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Forward-looking sonar image fusion based on non-subsampled contourlet transform. (Chinese. English summary) Zbl 1399.94023

Summary: According to the inherent properties of forward-looking sonar (FLS) images, such as non-uniform clarity and local blurred regions, a novel fusion method based on non-subsampled contourlet transform is proposed for FLS image fusion. Based on the theory of multi-scale analysis, the source images are decomposed into multi-scale coefficients by non-subsampled contourlet transform; the fusion rules are constructed on the fact that the clear objects have high reflection energy and contrast in FLS images, therefore the low-frequency sub-band is fused by the Gabor energy and the high-frequency sub-bands are fused by the local contrast, respectively; the region consistency check is then implemented to suppress the influence of noise; the fusion image is obtained by inverse non-subsampled contourlet transform on the generated fused coefficients. Experiments on FLS image fusion have been conducted to demonstrate the effectiveness and the superiority of the proposed technique using both a subjective evaluation and objective metrics.

MSC:

94A08 Image processing (compression, reconstruction, etc.) in information and communication theory
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