Spatio-temporal Analysis of Feature-Based Attention

Spatio-temporal analysis of feature-based attention.

The cortical mechanisms of feature-selective attention to color and motion cues were studied in humans using combined electrophysiological, magnetoencephalographic, and hemodynamic (functional magnetic resonance imaging) measures of brain activity. Subjects viewed a display of random dots that periodically either changed color or moved coherently. When attention was directed to the color change...

Spatio-temporal Feature Classifier

Different from current foreground and background segmentation methods, we did not utilize the low level image representation method (such as boundaries and textures) to extract the feature of the videos, instead we proposed a spatio-temporal feature classifier to obtain the union region of object from natural videos as the interest points. We slide the temporal chunk along time axis to obtain s...

Spatio-Temporal Ontologies and Attention

This paper presents a new proposal for the design of spatio-temporal ontologies which has its origin in cognitively motivated spatial semantics. It is shown that selective attention not only plays a central role in the characterization of spatial relations but that the representation of attentional aspects also leads to the possibility of defining an ontological upper structure which systematic...

Attention modulates spatio-temporal grouping

Dynamic stimuli are ubiquitous in natural viewing conditions implying that grouping operations need to operate, not only in space, but also jointly in space and time. Moreover, in natural viewing, attention plays an important role in controlling how resources are allocated. We investigated how attention interacts with spatio-temporal perceptual grouping by using a bistable stimulus, called the ...

Spatio-temporal analysis of snow cover in Iran based on topographic characteristics