1992
DOI: 10.1117/12.130303
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<title>CCD photoresponse calibration and contrast adjustment for reliable material discrimination in the inspection of electronic packages</title>

Abstract: Inspection of complex electronic packages requires discrimination between the various materials used in such packages. Variations in the appearance of these materials and in the equipment's illumination complicates the segmentation process. In addition, some materials have similar reflectance and absorption characteristics. As a result, the segmentation process is. sensitive to small variations in the illumination settings, photoresponse nonuniformity, and contrast fluctuations. In this paper, we present two t… Show more

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