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Visual Cognition and Systems

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Visual Cognition and Systems

Researcher

高次視覚情報システム研究室01
  • [ Professor ]
    Satoshi Shioiri
  • [ Associate Professor ]
    Chia-Huei Tseng
  • [ Assistant Professor ]
    Yasuhiro Hatori
  • [ Assistant Professor* ]
    Sai Sun
  • [ Specially Appointed Assistant Professor* ]
    Yoshiyuki Sato
  • [ Associate Professor (cross appointment, Hokkaido University) ] Sae Kaneko

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.

In our psychophysical experiment, an observer watched visual stimuli through a half mirror. To isolate hand location information through proprioception from vision, we made the hand invisible to the observer. This left the proprioceptive signals only for an observer to know one’s hand location. To isolate the hand proximity effect from top-down attention, the location of the target stimulus, where top-down attention directed to, was fixed at a fixed location during each experimental block. To exclude effect from hand action to respond, we did not use reaction time experiment but instead the flash lag effect (FLE). The FLE is a phenomenon that occurs when a flash aligned with a moving object is perceived to lag behind that object, and attention reduces the amount of the FLE. We measured and compared the FLE when a stimulus was at the hand location and when it was at the other side of the display. Smaller FLE was expected with a hand nearby because attention is known to reduce FLE.

Attention and Learning Systems(Assoc. Prof. Tseng)

Research topics

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

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.

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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