EP0531084A3
Multi-layer atmospheric fading in real-time computer image generator
Abstract
The effect of multi-layer atmospheric scattering on the visibility F of each point P on a visible surface of each polygon in a display scene, in a computer image generation (CIG) system, is provided by determining the effective average reciprocal half-fading distance between viewpoint and the viewed point, knowing the altitudes at which each of the different scattering layers start and accounting for any transitional slopes therebetween. The total reduced visibility of that viewed point P is a function of the average reciprocal half-fading distance for that point and of the total range between the viewed point P and the viewpoint VP.
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Projected expiry passed 1 September 2012, 14.1 years ago.
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1 sheet
Sheet 1
Every citation, both ways
| Document | Relation | Office | Category | Cited during |
|---|---|---|---|---|
| WO9118359A1 | Cites | World Intellectual Property Organization (WIPO) | XP | Search report |
| COMPUTER DESIGN vol. 27, no. 1, August 1988, LITTLETON, MASSACHUSETTS US pages 50 - 61 WILLIAMS 'GRAPHICS SYSTEM DESIGNERS STRIVE FOR PHOTOREALISM' | Non-patent | – | – | Search report |
| MAMMEN A.: "TRANSPARENCY AND ANTIALIASING ALGORITHMS IMPLEMENTED WITH THE VIRTUAL PIXEL MAPS TECHNIQUE.", IEEE COMPUTER GRAPHICS AND APPLICATIONS., IEEE SERVICE CENTER, NEW YORK, NY., US, vol. 09., no. 04., 1 July 1989 (1989-07-01), US, pages 43 - 55., XP000115865, ISSN: 0272-1716, DOI: 10.1109/38.31463 | Non-patent | – | – | Search report |
| HEALEY G.: "COLOR REFLECTANCE MODELS FOR RECOGNITION AND COMPUTER GRAPHICS.", PROCEEDINGS OF THE ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS AND COMPUTERS. PACIFIC GROVE, NOV. 5 - 7, 1990., NEW YORK, IEEE., US, vol. 01 OF 02., 5 November 1990 (1990-11-05), US, pages 399 - 403., XP000280052 | Non-patent | – | – | Search report |
11 members in 6 offices
Priority claims4
| Document | Office | Kind | Date |
|---|---|---|---|
| 754494 | United States of America | – | |
| 75449491 | United States of America | A | |
| 75449491 | United States of America | A | |
| US19910754494 | – | – | – |
Members11
| Document | Office | Kind | |
|---|---|---|---|
| IL102836A0 | Israel | A0 | |
| EP0531084A2 | European Patent Office (EPO) | A2 | |
| JPH05205032A | Japan | A | |
| EP0531084A3This record | European Patent Office (EPO) | A3 | |
| TW225595B | Taiwan Province of China | B | |
| US5357579A | United States of America | A | |
| IL102836A | Israel | A | |
| EP0531084B1 | European Patent Office (EPO) | B1 | |
| JP3191180B2 | Japan | B2 | |
| DE69231922D1 | Germany | D1 | |
| DE69231922T2 | Germany | T2 |
30 legal events, as 3 offices reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | Office | |
|---|---|---|---|
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Notification of lapseLapsedST | ST | FR | |
| Gb: european patent ceased through non-payment of renewal feeCeasedGBPC | GBPC | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| No opposition filedOpposition26N | 26N | EP | |
| No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE | PLBE | EP | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA | STAA | EP | |
| Party data changed (patent owner data changed or rights of a patent transferred)RAP2 | RAP2 | EP | |
| European patent in force as of 2002-01-01IF02 | IF02 | GB | |
| Fr: translation filedET | ET | EP | |
| Corresponds to:REF | REF | EP | |
| Designated contracting statesAK | AK | EP | |
| (expected) grantORIGINAL CODE: 0009210GRAA | GRAA | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOS IGRAGRAH | GRAH | EP | |
| Despatch of communication of intention to grantORIGINAL CODE: EPIDOS AGRAGRAG | GRAG | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOS IGRAGRAH | GRAH | EP | |
| Despatch of communication of intention to grantORIGINAL CODE: EPIDOS AGRAGRAG | GRAG | EP | |
| Information provided on ipc code assigned before grant7G 06T 15/50 ARIC1 | RIC1 | EP | |
| First examination report despatched17Q | 17Q | EP | |
| Request for examination filed17P | 17P | EP | |
| Designated contracting statesAK | AK | EP | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | EP | |
| Designated contracting statesAK | AK | EP | |
| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI | EP |
Numbers
- Publication
- 0531084
- Publication, DOCDB
- 0531084
- Publication, EPODOC
- EP0531084
- Application
- 307912
- Application, DOCDB
- 92307912
- Application, EPODOC
- EP19920307912
Titles3
- German
- Mehrschichtige atmosphärische Überblendung in Echtzeit-Rechnerbildgenerator
- English
- Multi-layer atmospheric fading in real-time computer image generator
- French
- Atténuation atmosphérique multi-couche dans un générateur d'image par calculateur en temps réel
Classification
- CPC, 1
- G06T15/50
- IPC, 1
- G06T15 50
Designated states1
- Contracting states, 1
- Italy