Concept

Psychophysique

Publications associées (78)

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Two Psychophysical Channels of Whisker Deflection in Rats Align with Two Neuronal Classes of Primary Afferents

Johannes Rüter

The rat whisker system has evolved into in an excellent model system for sensory processing from the periphery to cortical stages. However, to elucidate how sensory processing finally relates to percepts, methods to assess psychophysical performance pertai ...

Society for Neuroscience2006

Audiovisual Gestalts

Pierre Vandergheynst, Gianluca Monaci

This paper presents an algorithm to correlate audio and visual data generated by the same physical phenomenon. According to psychophysical experiments, temporal synchrony strongly contributes to integrate cross-modal information in humans. Thus, we define ...

2006

A Framework for Evaluating Video Object Segmentation Algorithms

Touradj Ebrahimi, Elisa Drelie Gelasca

Segmentation of moving objects in image sequences plays an important role in video processing and analysis. Evaluating the quality of segmentation results is necessary to allow the appropriate selection of segmentation algorithms and to tune their paramete ...

IEEE2006

Full-reference objective quality metrics for video watermarking, video segmentation and 3D model watermarking

Elisa Drelie Gelasca

Quality assessment is a central issue in the design, implementation, and performance testing of all systems. Digital signal processing systems generally deal with visual information that are meant for human consumption. An image, a video, or a 3D model may ...

EPFL2005

Visibility of noise in natural images

Sabine Süsstrunk, Stefan Winkler

The degree of visibility of any kind of stimulus is largely determined by the background on which it is shown, a property commonly known as masking. Many psychophysical experiments have been carried out to date to understand masking of sinusoids or Gabor t ...

2004

Watermarked 3D Object Quality Assessment

Touradj Ebrahimi, Elisa Drelie Gelasca

This work concerns the developing of new perceptual metrics for 3D watermarking quality assessment. Any water- marking algorithm, to be effective, requires that the distortions is inevitably introduces into the watermarked media is imperceptible. This requ ...

2004

Towards Perceptually Driven Segmentation Evaluation Metrics

Touradj Ebrahimi, Elisa Drelie Gelasca

To be reliable, an automatic segmentation evaluation metric has to be validated by subjective tests. In this paper, a formal protocol for subjective tests for segmentation quality assessment is presented. The most common artifacts produced by segmentation ...

IEEE2004

Design of a haptic forceps for microsurgery training

Hannes Bleuler, Roger Gassert, Etienne Burdet, Fei Wang

While feedback of the grasping force is necessary to manipulate objects skillfully, most Virtual Reality systems do not provide such feedback. Grasping an object is often reduced to pushing a button on the interface. This paper presents the design and real ...

2004

Getting the Picture

Michael Herzog

How does the brain build a comprehensible picture of the visible world? Research over recent decades has taught us that the brain does not, in fact, process a given scene as a whole. Instead parts of the brain work independently and in parallel to process ...

2004

Impact of Topology Changes in Video Segmentation Evaluation

Touradj Ebrahimi, Elisa Drelie Gelasca

This work addresses the problem of studying and characterizing topology changes between resulting and reference segmentation masks in video sequences. In particular, the goal of this paper is to examine the impact of individual and combined artifacts found ...

IEEE2004