BLACK LEVEL CALIBRATION METHODS FOR IMAGE SENSORS
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United States of America Patent
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app pub date -
Jun 28, 2013
filing date -
Sep 21, 2012
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Abandoned
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Abstract
A technology is described for calibrating a black level in an image sensor. The technology provides devices, systems and methods for calculating a black level value, where in one aspect, an image data set can be received from an optical black pixel region of an image sensor. A minimum and a mean value can be calculated for the image data set. Thereupon, image thresholding of the image data set can be performed that produces a binary image segmentation of the image data set and a global threshold value can be set to the binary image segmentation that is black. A function can then be performed that determines light corruption in the image data set, and if light corruption is detected, then the image data set can be sorted and a median value can be calculated for a bottom percentage of the sorted image data set and provided as a black level baseline value.
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