Results 251 to 260 of about 5,943,425 (299)
Some of the next articles are maybe not open access.
Inverse Scale Space Theory for Inverse Problems
2001In this paper we derive scale space methods for inverse problems which satisfy the fundamental axioms of fidelity and causality and we provide numerical illustrations of the use of such methods in deblurring. These scale space methods are asymptotic formulations of the Tikhonov-Morozov regularization method.
Otmar Scherzer, Charles W. Groetsch
openaire +2 more sources
Inverse programming: Theory and examples
Mathematical Programming, 1973In this paper some simple ideas about ordered sets and inverse functions are developed into a theory of inverse pairs of optimization problems. This relationship is shown to permit the use of root-finding methods to find a solution for one problem through a sequence of solutions to the other.
R. Gordon Cassidy +2 more
openaire +1 more source
A theory of inverse light transport
Tenth IEEE International Conference on Computer Vision (ICCV'05) Volume 1, 2005In this paper we consider the problem of computing and removing interreflections in photographs of real scenes. Towards this end, we introduce the problem of inverse light transport - given a photograph of an unknown scene, decompose it into a sum of n-bounce images, where each image records the contribution of light that bounces exactly n times before
Steven M. Seitz +2 more
openaire +2 more sources
A Solution Theory of the Mobius Inversion
American Journal of Mathematics, 1946according as Ic is not square-free or is the product of exactly v =v(k) distinct primes (with the understanding that k = 1 belongs to the second case, with v(1) =0). Whether i is or is not square-free, let v(n) denote the number of its distinct prime divisors (e. g., v(12) = 2).
openaire +2 more sources
Inverse scattering inverse source theory
Journal of Mathematical Physics, 1981The inverse scattering inverse source problem associated with the inhomogeneous Helmholtz wave equation, the (special case) Sturm–Liouville (acoustic wave) equation, and the time-independent Schrödinger equation is treated . To this end, the concepts of a reference wave velocity and an associated free reference space Green’s function spectrum are ...
openaire +1 more source
1989
To end this book we shall briefly indicate the application of ill-posed integral equations of the first kind to inverse acoustic scattering problems. Of course, in one single chapter it is impossible to give a comlete picture of inverse scattering. Hence we shall content ourselves with developing some of the main ideas and will leave out much of the ...
openaire +2 more sources
To end this book we shall briefly indicate the application of ill-posed integral equations of the first kind to inverse acoustic scattering problems. Of course, in one single chapter it is impossible to give a comlete picture of inverse scattering. Hence we shall content ourselves with developing some of the main ideas and will leave out much of the ...
openaire +2 more sources
Inverse Scattering, Inverse Field, and Inverse Source Theory
1982Treated is the inverse scattering inverse source problem associated with the inhomogeneous Helmholtz wave equation, the (special case) Sturm-Liouiville (acoustic wave) equation, and the time-independent Schrodinger equation. To this end, the concepts of a reference wave velocity, and an associated free reference space Green’s function spectrum, are ...
openaire +1 more source
Theory of inverse photoemission
Journal of Physics C: Solid State Physics, 1981Electrons in the range 0-20 eV accelerated by the potential inside a surface emit photons over a range of frequencies, with a probability related by time reversal to the excitation of an electron in angle resolved photoemission. Theory indicates that the yield is high enough to make the experiments much simpler than photoemission, providing a more ...
openaire +1 more source
2011
This paper discuss a fully 3D nonlinear algorithm that results in a 3D quantitative estimate of breast tissue characteristics and a refraction corrected reflection algorithm (RFCR) that utilizes these estimates. The data are obtained from a specially designed clinical ultrasound breast scanner and processed on the device. We discuss the data collection
J. Wiskin, D. Borup, S. Johnson
openaire +1 more source
This paper discuss a fully 3D nonlinear algorithm that results in a 3D quantitative estimate of breast tissue characteristics and a refraction corrected reflection algorithm (RFCR) that utilizes these estimates. The data are obtained from a specially designed clinical ultrasound breast scanner and processed on the device. We discuss the data collection
J. Wiskin, D. Borup, S. Johnson
openaire +1 more source