A method generates an image from a set of image zones each delimited by a contour of polygonal shape defined by a set of vertexes, and comprising pixels having an attribute value which can be deduced from the value of a corresponding attribute of each of the vertexes of the image zone. The method includes determining to within a pixel the pixels that belong to each image zone according to the dimensions in number of pixels of the image to be generated; associating the pixels of each image zone in blocks of pixels; and determining an attribute value for each block of pixels of each image zone as a function of the value of the corresponding attribute of each vertex of the image zone.