Picture compressing and restoring system and record pattern forming method for a spatial light modulator
US5537492A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 1993 |
| Grant date | Jul 16, 1996 |
| Priority date | — |
| Expiry date | May 25, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06E1/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Total image processing by way of high-speed parallel optical operations. A multiplication device memorizes a series of optical density figures representing a series of orthogonal function patterns and performs optical multiplications upon an original picture in comparison with each of the orthogonal function patterns. A summation device determines the expansion coefficients of the orthogonal functions for the whole original picture from the operation results obtained by the multiplication device. A quantizing and encoding device quantizes and encodes the orthogonal function expanding coefficients obtained by the summation device for compressing the data. The encoded data is transmitted to a picture restoring section which has the same optical system as the picture compressing section. This enables the system to conduct two-way picture encoding and restoring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.