Anti-alias font generation
US5390289A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1993 |
| Grant date | Feb 14, 1995 |
| Priority date | — |
| Expiry date | Dec 17, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of generating a second, substantially anti-aliased, representation of a character from a first representation. The second representation is comprised of horizontal lines of dots that are shifted horizontally relative to dots of the first representation, each dot of the first representation having a value DOT1 associated therewith. The method include a step of, for each horizontal line (1-m) within the first representation of a character and for each dot (1-j) within a horizontal line, (a) determining a modifying value (DOT1k) associated with a dot(k) of the first representation, DOT1k being a function of DOT1 of the dot(k). The method includes another step of determining a value (DOT2k) of a corresponding dot for the second representation, the value of the corresponding dot being determined in accordance with the expression DOT2k=((DOT1-DOT1k )+DOT1(k-1)), where DOT1(k-1) is a modifying value of an adjacent dot on the horizontal line. The modifying value is preferably determined by a table lookup procedure within a table of previously generated values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.