Measurement of dimensions of solid objects from two-dimensional image(s)
US6995762B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2002 |
| Grant date | Feb 7, 2006 |
| Priority date | — |
| Expiry date | Jul 24, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/50
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention facilitates solid object reconstruction from a two-dimensional image. If an object is of known and regular shape, information about the object can be extracted from at least one view by utilizing appropriate constraints and measuring a distance between a camera and the object and/or by estimating a scale factor between a camera image and a real world image. The same device can perform both the image capture and the distance measurement or the scaling factor estimation. The following processes can be performed for object identification: parameter estimation; image enhancement; detection of line segments; aggregation of short line segments into segments; detection of proximity clusters of segments; estimation of a convex hull of at least one cluster; derivation of an object outline from the convex hull; combination of the object outline, shape constraints, and distance value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.