| Presentation | 2001/1/20 Size and Distance Perception of Motion Defined Object Based on Vergence Alone Kazuhiro ARITA, Naoaki YAMAMOTO, Osamu TAKIMOTO, Takashi TAKEDA, Takeshi KASAI, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Role of vergence signal in visual size perception has been investigated using a computer generated 3D pattern projection system. Two horizontally separated motion defined object(10cm side)were projected alternately with 48Hz on a large front-parallel transparent screen(2.5m^*2.5m)from behind, which was 50cm from a subject. Wearing a binocular liquid crystal shutter, a subject tried to reproduce the previous motion defined object size with a joy stick, after eithe the size or interobject separation, or both were changed suddenly by the computer. It has been proved that all of the subjects investigated(8 male)perceived shrinking of the object as vergence angle was increased. Thus, the subjects tried to enlarge the object to reproduce the initial objective size. The extent of enlargement depended linearly on the dioptric distance of vergence. However, the size of the enlarged object was much smaller than the value theoretically predicted, and also showed big individual difference(9～109% of theoretical prediction)among subjects. This may imply a possibility that vergence signal alone does not play significant role on many subjects in determining object distance with exceptions of restricted number of subjects. On the other hand, another possibility remains that vergence signal is correctly estimated, while expression of size via the visual system is incorrect. In order to test the role of vergence in determining object distance, subjects were instructed to reproduce initial vergence distance by adjusting the inter-object separation after it together with object size were changed. Those who demonstrated good reproducibility of object size again proved to be able to reproduce vergence distance correctly, while others who had poor reproducibility of size showed poor ability of reproducing the initial vergence distance. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | size perception / distance perception / vergence / binocular vision / motion defined object |
| Paper # | MBE2000-145 |
| Date of Issue |
| Conference Information | |
| Committee | MBE |
|---|---|
| Conference Date | 2001/1/20(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | ME and Bio Cybernetics (MBE) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Size and Distance Perception of Motion Defined Object Based on Vergence Alone |
| Sub Title (in English) | |
| Keyword(1) | size perception |
| Keyword(2) | distance perception |
| Keyword(3) | vergence |
| Keyword(4) | binocular vision |
| Keyword(5) | motion defined object |
| 1st Author's Name | Kazuhiro ARITA |
| 1st Author's Affiliation | Graduate School of Design Engineering, Kyushu Institute of Design() |
| 2nd Author's Name | Naoaki YAMAMOTO |
| 2nd Author's Affiliation | Department of Mechanical Engineering, Nagasaki Institute of Applied Science |
| 3rd Author's Name | Osamu TAKIMOTO |
| 3rd Author's Affiliation | Department of Mechanical Engineering, Nagasaki Institute of Applied Science |
| 4th Author's Name | Takashi TAKEDA |
| 4th Author's Affiliation | Department of Mechanical Engineering, Nagasaki Institute of Applied Science |
| 5th Author's Name | Takeshi KASAI |
| 5th Author's Affiliation | Faculty of Health and Sport Sciences, Osaka University |
| Date | 2001/1/20 |
| Paper # | MBE2000-145 |
| Volume (vol) | vol.100 |
| Number (no) | 599 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |