Digital image signal processing
US5910795A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1994 |
| Grant date | Jun 8, 1999 |
| Priority date | — |
| Expiry date | Nov 14, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/40
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A raster scanned image may be scaled up or down for display on e.g. a portion of a computer display. This is achieved by dividing the image into a plurality of image cells each with a horizontal width less than that of the whole image. A smoothing algorithm is then applied to the lines of each cell in turn to generate new pixel data in dependence on the scaling operation to be performed. The scaling means stores a number of lines of data from a cell the number being dependent on the particular smoothing algorithm being used. To facilitate scanning of the image cell structure additional sync pulses are generated. These are cell horizontal and cell vertical sync pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.