Abstract
Image fusion is a process to combine or fuse various images captured from different sensors, different viewpoints, multi-focused, multi-exposure, etc. The fused image is capable of providing the complementary information captured from different images. Infrared and visible image fusion has become extensively employed in both military and civilian applications because to incredible breakthroughs in sensor technology. In this paper, a novel approach (DWTBF) of an infrared (IR) and visible (VI) image fusion based on Discrete Wavelet Transform (DWT), and a bilateral filter is proposed. DWT produces higher quality fusion image than the spatial domain, and it is used to decompose the image into a series of coefficients, falling in different frequency bands. A bilateral filter (BF), which is an edge-preserving and smoothing filter is used to obtain fusion weights. The “low-frequency” and “high-frequency” sub-bands generated using DWT are treated in a dissimilar manner and an averaging and weighted averaging based fusion strategy is proposed respectively. The final image is reproduced using inverse discrete wavelength transform (IDWT). The typical Discrete Wavelet Transform- bilateral filter (DWTBF) based fusion delivers better results and preserves more details of visible image and clearer infrared objects at the same time. The final fused image shows prominent results in terms of \(N^{{{\raise0.7ex\hbox{${AB}$} \!\mathord{\left/ {\vphantom {{AB} F}}\right.\kern-\nulldelimiterspace} \!\lower0.7ex\hbox{$F$}}}}\), \(SSIM\), \(SCD\), and \(Q^{{{\raise0.7ex\hbox{${AB}$} \!\mathord{\left/ {\vphantom {{AB} F}}\right.\kern-\nulldelimiterspace} \!\lower0.7ex\hbox{$F$}}}}\) and it outperforms as compared to similar available existing techniques.
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Singh, S., Singh, H., Gehlot, A. et al. IR and visible image fusion using DWT and bilateral filter. Microsyst Technol 29, 457–467 (2023). https://doi.org/10.1007/s00542-022-05315-7
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DOI: https://doi.org/10.1007/s00542-022-05315-7