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1 April 1991 Coherent digital/optical system for automatic target recognition (Abstract Only)
John I. Derr, Tammy G. Ghaffari
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Proceedings Volume 1406, Image Understanding in the '90s: Building Systems that Work; (1991) https://doi.org/10.1117/12.47974
Event: Applied Imaging Pattern Recognition, 1990, McLean, VA, United States
Abstract
Litton Data Systems has developed a hybrid ATR system using DataCube signal processing and imaging boards controlled by a host Sun workstation. The input image preprocessor includes detection algorithms that locate candidate targets in a simulated or real JR scene and segmentation algorithms that generate target outlines which are normalized for recognition processing by Litton's LIGHTMOD optical correlator. Target detection performs a raster scan over the image using nested boxes to find detection pixels based on intesity/variance contrasts. Segmentation operates on windows centered at the centroids of connected components of detection pixels. Optimal thresholds are determined from gray scale histograms. Multimodal optimization seeks to maximize edge/boundary proximities for candidate target and island components obtained by thresholding with respect to the optimal thresholds. Relaxation smooths the boundaries of optimal target components or merged target/island components. Normalization algorithms scale and center the component boundaries in a 128x128 LIGHT-MOD window. The LIGHT_MOD correlates the FT of the normalized outline with the FTs of a reference library of target outlines. Template matching is the basic technique used for recognition.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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John I. Derr and Tammy G. Ghaffari "Coherent digital/optical system for automatic target recognition (Abstract Only)", Proc. SPIE 1406, Image Understanding in the '90s: Building Systems that Work, (1 April 1991); https://doi.org/10.1117/12.47974
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KEYWORDS
Automatic target recognition
Detection and tracking algorithms
Image segmentation
Imaging systems
Target detection
Fourier transforms
Image processing
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