We introduce a universal and systematic way of defining a generalized Bspline based on a linear shift-invariant (LSI) operator L (a.k.a. Fourier multiplier). The generic form of the B-spline is βL = LdL −1δ where L−1δ is the Green’s function of L and where Ld is the discretized version of the operator that has the smallest-possible null space. The cornerstone of our approach is a main construct...

Recently, many methods have been proposed for face reconstruction from multiple images, most of which involve fundamental principles of Shape from Shading and Structure from motion. However, a majority of the methods just generate discrete surface model of face. In this paper, Bspline Shape from Motion and Shading (BsSfMS) is proposed to reconstruct continuous B-spline surface for multiview fac...

We extend previous results on the spectral distribution of discretization matrices arising from Bspline Isogeometric Analysis (IgA) approximations of a general d-dimensional second-order elliptic Partial Differential Equation (PDE) with variable coefficients. First, we provide the spectral symbol of the Galerkin B-spline IgA stiffness matrices, assuming only that the PDE coefficients belong to ...

MR – CT image registration has been used in the liver cancer treatment with an open MR Scanner to guide percutaneous puncture for ablation of tumors. Due to low magnetic field and limited acquisition time, MR images do not always show the target clearly. Sometimes, assistance of CT images is helpful for the navigation to the target. The shape of the liver within the surgical procedure is differ...

A major challenge when designing general purpose graphics hardware is to allow efficient access to texture data. Although different rendering paradigms vary with respect to their data access patterns, there is no flexibility when it comes to data caching provided by the graphics architecture. In this paper we focus on volume ray-casting, and show the benefits of algorithm-aware data caching. Ou...

In remote sensing, because of the wide diversity of image characteristics (size, spatial and radiometric resolution, terrain relief, observation poses, etc.), image registration methods that may work well on certain satellite images will not produce acceptable results for others, requiring more powerful techniques. A variety of registration techniques for images with non-rigid geometric differe...

In this paper two new algorithms for left ventricular (LV) endocardial and epicardial boundary detection from echocardiographic images are presented. The proposed algorithms are Center-Based approach in which the LV center point (LVCP) is estimated using a fuzzy-Based technique and then epicardial and endocardial edge points are searched on radial lines emanating from LVCP. A basic assumption i...