Patent ID: 7359564
Filing Date: 2008-04-15
Classification: G06F,G06K,H04N

Abstract:
1. A method for reducing effects of uncontrolled light in imaging data, comprising the steps of: (a) illuminating a region of interest with controlled light generated by a controlled light source emitting light having known intensities in a plurality of frequency ranges; (b) positioning an image sensing system to receive light from the region of interest, the image sensor system being configured to detect an intensity of light in each of the plurality of frequency ranges; (c) acknowledging different sensitivities of the image sensing system to light received in each of the plurality of frequency ranges; (d) detecting the intensity of received light from the region of interest in each of the plurality of frequency ranges, the received light including the uncontrolled light and a portion of the controlled light that has been reflected from the region of interest; and (e) computing an intensity of the uncontrolled light included in the received light based on the known intensities of the controlled light source and the intensity of light intensity detected in each of the plurality of frequency ranges; and (f) adjusting the imaging data as a function of the computed intensity of the uncontrolled light to compensate for a contribution of the uncontrolled light to the imaging data.