Method for image format conversion with insertion of an information banner

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 said initial ratio, wherein it comprises the following steps:

• determine, from said final ratio and said banner ratio, a width to height ratio, called useful ratio, of an image called useful ratio, an image called useful so that, for a useful image and an information banner having a width equal to a final width, the height of the useful image is equal to the difference between the final height and the height of the information banner or so that, for a useful image and an information banner having a height equal to the final height, the width of the useful image is equal to the difference between the final width and the width of the information banner,
• 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 said extracted image part having a width to height ratio equal to the useful ratio and an image representative of said information banner having a width to height ratio equal to the banner ratio.