Image reduction method
US4712140A · kind A · utility
34Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1986 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Mar 17, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/3935
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A binary image is reduced in size by a method including the steps of: storing the image in bit sequence; dividing the image into transposable blocks; transposing by look up table, for each block having any nonzero data, each group of 6 bits along a first axis to a group of 5 bits; transposing by look up table, for each block having any nonzero data, each group of 6 bits along a second axis to a group of 5 bits; storing said transposed blocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.