We propose a method that recovers phase from a stack of through-focus intensity images taken with a partially coherent microscope employing illumination of any arbitrary source shape. Our algorithm uses a Kalman filtering approach, which is fast, accurate and robust to noise. We validate the method in simulation and with experimental data taken on a commercial microscope with varying condenser ...

This work is intended as an initial investigation into the perception of wideness and shape of sound sources. A method that employs mUltiple uncorrelated point sources is used in order to form "sound shapes". Several experiments were carried out in which, after some initial training, subjects were asked to indicate the shapes that were being played. Results indicate that vertical and horizontal...

The glottal shape parameter Rd provides a onedimensional parameterisation of the Liljencrants-Fant (LF) model which describes the deterministic component of the glottal source. In this paper we first propose to estimate the Rd parameter by means of extending a state-ofthe-art method based on the phase minimization criterion. Then we propose an adaption of the standard Rd parameter regression wh...

A new photometric method is proposed fo r determining the 3-D shape of t he object from multiple shading Images under the point light source illumination. When the surface is t he perfect diffuser with the uniform reflectance, an algorithm fo r the determination of 3-D shape with positions is developed by using the method of least squares and basing on the principle of the monocular vision and ...

Traditional shape from shading techniques, using a single image, do not reconstruct accurate surfaces, and have diiculty with shadow areas. Traditional shape from photometric stereo techniques have the disadvantage that they need all of the input images together at once to minimize the total cost, and this process has to be restarted if new images become available. To overcome the shortcomings ...

Shape from shading is a classical inverse problem in computer vision. This shape reconstruction problem is inherently ill-defined; it depends on the assumed light source direction. We introduce a novel mathematical formulation for calculating local surface shape based on covariant derivatives of the shading flow field, rather than the customary integral minimization or P.D.E approaches. On smoo...

Correlation functions, constructed from directional projections of the relative velocities of fragments, are used to determine the shape of the breakup volume in Preprint submitted to Elsevier 2 February 2008 coordinate space. For central collisions of Xe + Sn at 50 MeV per nucleon incident energy, measured with the 4π multi-detector INDRA at GSI, a prolate shape aligned along the beam directio...

Reconstructing a large skull defect is challenge, as it normally involves the use of sophisticated proprietary image processing and expensive CAD software. As an alternative, open-source software can be used for this purpose. This study aimed to compare 3D cranial implants reconstructed from computed tomography (CT) images using MITK with commercial 3-matic ten decompressive craniectomy patient...