Apparatus for picture processing
US4134134A · kind A · utility
33Cited by
2References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1977 |
| Grant date | Jan 9, 1979 |
| Priority date | — |
| Expiry date | Jun 8, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A Hadamard domain encoder wherein adding and subtracting operations on digitized intensities of 2 .times. 2 picture points yield secondary results. Likewise processing of groups of 2 .times. 2 secondary results yields further intermediate and/or final results. The complement of unprocessed secondary and final results fully characterizes the original picture but is better suited for data storage and/or transfer because the energy content of the picture is substantially restricted to a limited region. Redundancy in the stored/transmitted data is thus reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.