Character extracting method from complecate background color image based on run-length adjacent map
Title：
Character extracting method from complecate background color image based on run-length adjacent map
Application Number：
 200410062261
Application Date：
 2004/07/02
Announcement Date：
 2005/03/02
Pub. Date：
 2007/04/25
Publication Number：
 1588431
Announcement Number：
 1312625
Grant Date：
 2007-4-25
Granted Pub. Date：
 2007-4-25
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 G06K 9/80, G06K 9/00
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Liu Changsong, Ding Xiaoqing, Chen Youxin
Key Words：
 Character, extracting method, complecate background, color image, run-length adjacent map
Abstract：
 The invention is a character extracting method in complex background color image based on runlength adjacency graph, which belongs to character extracting field in preprocess of color image character identification. All color connection sections are acquired with CRAG (color run-length adjacency graph) region growing algorithm after the digital color image is acquired, then the color average is carried on with color classification, acquires several color centers, forms different color layers with the color centers, then the color connection regions accordant to connection region differentiation rule are distributed onto several color layers. Finally the character is selected out through character analysis and size consistency differentiation, and acquires the character image. The method has a high speed and accuracy.
Claim：
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PCT：
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2008-4-17
  Selected patents owned by Tsinghua University filed in 2005 are loaded.
2008-3-31
  Selected patents owned by Tsinghua University filed in 2006 and 2007 are load.







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