, therefore, the correction array of each pixel is also fixing.Each LED particle of each LED panel module correspond to one and corrects array, and this correction array can comprise multiple correction data, constitutes the correction data of the large quantity of LED panel.Alternatively, a part of region can be separated as correction data memory block in dynamic memory, for storing correction data set, correction data memory block can load correction data set after power-up, wherein, because the correction array of each pixel is constant, the content of the correction data memory block in dynamic memory does not change after power-up, and the video data storage region in dynamic memory can according to the input real-time update of video flowing.Alternatively, from dynamic memory, extract single frame video data to be operated by FPGA.
Before read correction data set and single frame video data from dynamic memory, in dynamic memory, be previously stored with correction data set.Alternatively, correction data set can be stored in advance in flash memory (Flash), and Flash still can preserve data after a loss of power, prevents correction data set from losing.After reception power-up initializing signal, dynamic memory carries out power-up initializing, correction data set is read out from Flash, and is stored in dynamic memory.Alternatively, a part of region can be separated as correction data memory block in dynamic memory, for storing correction data set.Storage mode can be calculate the reading time of reading LED panel lastrow or correction array corresponding to a row pixel to read the time as default unit, the time is read for the time interval with default unit, namely by line period or the read operation starting Flash in units of the row cycle, the correction array that a row or column pixel is corresponding is read from Flash, then the read operation of next line or correction array corresponding to next column pixel is started, until correction data set is all stored in dynamic memory.Alternatively, the read-write operation of Flash adopts Serial Peripheral Interface (SPI) (SPI) agreement, after SPI reads, carry out serioparallel exchange, and stored in buffer, by memory address corresponding in buffer write dynamic memory.If adopt the read operation of SPI protocol, then in units of line period, start the read operation of SPI, often reading is once the data of a line.After the digital independent of all row, after namely having carried out the secondary read operation of line number, correction data set has read complete, terminates read operation.Adopt to read from Flash in such a way and correct array, according to the position coordinates of pixel, accurately correction array can be stored to the memory space position of specifying in dynamic memory.
Alternatively, if there are two dynamic memories, twice correction data set to be read from Flash after power-up initializing, be stored to respectively in two dynamic memories.
Preferably, the method reading correction data set and single frame video data from dynamic memory can be: by the correction array of the pixel number certificate in the reading order reading single frame video data of the pixel preset with this pixel number certificate, after often having read a pixel number certificate and the correction array of this pixel number according to correspondence, read next pixel number certificate according to the reading order of pixel.The reading order of pixel can be read by row according to putting in order of pixel in LED panel or read by row, and often first row reads the pixel of first row, or often row read the pixel of the first row.Wherein, multiple pixel in LED panel and multiple correction array one_to_one corresponding, multiple pixel numbers that multiple pixel and single frame video data comprise are according to one_to_one corresponding, therefore, multiple correction array also with multiple pixel number according to one_to_one corresponding, namely pixel number corrects array according to correspond to one.Preferably, dynamic memory comprises correction data memory block and video data storage region, correction data memory block is for storing correction data set, video data storage region is for storing single frame video data, the method of read pixel point data and corresponding correction array can be determine pixel to be read after, the memory address that this pixel is corresponding in correction data memory block reads and corrects array; And the memory address read pixel point data that this pixel is corresponding in video data storage region, reading order can be first read to correct array read pixel point data again, also can be that first read pixel point data reads correction array again.After judging the correction array that pixel is corresponding and pixel digital independent, judge whether to have read correction array corresponding to all pixels and pixel number certificate, also can be judge whether to have read single frame video data, if it is complete to judge that single frame video data do not read, then the reading order according to pixels put reads correction array and the pixel number certificate of next pixel.
Preferably, two dynamic memories can be adopted to carry out read-write operation to video stream data simultaneously, specifically, two dynamic memories are respectively dynamic memory A and dynamic memory B, the video stream data of input is in units of frame, when storing the i-th+1 frame single frame video data to dynamic memory A, the i-th frame single frame video data are read from dynamic memory B, wherein, i-th frame single frame video data are receiving and before storing the i-th+1 frame single frame video data to dynamic memory A, receiving and be stored in dynamic memory B.When reading the i-th+1 frame single frame video data from dynamic memory A, store the i-th+2 frame single frame video data to dynamic memory B, when reading the i-th+2 frame single frame video data from dynamic memory B, store the i-th+3 frame single frame video data to dynamic memory A.Wherein, the single frame video data of the i-th frame, the i-th+1 frame, the i-th+2 frame, the i-th+3 frame are single frame video data adjacent according to the order of sequence arbitrarily in the video to be corrected of input.Also, namely, after receiving and stored in one-frame video data to dynamic memory, receive next frame video data and be stored in another dynamic memory; After read one-frame video data from a dynamic memory, from another dynamic memory, read next frame video data; Further, two dynamic memories carry out ping-pong operation in units of the frame period, when one of them dynamic memory carries out storage operation, read the single frame video data of current storage in this dynamic memory from another dynamic memory.
Step S104, performs correction according to correction data set pair single frame video data.
After read out correction data set and single frame video data from dynamic memory, perform correction according to correction data set pair single frame video data.
Preferably, performing according to correction data set pair single frame video data the concrete grammar corrected can be, presetting correcting algorithm by data corresponding for each pixel in correction data set and single frame video data being substituted into, calculating the pixel number of each pixel according to the correction pixels point data after correcting array and correcting.Multiple pixel in LED panel and multiple correction array one_to_one corresponding, multiple pixel numbers that multiple pixel and single frame video data comprise are according to one_to_one corresponding, therefore, multiple correction array also with multiple pixel number according to one_to_one corresponding, namely pixel number corrects array according to correspond to one.Alternatively, by the correction array of the pixel number certificate in the reading order reading single frame video data of the pixel preset with this pixel number certificate, after often having read a pixel number certificate and the correction array of this pixel number according to correspondence, pixel number certificate and correction array being substituted into presets in correcting algorithm, obtain the correction pixels point data after correcting array correction, judge whether to correct complete current single frame video data, if do not correct complete, read pixel number certificate corresponding to next pixel according to the reading order of the pixel preset and correct array, and carry out correction calculation, until current single frame video data all correct complete.Wherein, the reading order of pixel can be read by row according to putting in order of pixel in LED panel or read by row, and often first row reads the pixel of first row, or often row read the pixel of the first row.
Alternatively, above-mentioned default correcting algorithm can be that the single frame video data first treated in correcting video carry out gamma transformation, and then the video data after gamma transformation and correction array are carried out computing.Wherein, gamma formula is as follows:
D＝1023*(d÷1023)
gamma
Wherein, d is the pixel number certificate of a pixel in the single frame video data of video to be corrected, and D is the pixel number certificate after carrying out gamma transformation process, and gamma is gamma parameter.Each pixel number comprises the video data of three kinds of colors according to d: d
r, d
gand d
b, the pixel number after each process is according to the video data comprising three kinds of colors: D
r, D
gand D
b, the correction array of each pixel comprises L
r, L
gand L
bthree correction datas, wherein, subscript R, G and B represent the redness of this pixel, green and blue data respectively.The correction calculation formula carried out after gamma transformation is as follows:
D
Rout＝d
R*D
RL
R+d
G*D
GL
R+d
B*D
BL
R
D
Gout＝d
R*D
RL
G+d
G*D
GL
G+d
B*D
BL
G
D
Bout＝d
R*D
RL
B+d
G*D
GL
B+d
B*D
BL
B
Wherein, D
rout, D
gout, D
boutbe respectively the redness in the video data of the pixel after correction, green and blue data.Correct array only relevant to the position of LED particle in LED panel, namely only relevant to the position of each pixel, have nothing to do with video data.After gamma transformation formula and correction calculation formula manipulation, complete the correction process of the video data of the single-point of a pixel in single frame video data, obtain correction pixels point data.Alternatively, FPGA can be adopted to carry out the computing of correction process.
The LED panel pixel correction method that first embodiment of the invention provides, by receiving single frame video data; Store single frame video data to dynamic memory; Correction data set and single frame video data are read from dynamic memory; And perform correction according to correction data set pair single frame video data, solve the problem cannot carrying out pixel correction in correlation technique to the highdensity LED panel of large scale.By adopting, lower, the capacity of cost is comparatively large, processing speed faster dynamic memory as the memory in LED panel pixel correction method, achieve and pixel correction is carried out to the highdensity LED panel of large scale, reduce the cost of LED panel pixel correction method, and achieve the high-density city of data and the processing demands of two-forty read-write.
Fig. 2 is the flow chart of LED panel pixel correction method according to a second embodiment of the present invention.This embodiment can as the preferred implementation of above-mentioned first embodiment, and as shown in Figure 2, the method comprises the following steps:
Step S201, input correction data.
The correction data that in input LED panel, all LED particles are corresponding.Correction data can obtain by doing optical characteristics experiment to LED panel in advance.
Step S202, writes correcting pixel data in flash memory (Flash).
Because pixel each in LED panel is fixing, therefore, the correction data of a LED panel is also fixing.Data in Flash can not disappear after a power failure, are applicable to storing changeless data.Each pixel can corresponding multiple correction data, and all correction datas corresponding for pixel are called correcting pixel data.The number of the correction data that one group of correcting pixel data comprises can be identical
Step S203, reads correcting pixel data from Flash.
After the power-up, from Flash, correcting pixel data is read line by line.
Step S204, writes the correcting pixel data read from Flash in dynamic memory (DDR).
Correction data memory block can be comprised in DDR, for storing correction data, by the correcting pixel data write DDR that reads from Flash, complete DDR power on after the initialization of correction data memory block.
Step S205, video data before input corrects.
Before correcting, video data is video stream data, take frame as the cycle.Every frame video data comprises multiple video pixel data, the pixel one_to_one corresponding that multiple video pixel data is corresponding with each LED in LED panel.
Step S206, writes video pixel data in DDR.
Can video data storage region be comprised in DDR, video pixel data is write in DDR.
Step S207, reads video pixel data from DDR.
Step S208, reads correcting pixel data from DDR.
In units of the video pixel data corresponding by LED panel lastrow pixel and correcting pixel data, from DDR, read out video data and correction data.Generally speaking, the ratio of the data volume of the video pixel data of a pixel and the data volume of correcting pixel data is 1:n, n correction data can be comprised in one group of correcting pixel data, therefore, the speed reading data from DDR with to store data to the ratio of the speed of DDR be 1:(1+n).When the data volume of a two field picture is q, memory space required in dynamic memory is (1+n) q.Read out from DDR video data and correction data can be read video pixel data corresponding to pixel and correcting pixel data after, after reading video pixel data corresponding to next pixel and correcting pixel data.Fig. 3 is the reading correction data set of LED panel pixel correction method according to the embodiment of the present invention and the schematic diagram of single frame video data.As shown in Figure 3, in LED panel pixel correction method, reading correction data set and single frame video data are equivalent to read correcting pixel data corresponding to each pixel and video pixel data, in each row of data generated after reading, the video pixel data that each pixel is corresponding is adjacent with correcting pixel data, video pixel data can be extracted inside the data of every a line, such as, in Fig. 3, S0, S1 is video data, P01, P02, P03, P11, P12, P13 is correction data, wherein, P01, P02, P03 is the correction data of the pixel that S0 is corresponding, P11, P12, P13 is the correction data of the pixel that S1 is corresponding.
Step S209, carries out pixel correction computing according to correcting pixel data to video pixel data.
After reading out correcting pixel data and video pixel data, calculate according to the pixel correction computing preset.
Step S210, output calibration rear video data.
After the video pixel data process of each pixel, the video data after output calibration.
It should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
Embodiments of the invention additionally provide a kind of LED panel pixel correction device.It should be noted that, the LED panel pixel correction device of the embodiment of the present invention may be used for performing LED panel pixel correction method of the present invention.
Fig. 4 is the schematic diagram of LED panel pixel correction device according to a first embodiment of the present invention.As shown in Figure 4, this device comprises: receiving element 10, memory cell 20, reading unit 30 and correcting unit 40.
Receiving element 10 is for receiving single frame video data, and single frame video data are the frame data in video to be corrected.Memory cell 20, for storing single frame video data to dynamic memory, wherein, is previously stored with correction data set in dynamic memory, and correction data set comprises multiple correction arrays pixel multiple in LED panel being performed to correction.Reading unit 30 for reading correction data set and single frame video data from dynamic memory.Correcting unit 40 is for performing correction according to correction data set pair single frame video data.
The LED panel pixel correction device that first embodiment of the invention provides, by adopting lower-cost dynamic memory as the memory in LED panel pixel correction device, solve the problem cannot carrying out pixel correction in correlation technique to the highdensity LED panel of large scale.By adopting, lower, the capacity of cost is comparatively large, processing speed faster dynamic memory as the memory in LED panel pixel correction device, achieve and pixel correction is carried out to the highdensity LED panel of large scale, reduce the cost of LED panel pixel correction device, and achieve the high-density city of data and the processing demands of two-forty read-write.
Fig. 5 is the schematic diagram of LED panel pixel correction device according to a second embodiment of the present invention.As shown in Figure 5, this device comprises: dynamic memory 50 and programmable logic device 60.
Dynamic memory 50 is for receiving and storing single frame video data and correction data set, wherein, single frame video data are the frame data in video to be corrected, correction data set comprises multiple correction arrays pixel multiple in LED panel being performed to correction, and each correction array comprises one or more correction datas corresponding to a pixel.Programmable logic device 60 for reading single frame video data and correction data set and performing correction according to correction data set pair single frame video data in dynamic memory 50.
Preferably, single frame video data comprise adjacent one-frame video data and the second frame video data, dynamic memory 50 comprises the first dynamic memory and the second dynamic memory, wherein, first dynamic memory and the second dynamic memory are respectively used to receive and store adjacent one-frame video data and the second frame video data, wherein, store one-frame video data to the first dynamic memory successively, store the second frame video data to the second dynamic memory, one-frame video data is read successively from the first dynamic memory, the second frame video data is read from the second dynamic memory, wherein, while reading one-frame video data from the first dynamic memory, store the second frame video data to the second dynamic memory.
Preferably, dynamic memory 50 comprises correction data memory block, for storing correction data set, and video data storage region, for storing single frame video data.
Fig. 6 is the schematic diagram of LED panel pixel correction device according to a third embodiment of the present invention.As shown in Figure 5, this device comprises dynamic memory 50 and programmable logic device 60, and wherein, dynamic memory 50 comprises correction data memory block 70 and video data storage region 80.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a LED panel pixel correction method, is characterized in that, comprising:
Receive single frame video data, described single frame video data are the frame data in video to be corrected;
Store described single frame video data to dynamic memory;
Described correction data set and described single frame video data are read from described dynamic memory, wherein, be previously stored with correction data set in described dynamic memory, described correction data set comprises multiple correction arrays pixel multiple in LED panel being performed to correction; And
According to described correction data set pair, single frame video data perform correction.
2. method according to claim 1, is characterized in that, described dynamic memory comprises the first dynamic memory and the second dynamic memory, and described single frame video data comprise adjacent one-frame video data and the second frame video data,
Store described single frame video data to comprise to dynamic memory: store described one-frame video data successively to described first dynamic memory, store described second frame video data to described second dynamic memory,
From described dynamic memory, read described correction data set and described single frame video data comprise: read described one-frame video data from described first dynamic memory successively, read described second frame video data from described second dynamic memory,
Wherein, while reading described one-frame video data from described first dynamic memory, store described second frame video data to described second dynamic memory.
3. method according to claim 1, it is characterized in that, described multiple pixel comprises the first pixel and second pixel of ordinal selection, described multiple correction array comprise described first pixel corresponding first correct array and described second pixel corresponding second correct array, described single frame video data comprise the first pixel number certificate corresponding to described first pixel and the second pixel number certificate corresponding to described second pixel, read described correction data set and described single frame video data comprise from described dynamic memory:
Read described first and correct array and described first pixel number certificate;
Judge whether described first correction array and described first pixel number certificate read complete;
When described first corrects array and described first pixel digital independent is complete, judge whether described single frame video data read complete; And
When described single frame video data do not read complete, read described second and correct array and described second pixel number certificate.
4. method according to claim 3, it is characterized in that, described dynamic memory comprises correction data memory block and video data storage region, described correction data memory block is for storing described correction data set, described video data storage region, for storing described single frame video data, is read described first and is corrected array and described first pixel number according to comprising:
The memory address that first pixel is corresponding described in described correction data memory block reads described first and corrects array; And
The memory address that first pixel is corresponding described in described video data storage region reads described first pixel number certificate.
5. method according to claim 1, it is characterized in that, described multiple pixel comprises the first pixel and second pixel of ordinal selection, described multiple correction array comprise described first pixel corresponding first correct array and described second pixel corresponding second correct array, described single frame video data comprise the first pixel number certificate corresponding to described first pixel and the second pixel number certificate corresponding to described second pixel, and according to described correction data set pair, single frame video data perform correction and comprise:
The first pixel correction data corresponding to described first pixel is calculated by default correcting algorithm, wherein, the described first correction array that described default correcting algorithm is used for according to reading obtains described first pixel correction data to described first pixel number according to execution correction calculation;
Judge whether described single frame video data correct complete;
If described single frame video data do not correct complete, calculate the second pixel correction data corresponding to described second pixel by described default correcting algorithm, described default correcting algorithm is used for correcting array according to read described second and obtains described second pixel correction data to described second pixel number according to execution correction calculation.
6. method according to claim 1, is characterized in that, described correction data set prestores in a flash memory, and before reception single frame video data, described method also comprises:
Receive power-up initializing signal;
In response to described power-up initializing signal, the read operation of described flash memory is started for the time interval with the default unit time of reading, and the correction array read within the described default unit reading time is stored to described dynamic memory, wherein, the described default unit time of reading is the time of reading correction array corresponding to described LED panel lastrow pixel or correction array corresponding to described LED panel previous column pixel in described flash memory; And
The number of times of described read operation is counted, when the number of times of described read operation reaches default read operation number of times, terminate described read operation, wherein, when the described default unit time of reading is the time of reading correction array corresponding to described LED panel lastrow pixel, described default read operation number of times is the line number of pixel in described LED panel, when the described unit time of reading is the time of reading correction array corresponding to described LED panel previous column pixel, described default read operation number of times is the columns of pixel in described LED panel.
7. a LED panel pixel correction device, is characterized in that, comprising:
Receiving element, for receiving single frame video data, described single frame video data are the frame data in video to be corrected;
Memory cell, for storing described single frame video data to dynamic memory, wherein, is previously stored with correction data set in described dynamic memory, and described correction data set comprises multiple correction arrays pixel multiple in LED panel being performed to correction;
Reading unit, for reading described correction data set and described single frame video data from described dynamic memory; And
Correcting unit, performs correction for single frame video data according to described correction data set pair.
8. a LED panel pixel correction device, is characterized in that, comprising:
Dynamic memory, for receiving and storing single frame video data and correction data set, wherein, described single frame video data are the frame data in video to be corrected, and described correction data set comprises multiple correction arrays pixel multiple in LED panel being performed to correction; And
Programmable logic device, for reading described single frame video data and described correction data set and single frame video data perform correction according to described correction data set pair in described dynamic memory.
9. device according to claim 8, is characterized in that, described single frame video data comprise adjacent one-frame video data and the second frame video data, and described dynamic memory comprises:
First dynamic memory and the second dynamic memory, wherein, described first dynamic memory and described second dynamic memory are respectively used to receive and store adjacent one-frame video data and the second frame video data, wherein, store described one-frame video data successively to described first dynamic memory, store described second frame video data to described second dynamic memory, described one-frame video data is read successively from described first dynamic memory, described second frame video data is read from described second dynamic memory, wherein, while reading described one-frame video data from described first dynamic memory, store described second frame video data to described second dynamic memory.
10. device according to claim 8, is characterized in that, described dynamic memory comprises:
Correction data memory block, for storing described correction data set; And
Video data storage region, for storing described single frame video data.
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| CN201510921211.3A CN105491363A (en) | 2015-12-11 | 2015-12-11 | LED panel pixel correction method and apparatus |
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