Method and apparatus for detecting banding using moire pattern
US8085441B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Jul 7, 2004 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Oct 15, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/00045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of determining presence of variations in interline spacing in a first image comprising a first plurality of parallel lines of pixels comprising: providing a second image comprising a second plurality of parallel lines; orienting the images so that the lines in the first and second pluralities are superimposed and angled with respect to each other to generate an interference image comprising a Moiré interference pattern; and using the Moiré interference pattern to determine presence of said variations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.