Image processing
US4922544A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1987 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | Sep 10, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/649
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for processing original data defining the values of pixels of an original colored image represented in a spatial domain by two or more color separations each color separation defining the respective color component content of pixels arranged in a two dimensional array extending in X and Y directions. The apparatus comprises a store 6 for storing the original data; and a frequency transform circuit 8 for performing a three dimensional transformation on the store representation to generate transformed data representing the original image in three dimensional frequency space. Two of the three dimensions represent the variation in pixel value in the X direction and the Y direction respectively and the transformed data has a single zero order frequency term.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.