Patent ID: 6734904
Filing Date: 2004-05-11
Classification: H04N

Abstract:
A method of brightness control for an image sensor, said method comprising:receiving image data of an image from said image sensor; determining pixel intensities in a region of interest comprising a portion of the image including roadway lane marker(s); estimating the number and intensity of pixels corresponding to the lane marker(s) in said region of interest based on prior knowledge of the lane marker(s); discarding the pixels corresponding to the lane marker(s) to derive pixels comprising the background portion of the region of interest surrounding the lane marker(s); detecting the brightness level of said pixels comprising the background portion of the region of interest; determining an adjusted brightness level of said background portion of the region of interest, wherein the brightness of said lane marker(s) is optimized in relation to said background portion of the region of interest; and controlling said image sensor to alter said brightness level of said background portion of the region of interest to said adjusted brightness level.