3D shape descriptors for face segmentation and fiducial points detection: an anatomical-based analysis

Augusto E. Salazar; Alexander Cerón; Flavio A. Prieto

doi:10.1117/12.871374

27 January 2011 3D shape descriptors for face segmentation and fiducial points detection: an anatomical-based analysis

Augusto E. Salazar, Alexander Cerón, Flavio A. Prieto

Proceedings Volume 7864, Three-Dimensional Imaging, Interaction, and Measurement; 78640M (2011) https://doi.org/10.1117/12.871374
Event: IS&T/SPIE Electronic Imaging, 2011, San Francisco Airport, California, United States

Abstract

The behavior of nine 3D shape descriptors which were computed on the surface of 3D face models, is studied. The set of descriptors includes six curvature-based ones, SPIN images, Folded SPIN Images, and Finger prints. Instead of defining clusters of vertices based on the value of a given primitive surface feature, a face template composed by 28 anatomical regions, is used to segment the models and to extract the location of different landmarks and fiducial points. Vertices are grouped by: region, region boundaries, and subsampled versions of them. The aim of this study is to analyze the discriminant capacity of each descriptor to characterize regions and to identify key points on the facial surface. The experiment includes testing with data from neutral faces and faces showing expressions. Also, in order to see the usefulness of the bending-invariant canonical form (BICF) to handle variations due to facial expressions, the descriptors are computed directly from the surface and also from its BICF. In the results: the values, distributions, and relevance indexes of each set of vertices, were analyzed.

Citation Download Citation

Augusto E. Salazar, Alexander Cerón, and Flavio A. Prieto "3D shape descriptors for face segmentation and fiducial points detection: an anatomical-based analysis", Proc. SPIE 7864, Three-Dimensional Imaging, Interaction, and Measurement, 78640M (27 January 2011); https://doi.org/10.1117/12.871374

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KEYWORDS

3D modeling

Shape analysis

Mouth

Databases

Nose

Image segmentation

Dubnium

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