Method for producing a compressed digital representation of a visible image
US3991267A · kind A · utility
12Cited by
2References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1975 |
| Grant date | Nov 9, 1976 |
| Priority date | — |
| Expiry date | Oct 23, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/417
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Lines on an image are optically scanned in sequence for image density at spaced intervals. Binary line scan functions are produced to represent the densities of the samples. These functions are translated into equivalent binary line codes of substantially reduced redundancy and length. Translation is accomplished by generating codes defining the variations of each line scan function from that of the previous line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.