Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1990-08-03
1992-01-07
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358164, H04N 969, H04N 5202
Patent
active
050796224
ABSTRACT:
In an image sensing apparatus such as a video camera, an evaluating value for exposure control and determination of a gamma correction value is computed in response to a video signal obtained by an image sensing device for each of a plurality of sampling areas in a sensed image. When an evaluating value which exceeds an allowable range with respect to a predetermined reference value is included in the evaluating values, it is determined that an abnormal luminance portion exists in the corresponding sampling area, so that weighting of the evaluating value is decreased, whereby the effect of such an area on exposure adjustment is restrained. In addition, the picture contrast is computer from the ratio of the maximum value to the minimum value of the evaluating values, whereby the most suitable gamma correction value is determined based on this picture contrast.
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Greening Wendy R.
Groody James J.
Michaelson Peter L.
Sanyo Electric Co,. Ltd.
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