VIDEO SIGNAL PROCESSOR

摘要

PROBLEM TO BE SOLVED: To improve the influence of flaws in an image pickup element and to obtain satisfactory video signals over a wide dynamic range. SOLUTION: An image pickup element 1010 of this video signal processor compares the level of a nonstandard exposure video signal 1070 that is photographed in an exposure time shorter than the standard one with the level of a flaw threshold signal 1083 via a signal level flaw detection means 1080. If the signal 1070 exceeds the flaw threshold signal level, the pixel of interest is decided as a flaw. A flaw correction means 1090 corrects the pixel decided as a flaw by means of the mean value of peripheral pixels. Then a standard exposure video signal 1091 and a nonstandard exposure video signal 1092 which undergone the correction of flaws are composited together by a video signal compositing means 1100. Thus, the flaw of the element 1010 is improved for every pixel and the satisfactory video signals are obtained over a wide dynamic range.