Digital photofinishing system including film under-exposure gamma, scene balance, and image sharpening digital image processing
US6097471A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1998 |
| Grant date | Aug 1, 2000 |
| Priority date | — |
| Expiry date | May 28, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6094
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of digital photofinishing comprising the steps of: producing a digital color image in optical printing densities of a color image captured on photographic media; increasing the under-exposure gamma of the digital color image using a media under-exposure gamma adjustment algorithm; processing the under-exposure gamma adjusted digital color image with a scene balance algorithm to produce a balanced digital color image; mapping the balanced digital color image through a hard copy media characteristic curve to produce a balanced digital image mapped to print densities of the hard copy media; sharpening the mapped balanced digital color image with a sharpening algorithm optimized to avoid unacceptable artifacts; and digitally printing the sharpened digital color image onto hard copy media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.