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公开(公告)号：US10726776B2
公开(公告)日：2020-07-28
申请号：US16388893
申请日：2019-04-19
发明人： Jingguo Zong , Xingmei Zhao , Cheng Yang
摘要： A pixel-by-pixel calibration method is provided. Multiple sample cabinets are selected from to-be-calibrated cabinets to form a small screen with the sample cabinets, image acquisitions are performed on the small screen and luminance-chrominance mean deviation ratios are calculated. The sample cabinets are placed at fulcrum positions of a large screen to be calibrated, and the other remaining cabinets are placed at other positions. Full-screen original luminance-chrominance values are obtained by image acquisition on the large screen, original luminance-chrominance values of the sample cabinets are adjusted by the luminance-chrominance mean deviation ratios, and luminance-chrominance distribution fitting surfaces are generated by adjusted full-screen original luminance-chrominance values to amend the full-screen original luminance-chrominance values. Amended full-screen luminance-chrominance values are used as luminance-chrominance initial values and luminance-chrominance target values are set, and full-screen pixel-by-pixel calibration coefficients of the large screen are obtained. The effect of arbitrarily splicing LED cabinets after calibration can be achieved.
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公开(公告)号：US09842389B2
公开(公告)日：2017-12-12
申请号：US15585193
申请日：2017-05-03
发明人： Xingmei Zhao
CPC分类号： G06T7/001 , G06T7/90 , G06T2207/10024 , G09G3/32 , G09G2300/04 , G09G2320/0233 , G09G2320/0242 , G09G2320/0693
摘要： A luminance-chrominance calibration production line system includes: a rail; multiple stations disposed along the rail and including multiple first darkroom stations; multiple image acquisition apparatuses respectively disposed in the first darkroom stations and for capturing different color images sequentially displayed by a to-be-calibrated LED display module loaded on the rail to acquire color image data; and a rail computer system for controlling a transport movement on the rail and controlling the to-be-calibrated LED display module to display the different color images, and being signally connected to the image acquisition apparatuses to obtain the color image data. By using multiple image acquisition apparatuses to collect various color image information of LED display module in pipelined manner, calibration efficiency is improved, data collection is accurate, data collection error caused by using different image acquisition apparatuses to calibrate different LED display modules is avoided and calibration manpower is reduced.
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公开(公告)号：US09672768B2
公开(公告)日：2017-06-06
申请号：US14740164
申请日：2015-06-15
发明人： Xingmei Zhao
IPC分类号： G09G3/32
CPC分类号： G06T7/001 , G06T7/90 , G06T2207/10024 , G09G3/32 , G09G2300/04 , G09G2320/0233 , G09G2320/0242 , G09G2320/0693
摘要： A luminance-chrominance calibration production line includes: a rail; multiple stations disposed along the rail and including multiple first darkroom stations; multiple image acquisition apparatuses respectively disposed in the first darkroom stations and for capturing different color images sequentially displayed by a to-be-calibrated LED display module loaded on the rail to acquire color image data; and a rail computer system for controlling a transport movement on the rail and controlling the to-be-calibrated LED display module to display the different color images, and being signally connected to the image acquisition apparatuses to obtain the color image data. By using multiple image acquisition apparatuses to collect various color image information of LED display module in pipelined manner, calibration efficiency is improved, data collection is accurate, data collection error caused by using different image acquisition apparatuses to calibrate different LED display modules is avoided and calibration manpower is reduced.
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