Qing-jiang CHEN, Bing-zhe WEI, Yu-zhou CHAI, et al. Image fusion based on block principal pivoting nonnegative matrix in undecimated dual-tree complex wavelet domain[J]. Chinese journal of liquid crystals and displays, 2016, 31(8): 784-792.
DOI:
Qing-jiang CHEN, Bing-zhe WEI, Yu-zhou CHAI, et al. Image fusion based on block principal pivoting nonnegative matrix in undecimated dual-tree complex wavelet domain[J]. Chinese journal of liquid crystals and displays, 2016, 31(8): 784-792. DOI: 10.3788/YJYXS20163108.0784.
Image fusion based on block principal pivoting nonnegative matrix in undecimated dual-tree complex wavelet domain
A multi-focus image fusion algorithm based on undecimated dual-tree complex wavelet transform(UDT-CWT) domain and block principal pivoting method for nonnegative matrix factorization(BPP-NMF) is proposed. Firstly
combined with its shift invariance and good directional selectivity
the source images are decomposed to sub-band images with multi-scales and multi-directions by UDT-CWT
thus the low frequency sub-band coefficients and high frequency sub-band coefficients are obtained. The fusion strategy of low frequency sub-band coefficients was based on the method of nonnegative matrix factorization which adopted the block principal pivoting method; while for high frequency sub-band
a fusion rule adopting the consistency selection of Gaussian-weighted regional energy and area standard deviation is presented. Finally
the fused low and high frequency coefficients are reconstructed to image by undecimated dual-tree complex wavelet inverse transform. Fusion result is done with several sets of different multi-focus images
both subjective visual evaluation and objective performance assessments of these results are implemented. Results indicate that the fusion algorithm not only has good subjective visual effects
but also better than other general fusion strategies in the objective evaluation; hence the algorithm is effective.
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