Methods and apparatus for generating a projection of an image
US6381375B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1998 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Apr 6, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Novel methods for generating a projection of an image according to the invention concurrently rotate, scale, translate, skew, shear, or otherwise transform the image via a sequence of two one-dimensional transformations. A first intermediate image is generated via affine transformation of the source along a first axis. The intermediate image is then subjected to affine transformation along a second axis, e.g., perpendicular to the first. A projection of the resultant image is generated along a selected one of the first or second axes by summing pixel intensities in corresponding rows (or columns) or by summing counts of pixels whose intensities are above or below a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.