Spatial-filtering unit for performing adaptive edge-enhancement process
US5825937A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1997 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Mar 27, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A spatial-filter which includes a first filtering unit which performs a smoothing process on image data, the smoothing process being a process by which tone oscillations formed by tone levels are suppressed. A second filtering unit performs an adaptive edge-enhancement process on the image data which has previously undergone the smoothing process. The adaptive edge-enhancement process is a process by which sharpness of edges is enhanced, the edges being parts having steep tone gradients in the image. The manner of the adaptive edge-enhancement process depends on edge amounts present in the input image data. The edge amounts are amounts indicating how steep tone gradients of the tone levels represented by the image data are.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.