Method and apparatus for compressing images
US5892847A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1996 |
| Grant date | Apr 6, 1999 |
| Priority date | — |
| Expiry date | Apr 22, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method is disclosed that compresses and decompresses images. The compression system and method includes an encoder which compresses images and stores such compressed images in a unique file format, and a decoder which decompresses images. The encoder optimizes the encoding process to accommodate different image types with fuzzy logic methods that automatically analyze and decompose a source image, classify its components, select the optimal compression method for each component, and determine the optimal parameters of the selected compression methods. The encoding methods include: a Reed Spline Filter, a discrete cosine transform, a differential pulse code modulator, an enhancement analyzer, an adaptive vector quantizer and a channel encoder to generate a plurality of data segments that contain the compressed image. The plurality of data segments are layered in the compressed file to optimize the decoding process. The first layer allows the decoder to display the compressed image as a miniature or a coarse quality full sized image, the decoder then adds additional detail and sharpness to the displayed image as each new layer is received. The decoder uses optimal decomp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.