Television signal processor for generating video signal of wide dynamic range, television camera using the same, and method for television signal processing
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United States of America Patent
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Jun 8, 2004
Grant Date -
N/A
app pub date -
Jun 6, 2000
filing date -
Jun 7, 1999
priority date (Note) -
Expired
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Abstract
A television signal processor generates a wide dynamic range video signal on the basis of a first video signal matched to the brightness of a low-brightness region of an object image, and a second video signal matched to the brightness of a high-brightness region of the object image, and adjusting means for subjecting the first and second video signals individually to white balance process. The television signal processor further has means for detecting histogram values of particular signal level regions of the second video signal, means for detecting the peak value of the second video signal, means for determining a combining ratio of the first and second video signals according to the detected peak value and combining ratio, nonlinear processing means for nonlinear-processing the first video signal according to the detected histogram value, and combining means for combining the nonlinear-processed first and second video signals at a predetermined combining ratio.
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