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The Automated optical inspection system AOI uses the acquired image that is processed and then compared to the knowledge of the machine on the proper operation of the circuit board. Using this comparison method, the AOI system can now detect and expose defects or suspicious areas. AOI makes use of a variety of techniques to provide satisfactory circuit board analysis or any defect: Template Matching: With this form of AOI process, the automated optical control system compares the resulting image to the image of a “golden board”. Pattern Matching: By using this technique, the AOI system stores information from good and bad printed circuit assemblies, while matching the resulting image with them.
Vision Inspection Machine