... with a maximum distance. Hough transform is used to reject the mismatches and the affine parameters are computed with a square‐least solution. Findings Results show that the method proposed in this paper can match the PCB images without using special fiducial marks effectively. The image matching algorithm...

...Jie‐xian Huang; Dong‐tao Yang; Cang‐lai Gong Purpose The purpose of this paper is to propose a new inspecting algorithm for defect detection on PCB circuits. Design/methodology/approach PCB circuit images were processed by a radon transformation. A Radon histogram was formed and utilized...