Image processing method and apparatus for normalisation and artefact correction
US10573002B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2016 |
| Grant date | Feb 25, 2020 |
| Priority date | — |
| Expiry date | Sep 23, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30024
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A computer implemented image processing for normalizing images is disclosed. The method comprises calculating, for each chunk of an image, a combination of the two largest contributions to the variations of color of the chunk that approximates a representation of three additive color component data elements of the each image chunk, thereby to provide a plurality of approximated image chunks. The approximated image chunks are used to determine (i) a first item of approximated image chunk data, vMin, that corresponds to a first one of the two largest contributions, and (ii) a second item of the approximated image chunk data, vMax, that corresponds to a second one of the two largest contributions, wherein the first item of approximated image chunk data and the second item of approximated image chunk data together provide a mapping transformation and for each image pixel, image pixel data is obtained comprising three additive color component data elements of the each image pixel, and transformed using the mapping transformation to calculate normalized image pixel data for the each image pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.