Hybrid slow scan resolution conversion
US5221976A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1991 |
| Grant date | Jun 22, 1993 |
| Priority date | — |
| Expiry date | May 3, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04756
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an image input scanner, image information is acquired by sensing light from an image at an array of photosites arranged across a path of relative movement of the array and the image. To obtain resolution k, given a nominal slow scan velocity v for the relative movement between the array and the image, slow scan velocity is varied continuously over a range of 1/2 v to v. In combination, with variation of slow scan velocity over the range of 1/2 v to v, a limited scan line throw away scheme is matched to the range of velocity, where the ratio of lines kept to lines discarded in a group of lines is defined by the ratio 1:N where for every N lines, a pattern is repeated which passes 1 line of N lines, where N is a positive integer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.