A Novel Image Fusion Method Based on FRFT-NSCT

Nonsubsampled Contourlet transform (NSCT) has properties such as multiscale, localization,multidirection, and shift invariance, but only limits the signal analysis to the time frequency domain. Fractional Fourier transform (FRFT) develops the signal analysis to fractional domain, has many superperfo...

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Bibliographic Details
Published in:Mathematical problems in engineering 2013-01, Vol.2013 (2013), p.1-9
Main Authors: Wang, Peiguang, Zheng, Wei, Tian, Hua
Format: Article
Language:English
Subjects:
Algorithms
Bandpass
Coefficients
Computer simulation
Computer vision
Decomposition
Defense industry
Fourier transforms
Image acquisition
Image processing
Information science
Inverse
Localization
Market shares
Mathematical analysis
Methods
Remote sensing
Science
Shape
Signal analysis
Signal processing
Wavelet transforms
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Summary:Nonsubsampled Contourlet transform (NSCT) has properties such as multiscale, localization,multidirection, and shift invariance, but only limits the signal analysis to the time frequency domain. Fractional Fourier transform (FRFT) develops the signal analysis to fractional domain, has many superperformances, but is unable to attribute the signal partial characteristic. A novel image fusion algorithmbased on FRFT and NSCT is proposed and demonstrated in this paper. Firstly, take FRFT on the two sourceimages to obtain fractional domain matrices. Secondly, the NSCT is performed on the aforementionedmatrices to acquire multiscale and multidirection images. Thirdly, take fusion rule for low-frequencysubband coefficients and directional bandpass subband coefficients to get the fused coefficients. Finally, thefused image is obtained by performing the inverse NSCT and inverse FRFT on the combined coefficients. Three modes images and three fusion rules are demonstrated in the proposed algorithm test. The simulationresults show that the proposed fusion approach is better than the methods based on NSCT at the sameparameters.
ISSN:1024-123X
1563-5147
DOI:10.1155/2013/408232