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8 July 1998 Hybrid image processing instantiation: II. Digital subsystem
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We describe the digital subsystem of a hybrid vision system. The digital processing includes feature extraction, projection of an object's model through a camera model, space-domain correlation of the model feature with the observed feature map, and a constrained solution that minimizes errors in the fit between modeled and observed features by using a gradient search routine. The digital processing refines the coarse information from the optical processor. Examples will be shown of the degree to which the digital system can refine the precision of the optical estimate and how the optical pre-processing can provide a starting pose for the gradient search, thus minimizing the likelihood of the process's catching on a local minimum in the cost function.
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Chun-Shin Lin, Chiun-Hong Chien, and Richard D. Juday "Hybrid image processing instantiation: II. Digital subsystem", Proc. SPIE 3389, Hybrid Image and Signal Processing VI, (8 July 1998);

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