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ICASSP
2011
IEEE
8 years 6 months ago
No-reference bit stream model for video quality assessment of h.264/AVC video based on packet loss visibility
In this paper, a no reference bit stream model for quality assessment of SD and HD H.264/AVC video sequences based on packet loss visibility is proposed. The method considers the ...
Savvas Argyropoulos, Alexander Raake, Marie-Neige ...
TOG
2010
118views more  TOG 2010»
8 years 9 months ago
A hierarchical volumetric shadow algorithm for single scattering
Volumetric effects such as beams of light through participating media are an important component in the appearance of the natural world. Many such effects can be faithfully modele...
Ilya Baran, Jiawen Chen, Jonathan Ragan-Kelley, Fr...
TVCG
2011
146views more  TVCG 2011»
8 years 9 months ago
Visibility Histograms and Visibility-Driven Transfer Functions
—Direct volume rendering is an important tool for visualizing complex data sets. However, in the process of generating 2D images from 3D data, information is lost in the form of ...
Carlos D. Correa, Kwan-Liu Ma
CAIP
2009
Springer
182views Image Analysis» more  CAIP 2009»
9 years 7 days ago
Atmospheric Visibility Monitoring Using Digital Image Analysis Techniques
Atmospheric visibility is a standard of human visual perception of the environment. It is also directly associated with air quality, polluted species and climate. The influence of ...
Jiun-Jian Liaw, Ssu-Bin Lian, Yung-Fa Huang, Rung ...
ICIP
2010
IEEE
9 years 11 days ago
Semi-supervised regression with temporal image sequences
We consider a semi-supervised regression setting where we have temporal sequences of partially labeled data, under the assumption that the labels should vary slowly along a sequen...
Ling Xie, Miguel Á. Carreira-Perpiñ&...
ICRA
2010
IEEE
116views Robotics» more  ICRA 2010»
9 years 28 days ago
Learning visibility of landmarks for vision-based localization
— We aim to perform robust and fast vision-based localization using a pre-existing large map of the scene. A key step in localization is associating the features extracted from t...
Pablo Fernández Alcantarilla, Sang Min Oh, ...
PAMI
2007
99views more  PAMI 2007»
9 years 1 months ago
Regularized Image Recovery in Scattering Media
—When imaging in scattering media, visibility degrades as objects become more distant. Visibility can be significantly restored by computer vision methods that account for physic...
Yoav Y. Schechner, Yuval Averbuch
CGF
1999
159views more  CGF 1999»
9 years 2 months ago
Fast Polyhedral Cell Sorting for Interactive Rendering of Unstructured Grids
Direct volume rendering based on projective methods works by projecting, in visibility order, the polyhedral cells of a mesh onto the image plane, and incrementally compositing th...
João Comba, James T. Klosowski, Nelson L. M...
TOG
2008
163views more  TOG 2008»
9 years 2 months ago
Imperfect shadow maps for efficient computation of indirect illumination
We present a method for interactive computation of indirect illumination in large and fully dynamic scenes based on approximate visibility queries. While the high-frequency nature...
Tobias Ritschel, Thorsten Grosch, Min H. Kim, Hans...
TCS
2008
9 years 2 months ago
The role of information in the cop-robber game
We investigate the role of the information available to the players on the outcome of the cops and robbers game. This game takes place on a graph and players move along the edges ...
Volkan Isler, Nikhil Karnad
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