Patent ID: 6737654
Filing Date: 2004-05-18
Classification: H04N

Abstract:
A method for temperature compensation of an image detector including photosensitive spots sensitive to ambient temperature, each connected to a row conductor and a column conductor, each of the photosensitive spots being connected by one conductor to a read circuit, wherein the photosensitive spots are divided into a) detecting photosensitive spots configured to be exposed to light information corresponding to the image to be detected, read circuits associated with the detecting photosensitive spots each delivering a measurement voltage representative of the image to be detected, and b) into blind photosensitive spots protected from the light information, read circuits associated with the blind photosensitive spots each delivering a dark voltage serving for temperature compensation, comprising:picking up, during detection of an image, the dark voltages; generating an average correction value from the dark voltages coming from one or more detected images; and using the average correction value to generate a correction voltage to be applied, during detection of a subsequent image, to the read circuits associated with the detecting photosensitive spots so that they deliver a measurement voltage made substantially independent of temperature.