The present invention relates to a method for image processing to generate, from a source image having a predefined width to height ratio, called initial ratio, and an information banner having predefined width to height ratio, called banner ratio, a final image having a width called final and a height called final and for which the width to height ratio, called final ratio, is different from the initial ratio, comprising the following steps: determine a ratio called useful according to the final ratio and the banner ratio, extract from the source image a part of the image having a width to height ratio equal to the useful ratio, and generate, from the part of the image extracted and the information banner, a final image comprising in juxtaposition an image representative of the extracted image part having a width to height ratio equal to the useful ratio and an image representative of the information banner having a width to height ratio equal to the banner ratio.