Image processing apparatus for advantageously encoding blocks of data having either substantially the same or varied colors
US5588069A · kind A · utility
40Cited by
14References
25Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 2, 1995 |
| Grant date | Dec 24, 1996 |
| Priority date | — |
| Expiry date | Mar 2, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/64
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for efficiently encoding image data of a color facsimile or the like are provided. A specific color judgment unit discriminates a specific color portion such as white or blank portion of the image data inputted from an image input unit. An orthogonal transforming process is not executed to the blank block, thereby raising an encoding efficiency. A discrimination signal is subjected to a dynamic arithmetical encoding, thereby producing code data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.