PCB Quality Check: Optical Inspection Using Color Mask and Thresholding

The paper proposes an automated optical inspection system for detection of PCB mounting defects. The reference image was processed using HSV color space and image thresholding. The color mask was created for the colors of the mounted components - black, gray and brown. The system can identify multiple faults on the test PCB in a single cycle, thus increasing the efficiency of the process. The optical inspection system is suitable for both bare and populated PCBs.