An image fusion algorithm based on multi-scale dictionary learning

作者：Wang Jun^*; Peng Jinye; He Guiqing; Feng Xiaoyi

来源：Journal of Northwestern Polytechnical University, 2013, 31(5): 793-797.

• Dictionary learning
• Image domain
• Muli-scale analysis
• Sparse representation
• Wavelet domain

We combine the multi-scale analysis in wavelet domain with the single-scale sparse representation in image domain and propose an image fusion algorithm based on multi-scale dictionary learning. We transform the trained images into wavelet domain and train the dictionary for each sub-band dictionary. We use the trained dictionary to solve and fuse the sparse representation coefficient of each sub-band of a source image. The fused image is reconstructed through the inverse wavelet domain. Our algorithm combines the sparse character of a learned dictionary with the multi-resolution character of wavelet analysis. The experimental results, given in Fig. 2 and Table 1, and their analysis show that our image fusion algorithm outperforms those based on the learned dictionary in image domain and multi-scale analysis in wavelet domain respectively.

• 出版日期2013
• 单位西北工业大学