Image processing using content-based weighted dithering
US9906686B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Oct 15, 2013 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Oct 15, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/1881
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Image processing transforms input multi-level image data into output image data having a smaller number of levels (the input and output image data represents images formed of cells). The image processing distributes quantization error of a target cell of the image to neighbor cells in proportions determined by a set of weights. The distribution excludes neighbor cells whose data level is less than a threshold value from receiving distributed quantization error, or allows just a fraction of the quantization error to be distributed to such neighbor cells.
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