Method and apparatus for compressing Bezier descriptions of letterforms in outline fonts using vector quantization techniques
US6992671B1 · kind B1 · utility
23Cited by
13References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2000 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Mar 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/94
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Vector quantization provides font contour data reduction. Characters are defined in a font collection using segmented outline forms and common references stored to curve segments for similar segments in different characters of the font collection. Compressing the font collection preferably includes applying an entropy encoding data reduction. The common references are stored in a segment storage location. Another aspect includes decompressing a font store containing a compressed collection of outline fonts. The uncompressed curve segments are scaled so as to match a requested size for a letterform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.