Patent Document ID: 4651228
Application ID: 06784356
Patent Status: 1

Claim One:
1. In a method for representation of a halftone image wherein the halftone image is formed of different intensity stages produced by use of picture elements of identical size situated at prescribed grid positions of a two-dimensional grid, a respectively prescribed plurality of grid positions of the grid being combined to form an image spot, and wherein the number of picture elements and their grid positions within the image spot define the respective intensity stages, wherein the improvement comprises the steps of: designing the grid of the picture elements of the image spots such that, based upon a curve of amplitude versus locus or spatial frequency, for an identified detection limit of the ability to perceive sinusoidal grids in the halftone image, an amplitude of individual components of a locus or spatial frequency spectrum of all intensity stages of the two-dimensional grid does not exceed the identified detection limit given a prescribed dissolve distance of the intensity stage having only one grid picture element per image spot.