| 摘要 |
A video camera for photographing papers which is used in a video apparatus for office automation such as an electronic image input apparatus. The video camera includes an image pickup part for picking up the images of papers and a signal processing part for converting a video signal obtained from the image pickup part into a given format. The signal processing part includes a gamma correction circuit for correcting the gamma value of the video signal obtained from the image pickup part. The gamma correction circuit has at least two discrete gamma correction values so that a proper gamma correction value can be selected according to the objects to be photographted. For example, when the objects to be photographted are black and white papers, a value of 0.45 or greater is selected for the gamma correction value. By selecting the gamma correction value in this manner, even when the black and white papers are photographed, clear images thereof will result for display on the screen of a television monitor.
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