Patent ID: 9615032
Date: 2017-04-04
CPC Classifications: G06T,H04N

Claim:
1. A method for adjusting an auto exposure target in an auto-exposure operation on a sequence of images, comprising: identifying pixels in an image that have repeatedly exceeded a saturation threshold; obtaining a histogram of the image in which the identified pixels are excluded; applying a weighted histogram table to the histogram to obtain weighted tonal value bins wherein at least some bins in the histogram containing oversaturated pixels are assigned a higher weighting value and at least some bins in the histogram containing non-saturated pixels are assigned a lower weighting value; and summing the weighted histogram bins to obtain a saturation score and decreasing an auto exposure target for an auto exposure operation when the saturation score indicates that the image is oversaturated, and increasing the auto exposure target when the saturation score indicates that the image is non-saturated and when the image is underexposed.