Telecine reference element, system, and method for providing scene exposure information
US6115062A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1997 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | May 6, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of transferring a scene recorded on photographic negative film to video using a telecine is disclosed comprising the steps of: PA1 a) setting up the telecine so that predetermined waveform readings are obtained for a reference element comprising at least one gray scale portion comprising density patches corresponding to three known density values; PA1 b) storing the telecine set-up settings; PA1 c) loading a scene on photographic negative film into the telecine wherein the scene includes a gray card; PA1 d) using the stored telecine settings to effect transfer of the scene to video; PA1 e) determining red, green and blue video voltages for the gray card; and PA1 f) converting the red, green and blue video voltages to Transfer Points between 0 and 50 to provide exposure information for the scene. The reference element preferably comprises density patches which correspond to densities obtained in a color negative film after correctly exposing the film to a target comprising a 3% reflectance black, an 18% reflectance gray and a 90% reflectance white region, and standard photographic processing. Advantageously, the gray scale portion fills a full frame on the element. In a pre…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.