CVNet: CVNet - Call for papers. OSA Annual Meeting

Tentative Program

TILLYER AWARD LECTURE

EXCEEDING THE RESOLUTION LIMIT OF THE HUMAN EYE (TUTORIAL)
David Williams, University of Rochester

Both laser interferometry and adaptive optics can greatly reduce the blur produced by the normal eye's optics. This tutorial will review what these techniques have told us about the optical and neural factors that limit human spatial and color vision.

COLOR TECHNICAL=20 GROUP

ADAPTATION
Rhea Eskew, Northeastern University, Organizer

Sensitivity regulation is one of the most challenging tasks faced by biological vision systems, given that the input dynamic range is over 10 log units. This symposium will cover recent developments in the study of light adaptation.

Invited Speakers:

"Adaptation through the primate retina,"
Barry Lee, Max Planck Institute for Biophysical Chemistry

"Regulating the output: what where?"
Walter Makous, University of Rochester

"Nonlinear dynamics and visual adaptation,"
Hugh Wilson, University of Chicago

COLOR MECHANISMS
Michael Webster, University of Nevada, Organizer

This symposium will focus on postreceptoral mechanisms of color vision, with an emphasis on features of color coding in higher-order, cortical mechanisms.

Invited Speakers:

"Benefits and side effects of split-range opponent coding,"
Donald MacLeod, University of California - San Diego

"How cells in striate cortex integrate input from different LGN cell types,"
Russell De Valois, University of California - Berkeley

"Separating luminance and red-green detection mechanisms with steady chromatic adaptation,"
Charles Stromeyer III, Harvard University

WHAT'S NEW IN COLOR ASSIMILATION?
Vivianne Smith, University of Chicago, Organizer

Color assimilation occurs when a region assumes the hue content of an adjacent or surrounding color. Explanations include spread light and neural interactions. This symposium considers the visual mechanisms that contribute to this complex phenomenon.

Invited Speakers:

"Demonstrations of Color Assimilation: What questions do they pose?"
Joy Turner Luke, Studio 231

"Color Assimilation in L, M, S space,"
Steven K. Shevell, University of Chicago

PERIPHERAL COLOR VISION
Andrew Stockman, University of California - San Diego, Organizer

We will consider factors that influence peripheral color vision, including the effects of photoreceptor populations, rod photoreceptors and changes in sensitivity and gain control with eccentricity.

Invited Speakers:

"The role of photoreceptor populations in peripheral color perception," Janice Nerger, Colorado State University

"How do rods affect color vision?"
Roger Knight, University of Washington

"Effects of eccentricity on chromatic sensitivity and gain control in normal and diseased eyes,"
Bill Swanson, Retina Foundation of the Southwest

VISION TECHNICAL GROUP

ADVANCES IN LIGHTNESS/BRIGHTNESS PERCEPTION (WORKSHOP)
Mark McCourt, North Dakota State University, Organizer

The topic of brightness/lightness perception has attracted a great deal of attention lately and has generated lively debate. This workshop will focus on various distinct theoretical approaches to brightness/lightness perception. An enhanced understanding of brightness coding and representation will hopefully illuminate poorly understood aspects of spatial vision, color vision, and surface perception as well.

Workshop Participants:

"Simultaneous contrast, past and present,"
Fred Kingdom, McGill Vision Research

"Decomposing luminance into layered image representations,"
Bart Anderson, Massachusetts Institute of Technology

"Statistical and configural effects in lightness perception,"
Ted Adelson, Massachusetts Institute of Technology

"Brightness perception and neural interactions in visual
cortex,"
Mike Paradiso, Brown University

"Surface lightness as the product of anchoring within perceptual groups,"
Alan Gilchrist, Rutgers University

"Junctions versus gestalts," Qasim Zaidi,
SUNY College of Optometry

"Lightness, brightness and illumination,"
Dejan Todorovic, University of Belgrade

"Render unto Hering: A nonlinear multiscale filtering account of brightness phenomena,"
Barbara Blakeslee and Mark McCourt, North Dakota State University

VISION MODELS FOR IMAGE QUALITY ASSESSMENT
Ann Marie Rohaly, Tektronix Inc., Organizer

Models of visual detection and discrimination are migrating out of the laboratory and into the real world. This symposium will highlight one application area in which vision models are making a significant contribution: the assessment of perceptual image quality.

Invited Speakers:

"Video Quality Experts Group: The Quest for Valid Objective Methods,"
Philip Corriveau, Communications Research Centre

"Video Compression and Human Vision,"
Heidi Peterson, Sarnoff Corporation

OCCLUSION, LAYERS, JUNCTIONS AND MOTION
Anthony Norcia, Smith-Kettlewell Eye Research Institute, Organizer

The mechanisms by which the visual system is able to recover the layout of surfaces in the environment and the motions of objects through visual scene is an enduring problem. The focus of this symposium will be on the mechanisms of surface extraction and depth-ordering, emphasizing recent approaches that integrate low-level image measurements with "middle-level" constraints from viewing geometry.

Invited Speakers:

"Bayesian combination of motion signals,"
Yair Weiss, University of California -Berkeley

"TBA,"
Ken Nakayama, Harvard University

EYE MOVEMENTS AND VISUAL SEARCH
Lee Stone, NASA Ames Research Center, Organizer

This symposium will explore recent progress in our understanding of the interplay between vision and saccades, in particular the links between neural processing for vision, attention, and saccades, between perceptual localization and saccadic targeting, and between oculomotor performance and cognitive strategies during search.

Invited Speakers:

"Perceptual and saccadic performance during search," Miguel Eckstein, Cedars - Sinai Medical Center

"Neural selection of targets for eye movements," Jeffrey Schall, Vanderbilt University

"Understanding cognition through visual search behaviors," Elizabeth Krupinski, University of Arizona

MODELFEST '99: COMPARING DETECTION MODELS (WORKSHOP)
Stanley Klein, Universit= y of California - Berkeley, Organizer

There are a variety of spatial vision models that claim to do a good job in predicting the detection threshold of arbitrary spatial patterns. This workshop will provide a forum for evaluating these models (including a consideration of goodness of fit metrics). Thresholds for a large battery of stimuli are currently being measured in several psychophysical laboratories. Some of these thresholds will be made available for fixing model parameters, while others will be used for testing the models.

FINDING THE IMAGE FEATURE= S USED IN VISUAL TASKS
Albert Ahumada, NASA Ame= s Research Center, Organizer

Random and pseudo-random noise inputs have long been used to characterize system processing in engineering, neurophysiology, and in auditory detection. Recently, a number of papers have been presenting using this technique to find the image features used in visual discrimination and identification tasks. This symposium will include applications of the technique and analyses of theoretical and methodological issues.

Invited Speakers:

"Novel properties of neurons in monkey primary visual cortex revealed by stimulation with natural image sequences,"
Dario Ringach, New York University

"Nonlinear image and motion features in a geometric framework,"
Erhardt Barth, NASA Ames Research Center

"Using noise to identify critical features in a temporal detection task,"
Kenneth Knoblauch, Universite Jean Monnet - Saint Etienne, and James P. Thomas, University of California - Los Angeles

FUNCTIONAL MRI (Tutorial)
Andrew Stockman, University of California - San Diego, Organizer

This tutorial will cover the principles of Functional Magnetic Resonance Imaging (fMRI) and its application to the study of brain and vision.

Invited Speakers:

"Principles of fMRI,"
Richard Buxton, University of California - San Diego

"fMRI and visual psychophysics: bridging the gap between brain and behavior,"
Geoff Boynton, Salk Institute

LONG RANGE INTERACTIONS
Paul DeMarco, University of Louisville and Arthur Shapiro, Bucknell University, Organizers

The perception of a visual stimulus often depends upon the context in which the stimulus is presented. The purpose of this symposium is to present research that addresses how spatially and temporally separate regions of the visual field interact to affect visual performance.

Invited Speakers:

"Multiple normalization processes in contrast-contrast phenomena,"
Lynn A. Olzak, Miami University of Ohio, and Pentti I. Laurinen, University of Helsinki

"Contrast Sensitivity in Uniform and Complex Surrounds,"
Branka Spehar, University of New South Wales, and Qasim Zaidi, SUNY College of Optometry

APPLICATIONS OF VISION SCIENCE TECHNICAL GROUP

ACCOMMODATION: EXPERIMENTAL AND MODEL STUDIES
Vasudevan Lakshminarayanan, University of Missouri - St. Louis, Organizer

The mechanism by which animals focus at a distance and nearby can vary considerably from species to species. The speakers in this symposium will describe some of these processes, emphasizing the physiological mechanisms underlying image formation and the unique visual solutions non-primates and primates have developed.
Invited Speakers :

"Visual focusing strategies in the animal world,"
Jacob Sivak, University of Waterloo

"Ocular focusing mechanisms and their aging in sub-human primates,"
Paul Kaufman, University of Wisconsin - Madison

"Development and aging of human visual focusing mechanisms,"
Jane Koretz, Rensselaer Polytech Institute

CORRECTING ABERRATIONS OF THE EYE
Raymond Applegate, University of Texas Health Science Center at San Antonio, Organizer

It is feasible to surgically correct the optical defects of the eye. Speakers will present practical considerations for modeling, measuring, and surgically correcting the aberrations of the eye.

Invited Speakers:

"Practical limitations to correcting the eye's optical aberrations through refractive surgery,"
Stanley Klein, University of California, Berkeley

"Issues in the measurement and specification of the eye's aberrations,"
Larry Thibos, Indiana University

ADVANCED RETINAL IMAGING TECHNIQUES FOR NONINVASIVE DIAGNOSTICS