Patent ID: 9137422
Filing Date: 2015-09-15
Classification: H04N

Abstract:
1. A method comprising: receiving, by a halftone image processing module of a printing device, a halftone image, wherein the halftone image comprises a plurality of pixels, wherein each pixel of the plurality of pixels of the halftone image includes pixel data associated with a plurality of color planes; forming a pixel group, wherein the pixel group includes (i) a target pixel of the plurality of pixels, and (ii) one or more pixels of the plurality of pixels that are neighboring to the target pixel; generating a pixel window for the pixel group; comparing the pixel window with a plurality of candidate patterns; determining that the pixel window matches with at least one of the plurality of candidate patterns; and based on determining that the pixel window matches with at least one of the plurality of candidate patterns, performing an image processing operation on the pixel group of the halftone image, wherein performing the image processing operation further comprises reducing a tone of one or more color planes of a subset of pixels in the pixel group, wherein reducing the tone of one or more color planes of the subset of pixels in the pixel group further comprises