Automatic ruler detection
US10192137B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2015 |
| Grant date | Jan 29, 2019 |
| Priority date | — |
| Expiry date | May 22, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V2201/02
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In some implementations, a method includes: receiving, from the camera, a sample image that includes a fingerprint and a mensuration reference device, where the sample image is associated with a resolution; identifying (i) a plurality of edge candidate groups within the sample image, and (ii) a set of regularity characteristics associated with each of the plurality of edge candidate groups; determining that the associated set of regularity characteristics indicates the mensuration reference device; identifying a ruler candidate group, from each of the plurality of edge candidate groups, based at least on determining that the associated set of regularity characteristics indicates the mensuration reference device; computing a scale associated with the sample image based at least on extracting a set of ruler marks from the identified ruler candidate group; and generating, based at least on the scale associated with the sample image, a scaled image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.