Imaging apparatus and image processing method therefor
US7486310B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2004 |
| Grant date | Feb 3, 2009 |
| Priority date | — |
| Expiry date | Oct 16, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/1478
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital camera has a CPU and an image processing apparatus. The image processing apparatus acquires a contour from an image acquired by shooting a whiteboard as a shooting target by using a Roberts filter. The image processing apparatus detects straight lines to be candidates which form the image of the whiteboard from the acquired contour, and acquires the rectangular shape of the whiteboard. The image processing apparatus acquires projection parameters indicating the relationship between the image of the whiteboard and the real whiteboard from vertex positions of the quadrangle, and performs projection transformation of the image of the whiteboard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.