8 July 1998 Compact hybrid optoelectrical unit for image processing and recognition
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Abstract
In this paper a compact opto-electric unit (CHOEU) for digital image processing and recognition is proposed. The central part of CHOEU is an incoherent optical correlator, which is realized with a SHARP QA-1200 8.4 inch active matrix TFT liquid crystal display panel which is used as two real-time spatial light modulators for both the input image and reference template. CHOEU can do two main processing works. One is digital filtering; the other is object matching. Using CHOEU an edge-detection operator is realized to extract the edges from the input images. Then the reprocessed images are sent into the object recognition unit for identifying the important targets. A novel template- matching method is proposed for gray-tome image recognition. A positive and negative cycle-encoding method is introduced to realize the absolute difference measurement pixel- matching on a correlator structure simply. The system has god fault-tolerance ability for rotation distortion, Gaussian noise disturbance or information losing. The experiments are given at the end of this paper.
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Gang Cheng, Gang Cheng, Guofan Jin, Guofan Jin, Minxian Wu, Minxian Wu, Haisong Liu, Haisong Liu, Qingsheng He, Qingsheng He, ShiFu Yuan, ShiFu Yuan, } "Compact hybrid optoelectrical unit for image processing and recognition", Proc. SPIE 3389, Hybrid Image and Signal Processing VI, (8 July 1998); doi: 10.1117/12.316532; https://doi.org/10.1117/12.316532
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