The Perceptive Workbench endeavors to create a spontaneous and unimpeded interface between the physical and virtual worlds. Its vision-based methods for interaction constitute an alternative to wired input devices and tethered tracking. Objects are recognized and tracked when placed on the display surface. By using multiple infrared light sources, the object’s 3D shape can be captured and inser...

This paper analyzes how performance of a basic teleoperation task are influenced by the viewpoint of the video feedback, using a remote mobile robot. Specifically, the viewpoint is varied in terms of height and tilt and the influence on a basic task, such as following some pre-defined paths, is analyzed. The operators are able to control one motor degree of freedom and up to two perceptive degr...

The Perceptive Workbench enables a spontaneous and unimpeded interface between the physical and virtual worlds. It uses vision-based methods for interaction that eliminate the need for wired input devices and wired tracking. Objects are recognized and tracked when placed on the display surface. Through the use of multiple infrared light sources, the object's 3D shape can be captured and inserte...

The Perceptive Workbench enables a spontaneous, natural, and unimpeded interface between the physical and virtual world. It is built on vision-based methods for interaction that remove the need for wired input devices and wired tracking. Objects are recognized and tracked when placed on the display surface. Through the use of multiple light sources, the object’s 3D shape can be captured and ins...

Anterior lenticonus is a rare condition in which there is a conical forward protrusion of the axial portion of the anterior capsule of the lens and anterior cortex which usually remains clear. The nucleus is not involved, indicating that the anomaly develops relatively late. Males are more commonly affected than females and in most cases both eyes are involved. Some of the cases reported in the...

For a period of 10 months, the perceptive-motor skills of golden hamsters were tested as part of an experiment to investigate vestibular controlled behaviour. We found that four out of 40 hamsters had more difficulties with swimming and equilibrium maintenance than the rest of the group. These disturbances either were apparent during the first months of testing or developed at a later period. I...

The present article is the fruit of part of an ethnographic research that I have carried out at an Italian hospital in order to analyze how cognition goes on in a surgical team. The paper has two main points: the distinction between two kinds of epistemic action specifically devoted to construct representations in interaction with the environment and a reflection about the possible influences o...

In this paper, the perceptive user, who could identify the high-quality objects in their initial lifespan, is presented. By tracking the ratings given to the rewarded objects, we present a method to identify the user perceptibility, which is defined as the capability that a user can identify these objects at their early lifespan. Moreover, we investigate the behavior patterns of the perceptive ...

An agent moving in a real environment perceives it by numerous noisy sensors which provide some high dimensionality data with unknown topology. In order to interact in this complex and changing environment, according to the active perception theory, the agent needs to learn the correlations between its actions and the changes they induce in the environment. In the perspective of a bio-inspired ...

The traditional Bayesian estimator of short-time spectral amplitude is based on the minimization of the squared-error cost function under the common Gaussian probability density function (pdf). The Gaussian distribution, however, is not the optimal probability distribution. To overcome this phenomenon, we considered to replace the traditional distribution hypothesis of spectral amplitude of spe...