Optical reproducing system for multimedia information recorded with code data having function for correcting image reading distortion
US5825947A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Jul 12, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/06037
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image pickup unit optically reads, from an information recording medium having a portion that records multimedia information including at least one of audio information, video information, and digital code data in the form of an optically readable code pattern, the code pattern. A conversion unit converts the code pattern read by the image pickup unit into code data as an image. A block extraction unit extracts a block as a predetermined data unit from the code data by processing the code data converted by the conversion unit. A reference coordinate calculation unit calculates a reference coordinate position for determining the data reading coordinate position in the block by approximation using an Nth-degree curve passing the centers of a plurality of dots arranged at predetermined relative positions on the image upon extraction of the block as the predetermined unit of data from the code data by the block extraction unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.