Processing method for the rotation of an image
US4618991A · kind A · utility
34Cited by
2References
8Claims
0Family size
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Key dates
| Filing date | May 23, 1984 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | May 23, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/608
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A signal rotation processing method for transforming an original image expressed on two-dimensional orthogonal coordinates into an image rotated by an arbitrary angle of .theta. radians. In order to raise the transforming speed, the method includes a skew coordinate transformation step of multiplying the original coordinates of the image elements by a matrix of ##EQU1## and an enlarging/reducing transformation step of conducting multiplication by a matrix of ##EQU2## .
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.