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Proceedings Paper

A preprocessing method based on non-subsampled contourlet transform
Author(s): Bo Wu; Zhiguo Cao; Yi Zheng; Wen Zhuo
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Paper Abstract

This paper focuses on preprocessing methods for the infrared images. Due to noises, low contrast and local difference of materials, Forward-looking Infrared targets have a great difference of local gray levels. Such different gray levels add the difficulty of targets detection and may lead a decrease in accuracy and rate of detection in Gray-based template matching. To overcome the difficulty, we present a novel preprocessing method based on non-subsampled contourlet transform (NSCT) which is good at multi-direction and multi-scale. This method firstly do Non-subsampled contourlet transform to infrared images. The level of decomposition is decided by the size of the template which is considered as the basic structure and the directions of decomposition are chosen by the imaging angles. Then we reconstruct the image according to the coefficients of the decomposition. Experiments based on template matching in forward-looking infrared images show that the proposed preprocessing method based on NSCT can significantly improve the detection rate (DR) and the stability. Experimental results also show that our proposed method has better performance than some other preprocessing methods.

Paper Details

Date Published: 30 October 2009
PDF: 5 pages
Proc. SPIE 7495, MIPPR 2009: Automatic Target Recognition and Image Analysis, 74950Y (30 October 2009); doi: 10.1117/12.832364
Show Author Affiliations
Bo Wu, Huazhong Univ. of Science and Technology (China)
Zhiguo Cao, Huazhong Univ. of Science and Technology (China)
Yi Zheng, Huazhong Univ. of Science and Technology (China)
Wen Zhuo, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 7495:
MIPPR 2009: Automatic Target Recognition and Image Analysis
Tianxu Zhang; Bruce Hirsch; Zhiguo Cao; Hanqing Lu, Editor(s)

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