Fractal image compression device and method using perceptual distortion measurement
US5862263A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1996 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | Apr 9, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/001
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The fractal image compression device of the present invention contemplates a control unit for dividing a composite image into a plurality of range blocks and a plurality of domain blocks, classifying the range blocks and domain blocks into several classes according to their respective attributes, and controlling an overall operation of the device. A page memory stores image data received from an external source, and provides output of the image data via control of the control unit. A domain block memory receives first pixel data within the domain blocks from the page memory, and stores the first pixel data via control of the control unit. A range block memory receives second pixel data within the range blocks from the page memory, and stores the second pixel data via control of the control unit. A slope and offset detecting unit spacially-transforms the first pixel data within the domain blocks to correspond one-to-one with corresponding second pixel data within the range blocks, calculates slope and offset values of contractive compression functions corresponding to the spacially-transformed domain blocks and the range blocks, calculates background sensitivities and edge sensitivi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.