AUTOMATIC OPTIMIZATION OF THE POSITION OF STEMS OF TEXT CHARACTERS

WIPO Patent Application WO2001078053

A3

The present invention provides for automatic placement of typographical features such as vertical stems or horizontal segments of a character (205) on high contrast pixel sub-component boundaries as part of a rendering process that uses separately controllable pixel sub-components (202, 203, 204) of pixels to represent different portions of the character (205). In order to identify the typographical features of the character (205) that are to be aligned with high contrast pixel sub-component boundaries, topology of the character is analyzed at runtime. In display devices having vertical stripes of same-colored pixel sub-components (202, 203, 204), it has been found that character legibility is increased when the left edges of stems (206) are aligned with high contrast boundaries (208) between pixel sub-components. Processing time and resources are conserved by performing a partial, rather than a full, topological analysis of the character. For example, some font files include data structures that define the position of key control points associated with the character, thereby indicating where the stems or other typographical features are located, and the relationship between different typographical features.

STAMM BEAT
HITCHCOCK GREGORY C
BETRISEY CLAUDE
CONWAY MATT

PCT/US2001/011489

July 25, 2002

April 09, 2001

Click for automatic bibliography generation  

MICROSOFT CORP (US)

G09G3/36; G06T11/00; G06T11/20; G09G3/20; G09G5/00; G09G5/28; G09G5/02; G09G5/24; (IPC1-7): G09G5/28

WO2000021037A1	2000-04-13
WO2000067247A1	2000-11-09

US5821913A	1998-10-13
EP0673012A2	1995-09-20
US5450208A	1995-09-12

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