Dual video camera system for scanning hardcopy documents
US6493469B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1999 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Jun 28, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0436
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A face-up document scanning apparatus stitches views from multiple video cameras together to form a composite image. The document scanning apparatus includes an image acquisition system and a frame merger module. The image acquisition, which is mounted over the surface of a desk on which a hardcopy document is placed, has two video cameras for simultaneously recording two overlapping images of different portions of the hardcopy document. By overlapping a portion of the recorded images, the document scanning apparatus can accommodate hardcopy documents of varying thickness. Once the overlapping images are recorded by the image acquisition system, the frame merger module assembles a composite image by identifying the region of overlap between the overlapping images. The composite image is subsequently transmitted for display on a standalone device or as part of a video conferencing system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.