Abstract
Generally it is impossible to determine the size of an object from a single image due to the depth-scale ambiguity problem. However, with knowledge of the geometry of the scene and the existence of known reference dimensions in the image, it is possible to infer the real world dimensions of objects with only a single image. In this paper, we investigate different methods of automatically determining the dimensions of cuboids (rectangular boxes) from a single image, using a novel reference target. In particular, two approaches will be considered: the first will use the cross-ratio projective invariant and the other will use the planar homography. The accuracy of the measurements will be evaluated in the presence of noise in the feature points. The effects of lens distortions on the accuracy of the measurements will be investigated. Automatic feature detection techniques will also be considered.
| Original language | English |
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| Title of host publication | VISAPP 2007: Proceedings of the Second International Conference on Computer Vision Theory and Applications, Volume IU/MTSV |
| Editors | AK Ranchordas, H Araujo, J Vitria |
| Place of Publication | SETUBAL |
| Publisher | INSTICC-INST SYST TECHNOLOGIES INFORMATION CONTROL & COMMUNICATION |
| Pages | 85-90 |
| Number of pages | 6 |
| ISBN (Print) | 978-972-8865-74-0 |
| Publication status | Published - 2007 |
| Event | 2nd International Conference on Computer Graphics Theory and Applications - Barcelona Duration: 8 Mar 2007 → 11 Mar 2007 |
Conference
| Conference | 2nd International Conference on Computer Graphics Theory and Applications |
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| City | Barcelona |
| Period | 8/03/07 → 11/03/07 |
Keywords
- single view metrology
- 3D measurement
- feature detection
- planar homographys
- projective invariants