Digitalisation of pictures and data graphs

The aim of the model of digitalisation presented in this paper is twofold: 1) The model must allow the representation of topological, and geometrical properties of digitalised pictures on any Kind of grid or the description of texture just in terms of strings of characters over a finite set, avoiding us to carry a coordinate system which cauld be heavy. 2) It must helps to implement the picture into the random acces memory of a computer. This is done by remarking that. the model introduced here is a restriction of the concept of data graphs, which are objects, now extensively studied, and whose aim is (among others) to provide tools for the implementation of all classes of data structures.