Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-01-30
1991-05-28
Shepperd, John W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 32, H04N 5202, H04N 969
Patent
active
050199099
ABSTRACT:
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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Fuji Photo Film Co. , Ltd.
Parker Michael D.
Shepperd John W.
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