Camera-based document scanning system using multiple-pass mosaicking
US7046401B2 · kind B2 · utility
111Cited by
4References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2001 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Mar 29, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0436
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A camera-based document scanning system produces electronic versions of documents, based on a plurality of images of discrete portions of the documents. The system compares each pair of consecutive images and derives motion parameters that indicate the relative motion between each pair of consecutive images. The system utilizes the derived motion parameters to align and merge each image with respect to the previous images, thereby building a single, mosaic image of the document. In the illustrative embodiment, the motion parameters are derived by minimizing a sum of squared differences equation on a pixel-by-pixel basis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.