Image scaling by exact 2D implicit polynomials
US6697539B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2000 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Mar 31, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/4007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system modifies an image consisting of a plurality of pixels from a first scale to a second scale. The system determines an integer matrix that is independent of the values of the plurality of pixels of the image. The system also determines a first vector for a region of the first scale representative of a surface based on the coordinates of the first scale. Also, the system interpolates pixel locations in the second scale by scaling the coordinates of points of the first scale and computing a scaled second vector. A third vector is determined based, at least in part, upon the product of the first vector and the second vector, where the third vector has uneven scaling of its terms. A plurality of the terms of the third vector based upon a fractional scaling factor related to said uneven scaling and summing the components of the third vector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.