In the handheld optronic device Fusionsight, a smart digital fusion is employed. FusionSight is a night vision device that includes visible and thermal sensors. Our smart digital fusion proceeds in a frequency decomposition of both images coming from the visible and the infrared sensors, in order to obtain N frequency components for both images. The Ith frequency component of the visible image and the Ith frequency of the infrared image are then weighted with an Ith specific coefficient, and then recombined together in order to obtain a synthetic image with a I frequency component. All the synthetic images obtained likewise are then recombined together in order to obtain a fused image.
Emmanuel Soulié, David Oriot, Damien Diaz, and Benjamin Fradin de la Renaudière, "Smart digital fusion between visible color and infrared sensors," Proc. SPIE 10624, Infrared Technology and Applications XLIV, 106241G (Presented at SPIE Defense + Security: April 19, 2018; Published: 23 May 2018); https://doi.org/10.1117/12.2297106.
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