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2 February 2009High-resolution inline video-AOI for printed circuit assemblies
We enhance an existing in-circuit, inline tester for printed circuit assemblies (PCA) by video-based automatic optical
inspection (Video-AOI). Our definition of video is that we continuously capture images of a moving PCA, such that each
PCA component is contained in multiple images, taken under varying viewing conditions like angle, time, camera settings
or lighting. This can then be exploited for an efficient detection of faults. The first part of our paper focuses on the
parameters of such a Video-AOI system and shows how they can be determined. In the second part, we introduce techniques
to capture and preprocess a video of a PCA, so that it can be used for inspection.
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Benjamin Guthier, Stephan Kopf, Wolfgang Effelsberg, "High-resolution inline video-AOI for printed circuit assemblies," Proc. SPIE 7251, Image Processing: Machine Vision Applications II, 725104 (2 February 2009);