PCB defect positioning method based on multi-template matching

• Main Authors: ZHANG MEIJIE, WEI DENGMING, ZHANG LU, WANG HUALONG, ZHANG PENGZHONG
• Format: Patent
• Language: Chinese; English
• Published: 07.05.2019
• 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 PCB defect positioning method based on multi-template matching. By dividing a template image and according to the characteristics of divided small template images, relative matching templates are arranged, the error in traditional template matching can be greatly reduced through the PCB defect positioning method, the accumulative error caused by actual image deformation can be further reduced through multi-template matching, border-crossing judgment and automatic pixel filling processing are conducted on a matched area after template matching, and the problem that after border-crossing, the defect detection deviation occurs is also effectively solved through the PCB defect positioning method; and through the PCB defect positioning method, the positioning precisionin the PCB detection early stage can be improved, the accumulative deviation between an actual image and a template image is reduced, the detection efficiency and the detection precision are also effectively improved, and a s