Reduced storage of pre-computed difference tables used in color space conversion
US5592591A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1993 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Oct 4, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An interpolation calculation requires a plurality of difference signals representing the distances to a set of neighboring colors in space. However, at least some of the plurality of difference signals required for interpolation of a color within the boundary defined by the known color and the set of neighboring colors are also required for interpolation of another color within the boundaries defined by a neighboring known color and its set of neighboring known colors. Accordingly, rather than redundantly storing the difference values, a storage and retrieval scheme is used which only stores non-redundant difference signals, and retrieves from addresses associated with neighboring colors the appropriate difference signals for a given interpolation calculations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.