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Log-Euclidean free-form deformation
SPIE Proceedings, 2011The Free-Form Deformation (FFD) algorithm is a widely used method for non-rigid registration. Modifications have previously been proposed to ensure topology preservation and invertibility within this framework. However, in practice, none of these yield the inverse transformation itself, and one loses the parsimonious B-spline parametrisation.
Modat, Marc +6 more
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Directly Manipulated Free-Form Deformation Image Registration
IEEE Transactions on Image Processing, 2009Previous contributions to both the research and open source software communities detailed a generalization of a fast scalar field fitting technique for cubic B-splines based on the work originally proposed by Lee . One advantage of our proposed generalized B-spline fitting approach is its immediate application to a class of nonrigid registration ...
Nicholas J, Tustison +2 more
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FPGA-Based Computation of Free-Form Deformations
2002 IEEE International Conference on Field-Programmable Technology, 2002. (FPT). Proceedings., 2003This paper describes techniques for producing FPGA-based designs that support free-form deformation in medical image processing. The free-form deformation method is based on a B-spline algorithm for modelling three-dimensional deformable objects. Our design includes four optimisations.
null Jun Jiang, W. Luk, D. Rueckert
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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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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 of solid geometric models
Proceedings of the 13th annual conference on Computer graphics and interactive techniques, 1986A technique is presented for deforming solid geometric models in a free-form manner. The technique can be used with any solid modeling system, such as CSG or B-rep. It can deform surface primitives of any type or degree: planes, quadrics, parametric surface patches, or implicitly defined surfaces, for example.
Thomas W. Sederberg, Scott R. Parry
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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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