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Proceedings Paper

Realizing digital filters with an incoherent correlator
Author(s): Gang Cheng; Guofan Jin; Minxian Wu; Haisong Liu; Qingsheng He; ShiFu Yuan
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Paper Abstract

In this paper a novel method of realizing digital filters in an incoherent correlator is proposed. A gray-scale complementary encoding method is used to express the positive and negative numbers simultaneously so that the digital filtering will be simplified into a convolution of the encoding images and corresponding filter mask followed by a subtraction operation, which is easily done by optical method or computer. Based on the new method a compact incoherent optical digital filtering unit (IODFU) is built up. In the IODFU a SHARP QA-1200 8.4 inch active matrix TFT liquid crystal display panel is used for displaying the gray-scale images to be analyzed and the filter masks at the same time. The images and filters can be changed by computer-controlling for different destinations. The IODFU is very compact and the processing speed can get to 12 frames per second. At the end of this paper the experimental results are given.

Paper Details

Date Published: 25 August 1998
PDF: 7 pages
Proc. SPIE 3388, Advances in Optical Information Processing VIII, (25 August 1998); doi: 10.1117/12.319426
Show Author Affiliations
Gang Cheng, Tsinghua Univ. (United States)
Guofan Jin, Tsinghua Univ. (China)
Minxian Wu, Tsinghua Univ. (China)
Haisong Liu, Tsinghua Univ. (United States)
Qingsheng He, Tsinghua Univ. (China)
ShiFu Yuan, CREOL/Univ. of Central Florida (United States)


Published in SPIE Proceedings Vol. 3388:
Advances in Optical Information Processing VIII
Dennis R. Pape, Editor(s)

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