1. In a method of depicting a half-tone image in which the image is formed in grey steps extending between black and white and in which the image is generated from equisized image dots disposed in predetermined grid positions and of a number per unit area which determines the specific grey step, the improvement comprising the step of: forming the image dots in grid positions which include three lines of orientation in which each grid position is surrounded by six directly adjacent grid positions and is equidistant from such grid positions.