CN106652898B - LED shows pointwise correction method - Google Patents
LED shows pointwise correction method Download PDFInfo
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- CN106652898B CN106652898B CN201710077328.7A CN201710077328A CN106652898B CN 106652898 B CN106652898 B CN 106652898B CN 201710077328 A CN201710077328 A CN 201710077328A CN 106652898 B CN106652898 B CN 106652898B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
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Abstract
The present invention proposes that a kind of LED shows pointwise correction method, and acquiring multiple corner positions that LED display to be corrected is shown is had the specified image of different display features and established the Image display position of acquisition and the relationship of acquisition image physical location based on collected specified image；Later collected correction adaptively rotate with image using this kind of relationship established to obtain target correction with image and carry out image analysis and correction coefficient and calculate to be used for subsequent.Therefore, the present invention only needs the relationship for more clapping Image display position and acquisition image physical location that an image can automatically judge acquisition, guarantee that the LED light point position on the correction coefficient calculated and LED display to be corrected corresponds, to have the advantages such as correction rate is fast, high-efficient and accuracy rate is high.
Description
Technical field
The present invention relates to LED to show that alignment technique field more particularly to a kind of LED show pointwise correction method.
Background technique
The brightness of LED display, coloration consistency have been largely fixed the image displaying quality of LED display, by
Select the links such as lamp, welding, structure design, heat dissipation, brightness decay all may influence display screen not in LED display
Consistency is always a great problem in industry which results in the brightness of LED display, coloration consistency, in this background
Under, LED display pointwise correction technical application and give birth to, this kind of pointwise correction technology looks for another way, it is there is no in display screen
Manufacture link is intervened, but brightness, coloration are measured and analyzed in display screen manufacture terminal, and calculates compensation system
Number (or bright chroma correction coefficient), improves brightness, the coloration consistency of LED display, so as to improve the image of LED display
Quality.The equipment of general acquisition data is area array cameras, including digital camera, industrial camera, mobile phone etc..
Under normal circumstances, area array cameras be all with LED display face, and area array cameras acquisition the image upper left corner with
The LED display upper left corner is corresponding, as long as the data in this case carrying out acquisition carry out bright chroma information extraction, but some
In the case of can not accomplish area array cameras acquisition the image upper left corner it is corresponding with the LED display upper left corner, as shown in Figure 1, a LED
The screen body of display screen is configured to the upper left corner that A shows image, but for its physical location, A is the lower left corner, with area array cameras face
A is acquiring the image physical location lower left corner after shooting, even if by the physics upper left angular alignment A of area array cameras, most of face battle array phases
Machine can also rotate automatically image according to the algorithm of its own, and acquired image is still that A is acquiring the image physical location lower left corner,
If directly analyzing data at this time, calculated correction coefficient and LED light point physical location are not one-to-one later.
Again for example shown in Fig. 2, there are many screens body (such as canopy of the heavens) to be disposed upon roof, it is parallel with ground basic horizontal,
Need at this time the area array cameras elevation angle shoot, the image taken may just be it is anti-, at this time directly analysis data calculating school
Positive coefficient is also not one-to-one.
During pointwise correction in the prior art, the red, green, blue image of pure color is shown in LED display, not
It can find image display problem, just find that calibration result is undesirable after only having uploaded correction coefficient after calibration；It is either aobvious
Diagram seems normal, but since putting for area array cameras causes acquired image to overturn, such case also only exists
After having uploaded correction coefficient after correction, just find that calibration result is undesirable.
After discovery calibration result is undesirable or adjusts the position of display screen and area array cameras and resurvey image calibration
Just or again reach correction coefficient by way of handling correction coefficient and LED light point physical location corresponds；Such one
Come, entire correction course just becomes relatively complicated.
Summary of the invention
Therefore, to overcome the shortcomings of existing technologies and insufficient, the present invention proposes that a kind of LED shows pointwise correction method.
Specifically, a kind of LED that the embodiment of the present invention proposes shows pointwise correction method, comprising steps of (a) control is to school
Positive LED display shows specified image, wherein multiple corner positions of the specified image have different display features；(b) it adopts
Collect the specified image and establishes the Image display position and acquisition image physics of acquisition based on the collected specified image
The relationship of position；(c) LED display to be corrected is controlled to show correction image and acquire the correction image；(d) base
In foundation acquisition Image display position and acquisition image physical location relationship, to the collected correction image into
Row is adaptive to be rotated so that the Image display position of the collected correction image is consistent with image physical location is acquired,
To obtain target correction image；And the LED display to be corrected (e) is obtained with image based on the target correction
Brightness or bright chroma correction coefficient and the hardware for being sent to the LED display to be corrected is stored.
In one embodiment of the invention, the different display features are different display contents.
In one embodiment of the invention, the different display features are different display colors.
In one embodiment of the invention, the different display features are different display brightness.
In one embodiment of the invention, step (b) includes: the collected specified figure of response corrections personal identification
The input done as after, which is operated, marks multiple corner positions on the collected specified image to indicate collected described
The Image display position of specified image；And Image display position and the acquisition of acquisition are established according to the multiple corner positions marked
The relationship of image physical location.
In one embodiment of the invention, step (b) includes: to be had according to multiple corner positions of the specified image
Some different display Automatic feature recognitions go out the Image display position of the collected specified image and establish the image of acquisition
The relationship of display position and acquisition image physical location.
In one embodiment of the invention, in step (e), the hardware of the LED display to be corrected is to receive card.
From the foregoing, it will be observed that the embodiment of the present invention only needs mostly one image of bat that can automatically judge that the image of acquisition shows position
The relationship of (such as with each corner position mark of image) with acquisition image physical location is set, to guarantee the correction calculated
LED light point position on coefficient and LED display to be corrected corresponds；Correction rate is fast, high-efficient and accuracy rate is high.
Through the following detailed description with reference to the accompanying drawings, other aspects of the invention and feature become obvious.But it should know
Road, which is only the purpose design explained, not as the restriction of the scope of the present invention.It should also be noted that unless another
It points out outside, it is not necessary to which scale attached drawing, they only try hard to conceptually illustrate structure and process described herein.
Detailed description of the invention
Below in conjunction with attached drawing, specific embodiments of the present invention will be described in detail.
Fig. 1 and Fig. 2 is that the Image display position of area array cameras acquisition and acquisition image physical location are different in the prior art
The schematic diagram of cause.
The particular image schematic diagram that Fig. 3 shows for LED display to be corrected in second embodiment of the invention.
Fig. 4 A and 4B are the different location status diagram of the acquisition image obtained when acquiring image shown in Fig. 3.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
The embodiment of the present invention proposes a kind of method for judging acquisition image and whether having rotation, by aobvious in pointwise correction early period
Show particular image, acquire and analyze particular image, determines corner position (the corresponding acquisition image physics of LED display to be corrected
Position) with acquisition Image display position relationship, then subsequent all collected correction image adaptives are rotated,
To guarantee subsequent calculated correction coefficient such as brightness correction coefficients or bright chroma correction coefficient and LED display to be corrected
On LED light point position be one-to-one.The embodiment of the present invention for ease of understanding, below in conjunction with first embodiment and second
Relationship of the embodiment to the Image display position for how determining acquisition image physical location and acquisition.
[first embodiment]
(1) it controls LED display to be corrected and shows computer desktop, computer desktop herein is as aforementioned particular image；
(2) image when LED display to be corrected shows computer desktop is acquired using area array cameras；
(3) it is shown on host computer and utilizes area array cameras acquired image in step (2)；
(4) correction personnel are based on acquired image in for example different displays of different display features of each corner position
Hold, each corner position of image is marked on acquired image (by taking rectangle screen as an example), namely input and operate according to user
Mark the Image display position of acquisition；
(5) relationship of the Image display position of correction software record acquisition and acquisition image physical location, such as acquisition
The lower left corner (referring to Fig. 1) in the corresponding acquisition image physical location of upper left corner A in Image display position；
(6) it controls LED display to be corrected and shows the corrections images such as red, green, blue solid-color image, school according to preset order
Positive software is adaptive respectively according to the relationship of the Image display position of the acquisition recorded in step (5) and acquisition image physical location
The correction for answering rotating acquisition to arrive is extremely consistent with acquisition image physical location with image, then extracts bright chroma information respectively, calculates
Correction coefficient such as brightness correction coefficients or bright chroma correction coefficient out；Bright chroma information is extracted herein and calculates correction coefficient
For this field mature technology, therefore details are not described herein；
(7) hardware for sending the correction coefficient to the LED display to be corrected that are calculated for example receives card and is stored.
In aforementioned first embodiment, correction personnel can clearly judge the image of acquisition according to computer desktop content
On each corner position Image display position of acquisition (corresponding) and input correction software to establish the image of acquisition automatically
The relationship of display position and acquisition image physical location, but need it is artificial participate in being assisted, operating, opposite some are cumbersome.
[second embodiment]
(i) correction software controls LED display to be corrected and shows particular image, as shown in figure 3, allowing display screen to be corrected
Four corner positions of (by taking rectangle screen as an example) are displayed in red respectively, green, blue, white four kinds of colors, then collected figure
Red is the upper left corner as in, green is the upper right corner, blue is the lower left corner, white is the lower right corner；
(ii) particular image that LED display to be corrected is shown is acquired using area array cameras to obtain acquisition image, acquisition
Image display position be likely to occur situation as shown in fig. 4 a or fig. 4b；
(iii) according to the red of acquisition image, green, the relationship of blue three components, judge which block is shown
Green, blue and white is shown in red, which block, so that it is determined that each image apex angle and acquisition on the image of acquisition
The relationship of image physical location；In Figure 4 A, the Image display position of acquisition is relative to acquisition image physical location along inverse clock
Direction has rotated 90 degree, by taking red image as an example, has rotated to the lower left corner in Fig. 4 A from the upper left corner；And in figure 4b, it adopts
The Image display position of collection has rotated 180 degree along counterclockwise relative to acquisition image physical location, is still with red image
Example, has rotated to the lower right corner shown in Fig. 4 B from the upper left corner；
(iv) relationship of the Image display position of correction software record acquisition and acquisition image physical location；
(v) it controls LED display to be corrected and shows the corrections images such as red, green, blue solid-color image, school according to preset order
Positive software is adaptive respectively according to the relationship of the Image display position of the acquisition recorded in step (iv) and acquisition image physical location
The correction for answering rotating acquisition to arrive is extremely consistent with acquisition image physical location with image, such as needs if there is situation shown in Fig. 4 A
Collected correction is rotated by 90 ° with image clockwise, is similarly needed collected correction if there is situation shown in Fig. 4 B
180 degree is rotated with image clockwise, bright chroma information is extracted respectively again later, calculates correction coefficient such as brightness correction coefficients
Or bright chroma correction coefficient；Extracting bright chroma information herein and calculating correction coefficient is this field mature technology, therefore herein not
It repeats again；
(vi) hardware for sending the correction coefficient to the LED display to be corrected that are calculated for example receives card and is stored.
In conclusion the embodiment of the present invention only needs mostly one image of bat that can automatically judge that the image of acquisition shows position
The relationship of (such as with each corner position mark of image) with acquisition image physical location is set, to guarantee the correction calculated
LED light point position on coefficient and LED display to be corrected corresponds；Correction rate is fast, high-efficient and accuracy rate is high.
Finally it is worth mentioning that the particular image that the embodiment of the present invention is shown can be any image, as long as collecting
Image can be used to significantly identify acquisition Image display position and acquisition image physical location relationship, such as
Multiple corner positions show the displays such as different other colors or different brightness (such as display same color but different gray scales)
Feature.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
It is right according to the technical essence of the invention for the equivalent embodiment of equivalent variations, but without departing from the technical solutions of the present invention
Any simple modification, equivalent change and modification made by above embodiments, all of which are still within the scope of the technical scheme of the invention.
Claims (7)
1. a kind of LED shows pointwise correction method, which is characterized in that comprising steps of
(a) it controls LED display to be corrected and shows specified image, wherein multiple corner positions of the specified image have difference
Show feature；
(b) it acquires the specified image and establishes Image display position and the acquisition of acquisition based on the collected specified image
The relationship of image physical location；
(c) LED display to be corrected is controlled to show correction image and acquire the correction image；
(d) relationship of the Image display position of the acquisition based on foundation and acquisition image physical location, to the collected school
Image display position and acquisition image physics so that the collected correction image are just adaptively rotated with image
Position is consistent, to obtain target correction image；And
(e) brightness for obtaining the LED display to be corrected with image based on the target correction or bright chroma correction coefficient are simultaneously
The hardware for being sent to the LED display to be corrected is stored.
2. LED as described in claim 1 shows pointwise correction method, which is characterized in that the different displays in step (a)
Feature is different display content.
3. LED as described in claim 1 shows pointwise correction method, which is characterized in that the different displays in step (a)
Feature is different display color.
4. LED as described in claim 1 shows pointwise correction method, which is characterized in that the different displays in step (a)
Feature is different display brightness.
5. LED as described in claim 1 shows pointwise correction method, which is characterized in that step (b) includes:
The input done after the collected specified image of response corrections personal identification is operated in the collected specified figure
Multiple corner positions are marked on picture to indicate the Image display position of the collected specified image；And
The Image display position of acquisition and the relationship of acquisition image physical location are established according to the multiple corner positions marked.
6. LED as described in claim 1 shows pointwise correction method, which is characterized in that step (b) includes:
According to difference possessed by multiple corner positions of the specified image show Automatic feature recognition go out it is collected described in
The Image display position of specified image simultaneously establishes the Image display position of acquisition and the relationship of acquisition image physical location.
7. LED as described in claim 1 shows pointwise correction method, which is characterized in that described to be corrected in step (e)
The hardware of LED display is to receive card.
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| CN201710077328.7A CN106652898B (en) | 2017-02-14 | 2017-02-14 | LED shows pointwise correction method |
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| CN201710077328.7A CN106652898B (en) | 2017-02-14 | 2017-02-14 | LED shows pointwise correction method |
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| CN113496670B (en) * | 2020-03-20 | 2022-04-08 | 西安诺瓦星云科技股份有限公司 | Image processing method, device and system |
| JP2022545991A (en) | 2020-07-30 | 2022-11-02 | 深▲せん▼市艾比森光電股▲ふん▼有限公司 | LED display correction method and related device |
| CN111951696B (en) * | 2020-07-30 | 2022-10-25 | 深圳市艾比森光电股份有限公司 | Correction method and related device for LED display screen |
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| JP2000261701A (en) * | 1999-03-04 | 2000-09-22 | Canon Inc | Display device and photographing device provided with it |
| JP5716222B2 (en) * | 2011-05-13 | 2015-05-13 | 株式会社Pfu | Image reading apparatus, image processing method, and program |
| CN102685366A (en) * | 2012-04-01 | 2012-09-19 | 深圳市锐明视讯技术有限公司 | Method, system and monitoring device for automatic image correction |
| KR101356015B1 (en) * | 2012-06-15 | 2014-01-29 | 전자부품연구원 | An apparatus for correcting three dimensional display using sensor and a method thereof |
| CN102768816B (en) * | 2012-07-30 | 2015-09-23 | 西安诺瓦电子科技有限公司 | LED display automated correction method |
| CN104882098B (en) * | 2015-06-08 | 2018-07-10 | 广东威创视讯科技股份有限公司 | Method for correcting image and imaging sensor based on LED mosaic display screens |
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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 Nova Nebula Technology 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: Xian Novastar Electronic Technology Co., Ltd. |
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