Image processing apparatus, image processing method, program, and storage medium
US7616837B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 2006 |
| Grant date | Nov 10, 2009 |
| Priority date | — |
| Expiry date | Jan 19, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/327
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A predetermined region set on a grayscale image is divided into rectangles each having a predetermined size (S706), and piled patterns which hold the accumulated values of pixel values at identical pixel positions upon piling up the divided rectangles is generated (S707). An alignment pattern is generated by calculating the logical sum of respective bit expression patterns (S708). A peak position which matches the alignment pattern on the piled patterns best is obtained (S710). The position of the predetermined region is corrected based on the peak position, and the predetermined region after correction is divided into rectangles each having the predetermined size (S711) Patterns in the divided rectangles are recognized (S712). Embedding information corresponding to each recognized pattern is specified (S713).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.