CN103426403B - The correction image-pickup method of LED display, picture display process and bearing calibration - Google Patents
The correction image-pickup method of LED display, picture display process and bearing calibration Download PDFInfo
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Abstract
The invention provides a kind of correction image acquiring method and picture display process of LED display, this correction image acquiring method comprises step: the region to be corrected display calibration reference picture controlling LED display, for surround lighting when collecting reflection image acquisition to the rectified reference image of the annoyance level of the picture that LED display shows; The region to be corrected display controlling LED display corrects picture, for collecting correction initial pictures; And the ambient light interference utilizing rectified reference image removal correction initial pictures to comprise.The present invention also provides the LED display bearing calibration adopting above-mentioned acquisition methods.The present invention shows and takes calibration reference picture to obtain the rectified reference image of reflection ambient light interference degree in correction image acquisition procedures, this rectified reference image can be used to weaken or remove image acquisition process ambient light to the interference of display frame, thus still can realize the good calibration result of LED display when surround lighting is stronger.
Description
Technical field
The present invention relates to the alignment technique field of LED display, be specifically related to a kind of correction image-pickup method of LED display, picture display process and bearing calibration.
Background technology
LED display point-to-point correction system, has been coordinated by " control system " and " point-to-point correction system " two systems, and wherein point-to-point correction system is responsible for " generation correction coefficient ", and control system is responsible for " application correction coefficient ".Corrective system is taken pictures with acquisition correction image to the picture that LED display shows by mm professional camera special, obtains brightness and the color of each LEDs, generates correction coefficient for each pixel, then correction coefficient is given control system and preserves.Control system operationally, for the picture material of each pixel, completes multiplying at a high speed with correction coefficient, thus completes pointwise correction.
But, the collection of existing LED display correction image, mostly carry out at night or in darkroom, because the surround lighting in evening or darkroom is zero substantially, less to the brightness disturbing effect of the correction image collected, the brightness of the correction image also namely collected is the intrinsic brilliance of picture equaling display screen display substantially, and therefore outdoor field engineer carries out analysis after directly can gathering the monochromatic or solid-color image such as the red, green, blue of LED and obtains pixel correction coefficient.But at dusk, daytime or there are other surround lightings (such as street lamp) when disturbing, because ambient light interference is comparatively large, may to correct or calibration result can decline greatly.
Summary of the invention
For overcoming the technological deficiency that prior art exists, the invention provides a kind of correction image acquiring method of LED display, picture display process and bearing calibration, can weaken or remove the impact of ambient light interference on correction image acquisition.
Particularly, the correction image acquiring method of a kind of LED display that the embodiment of the present invention provides, comprise step: the region display calibration reference picture to be corrected controlling LED display, for collecting rectified reference image, during described rectified reference image reflection image acquisition, surround lighting is to the annoyance level of the picture of the region to be corrected display of LED display; The region to be corrected display controlling LED display corrects picture, for collecting correction initial pictures; And utilize rectified reference image to remove ambient light interference that correction initial pictures comprises and obtain required correction image.
In addition, the picture display process of a kind of LED display that the embodiment of the present invention provides, comprise step: at the appointed area of LED display display reference picture, for collecting reference picture, when wherein reference picture representative image gathers, surround lighting is to the annoyance level of the picture that LED display appointed area shows; And at the appointed area of LED display display monochrome or pure color picture, for collecting initial pictures, thus the ambient light interference that reference picture removal initial pictures comprises can be utilized.
In addition, the bearing calibration of a kind of LED display that the embodiment of the present invention provides, comprises step: utilize the correction image needed for the acquisition of above-mentioned correction image acquiring method; And utilize the correction coefficient of the multiple LED pixels of correction Computer image genration LED display got.
As from the foregoing, the present invention controls LED display display calibration reference picture and is undertaken collecting rectified reference image by image capture device in correction image acquisition procedures, this rectified reference image reflection ambient light interference degree, therefore utilize this rectified reference image can effectively weaken or remove the interference of image acquisition process ambient light to display frame, thus still can realize the good calibration result of LED display when surround lighting is stronger.
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
Fig. 1 is the process flow diagram of the correction image acquiring method of a kind of LED display of the embodiment of the present 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.
Refer to Fig. 1, it is the process flow diagram of the correction image acquiring method of a kind of LED display of the embodiment of the present invention.Below in conjunction with Fig. 1, the correction image acquiring method of the embodiment of the present invention is described in detail.
Particularly, the correction image acquiring method of the embodiment of the present invention comprises the following steps S110 to step S170.
Step S110: display location, the region to be corrected picture controlling LED display, for collecting location image, and determines the position of region to be corrected in the image of location.Particularly, location picture can be any display frame, only has and region to be corrected and its neighboring area can be made a distinction; At this, region to be corrected can be the viewing area of whole LED display, also can be other appointed areas, the viewing area that the viewing area that such as one or more casing is corresponding, one or more LED lamp panel are corresponding.
Step S130: the region to be corrected display calibration reference picture controlling LED display, for collecting rectified reference image, wherein during rectified reference image reflection image acquisition surround lighting to the annoyance level of the picture of the region to be corrected display of LED display.In the present embodiment, the collection of rectified reference image can be realized by image capture device such as mm professional camera special, is specially and image capture device is aimed at region to be corrected and takes calibration reference picture after setting parameter, thus obtain rectified reference image.Usually, the monochrome of carrying out different colours for follow-up or pure color correct picture when taking, the parameter that image capture device uses can be different, and such as, for shooting red-correction picture and green correction picture, the parameter that image capture device uses can be different; Therefore, the value of parameter used herein is decided by the color of the correction picture of follow-up display.Optimum configurations is herein such as the time shutter and/or the aperture size that arrange image capture device.In addition, preferably, calibration reference picture is black picture, and like this, the brightness of the rectified reference image collected just can think the brightness being equal to surround lighting, also i.e. ambient light interference amount; Certainly, calibration reference picture also can for brightness be close to the low gray scale picture of black picture, such as brightness value is less than the picture of 10% of the highest picture brightness, in such cases, the brightness of rectified reference image can substantially close to the brightness of surround lighting, and it also can think the annoyance level reflecting surround lighting to a certain extent.
Step S150: the region to be corrected display controlling LED display corrects picture, for collecting correction initial pictures.The collection of correction initial pictures is herein completed by above-mentioned image capture device, and the parameter value used when the parameter value used during image capture device acquisition correction initial pictures and above-mentioned acquisition correction reference picture is consistent, and effectively could improve calibration result like this.Correction picture is herein such as the pure color such as sprite or the white pictures such as red, green, blue.It is worth mentioning that, for sprite, mainly refer to that in region to be corrected, solid color LED is lit presented picture, for pure color picture, mainly to refer in region to be corrected the picture that two kinds and two or more color LED are lit back mixing light and present.
Step S170: utilize rectified reference image to remove ambient light interference that correction initial pictures comprises and obtain required correction image.Specifically can be: the brightness value of each pixel image data in correction initial pictures is deducted the brightness value of respective pixel view data in rectified reference image by correction software respectively that installed by the correcting computer connecting image capture device, thus obtain the pixel image data of required correction image, the correction image needed for also namely obtaining.
It should be noted that, the step S110 in above-mentioned correction image acquiring method, the sequencing of S130 and S150 do not limit, and can suitably exchange, and it can realize the object that the present invention weakens or removes ambient light interference equally.In addition, also can omit step S110, adopt manual type to determine the position of region to be corrected in the image collected.
It is worth mentioning that, in above-mentioned correction image acquiring method, the picture display process of LED display can be related to, take for image capture device to demonstrate required picture.In simple terms, the picture display process of the embodiment of the present invention roughly can be summarized as following steps: at the appointed area of LED display display reference picture, for collecting reference picture, during described reference picture reflection image acquisition, surround lighting is to the annoyance level of the picture that the appointed area of LED display shows; And at the appointed area of LED display display monochrome or pure color picture, for collecting initial pictures, thus the ambient light interference that reference picture removal initial pictures comprises can be utilized.
In addition, for realization is to the brightness in the region to be corrected of LED display and/or chromaticity correction, example (but the present invention is not as limit) is configured to by red (R), green (G), blue (B) three color LED with the single led pixel in LED display, can first perform above-mentioned steps S110 to S170 to obtain red LED correction image, perform step S130 to S170 again to obtain green LED correction image afterwards, and then perform step S130 to S170 to obtain blue led correction image; Red, green, blue three-color LED correction image can be obtained like this.Afterwards, the correction software in correcting computer utilizes the red, green, blue three-color LED correction image got can generate the correction coefficient of each LED pixel in the region to be corrected of LED display, such as brightness and/or chromaticity correction coefficient.It is worth mentioning that at this, in the process obtaining red, green, blue three-color LED correction image, the parameter that image capture device uses can be different and needs adjust accordingly.
In sum, the above embodiment of the present invention controls LED display display calibration reference picture and is undertaken collecting rectified reference image by image capture device in correction image acquisition procedures, this rectified reference image reflection ambient light interference degree, therefore utilize this rectified reference image can effectively weaken or remove the interference of image acquisition process ambient light to display frame, thus still can realize the good calibration result of LED display when surround lighting is stronger.
Apply specific case herein to set forth the principle of the correction image acquiring method of LED display of the present invention, picture display process and bearing calibration 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 (9)
1. a correction image acquiring method for LED display, is characterized in that, comprising:
Control the region display calibration reference picture to be corrected of described LED display, for collecting rectified reference image, during described rectified reference image reflection image acquisition, surround lighting is to the annoyance level of the picture of the region to be corrected display of described LED display;
The region described to be corrected display controlling described LED display corrects picture, for collecting correction initial pictures; And
Utilize described rectified reference image to remove ambient light interference that described correction initial pictures comprises and obtain required correction image;
Wherein, utilize described rectified reference image to remove ambient light interference that described correction initial pictures comprises and the step obtaining required correction image comprise:
The brightness value of each pixel image data in described correction initial pictures is deducted the brightness value of respective pixel view data in described rectified reference image respectively, and then obtains required correction image.
2. correction image acquiring method according to claim 1, is characterized in that, described calibration reference picture is black picture or low gray scale picture.
3. correction image acquiring method according to claim 1, is characterized in that, described correction picture is sprite or pure color picture.
4. correction image acquiring method according to claim 1, is characterized in that, also comprise step:
Control display location, the region described to be corrected picture of described LED display, for collecting location image; And
Determine the position of the region described to be corrected of described LED display in the image of described location.
5. a picture display process for LED display, is characterized in that, comprises step:
At the appointed area of described LED display display reference picture, for collecting reference picture, during described reference picture reflection image acquisition, surround lighting is to the annoyance level of the picture that the appointed area of described LED display shows; And
Monochromatic or the pure color picture in the display of the described appointed area of described LED display, for collecting initial pictures, thus the ambient light interference that reference picture can be utilized to remove described initial pictures comprise; Ambient light interference that described initial pictures comprises comprises wherein to utilize reference picture to remove: the brightness value of each pixel image data in described initial pictures is deducted the brightness value of respective pixel view data in described reference picture respectively.
6. picture display process according to claim 5, is characterized in that, described reference picture is black picture or low gray scale picture.
7. picture display process according to claim 5, is characterized in that, described picture display process is applied to brightness and/or the chromaticity correction of multiple LED pixels of described LED display.
8. a bearing calibration for LED display, is characterized in that, comprises step:
Utilize the correction image needed for the acquisition of correction image acquiring method as described in Claims 1-4 any one; And
The correction coefficient of multiple LED pixels of LED display described in the correction Computer image genration that utilization gets.
9. bearing calibration according to claim 8, is characterized in that, described correction coefficient is brightness and/or chromaticity correction coefficient.
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| CN105118411A (en) * | 2015-09-22 | 2015-12-02 | 京东方科技集团股份有限公司 | Display screen detection method and device |
| CN105185314B (en) * | 2015-10-13 | 2017-12-08 | 西安诺瓦电子科技有限公司 | LED display uniformity compensation method |
| CN105654898B (en) * | 2016-02-25 | 2018-09-21 | 西安诺瓦电子科技有限公司 | Image capture device is imaged moire fringes suppressing method and its application |
| CN106448546B (en) * | 2016-11-16 | 2018-11-30 | 西安诺瓦电子科技有限公司 | Automatically adjust the method and LED bright chroma bearing calibration of imaging surface product size |
| CN107818753A (en) * | 2017-11-22 | 2018-03-20 | 广东欧珀移动通信有限公司 | Screen brightness regulation method, device, storage medium and electronic equipment |
| CN109637434A (en) * | 2018-12-29 | 2019-04-16 | 深圳市奥拓电子股份有限公司 | Bearing calibration, correction system and the machine readable storage medium of mosaic display screen |
| CN112116888B (en) * | 2019-06-21 | 2024-01-30 | 北京小米移动软件有限公司 | Screen calibration method, calibration device and storage medium |
| WO2021212394A1 (en) * | 2020-04-23 | 2021-10-28 | 长春希达电子技术有限公司 | Method for collection and correction of display unit |
| CN112599075B (en) * | 2020-05-28 | 2022-03-22 | 西安诺瓦星云科技股份有限公司 | Display module correction method, device and system |
| CN112561810B (en) * | 2020-12-07 | 2023-09-08 | 西安诺瓦星云科技股份有限公司 | Light-mixing removing method and device for display screen, storage medium and processor |
| CN113709949B (en) * | 2021-08-20 | 2023-11-03 | 深圳市智岩科技有限公司 | Lighting device control method and device, electronic device and storage medium |
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| JP2001134234A (en) * | 2000-09-12 | 2001-05-18 | Nichia Chem Ind Ltd | Display device and lighting method for led display unit |
| JP3870807B2 (en) * | 2001-12-20 | 2007-01-24 | ソニー株式会社 | Image display device and manufacturing method thereof |
| CN101692326B (en) * | 2009-09-01 | 2011-10-19 | 惠州市德赛智能科技有限公司 | System and method for on-site point-by-point calibration of brightness and chrominance of the whole screen of LED display screen |
| CN101950515B (en) * | 2010-08-20 | 2015-12-02 | 深圳市中庆微科技开发有限公司 | A kind of LED display pointwise correction method of master slave mode |
| CN101916539B (en) * | 2010-08-20 | 2012-10-03 | 西安诺瓦电子科技有限公司 | System and method for correcting brightness and chromaticity of LED display screen point by point |
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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. |