Results 221 to 230 of about 101,244 (263)
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2014
Fractal phenomena are a source of geometric detail that can be difficult to harness for general purpose shape modeling. We present a method for modeling surfaces by warping a fractal onto a given mesh. The warp is specified by the user as a coarse displacement field and interpolated by triharmonic radial basis functions. Efficient methods for rendering
Tim McGraw, Donald Herring
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Fractal phenomena are a source of geometric detail that can be difficult to harness for general purpose shape modeling. We present a method for modeling surfaces by warping a fractal onto a given mesh. The warp is specified by the user as a coarse displacement field and interpolated by triharmonic radial basis functions. Efficient methods for rendering
Tim McGraw, Donald Herring
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SPIE Proceedings, 2006
Active shape models (ASM) are widely employed for recognizing anatomic structures and for delineating them in medical images. In this paper, a novel strategy called oriented active shape models (OASM) is presented in an attempt to overcome the following five limitations of ASM: 1) lower delineation accuracy, 2) the requirement of a large number of ...
Jiamin Liu, Jayaram K. Udupa
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Active shape models (ASM) are widely employed for recognizing anatomic structures and for delineating them in medical images. In this paper, a novel strategy called oriented active shape models (OASM) is presented in an attempt to overcome the following five limitations of ASM: 1) lower delineation accuracy, 2) the requirement of a large number of ...
Jiamin Liu, Jayaram K. Udupa
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Regularized active shape model for shape alignment
2008 8th IEEE International Conference on Automatic Face & Gesture Recognition, 2008Active shape model (ASM) statistically represents a shape by a set of well-defined landmark points and models object variations using principal component analysis (PCA). However, the extracted shape contour modeled by PCA is still unsmooth when the shape has a large variation compared with the mean shape.
Ran He 0001 +3 more
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International Journal of Shape Modeling, 1999
Typically one models the shapes of objects in ordinary 3-dimensional space. The objects are the focus of interest, while the ambient space serves only as a background. But one can reverse the emphasis, and focus instead on the "shape" of the space itself.
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Typically one models the shapes of objects in ordinary 3-dimensional space. The objects are the focus of interest, while the ambient space serves only as a background. But one can reverse the emphasis, and focus instead on the "shape" of the space itself.
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SHAPE MODELING AND ANALYSIS OF TERRAIN
International Journal of Shape Modeling, 1994Summary: The construction of high-fidelity digital terrain models (DTM) requires the development of adaptive techniques for modeling and analysis of terrain surfaces. The paper presents a conceptual framework for digital terrain modeling which includes all relevant tasks to achieve this goal.
Martin Brändli, Bernhard Schneider
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Dynamic Shape and Appearance Models
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2006We propose a model of the joint variation of shape and appearance of portions of an image sequence. The model is conditionally linear, and can be thought of as an extension of active appearance models to exploit the temporal correlation of adjacent image frames.
Gianfranco Doretto, Stefano Soatto
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Computer, 1977
The life cycle of a mechanical component from its first conceptualization to its final packaging involves many intermediate processes such as product definition, engineering analysis, manufacturing planning, material procurement, and production control.
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The life cycle of a mechanical component from its first conceptualization to its final packaging involves many intermediate processes such as product definition, engineering analysis, manufacturing planning, material procurement, and production control.
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Multi-resolution Statistical Shape Models for Multi-organ Shape Modelling
2020Statistical shape models (SSMs) are widely used in medical image segmentation. However, traditional SSM methods suffer from the High-Dimension-Low-Sample-Size (HDLSS) problem in modelling. In this work, we extend the state-of-the-art multi-resolution SSM approach from two dimension (2D) to three dimension (3D) and from single organ to multiple organs ...
Zhonghua Chen +3 more
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A generalized shape-axis model for planar shapes
Proceedings 15th International Conference on Pattern Recognition. ICPR-2000, 2002We describe a generalized shape-axis (SA) model for representing both open and closed planar curves. The SA model is an effective way to represent shapes by comparing their self-similarities. Given a 2D shape, whether it is closed or open, we use two different parametrizations for the curve.
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Vertebral Shape: Automatic Measurement with Active Shape Models
Radiology, 1999The shape and appearance of the spine on lateral dual x-ray absorptiometry scans were statistically modeled. To measure vertebral shape accurately, rapidly, and automatically with a computer, this trained model was matched to findings on previously unseen scans.
Smyth, Paul P. +2 more
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