A fast and accurate positioning algorithm of PCB location hole coordinate base on the potential function

Because there are some defects with the detection of PCB (Printed Circuit Board) location hole with traditional methods, the paper presents a fast and accurate positioning algorithm of location hole based on potential function, which is not interfered by the bright spots within the pad image and also be adaptable to the fuzzy pad image and the deformed pad due to poor quality of circuit board corrosion. The algorithm was implemented and experiments show that the new method provides with stable performance, high positioning accuracy and good efficiency, which can be better meet the engineering real-time requirements.