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Shape Tuning in Fully Free-Form Deformation Features
Journal of Computing and Information Science in Engineering, 2005In this paper, an approach for shape tuning and predictable surface deformation is proposed. It pertains to the development of Fully Free Form Deformation Features (δ‐F4) which have been proposed to avoid low-level manipulations of free form surfaces. In our approach, δ‐F4 are applied through the specification of higher level parameters and constraints
Pernot JP +4 more
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GFFD: Generalized free-form deformation with scalar fields
Journal of Zhejiang University SCIENCE, 2003The novel free-form deformation(FFD) technique presented in the paper uses scalar fields defined by skeletons with arbitrary topology. The technique embeds objects into the scalar field by assigning a field value to each point of the objects. When the space of the skeleton is changed, the distribution of the scalar field changes accordingly, which ...
Xu-Jia, Qin +4 more
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Hybrid deformable image registration using a closed-form Free Form Deformation approach
International Journal of Biomedical Engineering and Technology, 2012This paper describes an efficient non-rigid image registration method using a B-spline based Free Form Deformation (FFD) model. The proposed method is very efficient, in that it utilises sparse feature correspondences to estimate an elastic deformation field in a closed form.
Xiaolei Huang, Hongsheng Li, Yaoyao Zhu
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Direct manipulation of RDMS free form deformation
2009 11th IEEE International Conference on Computer-Aided Design and Computer Graphics, 2009In this paper, we investigate the direct manipulation problem of free form deformation with rational DMS spline volume (RDMS-FFD). For the weights based direct manipulation method, the solution of the weights can be achieved by solving a linear system; for the control points based method, the explicit solution of displacements of the control points can
Gang Xu +3 more
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Free-form deformation with weighted T-spline
The Visual Computer, 2005A new method of free-form deformation, w-TFFD, is proposed, for which an original shape is deformed using weighted T-spline volumes. We generalize T-splines to weighted T-spline volumes that also permit T-junctions. Weighted T-spline volumes are a natural generalization of NURBS volumes but permit more flexible control lattices. Thus, w-TFFD holds many
Wenhao Song, Xunnian Yang
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Free-Form Tetrahedron Deformation
2015Deformation mechanics in combination with artistic control allows the creation of remarkably fluid and life-like 3-dimensional models. Slightly deforming and distorting a graphical mesh injects vibrant harmonious characteristics that would otherwise be lacking. Having said that, the deformation of high poly complex shapes is a challenging and important
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Inverse-Consistent Symmetric Free Form Deformation
2012Bias in image registration has to be accounted for when performing morphometric studies. The presence of bias can lead to unrealistic power estimates and can have an adverse effect in group separation studies. Most image registration algorithms are formulated in an asymmetric fashion and the solution is biased towards the transformation direction.
Marc Modat +5 more
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Deformable surfaces: a free-form shape representation
SPIE Proceedings, 1991This paper presents a technique for constructing shape representation from images using free- form deformable surfaces. We model an object as a closed surface that is deformed subject to attractive fields generated by input data points and features. Features affect the global shape of the surface while data points control its local shape.
Herve Delingette +2 more
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Preventing self-intersection under free-form deformation
IEEE Transactions on Visualization and Computer Graphics, 2001Free-Form Deformation (FFD) is a versatile and efficient modeling technique which transforms an object by warping the surrounding space. The conventional user-interface is a lattice of movable control points but this tends to be cumbersome and counterintuitive.
J.E. Gain, N.A. Dodgson
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Ray-Casting Free-Form Deformed Volume Objects
The Journal of Visualization and Computer Animation, 2003AbstractA collection of techniques is developed in this paper for ray casting free‐form deformed‐volume objects with high quality and efficiency. The known inverse ray deformation approach is combined with free‐form deformation to bend the rays to the opposite direction of the deformation, producing an image of the deformed volume without generating a ...
Chen, Haixin +2 more
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