Method of adjusting the brightness of a digital camera image
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United States of America Patent
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Sep 16, 2014
Grant Date -
Nov 22, 2012
app pub date -
May 9, 2012
filing date -
May 19, 2011
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Abstract
A method for adjusting the brightness of a captured image from a digital camera includes calculating a reference exposure value using the capture parameters and calculating an actual exposure value as a function of ambient illumination parameters. The reference exposure and actual exposure values are compared to determine an actual image saturation value. The actual image saturation value is compared with the saturation value of the image sensor to determine a brightness adjustment factor, and the captured image is adjusted to compensate for overexposure or underexposure in response to the brightness adjustment factor. The image is scaled up or down using the brightness adjustment factor if the actual image saturation value is less than or more than the saturation value of the image sensor used to capture the image.
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