Patent ID: 8004721
Filing Date: 2011-08-23
Classification: H04N

Abstract:
1. A printer system, comprising: a memory for storing an image for rendering; and a halftoning processor, coupled to the memory, for processing the image in the memory according to a halftone threshold matrix, the halftoning processor for converting input gray-scale images into a dot pattern representing binary images to render the image, wherein the halftone threshold matrix comprises a supercell comprising a plurality of submatrices, the plurality of submatrices comprising a first group of submatrices and a second group of submatrices, wherein each matrix in the first group of submatrices is formed using a jXk submatrix and each matrix in the second group of submatrices is formed using a nXm submatrix, wherein j, k, m and n are integers and wherein j, k, m and n are not all equal and form the supercell with more than one shape and size of submatrices, and wherein at least one submatrix is filled in faster than the other submatrices in the supercell by turning on a predetermined number of pels less than all of the pels in the at least one submatrix to increase input levels without alternating to the other submatrices to turn on pels until the predetermined number of pels have been turned on.