Method and apparatus for providing images in portable 2-D scanners
US6546152B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 2000 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | May 4, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for providing images in 2-D scanners are disclosed. According to one aspect of the system, a series of images are successively generated from a sensing module in a scanner as the scanner is moving across a scanning document. A first image is initially kept in a memory. When a second image becomes available, an overlapping between the first image and the second image is located. From the overlapping, it is to determine if the stored first image is precisely registered with the second image. If the two images are registered, a signal-to-noise enhanced image is obtained by averaging the two images. If the two images are not registered, a combined image is obtained by combining the two images. Either the signal-to-noise enhanced image or the combined image is then stored in the memory to work with the next image. The process is repeated till all the images are processed. As a result, a signal-to-noise enhanced image or a combined image representing the entire document is produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.