1. A method of conversion of a saturated image into a non-saturated image comprising: segmenting said saturated image in regions of pixels the colors of which have at least one color channel in a linear RGB color space which is saturated, and, for each s i ; r i of these saturated regions, among the different color channels providing color information in said linear RGB color space for the pixels of said region s i ; r i , selecting at least one color channel c ref , c′ ref,ri that is not saturated over pixels of said region s i ; r i , for each pixel of said region, replacing the color information of said pixel that is provided by the at least one saturated color channel of said region s 1 r i by a reconstructed non-saturated color information, wherein said reconstructed non-saturated color information is the sum of the color information provided by said at least one saturated color channel of said region for said pixel and of the difference between the color information provided by the selected at least one non-saturated color channel c ref ; c ref,ri for said pixel and a baseline color value ρ si ; ρ′ si computed for the region s i ; r i of said pixel, thus providing said converted non-saturated image.