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Visual Cognition and Systems

>> Human and Bio Information Systems Division

Visual Cognition and Systems

Researcher

  • [ Professor ]
    Satoshi Shioiri
  • [ Associate Professor ]
    Chia-Huei Tseng
  • [ Assistant Professor* ]
    Sai Sun

Group Web Site

https://sites.google.com/view/tohoku-vision/ホーム?authuser=3

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)

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.

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.

Attention and Learning Systems(Assoc. Prof. Tseng)

Research topics

  • Visual attention mechanisms and models
  • Multi-sensory perception and learning

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.

Attentional effects are known to include top-down attention, which is directed consciously, and bottom-up attention, which is directed to salient stimuli such as bright objects. In contrast, attentional effects on stimuli around the hand are also known to exist, but their relationship to top-down and bottom-up attention is unclear. We found that there is an attentional effect on the goal position even when top-down attention is directed to a location different from the goal position of the hand movement. We also found that the spread of attention measured by electroencephalography differed significantly between the hand movement goal position and the top-down attention position, indicating that the two are due to different mechanisms. Attentional mechanisms at the goal position of hand movement are different from top-down attention.
Interpersonal communication can be carried out in various forms such as side-by-side walking synchronization, body movements, and facial expressions. We used motion acceleration sensors and trackers, together with psychophysical methods to investigate how implicit signals are communicated.

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