Cubic convolution interpolating apparatus and method thereof
US7072528B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2001 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Sep 14, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/4007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A cubic convolution interpolating apparatus and method for performing interpolation by optimizing a parameter which determines the interpolation coefficients according to the local property of an image signal, which can minimize the quantity of information loss in a scaled or resampled image signal. The cubic convolution interpolating apparatus includes an image signal divider dividing an image signal into a plurality of subblocks, and a block generating parameters which determine cubic convolution interpolation coefficients in units of subblocks, and perform cubic convolution interpolation. The cubic convolution interpolating block includes a forward scaling processor sampling a cubic convolution interpolated continuous function of original image data transmitted from the divider using a first scaling factor and scaling the original image data, a backward scaling processor sampling a backward cubic convolution interpolated continuous function of the scaled data output from the forward scaling processor using a second scaling factor and restoring the scaled data into the original image data, and a parameter optimizer optimizing the parameter using the original image data and the da…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.