GIBALDI , Agostino

Depth perception in near viewing strongly relies on the interpretation of binocular retinal disparity to obtain stereopsis. Statistical regularities of retinal disparities have been claimed to greatly impact on the neural mechanisms that underlie binocular vision, both to facilitate perceptual decisions and to reduce computational load. In this...

A neural network architecture able to autonomously learn effective disparity-vergence responses and drive the vergence eye movements of a simulated binocular active vision system is proposed. The proposed approach, instead of exploiting purposely designed resources, relies on the direct use of a set of real disparity tuning curves, measured in...

A robotic system implementation that exhibits autonomous learning capabilities of effective control for vergence eye movements is presented. The system, directly relying on a distributed (i.e. neural) representation of binocular disparity, shows a large tolerance to the inaccuracies of real stereo heads and to the changeable environment. The...

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A Human–machine interaction system requires precise information about the user's body position, in order to allow a natural 3D interaction in stereoscopic augmented reality environments, where real and virtual objects should coherently coexist. The diffusion of RGB-D sensors seems to provide an effective solution to such a problem....

Designing an active visual system, able to autonomously learn its behavior, implies to make the learning controller independent of an external signal (e.g. the error between the actual and the desired vergence angle) or of perceptual decisions about disparity (e.g. from the response of a previously trained network). The proposed approach is...

A computational model for the control of horizontal vergence, based on a population of disparity tuned complex cells, is presented. The model directly extracts the disparity-vergence response by combining the outputs of the disparity detectors without explicit calculation of the disparity map. The resulting vergence control yields to stable...

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The ability of a real robot system to interact with the surrounding environment is subordinate to its ability of perceiving it correctly. Since the perception of depth directly relates to the ability of looking at the same point in space with both the cameras, i.e. to verge on a target object, it is essential for the system to gain a proper...

A computational model for the control of horizontal vergence, based on a population of disparity tuned complex cells, is presented. Since the population is able to extract the disparity map only in a limited range, using the map to drive vergence control means to limit its functionality inside this range. The model directly extracts the...

The recent diffusion of the stereoscopic 3D technologies has yielded the development of affordable and of everyday use devices for the visualization of such information. This has paved the way for powerful human and computer interaction systems based on augmented reality environment where humans can interact with both virtual and real tools....

Binocular stereopsis is the ability of a visual system, belonging to a live being or a machine, to interpret the different visual information deriving from two eyes/cameras for depth perception. From this perspective, the ground-truth information about three-dimensional visual space, which is hardly available, is an ideal tool both for...

In the last decade, there has been a rapidly growing development of low-cost and commercial interactive systems, both for professional (e.g. scientific visualization, surgery, rehabilitation), and consumer applications (e.g. 3D cinema and videogames). Moreover, there is a recent interest towards the development of simple and affordable systems...

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Pushed by ample neurophysiological evidence of modulatory effects of motor and premotor signals on the visual receptive fields across several cortical areas, there is growing attention for moving the active vision paradigm from systems in which just the effects of action influence the perception, to systems where the acting itself, and even its...