1. A method, comprising: generating an image from a set of image zones each being delimited by a contour of polygonal shape defined by a set of vertexes, each image zone including pixels having an attribute value which can be deduced from a value of a corresponding attribute of each of the vertexes of the image zone, the generating including: determining, to within a pixel, the pixels that belong to each image zone as a function of dimensions, in number of pixels, of the image to be generated, associating the pixels of each image zone in blocks, at least some of the blocks of each image zone including plural 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.