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Proceedings Paper

Reconstruction of uncompleted frequency spectrum images based on Fourier telescopy
Author(s): Meiling Kang; Chunping Yang; Jian Wu
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Paper Abstract

Fourier Telescopy (FT), an active laser imaging technique, is a good choice for high resolution imaging systems, which can be used to obtain satellite images from geosynchronous orbit targets. These images maybe lose part of frequency spectrum due to the limitation of the separation of the transmitter apertures (STA) and antenna array arrangements, etc. In this paper, the impact on image reconstruction of active laser imaging technique owing to the uncompleted degree of spectrum is mainly discussed. First, the FT imaging theory and frequency sampling technology are introduced. Then, the basic principle of image reconstruction is analyzed. The defective high frequency spectrum which is caused by the limitation of STA is replaced by zero (zero padding method for short). And the spectrum defective degree is approximately treated as the results of original target images passing through an ideal low-pass filter. Finally, the image reconstruction program is designed and the uncompleted frequency spectrum images are simulated with the method of zero padding. Simulation results show that images begin to become blurring when the cutoff frequency of the ideal low-pass filter is 10% lower than the width of the after padding original images.

Paper Details

Date Published: 30 October 2009
PDF: 7 pages
Proc. SPIE 7495, MIPPR 2009: Automatic Target Recognition and Image Analysis, 74954G (30 October 2009); doi: 10.1117/12.832585
Show Author Affiliations
Meiling Kang, Univ. of Electronic Science and Technology of China (China)
Chunping Yang, Univ. of Electronic Science and Technology of China (China)
Jian Wu, Univ. of Electronic Science and Technology of China (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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