Image encoding device and method therefor, image decoding apparatus and method therefor, and computer-readable recorded medium on which image encoding program and image decoding program are recorded
US7031531B1 · kind B1 · utility
3Cited by
6References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2000 |
| Grant date | Apr 18, 2006 |
| Priority date | — |
| Expiry date | Sep 20, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/413
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image coding apparatus corresponding to a standard scheme of binary image compression and having the compression efficiency of a gray scale image improved includes: a bit plane generator (303) dividing unitary image data into a plurality of bit planes determined according to the number of bits forming each pixel, an image preprocessor (305) connected to the bit plane generator (303) to arrange bit data of the same position forming a plurality of bit planes in close proximity to combine into a single bit plane, and a data compressor (306) connected to the image preprocessor (305) to compress an image of the single bit plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.