1. A method for generating a two-dimensional image from a two-dimensional original set of data defining a chromatic or monochrome value distribution, wherein: a) the supporting points of the original data set are corner points of rectangles, which are sub-divided into triangles; b) chromatic or monochrome values are assigned to the interior portion of the triangles by interpolating the chromatic or monochrome values at the corner points of the triangles, to generate a continuum data model; c) the corner points are shifted to reduce or minimise the curvatures of the area defined by the chromatic or monochrome value distribution, thereby shifting the continuum data model correspondingly; and d) a two-dimensional, more particularly orthogonal, image is generated from the shifted continuum data model.