Resolution conversion using dither processing
US9639790B2 · kind B2 · utility
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Key dates
| Filing date | Feb 27, 2015 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | Mar 15, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4055
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus includes a dither processing unit configured to perform dither processing on image data having a first resolution M by using a dither threshold value matrix and a resolution conversion unit configured to perform resolution conversion to convert the image data that is generated by the dither processing unit and which has the first resolution M into image data having a second resolution N lower than the first resolution M by using a filter, and the pixel of a growth center of the dither threshold value matrix and the center pixel of the processing using the filter coincide with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.