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中文摘要：
基于QFP芯片的管脚外观检测的需要，开发了基于机器视觉的QFP芯片外观检测系统，并简要介绍了该系统的硬件系统和软件系统。为实现管脚外观检测要求，采用Canny算子边缘检测算法针对QFP管脚的图像进行处理，着重论述了管脚栈高的检测方法及基于三点法的管脚共面度的检测方法。测试结果表明，该外观检测系统能达到在线生产的工艺要求。
英文摘要：
In order to inspect the appearance of QFP ,：hip lead, an automatic inspection system based on machine vision was designed. Hardware structure and software system were introduced here- in. In the software system, Canny algorithm was successfully applied to detect the edge of the QFP chip lead. After that, the inspection method of standoff and the detecting method based on three-- point seating plane of co--planarity were discussed. Finally, the testing experiments with respect to the QFP chip visual inspection system were carried out.which achieves satisfactory results.
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