1. A method for inverse tone mapping at least one original current image (It) of a sequence of images, the colors of which are represented in a color space separating luminance from chrominance, comprising: building an expansion exponent map (Et) from low pass motion-compensated temporal filtering of said original current image (It), building a luminance-enhancement map (Ytenh) from high pass motion-compensated temporal filtering of said original current image (It), inverse tone mapping the luminance (Yt(p)) of each pixel (p) of said original current image (It) into an expanded luminance (Ytexp(p)) obtained through the product of the luminance (Yt(p)) of said pixel at the power of an expansion exponent value (Et(p)) obtained for the corresponding pixel (p) in said expansion exponent map (Et) and of a luminance-enhancement value (Ytenh(p)) obtained for the corresponding pixel (p) in said luminance-enhancement map (Ytenh), and generating a corresponding expanded current image (Itexp) based on said expanded luminance (Y t exp (p)).