Patent ID: 8031373
Filing Date: 2011-10-04
Classification: H04N

Abstract:
1. A method for screening the continuous-tone original to form its halftone copy by transformation of an input two-dimensional signal (E i,k ) of tone of an original, this signal comprising the multilevel tone values of an original areas and presented in the matrix ([E i,k ], m,n ) of m×n areas, into a two-dimensional signal (E hftn i,k ) of a halftone copy, the input two-dimensional signal comprising the bi-level tone values of printing and non-printing elements and presented in the matrix ([E hftn i,k ] m,n ) of m×n elements, the method performed by a halftone processor included in a reproducing device, the halftone processor includes a halftone copy signal former, a first weight values distributor, a second weight values distributor, a contour trace signal generator, and a segments signal forming unit, comprising: forming, by the halftone copy signal former, the two-dimensional signals (E distributing, by the first weight values distributor, the values (E forming, by the halftone copy signal former, the two-dimensional signal (E forming the halftone copy on a substrate dark or light by the reproducing device in accordance with the formed two-dimensional signal, wherein, the method further comprising: placing the part of weight values of said second matrix within the spatial intervals -segments; ascertaining, by the contour trace signal generator, the location of said segments by means of forming the contour trace signal E ascertaining, by the segments signal forming unit, the position of boundaries of said segments dependant on the number of adjacent elements used for the contour or fine detail reproduction on a halftone copy of an original.