Method and apparatus for reconstructing three-dimensional objects
US5475422A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1994 |
| Grant date | Dec 12, 1995 |
| Priority date | — |
| Expiry date | Jun 20, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2013/0081
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
One of the images of an object captured by at least three cameras is defined as a basic image, and a basic backprojection line is defined which passes through a feature point in the basic image corresponding to a noted three-dimensional feature point on the object and the optical center of the camera that captured the basic image. Reference backprojection lines are defined with respect to respective feature points on an epipolar line, obtained by projecting the basic backprojection line onto the image by each of the other cameras, and the optical center of said each camera. The coordinates of intersection points of the basic backprojection line and the reference backprojection lines are calculated and the number of the reference backprojection lines intersecting at each intersection point on the basic backprojection line is counted. The point having the maximum number of intersections is determined to be the position of the noted three-dimensional feature point. Similar processing is performed for all of the feature points in the basic image, by which the positions of corresponding three-dimensional feature points of the object are determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.