Title

Compact hybrid opto-electrical unit for image processing and recognition

Keywords

Absolute difference measurement; Compact hybrid opto-electric unit; Digital filtering; Pattern recognition; Positive and negative cycle-encoding method

Abstract

In this paper a compact hybrid 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'' active matrix TFT liquid crystal display (LCD) panel which is used as two real-time spatial light modulators (SLMs) 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 a edge-detection operator is realized to extract the edges from the input images. Then the preprocessed images are sent into the object recognition unit for identifying the important targets. A novel template-matching method is proposed for gray-tone 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 good fault-tolerance ability for rotation distortion, Gaussian noise disturbance or information losing. The experiments are given at the end of this paper.

Publication Date

7-8-1998

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

3389

Number of Pages

113-121

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.316532

Socpus ID

85076818449 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85076818449

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