Shape analysis (program analysis)
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Size, shape, and form: concepts of allometry in geometric morphometrics Open
Allometry refers to the size-related changes of morphological traits and remains an essential concept for the study of evolution and development. This review is the first systematic comparison of allometric methods in the context of geomet…
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Mindboggling morphometry of human brains Open
Mindboggle (http://mindboggle.info) is an open source brain morphometry platform that takes in preprocessed T1-weighted MRI data and outputs volume, surface, and tabular data containing label, feature, and shape information for further ana…
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MeshNet: Mesh Neural Network for 3D Shape Representation Open
Mesh is an important and powerful type of data for 3D shapes and widely studied in the field of computer vision and computer graphics. Regarding the task of 3D shape representation, there have been extensive research efforts concentrating …
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3D Skeletons: A State‐of‐the‐Art Report Open
Given a shape, a skeleton is a thin centered structure which jointly describes the topology and the geometry of the shape. Skeletons provide an alternative to classical boundary or volumetric representations, which is especially effective …
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Gaussian Process Morphable Models Open
Models of shape variations have become a central component for the automated analysis of images. An important class of shape models are point distribution models (PDMs). These models represent a class of shapes as a normal distribution of …
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Learning Local Shape Descriptors from Part Correspondences with Multiview Convolutional Networks Open
We present a new local descriptor for 3D shapes, directly applicable to a wide range of shape analysis problems such as point correspondences, semantic segmentation, affordance prediction, and shape-to-scan matching. The descriptor is prod…
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3DPeople: modeling the geometry of dressed humans Open
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Updated Methods for Seed Shape Analysis Open
Morphological variation in seed characters includes differences in seed size and shape. Seed shape is an important trait in plant identification and classification. In addition it has agronomic importance because it reflects genetic, physi…
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3D analytical mathematical models of random star-shape particles via a combination of X-ray computed microtomography and spherical harmonic analysis Open
To compute any physical quantity for a random particle, one needs to know the mathematical shape of the particle. For regular particles like spheres and ellipsoids, the mathematics are straightforward. For random particles, with realistic …
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High-Density Morphometric Analysis of Shape and Integration: The Good, the Bad, and the Not-Really-a-Problem Open
The field of comparative morphology has entered a new phase with the rapid generation of high-resolution three-dimensional (3D) data. With freely available 3D data of thousands of species, methods for quantifying morphology that harness th…
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A statistical shape modelling framework to extract 3D shape biomarkers from medical imaging data: assessing arch morphology of repaired coarctation of the aorta Open
The suggested method has the potential to discover previously unknown 3D shape biomarkers from medical imaging data. Thus, it could contribute to improving diagnosis and risk stratification in complex cardiac disease.
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Efficient PDE Constrained Shape Optimization Based on Steklov--Poincaré-Type Metrics Open
Recent progress in PDE constrained optimization on shape manifolds is based\non the Hadamard form of shape derivatives, i.e., in the form of integrals at\nthe boundary of the shape under investigation, as well as on intrinsic shape\nmetric…
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Shape Characteristics of Coral Sand from the South China Sea Open
The particle shape of coral sand is a crucial factor that affects its accumulation characteristics. Two-dimensional particle images of coral sand with different particle sizes were obtained through optical imaging, and the basic size param…
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AGMT3-D: A software for 3-D landmarks-based geometric morphometric shape analysis of archaeological artifacts Open
We present here a newly developed software package named Artifact GeoMorph Toolbox 3-D (AGMT3-D). It is intended to provide archaeologists with a simple and easy-to-use tool for performing 3-D landmarks-based geometric morphometric shape a…
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PaCeQuant: A Tool for High-Throughput Quantification of Pavement Cell Shape Characteristics Open
Pavement cells (PCs) are the most frequently occurring cell type in the leaf epidermis and play important roles in leaf growth and function. In many plant species, PCs form highly complex jigsaw-puzzle-shaped cells with interlocking lobes.…
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Multiscale quantification of morphodynamics: MorphoLeaf, software for 2-D shape analysis Open
A major challenge in morphometrics is to analyse complex biological shapes formed by structures at different scales. Leaves exemplify this challenge as they combine differences in their overall shape with smaller shape variations at their …
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Topological Data Analysis as a Morphometric Method: Using Persistent Homology to Demarcate a Leaf Morphospace Open
Current morphometric methods that comprehensively measure shape cannot compare the disparate leaf shapes found in seed plants and are sensitive to processing artifacts. We explore the use of persistent homology, a topological method applie…
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Evaluation of methods for generative modeling of cell and nuclear shape Open
Motivation Cell shape provides both geometry for, and a reflection of, cell function. Numerous methods for describing and modeling cell shape have been described, but previous evaluation of these methods in terms of the accuracy of generat…
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Flexibility Coexists with Shape-Persistence in Cyanostar Macrocycles Open
Shape-persistent macrocycles are attractive functional targets for synthesis, molecular recognition, and hierarchical self-assembly. Such macrocycles are noncollapsible and geometrically well-defined, and they are traditionally characteriz…
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StructureNet: Hierarchical Graph Networks for 3D Shape Generation Open
The ability to generate novel, diverse, and realistic 3D shapes along with associated part semantics and structure is central to many applications requiring high-quality 3D assets or large volumes of realistic training data. A key challeng…
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A potential pitfall in studies of biological shape: Does size matter? Open
The number of published studies using geometric morphometrics ( GM ) for analysing biological shape has increased steadily since the beginning of the 1990s, covering multiple research areas such as ecology, evolution, development, taxonomy…
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Angular Triplet-Center Loss for Multi-View 3D Shape Retrieval Open
How to obtain the desirable representation of a 3D shape, which is discriminative across categories and polymerized within classes, is a significant challenge in 3D shape retrieval. Most existing 3D shape retrieval methods focus on capturi…
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Morphometrics of complex cell shapes: lobe contribution elliptic Fourier analysis (LOCO-EFA) Open
Quantifying cell morphology is fundamental to the statistical study of cell populations, and can help unravel mechanisms underlying cell and tissue morphogenesis. Current methods, however, require extensive human intervention, are highly p…
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Learning Part Generation and Assembly for Structure-Aware Shape Synthesis Open
Learning powerful deep generative models for 3D shape synthesis is largely hindered by the difficulty in ensuring plausibility encompassing correct topology and reasonable geometry. Indeed, learning the distribution of plausible 3D shapes …
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BMI and WHR Are Reflected in Female Facial Shape and Texture: A Geometric Morphometric Image Analysis Open
Facial markers of body composition are frequently studied in evolutionary psychology and are important in computational and forensic face recognition. We assessed the association of body mass index (BMI) and waist-to-hip ratio (WHR) with f…
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Visual shape perception as Bayesian inference of 3D object-centered shape representations. Open
Despite decades of research, little is known about how people visually perceive object shape. We hypothesize that a promising approach to shape perception is provided by a "visual perception as Bayesian inference" framework which augments …
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Learning to Infer and Execute 3D Shape Programs Open
Human perception of 3D shapes goes beyond reconstructing them as a set of points or a composition of geometric primitives: we also effortlessly understand higher-level shape structure such as the repetition and reflective symmetry of objec…
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Numerical Inversion of SRNF Maps for Elastic Shape Analysis of Genus-Zero Surfaces Open
Recent developments in elastic shape analysis (ESA) are motivated by the fact that it provides a comprehensive framework for simultaneous registration, deformation, and comparison of shapes. These methods achieve computational efficiency u…
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SHape Analyser for Particle Engineering (SHAPE): Seamless characterisation and simplification of particle morphology from imaging data Open
The mechanical and rheological behaviour of particulate and granular assemblies is significantly influenced by the shape of their individual particles. We present a code that implements shape characterisation of three-dimensional particles…
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Representativity of 2D Shape Parameters for Mineral Particles in Quantitative Petrography Open
This paper introduces an assessment of the representation of shape parameter measurements on theoretical particles. The aim of the study was to establish a numerical method for estimating sphericity, roundness, and roughness on artificiall…