Scientific Online Publishing (SOP)
In this paper, the authors present inspection of Printed Circuit Boards (PCBs) based on normalized cross-correlation. Correlation gives the similarity measure of images. In this paper, normalized cross-correlation has been used to differentiate between a defective and defect free printed circuit board. Different PCBs have been inspected using normalized cross-correlation in this paper and further defected PCBs have been used for detection of all possible defects. Image subtraction (one of referential methods) is used for detection of defects of PCBs.