Invention Grant
US07755638B2 Tinted edge enhancement using look-up table edge pixel identification
失效
有色边缘增强使用查找表边缘像素识别
- Patent Title: Tinted edge enhancement using look-up table edge pixel identification
- Patent Title (中): 有色边缘增强使用查找表边缘像素识别
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Application No.: US11318131Application Date: 2005-12-23
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Publication No.: US07755638B2Publication Date: 2010-07-13
- Inventor: Robert P. Loce , Beilei Xu , Stuart A. Schweid , Son H. Nguyen , Michael Branciforte
- Applicant: Robert P. Loce , Beilei Xu , Stuart A. Schweid , Son H. Nguyen , Michael Branciforte
- Applicant Address: US CT Norwalk
- Assignee: Xerox Corporation
- Current Assignee: Xerox Corporation
- Current Assignee Address: US CT Norwalk
- Agency: Fay Sharpe LLP
- Main IPC: G09G5/02
- IPC: G09G5/02

Abstract:
The present application is a method of producing digital image objects with enhanced halftone edges. The method operates by selecting a target pixel location within the digital image; observing a set of pixels within a pixel observation window superimposed on the digital image relative to the target pixel location; generating edge-state codes for a plurality of pairs of neighboring vectors of pixels within the pixel observation window; generating edge-identification codes from the plurality of edge-state codes using at least one look-up table; and, utilizing the edge-identification code to select and apply to the digital image at the target pixel either a first halftone screen having a first fundamental frequency and a first angle or a second halftone screen having a second fundamental frequency and a second angle, wherein the second frequency and second angle are harmonically matched to the first frequency and first angle. The method solves the problem of ragged edges on halftone tints as an automated, operation, with a computing architecture that is readily adapted to a wide variety of tinted edge conditions, and which can be readily adapted to real-time applications.
Public/Granted literature
- US20070146796A1 Tinted edge enhancement using look-up table edge pixel identification Public/Granted day:2007-06-28
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