Apparatus and method for capturing a composite digital image with regions of varied focus and magnification
US6975352B2 · kind B2 · utility
25Cited by
14References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2000 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Jun 3, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/661
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A camera apparatus obtains a sharp, high-resolution image of an object which is difficult to focus in a single image at a fixed focus, such as the imaging of a document using a document camera held at an oblique angle to the document. The apparatus composites an image of an object from plural image segments of the object acquired at different focusing distances. High quality regions (i.e. sharply focused and/or high resolution) are extracted from each image to form the segments for compositing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.