Color negative film with contrast adjusted for electronic scanning
US5500316A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1994 |
| Grant date | Mar 19, 1996 |
| Priority date | — |
| Expiry date | Dec 5, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The process for forming a video image with a telecine transfer device typically comprises (a) exposing a color negative photographic film comprising red, green and blue color sensitive records which generate image dyes upon exposure and processing of the film, (b) processing the exposed film to form a developed image, and (c) converting the developed image into video signals representative of the developed image with a telecine transfer device, wherein the peak spectral absorbance wavelength of the image dyes generated by the red color record of the film is substantially more offset from the red peak spectral response of the telecine transfer device than the peak spectral absorbance wavelength of the image dyes generated by the green color record of the film is offset from the green peak spectral response of the the telecine transfer device. An improvement is described comprising using a film in the process wherein the contrast of the red color record relative to the contrast of the green color record is set to compensate for reduced modulation of red density relative to green density in the telecine transfer device, and to result in a red channel to green channel contrast ratio in…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.