大きな奥行きの知覚における運動視差と両眼網膜像差の相互作用の頭部運動方向依存性  [in Japanese] Effects of Observer's Head-motion Direction on Integration of Motion Parallax and Binocular Disparity for Large Depth  [in Japanese]

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Author(s)

    • 玉田 靖明 Tamada Yasuaki
    • 北九州市立大学 大学院国際環境工学研究科 Graduate School of Environmental Engineering, University of Kitakyushu
    • 佐藤 雅之 Sato Masayuki
    • 北九州市立大学 大学院国際環境工学研究科 Graduate School of Environmental Engineering, University of Kitakyushu

Abstract

両眼網膜像差と運動視差は有効な奥行き手がかりであるが,大きすぎる視差は二重像や運動の知覚を生じさせてしまい,かえって奥行きを減少させてしまう.しかし,二重像が生じるような大きな網膜像差と運動視差を同時に呈示することで非常に大きな奥行きが知覚されることが知られている.本研究では,この立体視の促進効果の頭部運動方向依存性について検討した.固視点付近に呈示される小さなディスクに,網膜像差,運動視差,あるいはその両方を与えた.被験者は,固視点からディスクまでの奥行きをマッチングにより応答した.頭部を左右方向または前後方向に動かした場合に知覚される奥行きを比較した.実験1では頭部,実験2では刺激の運動範囲を等しくした.両実験において,左右方向の運動条件では立体視の促進効果が生じたが,前後方向の条件では生じなかった.このことは,立体視の促進効果が左右方向の運動に固有であることを示唆する.

Although binocular disparity and motion parallax are effective cues to depth, the effective ranges of these cues are not large. An excessive disparity or motion parallax causes the percept of diplopia or motion and degrades the apparent depth. However, simultaneous presentation of very large disparity and motion parallax causes a vivid depth perception with the percept of diplopia and motion. We compared the perceived depth for lateral head movement with that for sagital one to examine whether the facilitation of stereopsis depends on the direction of the observer's head movement. A small disk was presented 2.5 deg above or below the fixation point with disparity and/or motion parallax. Eleven observers estimated the depth of the target relative to the fixation point, Using a matching method. In experiment 1 the range of head movement was 13 cm. In experiment 2 the ranges of lateral and sagital head movement were 1.8- and 50- cm respectively, so that the ranges of stimulus motion were equalized to 1 deg. The results of these experiments showed that the facilitation occurs for lateral but not for sagital movement, suggesting that the facilitation of stereopsis is specific to the lateral stimulus motion.

Journal

  • The Journal of The Institute of Image Information and Television Engineers

    The Journal of The Institute of Image Information and Television Engineers 66(6), J182-J187, 2012

    The Institute of Image Information and Television Engineers

Keywords

Codes

  • NII Article ID (NAID)
    130002111329
  • Text Lang
    JPN
  • ISSN
    1342-6907
  • Data Source
    J-STAGE 
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