Multifocus image fusion scheme based on the multiscale curvature in nonsubsampled contourlet transform domain

Xiaosong Li; Huafeng Li; Zhengtao Yu; Yingchun Kong

doi:10.1117/1.OE.54.7.073115

30 July 2015 Multifocus image fusion scheme based on the multiscale curvature in nonsubsampled contourlet transform domain

Xiaosong Li, Huafeng Li, Zhengtao Yu, Yingchun Kong

Author Affiliations +

Optical Engineering, Vol. 54, Issue 7, 073115 (July 2015). https://doi.org/10.1117/1.OE.54.7.073115

Abstract

An efficient multifocus image fusion scheme in nonsubsampled contourlet transform (NSCT) domain is proposed. Based on the property of optical imaging and the theory of defocused image, we present a selection principle for lowpass frequency coefficients and also investigate the connection between a low-frequency image and the defocused image. Generally, the NSCT algorithm decomposes detail image information indwells in different scales and different directions in the bandpass subband coefficient. In order to correctly pick out the prefused bandpass directional coefficients, we introduce multiscale curvature, which not only inherits the advantages of windows with different sizes, but also correctly recognizes the focused pixels from source images, and then develop a new fusion scheme of the bandpass subband coefficients. The fused image can be obtained by inverse NSCT with the different fused coefficients. Several multifocus image fusion methods are compared with the proposed scheme. The experimental results clearly indicate the validity and superiority of the proposed scheme in terms of both the visual qualities and the quantitative evaluation.

Citation Download Citation

Xiaosong Li, Huafeng Li, Zhengtao Yu, and Yingchun Kong "Multifocus image fusion scheme based on the multiscale curvature in nonsubsampled contourlet transform domain," Optical Engineering 54(7), 073115 (30 July 2015). https://doi.org/10.1117/1.OE.54.7.073115

Published: 30 July 2015

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