CN105118432B - LED display bearing calibration based on dot interlace acquisition mode - Google Patents
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Abstract
The present invention relates to a kind of LED display bearing calibration based on dot interlace acquisition mode, including step：An IMAQ thread is opened to gather multiple first color images, multiple second color images and multiple the 3rd color images；After first first color image has been gathered, the first graphical analysis thread is opened to start the first color image described in parallel parsing；After first second color image has been gathered, the second graphical analysis thread is opened to start the second color image described in parallel parsing；After first the 3rd color image has been gathered, the 3rd graphical analysis thread is opened to start the 3rd color image described in parallel parsing；Wherein, the second graphical analysis thread and the 3rd graphical analysis thread are opened during the first color image described in described first image analysis thread parallel parsing.Therefore, the present invention can be gathered and be analyzed the time of image with parallel processing, so as to shorten correction time, improve correction efficiency.
Description
Technical field
The present invention relates to LED to show alignment technique field, more particularly to a kind of LED display based on dot interlace acquisition mode
Bearing calibration.
Background technology
Full-color LED display screen is mostly that LED display school is exactly based on based on red (R) green (G) blue (B) three primary colours at present
Collection and the brightness of each LED point and chrominance information under analysis three colors of RGB respectively, further according to the desired value of needs
To calculate correction coefficient.As the size of LED display is increasing, resolution ratio more and more higher, single color acquisition before
Analysis, which finishes, reprocesses the modes of other colors and can not meet the efficiency requirements of big resolution ratio correction；As LED display is point-by-point
The development of correction, dot interlace gathered data technology is derived, it is to divide LED display by cell size, collection every time
A kind of color LED point of a LED pixel in all cells in each cell, therefore single acquisition can be handled
Bigger subregion.
It is according to red, green, the acquisition order of blueness for existing dot interlace gathered data technology, in trimming process；
The graphical analysis of current color is begun to after collection finishes all images of single color, waits the image of current color all
After analysis, the collection and analysis of subsequent color image are just carried out.Due to needing the IMAQ in single color and analysis
After, IMAQ and the analysis of next color could be carried out, cause the processing time of whole correcting process is long, efficiency compared with
It is low.
The content of the invention
Therefore, to overcome prior art to exist the defects of and deficiency, the present invention propose a kind of based on dot interlace acquisition mode
LED display bearing calibration.
Specifically, a kind of LED display bearing calibration based on dot interlace acquisition mode that the embodiment of the present invention proposes, including
Step：An IMAQ thread is opened to gather multiple first color images, multiple second color images and multiple the 3rd face
Color image；After first first color image has been gathered, the first graphical analysis thread is opened to start parallel parsing institute
State the first color image；After first second color image has been gathered, the second graphical analysis thread is opened to start simultaneously
Row analyzes second color image；After first the 3rd color image has been gathered, the 3rd graphical analysis thread is opened
To start the 3rd color image described in parallel parsing；Wherein, the second graphical analysis thread and the 3rd graphical analysis line
Journey is opened during the first color image described in described first image analysis thread parallel parsing.
It is individual in one embodiment of the invention, above-mentioned IMAQ thread first gather multiple described first color images,
Multiple described second color images are gathered again, finally gather multiple described the 3rd color images.
Individual in one embodiment of the invention, above-mentioned IMAQ thread intersects multiple described first color diagrams of collection
Picture, multiple described second color images and multiple described the 3rd color images.
In addition, a kind of LED display bearing calibration based on dot interlace acquisition mode that another embodiment of the present invention proposes, bag
Include step：An IMAQ thread is opened to intersect the monochrome image of multiple different colours of collection；Gathering first institute
A graphical analysis thread is opened after stating monochrome image, while often starting to gather next monochrome image to carry out graphical analysis
Until first monochrome image analysis finishes, the total number Z of wherein described image analysis thread meets relational expression：IntZ=
(int) [(Y+X)/X], Y are 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 above-mentioned different colours includes multiple first color diagrams
Picture, multiple second color images and multiple the 3rd color images.
From the foregoing, it will be observed that the embodiment of the present invention can be gathered and be analyzed the time of image with parallel processing, so as to shorten correction
Time, improve correction efficiency.
By the detailed description below with reference to accompanying drawing, other side of the invention and feature become obvious.But it should know
Road, the accompanying drawing is only the purpose design explained, not as the restriction of the scope of the present invention, because it should refer to
Appended claims.It should also be noted that unless otherwise noted, it is not necessary to which scale accompanying drawing, they only try hard to concept
Ground illustrates structure and flow described herein.
Brief description of the drawings
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
Fig. 1 is the IMAQ and analysis process schematic of first embodiment of the invention.
Fig. 2 is the IMAQ and analysis process schematic of second embodiment of the invention.
Fig. 3 is the IMAQ and analysis process schematic of third embodiment of the invention.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, below in conjunction with the accompanying drawings to the present invention
Embodiment be described in detail.
An object of the present invention is to propose a kind of LED display bearing calibration based on dot interlace acquisition mode, to carry
High LED display corrects efficiency, and this method shortens the processing of flow using IMAQ and the principle of graphical analysis parallel processing
Time, improve efficiency.Specifically, in following each embodiments of the present invention it is adapted for carrying out that the computer of correction software is being installed
On, an IMAQ thread is started by correction software and obtains image and the startup multiple images point that image capture device gathers
Analyse thread and carry out graphical analysis, and then realize the LED display bearing calibration proposed by the present invention based on dot interlace acquisition mode.
【First embodiment】
First embodiment of the invention is gathered using RGB respectively, IMAQ with being carried out by the way of analysis parallel processing,
It is specific as follows：
If LED display resolution ratio is 256 × 256 and is 2 to the drainage pattern of LED display progress dot interlace collection image
× 2 (namely the cell size of division is 2 × 2 LED pixel points), monochrome collection need to gather 2*2=4 images altogether；It is red green
All collection needs to gather 3*4=12 images blue three colors.It is noted that the LED display of the present embodiment is every
One LED pixel o'clock 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 3s；
It is then according to processing mode of the prior art：
The IMAQ of single color, analysis finish, and just carry out IMAQ and the analysis of next color.
The image acquisition time of single color is：The analysis time of the single colors of 4*1s=4s is：4*3s=12s；
The IMAQs of three colors and analysis total time be：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 collection since second red image, red image starts parallel parsing；
(E13) after four red image collections, continue to gather green image；When having gathered first green image,
Now green image starts parallel parsing；
(E14) when having gathered first blue image, blue image starts parallel parsing；
(E15) when four blue images, all analysis finishes, and flow finishes.
The processing mode of first embodiment of the invention is then：
After red first IMAQ, graphical analysis is parallel with collection；
The image acquisition time of three colors is：3*4s=12s, the IMAQ of single color and analysis time be：4*
3s+1s=13s；
The IMAQ of three colors and analysis total time：9s+ (4*3s)=21s, as shown in Figure 1；Wherein, 9s is blueness
Time after first IMAQ, 4*3s are the time of four blue image analyses.
Contrasted more than, when using minimum 2 × 2 dot interlaces collection, gathered respectively using RGB, parallel processing
Mode, improved efficiency 48s-21s=27s；If the resolution ratio of LED display is bigger, dot interlace number is more, the efficiency lifted
It is more obvious.
【Second embodiment】
First embodiment of the invention intersects collection, IMAQ with being carried out by the way of analysis parallel processing using RGB,
It is specific as follows：
If LED display resolution ratio is 256 × 256, and the drainage pattern that dot interlace collection image is carried out to LED display is
2 × 2, monochrome collection need to gather 2*2=4 images altogether；All collection needs to gather 3*4=12 figures three colors of RGB
Picture.It is noted that each LED pixel o'clock of the LED display of the present embodiment by a red LED lamp point, one it is green
Color LED point and a blue LED lamp point composition.
If the acquisition time of an image is 1s, analysis time 3s；
The overall flow of second embodiment of the invention is as shown in Fig. 2 be specially：
(E21) start to gather first red image；
(E22) first red image collection finishes, and starts to gather first green image, and first red image is opened
Beginning parallel parsing (namely first red image analysis 1s)；
(E23) first green image collection finishes, and starts to gather first blue image, first green image starts
Parallel parsing (namely first green image analysis 1s), while first red image is also in parallel parsing (namely first
Open red image analysis 2s)；
(E24) first blue image starts parallel parsing (namely first blue image analysis 1s), while first
Open green image analysis and also also analyze (analysis 3s), red point in analysis (analysis 2s), first red image analysis
Analysis finishes；
(E25) next Zhang Hongse, green, blue image collection are started, it is more than logical AND identical；
(E26) when the analysis of all red images finishes, green image delay 1s analyses finish, blue image delay 2s analyses
Finish, whole flow process finishes.
The processing mode of second embodiment of the invention is：
After first IMAQ, 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 are that single color acquisition 4 opens image, 3
The IMAQ total time of kind of color, 2s are the two kinds of colors finally handled respective required residual image analysis time.
The IMAQ of three colors and analysis total time：1s+14s=15s, as shown in Figure 2.
As can be seen here, gathered when using minimum 2 × 2 dot interlaces, by the way of RGB intersects collection, parallel processing, effect
Rate is promoted to 48s-15s=33s；If the resolution ratio of LED display is bigger, dot interlace number is more, the efficiency lifted is more obvious.
【3rd embodiment】
Third embodiment of the invention is carried out by the way of RGB intersects collection, alternate analysis, multi-threading parallel process,
It is specific as follows：
If LED display resolution ratio is 256 × 256, and the drainage pattern that dot interlace collection image is carried out to LED display is
2 × 2, monochrome collection need to gather 2*2=4 images altogether；All collection needs to gather 3*4=12 figures three colors of RGB
Picture.It is noted that each LED pixel o'clock of the LED display of the present embodiment by a red LED lamp point, one it is green
Color LED point and a blue LED lamp point composition.
The overall flow of third embodiment of the invention is as shown in figure 3, be specially：
(E31) collection that IMAQ 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 for subsequently starting graphical analysis thread is handled in the way of int Z=(int) [(Y+X)/X], its
In, Y represent an image analysis time, X represent an image acquisition time, Z represent ratio result integer part and
For the total number of the graphical analysis thread started in whole flow process；
(E35) as long as the graphical analysis thread for having the image gathered but not had been turned on, which takes, just starts new figure
As analysis thread；
(E36) all analyze and finish when all images, whole flow process terminates.
The processing mode of third embodiment of the invention：
Assuming that acquisition time X=0.9s, the analysis time Y=4s of an image of an image, start analysis thread
Number int Z=(int) [(4+0.9)/0.9]=5；
After gathering first image, from second IMAQ while, first graphical analysis thread starts.
The collection of 5 images has been completed in first graphical analysis while finishing, therefore is opened in the first graphical analysis thread
Other 4 graphical analysis threads of sequential start after dynamic, wherein, the startup time of second graphical analysis thread is 1.8s, the
The startup time of three graphical analysis threads is 2.7s, and startup time of the 4th graphical analysis thread is 3.6s, the 5th
The startup time of individual graphical analysis thread is 4.5s；
The color for the image analyzed successively determines according to the color gathered successively；
Analyze successively until all graphical analyses finish end.
As can be seen from Figure 3, the collection of all images and the total time needed for analysis are 14.8s.
More foregoing first, second, and third embodiment：
(a) from CPU and EMS memory occupation angle：
The hardware resource that first embodiment takes is minimum, but four threads (namely an IMAQ thread and three figures
As analysis thread) parallel processing time it is most short, be applicable for the low computer of hardware configuration；
For second embodiment in the case where the time of graphical analysis and collection is less than 3 times of ratios, the resource occupation of hardware is moderate；
3rd embodiment is bigger in the time ratios of graphical analysis and collection, and the consumption to hardware resource is bigger.
(b) from the angle of efficiency：
In the case where not considering hardware resource consumption, the efficiency highest of 3rd embodiment, second embodiment is taken second place, and first
Embodiment is minimum.
Finally, it is also found that general character existing for first embodiment and second embodiment has from Fig. 1, Fig. 2 and Fig. 3：Often
One graphical analysis thread only carries out the analysis of single color image；General character existing for second embodiment and 3rd embodiment has：
The image of a variety of colors intersects collection.
Furthermore point of RGB tristimulus images is carried out by any embodiment in foregoing first, second, and third embodiment
Brightness or the light tone angle value of RGB three-color LED pixels on LED display are can obtain after analysis, afterwards using resulting bright
Difference between degree or light tone angle value (namely brightness or bright chroma initial value) and correction object brightness or light tone angle value can obtain
The brightness of each LED pixel point on to LED display or bright chroma correction coefficient.
In addition, it is necessary to explanation, the present invention are not limited to be applied to RGB three-primary color LED display screens, can also be applied to
The LED display of more multiple bases；Furthermore the viewing area corresponding to individual color image is not limited to the whole of LED display
Viewing area or partial display area.
In summary, the embodiment of the present invention can be gathered and be analyzed the time of image with parallel processing, so as to shorten correction
Time, improve correction efficiency.
So far, specific case used herein is to the LED display school proposed by the present invention based on dot interlace acquisition mode
The principle and embodiment of correction method are set forth, and the explanation of above example is only intended to help the method for understanding the present invention
And its core concept；Meanwhile for those of ordinary skill in the art, according to the thought of the present invention, in embodiment and
There will be changes in application, in summary, this specification content should not be construed as limiting the invention, the present invention
Protection domain should be defined by appended claim.
Claims (5)
1. a kind of LED display bearing calibration based on dot interlace acquisition mode, it is characterised in that including step：
An IMAQ thread is opened to gather multiple first color images, multiple second color images and multiple the 3rd colors
Image；
After first first color image has been gathered, the first graphical analysis thread is opened to start described in parallel parsing the
One color image；
After first second color image has been gathered, the second graphical analysis thread is opened to start described in parallel parsing the
Second colors image；
After first the 3rd color image has been gathered, the 3rd graphical analysis thread is opened to start described in parallel parsing the
Three color images；
Wherein, the picture analysis time of each color images of Zhang Suoshu first is more than image acquisition time, each Zhang Suoshu second
The picture analysis time of color image is more than image acquisition time, and the picture analysis time of each color images of Zhang Suoshu the 3rd is big
In image acquisition time, the second graphical analysis thread and the 3rd graphical analysis thread are all in described first image point
Analysis thread parallel is opened during analyzing first color image, described first image analysis thread, second image
Each graphical analysis thread in analysis thread and the 3rd graphical analysis thread only carries out a kind of analysis of color image.
2. the LED display bearing calibration based on dot interlace acquisition mode as claimed in claim 1, it is characterised in that the figure
As described in first gathering collecting thread multiple first color images, gather again described in multiple second color images, finally collection described in
Multiple the 3rd color images.
3. the LED display bearing calibration based on dot interlace acquisition mode as claimed in claim 1, it is characterised in that the figure
As collecting thread intersects collection described multiple first color images, multiple described second color images and multiple described the 3rd colors
Image.
4. a kind of LED display bearing calibration based on dot interlace acquisition mode, it is characterised in that including step：
An IMAQ thread is opened to intersect the monochrome image of multiple different colours of collection；
After first monochrome image has been gathered, an image point is opened while often starting to gather next monochrome image
Analysis thread is to carry out graphical analysis until first monochrome image analysis finishes, and wherein described image analyzes the sum of thread
Mesh Z meets relational expression：IntZ=(int) [(Y+X)/X], X are the image acquisition time of individual monochrome image, and Y is monochromatic for individual
The picture analysis time of image, and Y is more than X；
Wherein, the unlocking condition of described image analysis thread is：As long as there is the monochrome image gathered but do not opened
The graphical analysis thread opened takes, and is switched on new graphical analysis thread.
5. the LED display bearing calibration based on dot interlace acquisition mode as claimed in claim 4, it is characterised in that described more
Opening the monochrome image of different colours includes 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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