high-precision PCB defect intelligent detection method

• Main Authors: ZHANG MEIJIE, LI XIANWEI, ZHANG LU, WANG HUALONG, ZHANG PENGZHONG
• Format: Patent
• Language: Chinese; English
• Published: 17.05.2019
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention provides a high-precision PCB defect intelligent detection method. The method comprises the following steps of performing Template matching operation on a template image and a test image; obtaining an optimal matching point of the template image on the test image, intercepting an area with the same width and height as the template image, carrying out rotary alignment, enabling the intercepted test image to be highly overlapped with the template image, then carrying out differential processing, cutting processing and edge processing, and carrying out defect detection by using a contour out-of-tolerance algorithm; According to the invention, the detection speed and precision of the PCB surface quality are improved, the detection efficiency is effectively improved, the occurrence of defect false detection or missing detection is reduced, the automatic detection of the surface defects of the printed circuit board is realized, the manpower, financial resources and materials are saved, and the product