Light source estimating apparatus and image pickup apparatus
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United States of America Patent
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Jun 11, 2019
Grant Date -
Mar 9, 2017
app pub date -
Nov 17, 2015
filing date -
Sep 3, 2015
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Abstract
A light source estimating apparatus of embodiments has a sensitivity ratio spatial distribution calculating unit configured to extract a first color pixel and a second color pixel which have close spectral sensitivity and which have different sensor responses from a first picked up image picked up with an image sensor under an arbitrary light source, and calculate a ratio between a signal value of the first color pixel and a signal value of the second color pixel to acquire a first sensitivity ratio spatial distribution, and a similarity determining unit configured to estimate a type of the arbitrary light source based on similarity between a second sensitivity ratio spatial distribution group calculated using a second picked up image picked up with the image sensor under a known light source and the first sensitivity ratio spatial distribution.
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