System and method for digital document alignment
US7145699B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 2002 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Apr 5, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30176
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method are provided for aligning a scanned document in a digital scanner. The method comprises: scanning a document to create a matrix of pixel information; averaging pixel intensity information into a first plurality of row-mean buffer elements, where each row strip includes information from a second plurality of column elements; and, averaging pixel information into a third plurality of column-mean buffer elements, where each column strip includes information from a fourth plurality of row elements; comparing adjacent elements of matrix row information to generate a first set of edge positions; comparing adjacent elements of matrix column information to generate a second set of edge positions; generating a rotation angle in response to analyzing the first and second edge positions; and, rotating the scanned document by the rotation angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.