Patent ID: 6134339
Filing Date: 2000-10-17
Classification: G06K,G06T

Abstract:
A method for determining the position of eyes within a frame of captured image data comprising the steps of:capturing two color frames of an image scene wherein one frame is captured with an ambient illumination and the other frame is captured with an additional illumination;storing said frames of said image scene in a memory;compensating said frames for the overall illumination change between said two captured frames to obtain a compensated frame;determining the difference between said compensated frame and an uncompensated frame of said two captured frames to obtain a compensated color difference image;scanning said compensated color difference image and determining pairs of regions of high intensity pixel value in at least one color channel; andoutputting the data of pixel pair coordinates wherein each coordinate corresponds to a center of each region of high intensity pixel value in said color channel within said captured image scene.