Image processing apparatus and method of strain correction in such an image processing apparatus

摘要

A checkered characteristic pattern is picked up by an image input device to form pick-up data. Characterizing points (intersecting points) are detected from the pick-up data. From the arrangement of the characterizing points about the center of the pattern and the positions of the characterizing points on the picture plane, a mapping function obtained when a TV camera is assumed to be a pin-hole camera is prepared. Reference positions of the characterizing points through the entire picture plane are calculated from the mapping function. The reference positions are compared with the actual positions on the picture plane to calculate a correcting function which in turn is stored in a correcting function preparing device. Normally, the inputted image is corrected by the correcting function and then outputted to an image output device.