Target follow-up device and camera comprising the same

Abstract

The target follow-up device of the present invention is adapted quickly and reliably to follow up the position of a target which is moving at high speed. It incorporates an imaging sensor having a number of imaging elements, which performs photometry over the photographic field and which outputs input image data. Based upon this imaging sensor output, input image data for the target to be followed up are stored as reference image data by a memory device. Based upon minimum residue calculation between the input image data and the reference image data, the target follow-up device of the present invention determines the position of the target. In this determination operation, the target follow-up device selects at least one color from a plurality of colors contained in common by the input image data and the reference image data, and calculates the minimum residue for the selected color component.

Dependencies are inferred from the claim text.