Method and device for the numerical coding of an image, more particularly a television image
US4752827A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1984 |
| Grant date | Jun 21, 1988 |
| Priority date | — |
| Expiry date | Aug 15, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and device for the numerical coding of an image, more particularly a television image, made up of pixels (elementary points) which are regularly distributed in the plane of the image, and to which one or more radiometric qualities denoted as components C.sub.i are allotted. In the image, windows (f) are determined which have a predetermined geometrical shape and comprise a certain number of pixels (p); for each window regroupings are carried out into classes (R1,R2 . . . ) of radiometries (spectral or spatial) of the ends of the vectors representing the pixels or combinations of pixels of the image in space of N dimensions, in accordance with a criterion of proximity; for each class (R1,R2 . . . ) from the individual values of the pixels forming the class, N typical radiometries are defined which will be stored or transmitted to be used in the reconstruction of the image; to define each pixel, a characteristic code of the class (R1,R2 . . . ) to which it belongs will also be stored or transmitted enabling the pixel to be given the corresponding typical radiometries for the reconstruction of the image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.