CN105118432A - Alternative-point-collection-mode-based LED display screen correction method - Google Patents
Alternative-point-collection-mode-based LED display screen correction method Download PDFInfo
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Abstract
The invention relates to an alternative-point-collection-mode-based LED display screen correction method. The method comprises the following steps: starting an image collection thread to collect a plurality of first color images, a plurality of second color images, and a plurality of third color images; after collection completion of the first piece of first color image, starting a first image analysis thread to carry out a parallel analysis on the first color images; after collection completion of the first piece of the second color image, starting a second image analysis thread to carry out a parallel analysis on the second color images; and after collection completion of the first piece of third color image, starting a third image analysis thread to carry out a parallel analysis on the third color images. The second image analysis thread and the third image analysis thread are started while the first image analysis thread is carrying out the parallel analysis on the first color images. Therefore, parallel processing of time for collection and image analyses can be realized, thereby shortening the correction time and improving the correction efficiency.
Description
Technical field
The present invention relates to LED and show alignment technique field, particularly a kind of LED display bearing calibration based on dot interlace acquisition mode.
Background technology
Current full-color LED display screen mostly is based on blue (B) three primary colours of red (R) green (G), it is brightness by each LED point under respectively gather and analysis RGB three colors and chrominance information that LED display corrects, then desired value as required calculates correction coefficient.Along with the size of LED display is increasing, resolution is more and more higher, the mode that single color acquisition before analyzes complete other colors of reprocessing can not meet the efficiency requirements that large resolution corrects; Along with the development of LED display pointwise correction, derive dot interlace image data technology, it is divided by cell size LED display, a kind of color LED point of a LED pixel in all cells of each collection in each cell, therefore single acquisition can process larger subregion.
For existing dot interlace image data technology, be according to red, green, blue acquisition order in trimming process; When all images gathering complete single color just start the graphical analysis of current color later, after waiting for that the image of current color is all analyzed, just carry out collection and the analysis of subsequent color image.Owing to needing, in the image acquisition of single color with after analyzing, just to carry out image acquisition and the analysis of next color, cause that the processing time of whole correcting process is long, efficiency is lower.
Summary of the invention
Therefore, for overcoming defect and the deficiency of prior art existence, the present invention proposes a kind of LED display bearing calibration based on dot interlace acquisition mode.
Particularly, a kind of LED display bearing calibration based on dot interlace acquisition mode that the embodiment of the present invention proposes, comprises step: open an image acquisition thread to gather multiple first color images, multiple second color images and multiple the 3rd color images; After having gathered first described first color image, open the first graphical analysis thread to start the first color image described in parallel parsing; After having gathered first described second color image, open the second graphical analysis thread to start the second color image described in parallel parsing; After having gathered first described 3rd color image, open the 3rd graphical analysis thread to start the 3rd color image described in parallel parsing; Wherein, described second graphical analysis thread and described 3rd graphical analysis thread are all analyze in the process of described first color image at described first graphical analysis thread parallel to open.
Individual in one embodiment of the invention, above-mentioned image acquisition thread first gathers multiple first color images described, gathers multiple second color images described again, finally gathers multiple the 3rd color images described.
Individual in one embodiment of the invention, above-mentioned image acquisition thread intersection gathers described multiple first color images, multiple second color images described and multiple the 3rd color images described.
In addition, a kind of LED display bearing calibration based on dot interlace acquisition mode that another embodiment of the present invention proposes, comprises step: open an image acquisition thread to intersect the monochrome image gathering multiple different colours; After having gathered first described monochrome image, a graphical analysis thread is opened to carry out graphical analysis until described first monochrome image is analyzed complete while often starting to gather next monochrome image, the total number Z of wherein said graphical analysis thread meets relational expression: intZ=(int) [(Y+X)/X], Y is the image acquisition time of individual monochrome image, and Y is the picture analysis time of individual monochrome image.
In one embodiment of the invention, the monochrome image of multiple different colours above-mentioned comprises multiple first color images, multiple second color images and multiple the 3rd color images.
As from the foregoing, the embodiment of the present invention can time of parallel processing collection and analysis chart picture, thus can shorten correction time, improves and correct efficiency.
By the detailed description below with reference to accompanying drawing, other side of the present invention and feature become obvious.But it should be known that this accompanying drawing is only the object design of explanation, instead of as the restriction of scope of the present invention, this is because it should with reference to additional claim.Should also be appreciated that, unless otherwise noted, unnecessaryly draw accompanying drawing to scale, they only try hard to structure described herein and flow process are described conceptually.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fig. 1 is image acquisition and the analytic process schematic diagram of first embodiment of the invention.
Fig. 2 is image acquisition and the analytic process schematic diagram of second embodiment of the invention.
Fig. 3 is image acquisition and the analytic process schematic diagram of third embodiment of the invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
An object of the present invention is to propose a kind of LED display bearing calibration based on dot interlace acquisition mode, efficiency is corrected to improve LED display, the method uses the principle of image acquisition and graphical analysis parallel processing, shortens the processing time of flow process, raises the efficiency.Particularly, be suitable for performing on the computing machine being provided with correction software in each embodiment following of the present invention, start image acquisition thread by correction software obtain the image of image capture device collection and start multiple graphical analysis thread and carry out graphical analysis, and then realize the LED display bearing calibration based on dot interlace acquisition mode that the present invention proposes.
[the first embodiment]
First embodiment of the invention adopts that RGB gathers respectively, the mode of image acquisition and analysis parallel processing is carried out, specific as follows:
If LED display resolution is 256 × 256 and carries out dot interlace to LED display to gather the drainage pattern of image be 2 × 2 (the cell size also namely divided is 2 × 2 LED pixels), monochromatic collection need gather 2*2=4 altogether and open image; RGB three colors all gather needs collection 3*4=12 to open image.It is worth mentioning that, each LED pixel of the LED display of the present embodiment is made up of a red LED lamp point, a green LED lamp point and a blue led lamp point.
If the acquisition time of an image is 1s, analysis time is 3s;
Processing mode is conventionally then:
The image acquisition of single color, analyze complete, just carry out image acquisition and the analysis of next color.
The image acquisition time of single color is: the analysis time of the single color of 4*1s=4s is: 4*3s=12s;
Image acquisition and the analyzing total time of three colors are: 3* (4s+12s)=48s;
And the overall flow of first embodiment of the invention is as shown in Figure 1, be specially:
(E11) first red image collection starts;
(E12), while gathering from second red image, red image starts parallel parsing;
(E13), after four red image gather, continue to gather green image; When having gathered first green image, now green image has started parallel parsing;
(E14) when having gathered first blue image, blue image starts parallel parsing;
(E15) when four blue images are all analyzed complete, flow process is complete.
The processing mode of first embodiment of the invention is then:
After red first image acquisition, graphical analysis is parallel with collection;
The image acquisition time of three colors is: 3*4s=12s, and the image acquisition of single color and analysis time be: 4*3s+1s=13s;
The image acquisition of three colors and analyzing total time: 9s+ (4*3s)=21s, as shown in Figure 1; Wherein, 9s is the time after blue first image acquisition, and 4*3s is the time that four blue images are analyzed.
Known by contrasting above, when minimum 2 × 2 dot interlace collections of use, employing RGB gathers respectively, the mode of parallel processing, and improved efficiency is 48s-21s=27s; If the resolution of LED display is larger, dot interlace number is more, then the efficiency promoted is more obvious.
[the second embodiment]
First embodiment of the invention adopts RGB to intersect to gather, the mode of image acquisition and analysis parallel processing is carried out, specific as follows:
If LED display resolution is 256 × 256, and carrying out dot interlace to LED display, to gather the drainage pattern of image be 2 × 2, and monochromatic collection need gather 2*2=4 altogether and open image; RGB three colors all gather needs collection 3*4=12 to open image.It is worth mentioning that, each LED pixel of the LED display of the present embodiment is made up of a red LED lamp point, a green LED lamp point and a blue led lamp point.
If the acquisition time of an image is 1s, analysis time is 3s;
The overall flow of second embodiment of the invention as shown in Figure 2, is specially:
(E21) start to gather first red image;
(E22) first red image gathers complete, starts to gather first green image, and first red image starts parallel parsing (also namely first red image analyzes 1s);
(E23) first green image gathers complete, start to gather first blue image, first green image starts parallel parsing (also namely first green image analyzes 1s), and first red image is also parallel parsing (also namely first red image analyzes 2s) simultaneously;
(E24) first blue image starts parallel parsing (also namely first blue image analyzes 1s), first green image analysis simultaneously is also also analyzing (analyzing 3s) in analysis (analyzing 2s), first red image analysis, and red analysis is complete;
(E25) collection of next Zhang Hongse, green, blue image is started, more than logical and identical;
(E26) when all red image are analyzed complete, green image postpones 1s and analyzes complete, and blue image postpones 2s and analyzes complete, and whole flow process is complete.
The processing mode of second embodiment of the invention is:
After first image acquisition, three color analysis and collection parallel processing;
The image acquisition time of three colors: 3*4s=12s;
The picture analysis time of three colors: (3*4s)+2s=14s, wherein 3*4s is the image acquisition T.T. of single color acquisition 4 images, 3 kinds of colors, 2s be last process two kinds of colors separately needed for residual image analysis time.
The image acquisition of three colors and analyzing total time: 1s+14s=15s, as shown in Figure 2.
As can be seen here, when minimum 2 × 2 dot interlace collections of use, adopt the mode of the collection of RGB intersection, parallel processing, improved efficiency is 48s-15s=33s; If the resolution of LED display is larger, dot interlace number is more, then the efficiency promoted is more obvious.
[the 3rd embodiment]
The mode of the collection of third embodiment of the invention employing RGB intersection, alternate analysis, multi-threading parallel process is carried out, specific as follows:
If LED display resolution is 256 × 256, and carrying out dot interlace to LED display, to gather the drainage pattern of image be 2 × 2, and monochromatic collection need gather 2*2=4 altogether and open image; RGB three colors all gather needs collection 3*4=12 to open image.It is worth mentioning that, each LED pixel of the LED display of the present embodiment is made up of a red LED lamp point, a green LED lamp point and a blue led lamp point.
The overall flow of third embodiment of the invention as shown in Figure 3, is specially:
(E31) collection that image acquisition thread carries out first image is started;
(E32) start first graphical analysis thread and carry out first graphical analysis;
(E33) collecting thread continues the collection of second image;
(E34) number of follow-up startup graphical analysis thread is according to the mode process of intZ=(int) [(Y+X)/X], wherein, Y represents the analysis time of an image, X represents the acquisition time of an image, and Z represents the integral part of ratio result and the total number of graphical analysis thread for starting in whole flow process;
(E35) new graphical analysis thread is just started as long as have the image that gathered but do not taken by the graphical analysis thread started;
(E36) when all images are all analyzed complete, whole flow process terminates.
The processing mode of third embodiment of the invention:
Suppose the acquisition time X=0.9s of an image, Y=4s analysis time of an image, the number intZ=(int) [(4+0.9)/0.9]=5 of startup analysis thread;
After gathering first image, while second image acquisition, first graphical analysis thread starts.
The collection of 5 images has been completed while first graphical analysis is complete, therefore other 4 graphical analysis threads of sequential start after the first graphical analysis thread starts, wherein, the start-up time of second graphical analysis thread is 1.8s, the start-up time of the 3rd graphical analysis thread is 2.7s, the start-up time of the 4th graphical analysis thread is 3.6s, and the start-up time of the 5th graphical analysis thread is 4.5s;
The color of the image analyzed successively determines according to the color gathered successively;
Analyze until the complete end of all graphical analyses successively.
As can be seen from Figure 3, the T.T. needed for gather and analysis of all images is 14.8s.
Comparison of aforementioned first, second, and third embodiment:
A () is from the angle of CPU and EMS memory occupation:
The hardware resource that first embodiment takies is minimum, but the shortest time of four threads (being also an image acquisition thread and three graphical analysis threads) parallel processing, the computer low for hardware configuration is suitable for;
Second embodiment is under the time of graphical analysis and collection is less than 3 times of ratios, and the resource occupation of hardware is moderate;
3rd embodiment is larger in the time ratios of graphical analysis and collection, larger to the consumption of hardware resource.
B () is from the angle of efficiency:
When not considering hardware resource consumption, the 3rd embodiment most effective, the second embodiment is taken second place, and the first embodiment is minimum.
Finally, can also find from Fig. 1, Fig. 2 and Fig. 3, the general character that the first embodiment and the second embodiment exist has: each graphical analysis thread only carries out the analysis of single color image; The general character that second embodiment and the 3rd embodiment exist has: the image intersection of shades of colour gathers.
Moreover, brightness or the light tone angle value of the RGB three-color LED pixel in LED display can be obtained after carrying out the analysis of RGB tristimulus image by any embodiment in aforementioned first, second, and third embodiment, utilize the difference between the brightness that obtains or light tone angle value (also i.e. brightness or bright chroma initial value) and correction target brightness or light tone angle value can obtain brightness or the bright chroma correction coefficient of each LED pixel in LED display afterwards.
In addition, it should be noted that, the present invention is not limited to be applied to RGB three-primary color LED display screen, also can be applied to the LED display of more multiple bases; Moreover the viewing area corresponding to individual color image is not limited to the whole viewing area of LED display, it also can be partial display area.
In sum, the embodiment of the present invention can time of parallel processing collection and analysis chart picture, thus can shorten correction time, improves and correct efficiency.
So far, apply specific case herein and set forth the principle of the LED display bearing calibration based on dot interlace acquisition mode that the present invention proposes and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention; all will change in specific embodiments and applications; in sum, this description should not be construed as limitation of the present invention, and protection scope of the present invention should be as the criterion with appended claim.
Claims (5)
1., based on a LED display bearing calibration for dot interlace acquisition mode, it is characterized in that, comprise step:
Open an image acquisition thread to gather multiple first color images, multiple second color images and multiple the 3rd color images;
After having gathered first described first color image, open the first graphical analysis thread to start the first color image described in parallel parsing;
After having gathered first described second color image, open the second graphical analysis thread to start the second color image described in parallel parsing;
After having gathered first described 3rd color image, open the 3rd graphical analysis thread to start the 3rd color image described in parallel parsing;
Wherein, described second graphical analysis thread and described 3rd graphical analysis thread are all analyze in the process of described first color image at described first graphical analysis thread parallel to open.
2. as claimed in claim 1 based on the LED display bearing calibration of dot interlace acquisition mode, it is characterized in that, described image acquisition thread first gathers multiple first color images described, gathers multiple second color images described again, finally gathers multiple the 3rd color images described.
3. as claimed in claim 1 based on the LED display bearing calibration of dot interlace acquisition mode, it is characterized in that, described image acquisition thread intersection gathers described multiple first color images, multiple second color images described and multiple the 3rd color images described.
4., based on a LED display bearing calibration for dot interlace acquisition mode, it is characterized in that, comprise step:
Open an image acquisition thread to intersect the monochrome image gathering multiple different colours;
After having gathered first described monochrome image, a graphical analysis thread is opened to carry out graphical analysis until described first monochrome image is analyzed complete while often starting to gather next monochrome image, the total number Z of wherein said graphical analysis thread meets relational expression: intZ=(int) [(Y+X)/X], Y is the image acquisition time of individual monochrome image, and Y is the picture analysis time of individual monochrome image.
5., as claimed in claim 4 based on the LED display bearing calibration of dot interlace acquisition mode, it is characterized in that, the monochrome image of multiple different colours described comprises multiple first color images, multiple second color images and multiple the 3rd color images.
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| CN110223626A (en) * | 2019-04-10 | 2019-09-10 | 北京凯视达科技有限公司 | A kind of point-by-point bright chroma correction accelerating method and system of all-colour LED |
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Address after: 710075 DEF101, Zero One Square, Xi'an Software Park, No. 72 Zhangbajie Science and Technology Second Road, Xi'an High-tech Zone, Shaanxi Province Patentee after: XI'AN NOVASTAR TECH Co.,Ltd. Address before: 710075 Qinfengge D District 401, Xi'an Software Park, 68 Science and Technology Second Road, Xi'an High-tech Zone, Shaanxi Province Patentee before: Xi'an NovaStar Tech Co.,Ltd. |