نتایج جستجو برای: disparity

تعداد نتایج: 16104  

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 1998
D C Bradley R A Andersen

Most neurons in primate visual area MT have a large, modulatory region surrounding their classically defined receptive field, or center. The velocity tuning of this "surround" is generally antagonistic to the center, making it potentially useful for detecting image discontinuities on the basis of differential motion. Because classical MT receptive fields are also disparity-selective, one might ...

2005
Martin S. Banks Sergei Gepshtein Heather F. Rose

As the disparity gradient of a stimulus increases, human observers’ ability to solve the correspondence problem and thereby estimate the disparities becomes poorer. It finally fails altogether when a critical gradient—the disparity-gradient limit (Burt & Julesz, 1980)—is reached. We investigated the cause of the disparity-gradient limit. As part of this work, we developed a local cross-correlat...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2012
Matthew L Patten Aidan P Murphy

Editor's Note: These short, critical reviews of recent papers in the Journal, written exclusively by graduate students or postdoctoral fellows, are intended to summarize the important findings of the paper and provide additional insight and commentary. For more information on the format and purpose of the Journal Club, please see Review of Krug and Parker Binocular disparity results from the su...

1997
Chun-Jen Tsai Aggelos K. Katsaggelos

This paper presents a technique for multi-channel optical ow estimation. We combine the brightness constancy constraint with the relationship between optical ow elds and disparity elds in estimating optical ow elds by solving systems of linear equations. In this formulation, the so called round-about compatibility constraint is used to ensure the coherence between optical ow elds and to pin dow...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 1999
B G Cumming A J Parker

Most neurophysiological accounts of disparity selectivity in neurons of the primary visual cortex (V1) imply that they are selective for absolute retinal disparities. By contrast, a number of psychophysical observations indicate that relative disparities play a more important role in depth perception. During recordings from disparity selective neurons in area V1 of awake behaving monkeys, we us...

Journal: :J. Inform. and Commun. Convergence Engineering 2011
Rohit Ramesh Heung-Sub Shin Shin Il Jeong Wan-Young Chung

83 Abstract— Image segmentation is always a challenging task in computer vision as well as in pattern recognition. Nowadays, this method has great importance in the field of stereo vision. The disparity information extracting from the binocular image pairs has essential relevance in the fields like Stereoscopic (3D) Imaging Systems, Virtual Reality and 3D Graphics. The term 'disparity' represen...

2008
Sam Harper John Lynch Stephen C. Meersman Nancy Breen William W. Davis Marsha E. Reichman

The authors provide an overview of methods for summarizing social disparities in health using the example of lung cancer. They apply four measures of relative disparity and three measures of absolute disparity to trends in US lung cancer incidence by area-socioeconomic position and race-ethnicity from 1992 to 2004. Among females, measures of absolute and relative disparity suggested that area-s...

Journal: :Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology 2010
Mario Schootman Min Lian Anjali D Deshpande Elizabeth A Baker Sandi L Pruitt Rebecca Aft Donna B Jeffe

BACKGROUND A goal of Healthy People 2010 was to reduce health disparities. We determined the extent of reductions in geographic disparities in five breast cancer screening indicators. METHODS We examined the extent of reductions in geographic disparities in five breast cancer screening indicators using data about women ages 40 years and older from 200 counties in the 1988 to 2005 Surveillance...

Journal: :Vision Research 1996
Robert Patterson Christopher Bowd Ray Phinney Robert Fox Stephen Lehmkuhle

Across five experiments this study investigated the disparity tuning of the stereoscopic motion aftereffect (adaptation from moving retinal disparity). Adapting and test stimuli were moving and stationary stereoscopic grating patterns, respectively, created from dynamic random-dot stereograms. Observers adapted to moving stereoscopic grating patterns presented with a given disparity and viewed ...

2006
PING AN ZHAOYANG ZHANG RAN MA

Since image quality of the synthesized intermediate view depends mainly on precise and dense disparity field and on detection of occlusion in multi-view applications, this paper proposes an intermediate view creation and interpolation algorithm taking advantages of transmitted and decoded disparity fields to avoid complex disparity calculation. This algorithm also combines region segmentation a...

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