Method and system for correcting projective distortions with elimination steps on multiple levels
US8811751B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2013 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Dec 20, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20164
- WIPO fieldComputer 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 the steps of image binarization, connected component analysis, horizontal vanishing point determination, vertical vanishing point determination and projective correction. The horizontal vanishing point is determined by estimating text baselines by means of position determining pixels of pixel blobs, identifying horizontal vanishing point candidates from the baselines, and determining a horizontal vanishing point from the candidates. The vertical vanishing point is determined on the basis of vertical features of the text portion. The method includes a first elimination step on the level of position determining pixels, a second elimination step on the level of text baselines and a third elimination step on the level of horizontal vanishing point candidates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.