A method of judging whether an image is false or not at the time of image comparison inspection and a method of detecting a defective position

摘要

FIELD OF THE INVENTION The present invention relates to a positive / negative determination method and a method for detecting a defective position in an image comparative inspection which can check the state irrespective of the defect size and can easily detect the defective position. The reference model image and the inspection object image are subjected to correlation calculation for each horizontal and vertical line and compared with each other. When the line start point and the end point of the inspection object image having a lower calculation value than the reference model image are stored, If there is a redundant area, it is judged as defective and the overlapping area is judged as the defective position, so that it is possible to detect the position of defective judgment and defective accurately even in case of defective or small defect existing between small areas .