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Statistical shape and appearance models of bones
Bone, 2014When applied to bones, statistical shape models (SSM) and statistical appearance models (SAM) respectively describe the mean shape and mean density distribution of bones within a certain population as well as the main modes of variations of shape and density distribution from their mean values.
Harrie Weinans, Amir Abbas Zadpoor
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Building optimal 2D statistical shape models
Image and Vision Computing, 2003Statistical shape models are used widely as a basis for segmenting and interpreting images. A major drawback of the approach is the need, during training, to establish a dense correspondence across a training set of segmented shapes. We show that model construction can be treated as an optimisation problem, automating the process and guaranteeing the ...
Chris Taylor +2 more
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Evaluation of the Midface by Statistical Shape Modeling
Journal of Oral and Maxillofacial Surgery, 2021The aim of this investigation was to generate a statistical shape model (SSM) of the midface and evaluate symmetry, gender aspects, and bone thickness.About 102 computed tomography scans were analyzed to create the SSM. This included segmentation, landmark attribution, and Procrustes and principal component analysis.
Thomas, Hierl +3 more
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Statistical Shape and Appearance Models in Osteoporosis
Current Osteoporosis Reports, 2014Statistical models (SMs) of shape (SSM) and appearance (SAM) have been acquiring popularity in medical image analysis since they were introduced in the early 1990s. They have been primarily used for segmentation, but they are also a powerful tool for 3D reconstruction and classification. All these tasks may be required in the osteoporosis domain, where
Castro-Mateos, Isaac +5 more
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Evaluation of a Statistical Shape Model for the Liver
2018 International Conference on Image and Vision Computing New Zealand (IVCNZ), 2018A statistical shape model (SSM)for the liver has been proposed recently which is based on a cubic Hermite mesh with a small number of elements. By fitting to the data cloud of a liver surface, such a mesh is capable of capturing the complex liver shape with fine details.
Zhihui Lu 0004 +2 more
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Statistical shape models of plant leaves
2013 IEEE International Conference on Image Processing, 2013The shapes of plant leaves are of great importance to plant biologists and botanists, as they can help in distinguishing plant species, measuring their health, analyzing their growth patterns, and understanding relations between various species. We propose a statistical model that uses the Squared Root Velocity Function representation and a Riemannian ...
Hamid Laga +3 more
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Measurement error in statistical models of shape
Computer Methods and Programs in Biomedicine, 2011Active shape models (ASMs) are popular and sophisticated methods of extracting features in (especially medical) images. Here we analyse the error in placing ASM points on the boundary of the feature. By using replications, a corrected covariance matrix is presented that should reduce the effects of placement error.
Damian J. J. Farnell +2 more
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Reparameterising 3D Statistical Shape Models
2019 14th IEEE International Conference on Automatic Face & Gesture Recognition (FG 2019), 20193D statistical shape models are widely used in modelling 3D shapes such as human faces and bodies. The limitation of such model is that, once built, the model can only represent 3D shape instances of a fixed mesh topology. While some applications may require a shape model of a different mesh topology, the model building pipeline has to be repeated with
Haoyang Wang 0002, Stefanos Zafeiriou
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Building a statistical shape model of the pelvis
International Congress Series, 2004Abstract Statistical shape models of anatomical structures such as bones can simplify and improve 3D segmentation and the registration to sparse and noisy input data. In this paper, a novel surface-based technique to generate statistical shape models from segmented CT data sets is presented.
Sebastian Meller, Willi A. Kalender
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