Process for the extraction of spectral image records from dye image forming photographic elements
US5391443A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1992 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Oct 26, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3041
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method is disclosed of extracting independent spectral image records from an imagewise exposed photographic element that contains superimposed silver halide exposure recording layer units each containing a latent image derived from a selected region of the spectrum. The photographic element contains N+1 superimposed silver halide exposure recording units. Photographic processing is conducted to produce a silver image in N+1 of the exposure recording units and a dye image distinguishable from other dye images in at least N exposure recording layer units. The photographic element is in one instance scanned in a spectral region of silver absorption and minimal image dye absorption to provide a first image density record, and the photographic element is also in N spectral regions wherein maximum density of a different image dye occurs to provide N additional image density records. Information from the separate image density records is converted to N+1 image records each corresponding to a different latent image in the exposed photographic element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.