Apparatus and method for acquiring and evaluating an image from a predetermined extract of a printed product
US7501647B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2005 |
| Grant date | Mar 10, 2009 |
| Priority date | — |
| Expiry date | Feb 18, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/02493
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for acquiring and evaluating an image of a predetermined extract of a printed product removes the effects of scattered light to improve the accuracy of image evaluation. The apparatus uses a camera that has an electronic image sensor with a two-dimensional arrangement of sensor elements. An aperture stop is arranged in the beam path of the camera for shadowing a predetermined part of the image sensor. When an acquired image is read from a part of the image sensor that is not shadowed, corresponding readings from the shadowed portion of the sensor are subtracted from the acquired image to obtain intensity signals corrected for scattered light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.