Apparatus, method, and product for downscaling an image
US7116841B2 · kind B2 · utility
7Cited by
25References
58Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 30, 2001 |
| Grant date | Oct 3, 2006 |
| Priority date | — |
| Expiry date | Aug 28, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/391
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An average filter or filters is used in line with the output of an interpolation filter to downscale an image. The interpolation filter upscales a source image or bitmap of pixels into an intermediate form and the average filter or filters downscales the intermediate form to a destination image or bitmap of pixels. This configuration incorporates a small amount of logic with a relatively low incremental cost, enabling high quality downscaling of text and computer graphics content. The invention achieves quality comparable to a filter/scalar combination with more taps or a separate decimation pass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.