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Research News Archive
The project's gazette on breaking results from the different labs of the consortium


07 May 2010 - Visual feature extraction in foveated systems
 

The log-polar imaging is a well established paradigm for simplifying a wide number of computational problems in active vision, since simultaneously provides a wide field-of-view, high spatial resolution on the fovea, and a significant data reduction. These features are well suitable for visual systems that continuously interact with the environment, by purposefully moving the eyes to bring the interesting objects into the foveas.
   
    M. Chessa, S.P. Sabatini, F. Solari
    Department of Biophysical and Electronic Engineering (DIBE)
    University of Genoa

26 April 2010 - Visuomotor spatial awareness through concurrent reach/gaze actions
 

The execution of gazing and reaching movements toward the same target is the fundamental building block for learning to coordinate the processing of visual information with body motor control in natural and artificial agents. Taking inspiration from human and primate studies, we developed a computational framework that allows an artificial agent to learn to interact with objects in its peripersonal space.
   
    Eris Chinellato, Marco Antonelli, Beata Joanna Grzyb, Angel P. del Pobil
    Robotic Intelligence Laboratory
    Department of Engineering and Computer Science
    Universitat Jaume I de Castellon (UJI)

21 April 2010 - Covert shift of attention modulates the ongoing neural activity in a reaching area of the macaque dorsomedial visual stream
 

Posterior parietal area V6A is involved in shifting covert attention in space. The major results we achieved can be summarized as follows:
 - neurons in the cortical pathway for reaching are influenced by spatial attention
 - the attentional modulation occurs also without gaze shifts or visual stimulation
 - visual, motor, and attentional responses can occur in combination in single neurons..
   
    Claudio Galletti(1), Rossella Breveglieri(1), Markus Lappe(2), Annalisa Bosco(1),
    Marco Ciavarro(1), Patrizia Fattori(1)
    Department of Human and General Physiology
    University of Bologna (1)
    Department of Psychology
    University of Münster (2)

12 April 2010 - Saccadic adapation modifies perceptual localization
 

An experimental modification of the motor control of saccadic eye movements leads to an associated change in the perceived location of objects. The tight agreement between the amount of change of eye movement control and the amount of change of localization shows that perceptual space is shaped by motor knowledge rather than simply constructed from visual input.
   
    Eckart Zimmermann, Markus Lappe
    Department of Psychology
    University of Münster, Germany

8 May 2009 - Evidence for Peak-shaped Gaze Fields in Area V6A: Implications for Sensorimotor Transformations in Reaching Tasks
 

The majority of the gaze-related cells of the parietal area V6A of the macaque are non-linearly tuned. The use of non-linear, peak-shaped gaze fields improves the efficiency of the coding scheme of the position of reaching targets, expecially when a small number of units is avaliable.
   
    Breveglieri, R.(1), Bosco, A.(1), Canessa, A.(2), Fattori, P.(1), Sabatini, S.P.(2)
    Department of Human and General Physiology
    University of Bologna (1)
    Department of Biophysical and Electronic Engineering (DIBE)
    University of Genoa (2)

27 March 2009 - Learning receptive fields out of natural scenes with an biological motivated model of rate coded neurons
 

A model for learning receptive fields out of natural scenes. This model is based on biological motivated assumptions like attention and Hebbian learning and leads to receptive fields that are very similar to those measured by electrophysiological recordings.
   
    F.H. Hamker, J. Wiltschut
    Department of Psychology
    University of Münster (Germany)



24 March 2009 - Vergence simulator
 

The first version of the vergence simulator is ready. The simulator has been developed as a MATLAB-based platform for vergence control strategies development, modeling and testing. But it also can be used in wide spectrum of tasks, in which 3D modeling is involved, e.g. generation of the synthetic stereo images, computation of the ground truth optical flow, and disparity statistics estimation for the 3D scenes etc.
Nikolay Chumerin
Computational Neuroscience Research Group
Laboratorium voor Neuro- en Psychofysiologie
K.U.Leuven

23 March 2009 - A Virtual Reality Simulator for Active Vision Systems
 

The novelty of the proposed approach is to use the Virtual Reality as a tool to simulate the behavior of physical systems, in particular of the visual system of a robot, rather than to make the perceptual rendering of the visual information exploitable by human users.
   
    M. Chessa, S.P. Sabatini, F. Solari
    Department of Biophysical and Electronic Engineering (DIBE)
    University of Genoa



03 March 2009 - Reading out Binocular Energy Population Codes for Short-latency Disparity-vergence Eye Movements
 

A model for the extraction of the vergence control signals, without computing the disparity map, is proposed. The model, based on a population of specialized disparity detectors, has been tested in vergence task on a plane moving in depth.
   
    A. Gibaldi, M. Chessa, A. Canessa, S.P. Sabatini, F. Solari
    Department of Biophysical and Electronic Engineering (DIBE)
    University of Genoa



                                                      WEBMASTER: Agostino Gibaldi (UG)