Invention Grant
US08149463B2 Information processing apparatus, image processing apparatus and method thereof, which create and use a halftone screen
有权
信息处理设备，图像处理设备及其方法，其创建并使用半色调屏幕
- Patent Title: Information processing apparatus, image processing apparatus and method thereof, which create and use a halftone screen
- Patent Title (中): 信息处理设备，图像处理设备及其方法，其创建并使用半色调屏幕
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Application No.: US12246977Application Date: 2008-10-07
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Publication No.: US08149463B2Publication Date: 2012-04-03
- Inventor: Naoto Kawamura
- Applicant: Naoto Kawamura
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon USA Inc IP Division
- Priority: JP2007-269529 20071016
- Main IPC: G06K15/00
- IPC: G06K15/00 ; H04N1/405
Abstract:
A halftone screen which is applicable to a low-resolution electrophotographic printer is created. Hence, dot-lattice points arranged in a predetermined region are displaced using rotation processing, the predetermined region is partitioned into polygons each of which surrounds the dot-lattice point. Then, a threshold matrix used to grow a halftone dot, which is surrounded by each polygon, in a direction of the displacement is generated.
Public/Granted literature
- US20090097073A1 INFORMATION PROCESSING APPARATUS, IMAGE PROCESSING APPARATUS AND METHOD THEREOF Public/Granted day:2009-04-16
Information query
