Patent ID: 6674475
Filing Date: 2004-01-06
Classification: H04N

Abstract:
A method for controlling a shutter open time in an opto-electronic device, comprising:collecting a frame of pixel intensity data; calculating an average pixel intensity across said frame; comparing said average pixel intensity to a first threshold; adjusting said shutter open time in a first direction if said average pixel intensity is outside a first intensity range defined by said first threshold; and if said average pixel intensity is not outside a first intensity range: detecting a peak pixel intensity; comparing said peak pixel intensity to a second threshold; adjusting said shutter open time in said first direction if said peak pixel intensity is outside a second intensity range defined by said second threshold; and if said peak pixel intensity is not outside a second intensity range: comparing said peak pixel intensity to a third threshold; and adjusting said shutter open time in a second direction if said peak pixel intensity is outside a third range defined by said third threshold.