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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Haker, M. Bohme, M. Martinetz, T. Barth, E. |
| Copyright Year | 2007 |
| Description | Author affiliation: Univ. of Lubeck, Lubeck (Haker, M.; Bohme, M.; Martinetz, T.; Barth, E.) |
| Abstract | This paper presents a very simple feature-based nose detector in combined range and amplitude data obtained by a 3D time-of-flight camera. The robust localization of image attributes, such as the nose, can be used for accurate object tracking. We use geometric features that are related to the intrinsic dimensionality of surfaces. To find a nose in the image, the features are computed per pixel; pixels whose feature values lie inside a certain bounding box in feature space are classified as nose pixels, and all other pixels are classified as non-nose pixels. The extent of the bounding box is learned on a labeled training set. Despite its simplicity this procedure generalizes well, that is, a bounding box determined for one group of subjects accurately detects noses of other subjects. The performance of the detector is demonstrated by robustly identifying the nose of a person in a wide range of head orientations. An important result is that the combination of both range and amplitude data dramatically improves the accuracy in comparison to the use of a single type of data. This is reflected in the equal error rates (EER) obtained on a database of head poses. Using only the range data, we detect noses with an EER of 0.66. Results on the amplitude data are slightly better with an EER of 0.42. The combination of both types of data yields a substantially improved EER of 0.03. |
| Starting Page | 1 |
| Ending Page | 4 |
| File Size | 2426612 |
| Page Count | 4 |
| File Format | |
| ISBN | 1424409683 |
| DOI | 10.1109/ISSCS.2007.4292663 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-07-13 |
| Publisher Place | Romania |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Computer vision Head Error analysis Databases Nose Detectors Cameras Robustness Facial features Pixel |
| Content Type | Text |
| Resource Type | Article |
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