Systems and methods for larval fish enumeration and growth monitoring
US10426143B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2018 |
| Grant date | Oct 1, 2019 |
| Priority date | — |
| Expiry date | May 24, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30242
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for object enumeration in a culture tank. The methods comprise: obtaining an array of two dimensional images of an illuminated scene in a culture tank; correcting non-uniform background illumination in the two dimensional images; improving a color contrast between a background and object edges shown in the two dimensional images; performing a defocus analysis using the two dimensional images to generate a focus map image; generating a modified focus map image by eliminating isolated spots shown in the focus map image and merging relatively small spots with adjacent relatively large objects in the focus map image; classifying each object shown in the modified focus map image as an object of interest or an object of no interest; and counting the number of objects classified as objects of interest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.