METHOD AND DEVICE FOR ESTABLISHING FRAMES BY DIFFUSION OF VECTOR ERRORS FROM TABLES

摘要

The present invention relates to a method for establishing a frame (1) by vector error diffusion, realizing a representation (15) of the pixels in said "vectors" (20) in a space (2) of which at least one dimension corresponds to a chromatic or luminance component and in which certain vectors, called "reference vectors" (51), represent a color combination directly printable or viewable by the devices to which the frame is intended, characterized in that it comprises a step of extracting the reference vector (51) closest to a given vector (20), by consultation (30) of at least one table (3) of correspondence between an input index (29) of a vector (20) given in the correspondence table (3) and a reference index (31) of the reference vector (51) closest to said given vector (20), said correspondence table (3) being of reduced dimensions compared to the number of pix vectors el color possible, thanks to the fact that an index (8) input into this table (3) corresponds to a plurality of vectors (80) having their end in the same region (8) of said space (2) multidimensional, in which the approximation (82) of these vectors (80) to the vector (81) whose end is in the center of the region introduces an invisible error by the human eye. / P