Method for decamouflaging an object in a scene observed by a plurality of devices comprising a device for acquiring images, called multi-spectral images, comprising a plurality of components, each one representative of a spectral band comprised in a visible and/or near-infrared and/or short-wavelength-infrared domain and a device for acquiring images, called thermal images, comprising at least one component representative of a spectral band comprised in the mid-infrared and/or the long-wavelength infrared, characterized in that the method comprises: obtaining a multi-spectral image and a thermal image, each component of the multi-spectral image and each component of the thermal image being spatially and temporally harmonized with each other; obtaining at least one position of a sub-part of an image, called a window, and, for each obtained position: • extracting a window from both the multi-spectral image and thermal image at said position; • applying a contrast accentuation procedure to at least one of the extracted windows comprising a window extracted from the multi-spectral image, said procedure, when it is applied to a window allowing a window, called an improved window, to be obtained in which a contrast between pixels corresponding to the object and pixels not corresponding to the object is accentuated; • forming a multi-component window, each obtained improved window and each extracted window on which said procedure has not been applied providing at least one component of the multi-component window; and • applying said procedure to the multi-component window; generating an image, called a reconstruction image, by inserting each improved window obtained by applying said procedure to each formed multi-component window into a receiving image representative of the scene. obtaining a multi-spectral image and a thermal image, each component of the multi-spectral image and each component of the thermal image being spatially and temporally harmonized with each other; obtaining at least one position of a sub-part of an image, called a window, and, for each obtained position: • extracting a window from both the multi-spectral image and thermal image at said position; • applying a contrast accentuation procedure to at least one of the extracted windows comprising a window extracted from the multi-spectral image, said procedure, when it is applied to a window allowing a window, called an improved window, to be obtained in which a contrast between pixels corresponding to the object and pixels not corresponding to the object is accentuated; • forming a multi-component window, each obtained improved window and each extracted window on which said procedure has not been applied providing at least one component of the multi-component window; and • applying said procedure to the multi-component window; • extracting a window from both the multi-spectral image and thermal image at said position; • applying a contrast accentuation procedure to at least one of the extracted windows comprising a window extracted from the multi-spectral image, said procedure, when it is applied to a window allowing a window, called an improved window, to be obtained in which a contrast between pixels corresponding to the object and pixels not corresponding to the object is accentuated; • forming a multi-component window, each obtained improved window and each extracted window on which said procedure has not been applied providing at least one component of the multi-component window; and • applying said procedure to the multi-component window; generating an image, called a reconstruction image, by inserting each improved window obtained by applying said procedure to each formed multi-component window into a receiving image representative of the scene.