Video camera with improved shading correction using clipped parabolic wave signal
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United States of America Patent
Stats
-
Aug 30, 1994
Grant Date -
N/A
app pub date -
Nov 9, 1992
filing date -
Nov 15, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A video camera includes a shading correction circuit in which a parabolic wave signal is generated and the level thereof is adjusted in accordance with zoom and iris settings of the camera's optical system. After adjustment, the parabolic wave signal is clipped in accordance with a reference level and the clipped parabolic wave signal is used for correcting the shading of the camera's image signal. The clipping of the parabolic correction signal allows for more accurate shading correction.
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Cited Art Landscape
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