Reconstruction of uncompleted frequency spectrum images based on Fourier telescopy

Meiling Kang; Chunping Yang; Jian Wu

doi:10.1117/12.832585

30 October 2009 Reconstruction of uncompleted frequency spectrum images based on Fourier telescopy

Meiling Kang, Chunping Yang, Jian Wu

Proceedings Volume 7495, MIPPR 2009: Automatic Target Recognition and Image Analysis; 74954G (2009) https://doi.org/10.1117/12.832585
Event: Sixth International Symposium on Multispectral Image Processing and Pattern Recognition, 2009, Yichang, China

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.

Citation Download Citation

Meiling Kang, Chunping Yang, and Jian Wu "Reconstruction of uncompleted frequency spectrum images based on Fourier telescopy", Proc. SPIE 7495, MIPPR 2009: Automatic Target Recognition and Image Analysis, 74954G (30 October 2009); https://doi.org/10.1117/12.832585

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available