Video camera and its control method

摘要

A video camera comprises an image pickup device, an extracting circuit to extract a partial image signal corresponding to a picture plane range of a predetermined portion from a whole image signal which is generated from the image pickup device, and a microcomputer to determine a correction value of the whole image signal on the basis of an output signal of the extracting circuit. The extracting circuit has a function to generate an interruption signal to the microcomputer at a time point when the extracting operation of the partial image signal by the extracting circuit ends. The video camera further has a correcting circuit to correct the whole image signal on the basis of the correction value decided by the microcomputer.