Oblique projection original and oblique projection original forming apparatus and method
US4422153A · kind A · utility
13Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1980 |
| Grant date | Dec 20, 1983 |
| Priority date | — |
| Expiry date | Sep 15, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/001
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An oblique projection original is formed by deforming an orthogonal projection original in such a manner that a rectangular original is transformed into a trapezoidal original by compressing the orthogonal projection original by thinning scanning lines in a horizontal direction. In addition, predetermined bits in each scanning line are thinned in a vertical direction, and each line is compressed by reducing first and last portions of each line by half the number of bits thus thinned. Finally, white bits are inserted at the first and last portions of each scanning line to complete each scanning line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.