8 July 1998 Hybrid image processing instantiation: I. Optical subsystem
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We describe the optical correlator subsystem of a hybrid vision system. The optical correlator has a Kopin SLM at the input plane and a fast analog nematic Boulder Nonlinear Systems SLM at the filter plane. Filters are computed to provide identification and pose estimation for various objects. Spatial non-uniformities in the filter SLM are particularly bothersome from an operational standpoint. Methods of measuring and accommodating for the non- uniformities are described. Correlation filters produce an initially coarse identification, and later filters are intended to refine the coarse estimate of the pose of the observed object. Certain image preprocessing operations and their results are discussed; these include the cross- correlation that result when a Laplacian of Gaussian image is used as input to the system whose filter has been computed for a Sobel edge-extracted version of the reference image.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael V. Morelli, Michael V. Morelli, Richard D. Juday, Richard D. Juday, Stanley E. Monroe, Stanley E. Monroe, Chiun-Hong Chien, Chiun-Hong Chien, Wann-Quang Li, Wann-Quang Li, } "Hybrid image processing instantiation: I. Optical subsystem", Proc. SPIE 3389, Hybrid Image and Signal Processing VI, (8 July 1998); doi: 10.1117/12.316537; https://doi.org/10.1117/12.316537

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