Imaging system transfer function control method and apparatus
US5621519A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1995 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | Jul 31, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Accurately measuring and controlling the system transfer function of an imaging system, by eliminating interference from aliases. An image is captured of an image primitive with a uniaxial pattern, oriented at an angle to the primary axes of a sampling array. In order to accurately measure the system transfer function, a two-dimensional frequency representation is computed. The aliased components of the representation are separated from the unaliased components by translation in frequency along the axis perpendicular to the axis of the image primitive. Accurate measurement of the system transfer function makes it possible to accurately control the system transfer function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.