| id |
24eaea2001 |
| authors |
Ohno, R., Katayama, M., Komatsuzaki, T. and Soeda, M. |
| year |
2002 |
| title |
Development of a Visual Simulation System Synchronized with Walking Motion - An application for a study of distance perception |
| source |
Environmental Simulation - New Impulses in Planning Processes [Proceedings of the 5th European Architectural Endoscopy Association Conference / ISBN 3-922602-85-1] |
| summary |
Conventional visual simulators allow observers to move in the simulated space by using a mouse or a joy-stick without the kinesthetic feeling of motion. However, the link between visual image and body motion is important to perceive the environment, especially when people are walking. In this paper, a visual simulation system was designed to synchronize the subject's walking motion on a treadmill with the video image shown on a HMD. In order to detect the walking motion, sensors were attached to both subject’s ankles. According to the detected motion, the treadmill rotates and a CCD camera moves in a model space. Because of the sensors’ low sensitivity and the time lag between the detected motion and treadmill rotation, the subjects couldn’t walk smoothly. Therefore, the walking speed which synchronizes with the video image was kept constant for each subject and the experimenter started up and stopped the simulator. The validity of this simulation system was examined by comparing the accuracy of distance estimation using the new simulator with that using the conventional system without walking motion. The “distance reproduction” method was applied to measure the perceived distance: subjects walked 25 meter in a real setting without being told the distance, and were asked to move the same distance in different conditions. Since the distance estimation became accurate in the condition with the walking motion, the validity of this simulator was secured. The following experiment was intended to investigate the influence of physical environmental features on perceived distance by using the simulation system. We operated some features using a scale model of a route and examined their influences. Subjects were asked to "walk" through a path consisted of two spaces with different physical features, and to respond by showing the proportion of the length of those two spaces. The result revealed that the distance of a narrower and lower ceiling path where people perceive clearer line perspective and faster optical flow tends to be perceived longer. |
| series |
EAEA |
| email |
|
| more |
http://info.tuwien.ac.at/eaea |
| full text |
 file.pdf (191,509 bytes) |
| references |
Content-type: text/plain
|
Gibson J. J. (1979)
 The Ecological Approach to Visual Perception
, Boston Houghton Milfflin, p. 23
|
|
|
|
|
Montello D. R. (1991)
The Measurement of Cognitive Distance
, Methods and Construct Validity, Journal of Environmental Psychology, p.101-122
|
|
|
|
|
Okabe A. (1986)
Distance and Direction Judgment in a Large-Scale Natural Environment
, Effects of a Slope and Winding Trail, Environment and Behavior, Vol.18, No.6, p.755-772
|
|
|
|
|
Sadalla E. K. (1980)
The Perception of Traversed Distance
, Environment and Behavior, Vol.12, No.1, p.65-79
|
|
|
|
|
Staplin L. J. (1980)
An Information Storage Model for Distance Cognition
, Environment and Behavior, Vol.12, No.2, p.183-193
|
|
|
|
| last changed |
2005/09/09 10:43 |
|
