Method and system for correcting projective distortions using eigenpoints
US8913836B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2013 |
| Grant date | Dec 16, 2014 |
| Priority date | — |
| Expiry date | Dec 20, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/1478
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Method, system, device and computer program product for projective correction of an image containing at least one text portion that is distorted by perspective. The method includes a step of image binarization involving binarizing said image. The method includes connected component analysis. Pixel blobs are detected in said at least one text portion of said binarized image in connected component analysis. The method includes horizontal vanishing point determination, including estimating text baselines by means of eigenpoints of said pixel blobs and determining a horizontal vanishing point of said at least one text portion by means of said text baselines. The method also includes vertical vanishing point determination. A vertical vanishing point is determined for said at least one text portion on the basis of vertical features thereof. The method includes projective correction. Perspective in said image is corrected on the basis of said horizontal and vertical vanishing points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.