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- W2062485004 abstract "Printed circuit board film is used for making PCB. Size and defects are important parameters in PCB films' qualityevaluation. An online measuring method based on linear CCD for 500mm width PCB film was proposed. The methodincluded (1) definition of parameters, (2) imaging range, which was wider than a PCB film unit to reduce the errorscoming from the assembling of CCD and (3) the 2D scanning of PCB film and CCD. Template matching was used forextracting the interested region. Region growing was used for pinhole detection. Image subtraction was used in breakagedetection. And region segmentation was used for size measurement. According to the design and analysis, the onlinemeasuring method can meet the demands. Experiments showed that (1) the method can detect and classify PCB films'defects efficiently, and (2) the size measuring accuracy can reach 0.1mm." @default.
- W2062485004 created "2016-06-24" @default.
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- W2062485004 date "2007-11-29" @default.
- W2062485004 modified "2023-09-24" @default.
- W2062485004 title "Online measuring method for PCB film using linear CCD" @default.
- W2062485004 doi "https://doi.org/10.1117/12.757097" @default.
- W2062485004 hasPublicationYear "2007" @default.
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