Patent ID: 8654400
Filing Date: 2014-02-18
Classification: H04N

Abstract:
1. A computer system executed process for generating 1-bit image data from multiple-bit image data, the process comprising the steps of: receiving, by the computer system, multiple-bit image data comprising multiple-bit pixel values; and deriving, by the computer system, from the multiple-bit pixel values 1-bit image data comprising “on” and “off” pixel values, each pixel value of the 1-bit image data corresponding to a pixel of an output medium, which pixel an output device would attempt to mark when printing the 1-bit image data if the pixel value were “on”, the 1-bit image data producing when printed an image constituted by dots, each dot corresponding to a plurality of pixel values of the 1-bit image data, which pixel values correspond to a block of M*N horizontally and/or vertically adjacent pixels of an output medium, at least one of M and N being greater than one, wherein for at least some of the dots, where M or N is equal to one, a pixel value corresponding to a first or last pixel of a row of horizontally adjacent pixels, or to a first or last pixel of a column of vertically adjacent pixels, is “off”, and where both M and N are greater than one, at least one pixel value corresponding to a pixel of a first or last row of horizontally adjacent pixels is “off” and/or at least one pixel value corresponding to a pixel of a first or last column of vertically adjacent pixels is “off”.