Image and video processing apparatuses and methods
US10951920B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2019 |
| Grant date | Mar 16, 2021 |
| Priority date | — |
| Expiry date | Aug 3, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The disclosure relates to an image processing apparatus for compressing or decompressing a segment of an image, the segment being non-rectangular and comprising a plurality of pixels, each pixel comprising a pixel value, the pixel values of the plurality of pixels forming a pixel value vector, the apparatus comprising: a processor configured to compress the segment or configured to decompress the segment, wherein compressing the segment comprises computing a plurality of expansion coefficients by expanding the pixel value vector into a plurality of basis vectors, wherein the basis vectors are discrete approximations of solutions of a boundary value problem of the Helmholtz equation on the segment of the image; and wherein decompressing the segment comprises computing the pixel value vector by forming a linear combination of the basis vectors according to the plurality of expansion coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.