Digital photofinishing system including scene balance, contrast normalization, and image sharpening digital image processing
US6097470A · 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; processing the digital image with a scene balance algorithm to produce a balanced digital color image; using a contrast normalization algorithm, remapping the balanced digital color image to a preferred tone reproduction position; mapping the contrast normalized digital color image through a hard copy media characteristic curve to produce a digital image mapped to print densities of the hard copy media; sharpening the mapped 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.