Invention Grant
- Patent Title: Halftoning method and apparatus using templates indexed by code
- Patent Title (中): 使用由代码编制的模板的半色调方法和装置
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Application No.: US13490374Application Date: 2012-06-06
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Publication No.: US08553286B2Publication Date: 2013-10-08
- Inventor: Leon Williams
- Applicant: Leon Williams
- Applicant Address: US CA Foster City
- Assignee: Electronics for Imaging, Inc.
- Current Assignee: Electronics for Imaging, Inc.
- Current Assignee Address: US CA Foster City
- Agency: Perkins Coie LLP
- Agent Michael A. Glenn
- Main IPC: H04N1/405
- IPC: H04N1/405 ; H04N1/409 ; G06K15/00 ; G06T5/00 ; G06T9/00

Abstract:
Techniques are provided that use one or more templates to improve the printing of non-saturated colored text and lines. Such templates are predetermined, fixed patterns which can be indexed or looked up via a code word with a fewer number of bits than in the corresponding template. Thus, such templates are used to increase the resolution or effective resolution of a display. In an embodiment, each template location represents a 4×4 region of binary pixels. The number of possibilities of template values is 2^(4*4) or 65,536. However, in accordance with an embodiment, only 256 of these 65,536 templates are available and are indexed by an 8 bit contone video value.
Public/Granted literature
- US20120314261A1 HALFTONING METHOD AND APPARATUS Public/Granted day:2012-12-13
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