Automatic channel gain and offset balance for video cameras employing multichannel sensors.

摘要

A video camera (10) includes; a multi-channel sensor (12) for producing a plurality of parallel analog image signals representative of a sensed image; a plurality of analog-to-digital converters (ADC) (18/1)-(18/64) for converting each of the parallel analog image signals to parallel digital image signals, wherein each of the ADCs (18/1)-(18/64) has a fine gain parameter which is a function of a top ladder potential (AREFTF) and also has a fine offset parameter which is a function of a bottom ladder potential (AREFBF); and a control (24) for controlling the fine gain and offset parameters of each of the ADCs (18/1)-(18/64) by means of fine gain and offset control signals which are a function of desired average output black and gray levels of the image signal.