Infrared and Visible Light Image Fusion Method Based on Non-Subsampled Contourlet Transform

This paper proposes an infrared and visible light image fusion method utilizing the Non-Subsampled Contourlet Transform (NSCT). The approach implements weighted fusion for high-frequency coefficients by combining activity measures and multi-resolution coefficient correlations, while low-frequency coefficients are processed through local gradient-based activity measurement with a hybrid weighted-selection fusion rule.