Perspective projection calculation devices and methods
US6236404A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2000 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Mar 28, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image processing system for perspectively projecting a triangle defined in a three-dimensional space onto a two-dimensional space and shading the triangle in the two-dimensional space, includes a memory which stores at least inverses of depth coordinates; a CPU which calculates a plane slope element coefficient which implies a plane slope element of the triangle defined in the three-dimensional space, and calculates an interpolation coefficient from the plane slope element coefficient; and a graphics processor which makes a perspective correction using the interpolation coefficient and inverses of depth coordinates stored in the memory. The graphics processor may output inverses of depth coordinates for storage in the memory in advance, and may output a result of the perspective correction for storage in the memory. The image processing system may also include a display for displaying a result of the perspective correction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.