Apparatus and method for transforming a video image into a three dimensional video image with shadows
US5361100A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1993 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Apr 6, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is described a video special effects apparatus 1 comprising: transforming means 2, 10, 12, 14 for mapping an input video image (FIG. 3A) onto a three-dimensional surface (FIG. 3B) to form a transformed image; luminance level calculating means 16 for calculating luminance levels I.sub.out for parts of said transformed image to produce an effect of a positive light source P generating positive light that increases luminance levels of parts of said transformed image corresponding to parts of said three-dimensional surface where said positive light is incident and a negative light source N generating negative light that decreases luminance levels of parts of said transformed image corresponding to parts of said three-dimensional surface where said negative light is incident; and luminance level control means 6 for controlling luminance levels of parts of said transformed image in dependence upon said calculated luminance levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.