Method and apparatus for input picture enhancement by removal of undersired dots and voids
US4646355A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1985 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | Mar 15, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for removing undesirable dots and voids which are smaller than the user defined smallest data item of a bit-map image of a picture being scanned by a picture coding system. The bit-map is delayed as it is being generated to form a series of tessellations or windows of data of selected sizes. The windows are propagated through a series of neighborhood-logic elements which with the output data level of the outer ring of neighborhood-logic elements which define the window being examined to determine if those data levels are all of the same sense. If they are all of the same sense, then all of the neighborhood-logic elements which define the interior of the window are set or cleared so that the output data levels of all of the neighborhood-logic elements which define the window are of the same sense.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.