Image processing apparatus and method
US5933249A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1997 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Oct 6, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/41
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
One object of the present invention is to cut out areas of different natures from an image hierarchically. For encoding, an area identifier identifies areas of an input image. A multivalued area is encoded in a multivalued encoding mode. As for a bicolor area, typical-color values are computed and then encoded in a binary encoding mode. For decoding, multivalued coded data is decoded in a multivalued decoding mode. As for binary-coded data, values of pixels of a binary image resulting from binary decoding are transformed into multivalued data using associated typical-color values. The multivalued data is structured according to structural information, wherein areas of the data may be superposed mutually. Thus, an image is reconstructed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.