Visual Cognition and Systems

Group Web Site

[ Professor ] Satoshi Shioiri
Visual Cognition and Systems

[ Associate Professor ] Ichiro Kuriki
Cognitive Brain Functions

[ Associate Professor ] Chia-Huei Tseng
Attention and Learning Systems

[ Assistant Professor ] Yasuhiro Hatori

[ Assistant Professor* ] Sae Kaneko

[ Specially Appointed Assistant Professor* ] Yoshiyuki Sato

[ Research Fellow ] Wu Wei

Research Activities

Human brain is one of the most adaptable systems in the world. Understanding the brain functions is one of the most important issues for evaluating and designing things around us to improve the quality of life. We investigate the brain through visual functions to apply the knowledge to human engineering and image engineering.

Visual Cognition and Systems (Prof. Shioiri)

Modeling the processes of human vision based on the findings of the strategies that the visual system uses, we plan to propose appropriate methods for evaluation of image qualities, efficient way of image presentation and evaluation of visual environments in general. We also investigate dynamic selection process in vision with or without attention to realize prediction system of human perception and action in the future.

Research topics

  • Measurements of spatial and temporal characteristics of visual attention.
  • Modeling control system of eye movements and visual attention
  • Investigation of early, middle and late vision of 3D perception.
The spatial extent of visual attention was measured using two kinds of brain waves: steady state visual evoked potential (SSVEP) and event related potential (ERP). In the case of SSVEP, the attentional effect gradually decreased with the distance from the attended location. In the case of ERP, however, the attentional effect was obtained at the location where visual attention was directed, and information around the attentional locations was suppressed.

Cognitive Brain Functions (Assoc. Prof. Kuriki)

Our perceptual experience arises from neural activities in the brain. Studies of these neural activities are critical for understanding the mechanisms of visual perception. Moreover, displaying visual information in a proper way is crucial in information and communication technology. We believe, understanding cortical representations of visual information improves the efficiency of visual communications. Here we investigate the representation of information (mainly on color) in human visual cortex using brain-activity measurements and analyses in relation to visual perception.

Research topics

  • Representation of color information in human brain
  • Separation and integration of visual information in human brain
Representation of visual information in the early stage of human visual cortex is still unknown. The mechanisms of visual information processing will be investigated by using behavioral studies and functional brain-imaging studies. This study may reveal the “optimal coding method” of the visual information for human brain.

Attention and Learning Systems(Assoc. Prof. Tseng)

My research interests cover the broadly-defined human cognitive functions such as perception, attention, and learning. With psychophysical, neurophysiological, and computational approaches, we try to answer how sensory systems construct a coherent world that we experience and look for applications to enhance human life quality.

Research topics

  • Visual attention mechanisms and models
  • Multi-sensory perception and learning
  • Developmental vision and cognition