Image signal correction apparatus, imaging apparatus, endoscopic apparatus
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United States of America Patent
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Mar 17, 2015
Grant Date -
Apr 25, 2013
app pub date -
May 16, 2012
filing date -
Oct 21, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An image signal correction apparatus includes: a frame memory configured to hold input image signals corresponding to a predetermined number of frames; a difference calculation unit configured to calculate a difference signal between an input image signal and each of the image signals held in the frame memory; a filter unit configured to pass a difference signal having a value equal to or smaller than a threshold value; and a control unit configured to change the threshold value of the filter unit in accordance with the value of the difference signal calculated in the difference calculation unit.
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