Method of mapping geometric entities from a continuous plane to a discrete plane
US4991115A · kind A · utility
21Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | May 16, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/0002
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for generating mask transparencies for the mass production of printed circuit boards using a laser photoplotting system includes an algorithm for mapping geometric entities from the continuous plane such as is used in vector photoplotting to a pixel graphic representation of the geometric entities. The method reduces offset errors between rectangular entities and circular entities in phototool primitives constructed in the discrete pixel graphic system by selecting a pixel to represent the corner of the rectangular entity that is closest to the circumference of the circular entity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.