3D刺激に対する奥行き知覚における刺激サイズの影響と輻輳眼球運動の特徴

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タイトル別名
  • How Vergence Eye Movement and Stimulus Size Affect Depth Perception in Virtual 3D Environment
  • 3D シゲキ ニ タイスル オクユキ チカク ニ オケル シゲキ サイズ ノ エイキョウ ト フクソウガンキュウ ウンドウ ノ トクチョウ

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Recently, we easily access 3-dimensional (3D) entertainments, i.e. 3D broadcastings or 3D cinemas. Stereoscopic visions in humans use binocular and monocular depth cues such as binocular parallax, vergence, lens accommodation, size of visual object, shading, and so on. Strong depth cues, however, may affect human visual systems and it may induce dizziness or headaches. Then it should be very important to know optimal condition of depth cues and interaction within the cues. In this study, we focused on two depth cues;binocular parallax and object size. We investigated how these cues affect depth perception and the interactions of the cues. We stereoscopically presented two visual stimuli on a 3D TV for subjects and they were required to answer which stimulus was presented nearby them. They answered correctly when viewing normal size condition, i. e. nearer stimulus presented larger than the farther one. On the other hand, their performances dropped when they watched illusion-condition stimulus, i.e. farther stimulus presented larger than the nearer one. These results indicate the object size may one of the important factors for stereoscopic depth perception in the virtual 3D environments. The subjects were divided into two groups according to their performance (cutoff was 50% correct). We found vergence eye movements in the lower score subjects were dysfunctional, especially on convergence. Vergence functions may affect depth perception.

収録刊行物

  • 生体医工学

    生体医工学 50 (6), 681-686, 2012

    公益社団法人 日本生体医工学会

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