1. A method for texture synthesis based on digital video signals which are associated with sample blocks of pixels constituting a reference sample, said method comprising the steps of: a) ascertaining and storing a plurality of sample values representing structural characteristics of, or associated with, said reference sample; b) forming an approximate synthesis picture by progressive growth based upon said sample values and said reference sample; c) subdividing said approximate synthesis picture into a plurality of approximate pixel blocks each having an identical size; d) creating a dictionary for storing those sample blocks of said reference sample which have the same size as said approximate pixel blocks; and e) forming a definitive synthesis picture by substituting, as a function of a predetermined criterion, each of said approximate pixel blocks for a sample block stored in said dictionary.