Apparatus and method for adaptive transformation of fractional pixel coordinates for calculating color values
US6587117B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2000 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Jul 2, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T11/001
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for adaptive interpolation of a color value for a destination pixel from color values of adjacent source pixels and the destination pixel's coordinate values. An adaptive color value interpolation circuit includes look-up-tables (LUTs) to store a plurality of values for each of the destination pixel's coordinates. Each of the LUTs provide to an interpolation circuit a selected one of the plurality of stored values in the LUTs according to the respective coordinate value. The interpolation circuit also receives the color values of the adjacent pixels. The interpolation circuit calculates the pixel's interpolated color value by weighting the color values of the adjacent pixels according to the selected values from the first and second LUTs. Instead of determining the pixel's color value by directly applying the destination pixel's coordinate values in the color weighting calculation, the pixel's color value is determined from weighting the source pixels' color values according to the stored values provided by the LUTs. Consequently, various interpolation functions may be simulated by the adaptive interpolation circuit by programming the appropriate values in the L…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.