High quality digital scaling using image tags
US6563963B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2000 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Mar 8, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/3935
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for selective scaling of an image by selective implementation of a window averaging processing technique or an interpolation processing technique. For enlargement scaling, the interpolation processor is implemented. For reduction scaling, the window averaging processor is implemented. For anamorphic scaling, the window averaging processor may be selected and implemented for reduction processing pursuant to a two-pass processing technique wherein the interpolator processing will be implemented thereafter.Image tags are provided for selective scaling of each area of an image according to the type of content of each area by selective implementation of a window averaging processing technique or an interpolation processing technique. The interpolation processor is implemented for line drawing areas of an image, and the window averaging processor is implemented for contone areas of the image. For anamorphic scaling with image tags, a two-pass system is provided which performs a first-pass reduction in one direction followed by a second-pass enlargement in the remaining direction, wherein the reduction is performed in the manner described for reduction scaling. A one-p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.