Results 291 to 300 of about 6,042,098 (320)
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Estimating VP/VS ratios using smooth dynamic image warping
, 2014Multicomponent seismic images are composed of different combinations of downgoing and upgoing wavefields. Each wave mode has different propagation velocity and polarization direction and thus carries unique, direction-dependent information about the ...
Stefan Compton, D. Hale
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Linearized wave-equation migration velocity analysis by image warping
, 2014Seismic imaging produces images of contrasts in physical parameters in the subsurface, e.g., velocity or impedance. To build such images, a background model describing the wave kinematics in the earth is necessary.
F. Perrone +3 more
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1st IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, 2005., 2006
In factor analysis of sequential data (e.g., time-series or digitized images), the measurement sequence remains "intact" and is assumed to be consistent across all measurement conditions. Otherwise, recovered sequential factors would be distorted. Shifted and warped factor analyses (SFA and WFA) explicitly fit such measurement-sequence inconsistency ...
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In factor analysis of sequential data (e.g., time-series or digitized images), the measurement sequence remains "intact" and is assumed to be consistent across all measurement conditions. Otherwise, recovered sequential factors would be distorted. Shifted and warped factor analyses (SFA and WFA) explicitly fit such measurement-sequence inconsistency ...
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Warped anisotropic diffusion of ultrasound image
TENCON 2009 - 2009 IEEE Region 10 Conference, 2009Ultrasound images contain speckle noise that creates granular pattern which degrades their quality. Typically, the granular noise has a circular pattern that circles the position of the ultrasound probe which acts as it center. As such, anisotropic diffusion filter cannot completely remove the granular noise.
Mohd Marzuki Mustafa +2 more
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Mosaic and warping for forward moving images
Proceedings. Computer Graphics International 2001, 2002Discusses mosaicking and warping for forward-motion (or forward-moving) images (FMI). In FMI, the field of view of one frame is wider than that of a later one; however, the resolution of the later frame is higher than that of previous one. Warp-function algorithms based respectively on a mesh warp and a triangle grid are presented, and a multi ...
Su Zhang, Hanfeng Chen, Pengfei Shi
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Image Warping in Dermatological Image Hair Removal
2014The paper focuses on solving the problem of hair removal in dermatology applications. The proposed hair removal algorithm is based on Gabor filtering and PDE-based image reconstruction. It also includes the edge sharpening stage using a new warping algorithm.
Andrey S. Krylov +5 more
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Parameterizing reconfigurable designs for image warping
SPIE Proceedings, 2002This paper describes reconfigurable computing techniques for optimising image warping designs.Our image warping algorithm is based on radial basis functions, which enable the warping effect to be specified in terms of feature points. The coefficients of the warping function are obtained from the Symmetric Bipartite Table Method (SBTM), and the lookup ...
Wayne Luk +3 more
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From Bayes to PDEs in Image Warping
2005In many disciplines of computer vision, such as stereo vision, flow computation, medical image registration, the essential computational problem is the geometrical alignment of images. In this chapter we describe how such an alignment may be obtained as statistical optimal through solving a partial differential equation (PDE) in the matching function ...
Nielsen, Mads, Markussen, Bo
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Efficient Displacement Mapping by Image Warping [PDF]
, 1999 While displacement maps can provide a rich set of visual detail on otherwise simple surfaces, they have always been very expensive to render. Rendering has been done using ray-tracing and by introducing a great number of micro-polygons. We present a new image-based approach by showing that rendering displacement maps is sufficiently similar to image ...
Gernot Schaufler, Markus Priglinger
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, 2013
A kinematically correct choice of velocity focuses subsurface offset image gathers at zero offset. Infinitesimal warping from the current image towards its focus can be approximated by a horizontal contraction. The image residual can be then taken as the
P. Shen, W. Symes
semanticscholar +1 more source
A kinematically correct choice of velocity focuses subsurface offset image gathers at zero offset. Infinitesimal warping from the current image towards its focus can be approximated by a horizontal contraction. The image residual can be then taken as the
P. Shen, W. Symes
semanticscholar +1 more source