Method and apparatus for producing color internegatives with a digital printer
US5329383A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1993 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Apr 6, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved method of producing positive photographic prints in hybrid photofinishing system employing a digital image printer to produce an intermediate negative image on a non-photographic medium wherein digital data used to print the negative includes code values simulating an orange mask effect in the negative. The improvement in the method involves a reduction in the orange mask values in the digital data so as to reduce the D-max values required for digitally printing the intermediate negative thereby reducing print cost and throughput time in the process. In a further improvement, the printer code values for pixels corresponding to full white in the final image are forced to values that print as black in the negative thereby eliminating the orange mask effect for these pixels and rendering improved rendition of full white areas in the final image print.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.