Patent ID: 7417675
Filing Date: 2008-08-26
Classification: H04N

Abstract:
1. An imaging system, comprising: an electromagnetic radiation detector configured to produce an analog image signal; a black clamp adjust circuit which maintains a black reference signal for said image signal; a differential amplifier connected to compare said analog image signal to said black reference signal and to produce a normalized image signal; an analog-to-digital converter connected to convert said normalized image signal to a digital format; and a controller connected to control the timing and operation of said imaging system; wherein said black clamp adjust circuit, together with said diff. amp. and said analog-to-digital converter, maintains a black reference signal for said imaging system, and wherein the radiation detector, black clamp adjust circuit, differential amplifier and analog-to-digital converter are all directly connected to the controller and directly managed by the controller to continuously stabilize and maintain the black reference signal for said imaging system using reference data supplied by the electromagnetic radiation detector.