Method and apparatus for generating a halftoned image from a compressed image
US8005305B2 · kind B2 · utility
0Cited by
5References
17Claims
0Family size
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Key dates
| Filing date | Jun 15, 2004 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Jun 11, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/41
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for generating a halftoned image from an image compressed by a domain transformation yielding coefficients for resulting domain components and by a coding operation by which these coefficients are coded. The method includes performing a decoding operation by which decoded coefficients (yp) are obtained and performing a thresholding operation by which a bitmap is obtained, wherein only certain decoded coefficients (yp) verifying a selection criterion are selected and taken into account in the thresholding operation.
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