Image processing method and apparatus for extracting a portion of image data
US5222159A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1991 |
| Grant date | Jun 22, 1993 |
| Priority date | — |
| Expiry date | Jun 19, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T11/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image processing method and apparatus for extracting a part of original image data. The mask data to extract a part of original image data is provided as a unit larger than the pixel unit of the original image data. The mask data at the objective position is corrected by use of the mask data at a plurality of positions. A part of the original image data is extracted on the basis of the corrected mask data. The mask data is stored in a memory and corrected on a pixel unit basis of the original image data. Since the mask boundary data is stored into the mask memory, the image converting processes such as enlargement, reduction, rotation, etc. can be performed by use of the mask memory of a small capacity without limiting the mask shape. With this apparatus, the mask image data having the smooth edge portion can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.