Image processing apparatus for correcting distortion of image and image shooting apparatus for correcting distortion of shot image
US7619663B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2005 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Jun 9, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/80
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A digital camera acquires the image of an original including an original from a shot image acquired by shooting. The digital camera reduces the image of the original and corrects distortion of the reduced image which is originated from the characteristic of a lens. As the digital camera performs distortion correction on the reduced image, the number of arithmetic operations in distortion correction is reduced, making distortion correction simpler. The digital camera acquires a rectangle defined by the contour of the original, extracts the image of the original to acquire an original image before reduction, and acquires an associated projection-transformed image by affine transformation. The digital camera acquires pixel positions of the original image using an affine parameter, and acquires pixel positions of the image before distortion correction using a relational expression of distortion correction performed on the reduced image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.