Abstract:

The fusion strategy of multi-scale image decomposition is the key point to improve the image fusion. To make full use of the information in the progress of multi-scale image decomposition, an image fusion strategy combined with image quality evaluation is proposed. This strategy includes two parts: first, the salient feature in the last level instead of current level is used to construct the weight which is necessary for the fusion of current level’s approximation images; second, the parameters of the image quality measurement such as spatial frequency and contrast are introduced for the fusion of detail images. The experiment demonstrates that, compared with current common fusion rules, the proposed fusion strategy has improved the quality of the fused image in subjective aspect as well in objective aspect.

Key words: image fusion, multi-scale decomposition, fusion strategy, approximation image, detail image