Image movement processing for page planning
US4924388A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1988 |
| Grant date | May 8, 1990 |
| Priority date | — |
| Expiry date | Jan 5, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Apparatus for modifying part of an image represented digitally in the frequency domain comprises a first memory for storing a representation of the image digitally in the frequency domain as at least one first block of data locations containing frequency coefficient data. A second memory is provided for storing a representation of the image part in the frequency domain by second blocks of data locations containing frequency coefficient data, the first and second blocks representing, after conversion to the spatial domain, spatially shifted versions of the image part relative to a fixed spatial co-ordinate system. A suitably programmed computer applies a predetermined shift function defined in the frequency domain to the (or each) first block of data stored in the first memory to generate the (or each) second block, and stores the resultant second blocks of data in the second memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.