Talks: Human Computer Vision Series

In fields ranging from technical illustration to mapmaking artists have developed distinctive visual styles designed to convey both detail and overall shape as clearly as possible.� We investigate a non-photorealistic

The last 25 years of research on 3D shape perception have been dominated by Marr's theory. According to Marr the visual system reconstructs the visible surfaces first and then forms

T he mental representation of shape a critical problem in visual perception is still surprisingly poorly understood. For example it is widely accepted that a critical part of shape representation

Given that an agent must act under uncertainty and humans communicate uncertainty during conversation endowing an embodied conversational agent (ECA) with the ability to express and recognize it becomes one

Pictures are a special class of visual surfaces that rarely occur in nature yet the effects observed in viewing them may provide clues to the nature of surface perception in

Statistical representations of visual patterns are commonly used incomputer vision. One such representation is a distribution measured fromthe output of a bank of filters (Gaussian Laplacian Gabor waveletetc). Both marginal

Accurate position sensing is a critical element of mobile robotic systems and also plays an important role in coordination and information sharing in multi-entity operations involving humans. The developments of

The nature of saccadic eye movements raises the question of how information from separate fixations is integrated into a single percept. I will discuss two mechanisms that may be involved

After Pavlov (1927) it seemed clear that the visual system should be trainable by means of paired association (Fieandt 1936; Hebb 1949; Brunswik 1953 1956; Smedslund 1955). But this prediction

We study biases (decision criteria) observers have when reporting aboutvisual stimuli in conditions where more than one stimulus need to bedetected. We find that while with a single stimulus observers

Humans can recognize the gist of a scene in a single glance independent of the complexity of the visual image. How is this remarkable feat accomplished? Research over the last

I will discuss some of our work on modeling stereoscopic depth perception based on physiological properties of binocular cells in the visual cortex. I will show that binocular disparity maps

Perceptual transparency is a unique phenomenon of visual object segmentation in which a single retinal intensity is interpreted as arising from two (or more) material layers separated in depth. Although

Learning to integrate information is a key task a child?s brain has to perform during the normal developmental course. Such learning makes explicit which entities in the sensory inputs regularly

Any purposeful action reflects a desire to turn from the current sensory state to a more advantageous sensory state which thus represents the goal of the action. Natural object manipulations

To perform visual search humans like many other mammals encode a large field of view with a visual system having variable spatial resolution and then use high-speed eye movements to

Williams syndrome is a genetic disorder which gives rise to an unusual cognitive profile including severe spatial deficits together with relatively spared language. The exact nature of the spatial impairment

It is well known that attention enables us to selectively process useful visual information in both daily life activities and lab-designed behavior tasks. To cope the variable challenges attention

Identification of objects and materials across illuminants is one of the most important functions of color vision. The unresolved question is whether identification is based on constancy of perceived

Behavioral experiments have shown that the human visual system makes extensiveuse of scene contextual information for facilitating object detection andrecognition. However the question of how to formally model such contextualinfluences

Orientation-defined textures (ODT) are of a particular significance to low and intermediate level vision and here we investigate them from a computational psychophysical and physiologicial perspectives. Geometrically we show that

The World in Eyes Human eyes have been studied extensively in various research fields. Most of such studies are concerned with the anatomy physiology and visual perception of the

The imaging system or camera is central to all vision systems. Typically when one thinks of a camera one imagines a traditional "perspective lens" based system. Although very useful these

December 1 2003 at 2:00 p.m. Psychology Room 101 Busch Campus Ravi Ramamoorthi Columbia University Department of Computer Science Signal-Theoretic Representations of Appearance Many problems in computer vision and computer

September 29 2003 at 2:00 p.m. Psychology Room 101 Busch Campus Anthony Hoogs GE Global Research Video Content Annotation Using Visual Analysis and a Large Semantic Knowledgebase We present a

September 22 2003 at 2:00 p.m. Psychology Room 101 Busch Campus Margarita Osadchy NEC Labs America Inc. Using Specularities for Recognition Recognition systems have generally treated specular highlights as noise.

Wednesday May 28 2003 at 1:00 pm RuCCS A139 Dr. Sylvia Pont Dept. of Physics and Astronomy Program Human Perception Helmholtz Institute Ecological optics of natural materials Why does

Note: Talk time is at 1:00 pm for THURSDAY May 15 Raymond van Ee The Helmholtz Institute Utrecht University The Netherlands Conscious Bi-Stable Depth Perception: Bayesian Modeling Eye

April 14 2003 C. Edward Connor John Hopkins University Department of Neuroscience Shape Information Processing in the Ventral Visual Pathway Object shape is represented by large populations of neurons

FRIDAY April 4 Bruno G. Breitmeyer Professor Department of Psychology University of Houston Masking and the "Visual Zombie": Modes and Levels of Unconscious Visual Processing Targets masked from conscious

March 31 Chris Bregler Computer Science Department Courant Institute New York University Capturing Motion Models for Animation We will survey our current research efforts on vision based capture and

March 24 Robert Sekular Professor of Cognitive Neuroscience Francis & Louis Salvage Professor of Psychology Volen Center for Complex Systems Brandeis University Remembrance of things (just) past: A trial

View Synthesis with Occlusion Reasoning using Quasi-Sparse Feature Correspondences March 03 �� Camillo J. Taylor �� (University of Pennsylvania Computer and Information Science Dept.) Abstract: The goal of most image

Early in visual processing the retinal image is highly fragmented with each visual neuron having a very small (local) receptive field.� How is this information 'put back together' to represent

Visual Scene Segmentation: The Local/Global Puzzle Feb 17 Nava Rubin (New York University Center for Neural Science) TALK POSTPONED UNTIL MONDAY FEBRUARY 24 2003 (ONE WEEK LATER)