Method and apparatus for effecting spot/void filtering of image data
US5029226A · kind A · utility
26Cited by
16References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 10, 1989 |
| Grant date | Jul 2, 1991 |
| Priority date | — |
| Expiry date | Oct 10, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T1/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Apparatus for filtering digital image data which is initially presented in the form of an array of multi-bit pixels having plural scale values. Threshold means are provided for converting the scale value pixels to an array of binary pixels in which each pixel is associated with either background or image formation data. Patterns of neighboring pixels are examined and used to transform a center pixel in the window as a function of the detected pattern in a manner to remove isolated spots or voids from the image data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.