inverse problem
A modified 4D ROOSTER method using the Chambolle-Pock algorithm
Abstract: The 4D RecOnstructiOn using Spatial and TEmpo- ral Regularization method is a recent 4D cone beam computed tomography algorithm. 4D ROOSTER has not been rigorously proved to converge. This paper aims to reformulate it using the Chambolle & Pock primal-dual optimization scheme.
Bits of Images: Inverting Local Image Binary Descriptors
(print (nth 5 (org-heading-components))) Abstract: Local Binary Descriptors (LBDs) are good at matching image parts, but what information is actually carried? This question is usually masked by a comparison of matching performances.
Compressive Acquisition of Sparse Deflectometric Maps
Abstract: Schlieren deflectometry aims at measuring deflections of light rays from transparent objects, which is subsequently used to characterize the objects. With each location on a smooth object surface a sparse deflection map (or spectrum) is associated.
Consistent Iterative Hard Thresholding for Signal Declipping
Abstract: Clipping or saturation in audio signals is a very common problem in signal processing, for which, in the severe case, there is still no satisfactory solution. In such case, there is a tremendous loss of information, and traditional methods fail to appropriately recover the signal.
Sparsity-driven optical deflection tomography with non-linear light ray propagation
Abstract: Optical deflection tomography based on phase-shifting Schlieren is well adapted for three-dimensional imaging of objects with large refractive index variations. We propose a reconstruction algorithm that takes into account light refraction and spatial sparsity of the sample.
Tomography of the magnetic fields of the Milky Way?
Laurent Duval - Dec 5, 2011
16 month is quite short when you compare to cosmic times
Tomography of the magnetic fields of the Milky Way?
I have just found this “new” (well 150 years old actually) tomographical method… for measuring the magnetic field of our own galaxy
“New all-sky map shows the magnetic fields of the Milky Way with the highest precision”
Tomography of the magnetic fields of the Milky Way?
I have just found this “new” (well 150 years old actually) tomographical method… for measuring the magnetic field of our own galaxy
“New all-sky map shows the magnetic fields of the Milky Way with the highest precision"
Optical tomography based on phase-shifting schlieren deflectometry
Abstract: We present a new optical tomography technique based on phase-shifting schlieren deflectometry. The principle is that of computerized tomography. The three-dimensional profile is reconstructed from the deflection angles of rays passing through the tested object.