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Showing 1 to 11 of 11 for “"Shape Descriptor"”.
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A high performance automatic face recognition system using 3D shape information
… a face feature extraction methods based on a 3D shape descriptor. Two different 3D shape descriptor Multi Contour Surface Angle Moments Descriptor(MCSAMD) and Multi Shell Surface Angle Moments Descriptor(MSSAMD) are designed and implemented. The nose tip is identified using a binary neural …
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Active geometric model : multi-compartment model-based segmentation & registration
… the same image domain. We also propose a novel shape descriptor, namely the Multi-Compartment Distance Functions or mcdf. Our proposed framework for segmentation is two-fold: first, several training samples distributed across various classes are registered onto a common frame of reference; then, …
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Three-dimensional shape characterization for particle aggregates using multiple projective representations
<p>Shape descriptors are used extensively in computer vision/automated recognition applications such as fingerprint matching, robotics, character recognition, etc. The conventional two-dimensional shape descriptors used in these applications do not readily lend themselves to compact representations …
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Multi-Dimensional Medial Geometry: Formulation, Computation, and Applications
Medial axis is a classical shape descriptor. It is a piece of geometry that lies in the middle of the original shape. Compared to the original shape representation, the medial axis is always one dimension lower and it carries many intrinsic shape properties explicitly. Therefore, it is widely used …
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Hairstyle modelling based on a single image.
… virtual hairstyle due to intrinsic hair shape. The fast development of related industrial applications demand an intuitive tool for efficiently creating realistic hairstyle for non-professional users. Recently, image-based hair modelling has been investigated for generating realistic …
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Detecting and Evaluating Therapy Induced Changes In Radiomics Features Measured From Non-Small Cell Lung Cancer to Predict Patient Outcomes
… or features at pre-treatment. However one shape descriptor measured at pre-treatment significantly improved model fit and performance for overall survival and distant metastases. Additionally for local-regional recurrence, the only significant covariate was texture strength measured at the …
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Forecasting Longitudinal Changes In Oropharyngeal Tumor Volume, Position, and Morphology During Image-Guided Radiation Therapy
… volume, one position, and two morphology (size, shape, and position) feature vectors were used to describe 35 oropharyngeal gross tumor volumes (GTVs) during radiation therapy. The two morphology feature vectors comprised the coordinates of the GTV centroids and one of two shape descriptors. One …
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Shape Analysis Using Spectral Geometry
<p>Shape analysis is a fundamental research topic in computer graphics and computer vision. To date, more and more 3D data is produced by those advanced acquisition capture devices, e.g., laser scanners, depth cameras, and CT/MRI scanners. The increasing data demands advanced analysis tools …
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Hand gesture recognition for multimedia applications
… tracker. Moment invariants are used as a shape descriptor. A new approach utilising the Zernike Velocity Moments (ZVMs, first introduced by Shutler and Nixon [1,2]), is examined on hand gestures. Results obtained using the ZVMs as spatial-temporal descriptor are compared to an HMM with …
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The development and demonstration of a practical methodology for fine particle shape characterisation in minerals processing
… models do not currently incorporate particle shape, which, although rarely quantified, is known to affect numerous unit operations. Automated Scanning Electron Microscopy (Auto-SEM-EDS) is a widely used tool for mineralogical analysis. It also provides an opportunity for simple, quantitative …
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From Bones to Bytes
… morphology, and landmark-free three-dimensional shape analysis. Using sheep and gazelle bones from modern and archaeological populations, it investigates sex-related variation, automated landmarking, and inter-species discrimination under conditions typical of archaeological material. The first …