Denoising and/or zooming of inspection images
US10713759B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2016 |
| Grant date | Jul 14, 2020 |
| Priority date | — |
| Expiry date | Jan 11, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2223/401
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one aspect, there is provided a method of denoising one or more inspection images comprising a plurality of pixels, comprising: receiving an inspection image generated by an inspection system configured to inspect one or more containers, the inspection image being corrupted by a Poisson-Gaussian noise and a variance of the noise being non-constant in the plurality of pixels, and denoising the received inspection image by applying, to the inspection image, a variance-stabilizing transformation for transforming the variance of the noise into a constant variance in the plurality of pixels, wherein the variance-stabilizing transformation is based on a descriptor associated with the angular divergence of the inspection radiation and the Poisson-Gaussian noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.