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Animating an articulated 3D character requires the specification of its interior skeleton structure which defines how the skin surface is deformed during animation. Currently this task is to a large extent accomplished manually, which consumes a large amount of animators' time. This paper presents an automatic rigging method making use of a new geometry(More)
This paper systematically describes an interactive dissection approach for hybrid soft tissue models governed by extended position-based dynamics. Our framework makes use of a hybrid geometric model comprising both surface and volumet-ric meshes. The fine surface triangular mesh with high-precision geometric structure and texture at the detailed level is(More)
Prior research on metaballs-based modeling solely focuses on shape geometry and its processing for organic objects. This paper takes a different approach by exploring a new metaballs-based physical modeling method for digital organs that are imperative to support virtual surgery. We propose a novel hybrid physical model comprising both surface mesh and the(More)
As a general approach to study interactions among small biological molecules such as genes and proteins, network analysis has aroused great interest of people from various research disciplines. However, the construction of network is usually quite sensitive to noise which is unavoidable in real data. Besides, the parameter selections for network(More)
This paper presents a novel craniofacial visualization technique with the developments from both computer vision and graphics. It is a low radiation, low cost alternative to CT-based system for the reconstruction of 3D cranium using only three X-rays. We paste lead markers on the subject's face which allow a 3D face model to be constructed by correlated(More)
This paper outlines a framework of modelling slender rod-like structure of biological tissues in both global and local scales. Volumetric discretization of a rod-like structure is expensive in computation and therefore is not ideal for applications where real-time performance is essential. In our approach, the Cosserat rod model is introduced to capture the(More)
With the development of computer graphic and haptic devices, training surgeons with virtual reality technology has proven to be very effective in surgery simulation. Many successful simulators have been deployed for training medical students. However, due to the various unsolved technical issues, the laparoscopic surgery simulation has not been widely used.(More)
This paper describes an interactive dissection approach based on metaballs for digital organs in virtual surgery. For organ's geometry, we employ a novel hybrid model comprising both inner metaballs and high-resolution surface mesh with texture. Using metaballs, the organ interior is geometrically simplified via a set of overlapping spheres with different(More)
This paper systematically describes a real-time dissection approach for digital organs by strong coupling of geometric metaballs and physically correct mesh-free method. For organ geometry, we employ a novel hybrid model comprising both inner metaballs and high-resolution surface mesh with texture information. Through the use of metaballs, the organ(More)