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Higher-Order Visual Information Lab
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The lab uses experiments and models to uncover how human vision works.
AboutAbout the lab
Uncovering what people see and how human vision works
The Higher-Order Visual Information Lab studies what people see and how vision works.
Centered on psychophysical experiments that examine the characteristics of human vision, the lab also uses brain function measurement and computer vision methods.
The lab builds models of spatial perception, 3D perception, and the mechanisms of attentional selection, aiming at applications in ergonomics and image engineering.
The lab works on predicting how appearance changes with the environment, just as the same piece of colored paper looks a different color depending on its surroundings.
Key terms
- Psychophysical experiments
- Experiments that examine how people perceive stimuli while the way the stimuli are presented is varied
- SSVEP (steady-state visual evoked potential)
- A response that appears in the EEG in sync with a flickering stimulus when a person views it
- ERP (event-related potential)
- A response that appears in the EEG in time with a specific event, such as seeing a stimulus. P3 is one of its components
- Saccadic suppression of image displacement
- The reduced ability to notice changes in the position of objects in the visual field when the eyes move quickly
ResearchResearch themes
The human brain works through mechanisms that adapt flexibly to the environment. By exploring brain function through the workings of vision, the lab builds models of the strategies the brain uses in stereopsis, motion perception, and color perception, and works to clarify the dynamic characteristics of attentional selection.
*Illustrative imageMeasuring the spread of attention with EEG
The lab recorded EEG while participants viewed visual stimuli and measured the effects of attention at multiple locations simultaneously to determine the spread of attention. With SSVEP, the effect weakened with distance from the attended location, whereas the P3 component of the ERP showed a large effect only at the attended location, and information around it was, if anything, suppressed.
*Illustrative imageHow the world looks stable even when the eyes move
The visual world does not appear to move when the eyes move. One explanation is saccadic suppression of image displacement, but this study suggested that processing that responds selectively to luminance transient signals is involved as a new process for stabilizing the visual field during eye movements.
MembersFaculty
- ProfessorKowa Koida
- ProfessorChia-huei Tseng
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Optical Illusion” Ironnail / CC BY-SA 4.0 (cropped)
- Measuring the spread of attention with EEG: “EEG Recording Cap” Chris Hope / CC BY 2.0 (cropped)
- How the world looks stable even when the eyes move: “Eye iris” che (Please credit as "Petr Novák, Wikipedia" in case you use this outside Wikimedia projects.) / CC BY-SA 2.5 (cropped)
- Related lab (Sound Information Science Lab): “Anechoic chamber-1” Togabi / CC BY-SA 4.0 (cropped)
- Related lab (Image Analysis Lab): “Optical Sensor” QueSera4710 / CC BY-SA 3.0 (cropped)
- Related lab (Information Content Lab): “Reality check ESA384313” European Space Agency / CC BY-SA 3.0 igo (cropped)
- Related lab (Intelligent Control Systems Lab): “Stanford Cart and Hydraulic Arm ( )” Don DeBold from San Jose, CA, USA / CC BY 2.0 (cropped)
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