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Appearance inspection method of an electronic component, a recording medium recording a program for realizing the appearance inspection apparatus and appearance inspection process in the computer
Appearance inspection method of an electronic component, a recording medium recording a program for realizing the appearance inspection apparatus and appearance inspection process in the computer
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机译:电子部件的外观检查方法,记录有用于在计算机中实现外观检查装置和外观检查处理的程序的记录介质
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摘要
A visual inspecting method for an electronic device, comprising steps of: photographing an image of a surface of the electronic device; dividing the photographed image into a plurality of unit regions and obtaining a distribution of gradation levels for each unit region; subtracting a predetermined offset value from the gradation level of the highest frequency selected from the gradation levels for each unit region so as to obtain a binarization level for each unit region; interpolating the binarization levels for unit regions so as to obtain a binarization level at each coordination position of the photographed image; and comparing the gradation level at each coordination position of the photographed image with the binarization level at each coordination position and determining that a defect is present at a coordination position where the gradation level thereat is lower than the binarization level thereat.
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