Television – Camera – system and detail – Combined image signal generator and general image signal...
Reexamination Certificate
2011-08-09
2011-08-09
Tran, Sinh (Department: 2622)
Television
Camera, system and detail
Combined image signal generator and general image signal...
C250S208100, C250S208300
Reexamination Certificate
active
07995114
ABSTRACT:
A method for providing image illumination calibration includes: generating a plurality of images of a calibration target at a plurality of exposure levels, each image of the plurality of images being represented by a total pixel area; identifying a plurality of zones of the total pixel area, each zone of the plurality of zones corresponding to a particular image of the plurality of images at a particular exposure level of the plurality of exposure levels, with each zone representing a pixel sub-area that excludes saturated pixels; combining the plurality of zones for the plurality of images of the calibration target to generate a final calibration image; and generating a shading table to correct the final calibration image to obtain a uniform image of the calibration target over the total pixel area, the shading table including gain and offset values associated with each pixel of the total pixel area.
REFERENCES:
patent: 7259784 (2007-08-01), Cutler
patent: 2006/0256214 (2006-11-01), MacLean et al.
patent: 2007/0030537 (2007-02-01), Mai et al.
King Anthony Michael
Miller Mark Eric
Le Quang V
Lexmark International Inc.
Tran Sinh
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