Image restoration method based on physical scattering model
US12373924B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2022 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Jan 17, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A90/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A new image formation model for descattering different from the previous works based on atmospheric scattering model is established. It can provide a corresponding physical explanation for each scattering environment, illustrate a relationship between a light source position and scattering conditions and solve the problem of scattering removal under non-uniform illumination. Firstly, a dark angle of a camera is removed by an integrating sphere; then, a pure scattering part is found by an improved dark channel-like prior method; and finally, a zenith angle, an azimuth angle, an extinction coefficient and other related physical quantities are calculated according to the light attenuation and backscattering distribution of a scattering medium to eliminate the backscattering and light attenuation. Theoretically, the model can be used in any uniform scattering medium, such as underwater and fog environments, and works well in high-density media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.