Abstract: The video camera is widely applied to embedded systems. Before further processed by the embedded systems, the analog video signal is usually digitized first. The large amount of data has made the difference of the processing capability much significant, and that limits the widespread use of vision sensor. An analog video signal processing system with differential and image rectification is proposed, in which the differential between pixel in analog signal is used to detect the edge. Meanwhile, the projective distortion is corrected according to lookup table. It is easier for further processing after the rectification of projective distortion. The solution improves the real time of signal processing and reduces the dependence on processing capability.
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Key words: difference processing, non-uniform sampling, projective distortion, image rectification