In this paper, we propose an algorithm for the measure of local and global contrast in digital images. It applies locally, at various sub-sampled levels, a simplified computation of local contrast based on DOG and finally it recombines all the values to obtain a global measure. The proposed method comes from the modification of a previous algorithm with a different local measure of contrast and...

The central scheme of Nessyahu and Tadmor [J. Comput. Phys., 87 (1990), pp. 408–463] solves hyperbolic conservation laws on a staggered mesh and avoids solving Riemann problems across cell boundaries. To overcome the difficulty of excessive numerical dissipation for small time steps, the recent work of Kurganov and Tadmor [J. Comput. Phys., 160 (2000), pp. 241–282] employs a variable control vo...

We present results of the application of the anisotropic hydrodynamics (aHydro) framework to (2+1)dimensional boost-invariant systems. The necessary aHydro dynamical equations are derived by taking moments of the Boltzmann equation using a momentum-space anisotropic one-particle distribution function. We present a derivation of the necessary equations and then proceed to numerical solutions of ...

In the seminal paper E. Tadmor, S. Nezzar and L. Vese, A multiscale image representation using hierarchical \((BV, L^2)\) decompositions, Multiscale Model. Simul., 2(4), 554–579, (2004), authors introduce a decomposition model providing of given into sum scale-varying components. line with this framework, we extend approach to case registration, task which consists mapping salient features an o...

in this paper, an investigation on the relation between state-building and near eastern religion is attempted. analyzing the city-state of ḥaṭrā (iraq, close to kirkuk), it is demonstrated that pre-islamic state craft in the region was dependent on the initiative of the parthian monarchy in iran. the kings of the arsacid dynasty attempted to bestow the local arabic tribes in the jazira with a c...

In this project, we develop a Hierarchical Decomposition algorithm to solve the `1-Regularized Least Square problem: min x∈Rn {||x||`1 ∣∣Ax = b}. With the new approach, we show a systemic approach on how to select a family of regularization parameters λ’s in order to improve accuracy while retaining the sparsity of our approximation. 1 Background: A Constrained `0 Minimization In the recent dec...

An image registration technique is presented for the registration of medical images using a hybrid combination of coarse-scale landmark and B-splines deformable registration techniques. The technique is particularly effective for registration problems in which the images to be registered contain large localized deformations. A brief overview of landmark and deformable registration techniques is...

Much attention has been paid in the literature to total-variation-diminishing (TVD) numerical processes in the solution of nonlinear hyperbolic differential equations. For special Runge– Kutta methods, conditions on the stepsize were derived that are sufficient for the TVD property; see, e.g., Shu and Osher [J. Comput. Phys., 77 (1988), pp. 439–471] and Gottlieb and Shu [Math. Comp., 67 (1998),...