2022 Fiscal Year Final Research Report

A study on the cooperative effect of motion parallax and binocular disparity and its application to 3D displays

Research Project

PDF

Project/Area Number	20K11919
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Review Section	Basic Section 61020:Human interface and interaction-related
Research Institution	The University of Tokushima
Principal Investigator	MIZUSHINA Haruki 徳島大学, ポストLEDフォトニクス研究所, 講師 (20389224)
Co-Investigator(Kenkyū-buntansha)	陶山史朗宇都宮大学, オプティクス教育研究センター, 特任教授 (70457331)
Project Period (FY)	2020-04-01 – 2023-03-31
Keywords	運動視差 / 奥行き知覚 / 両眼視差 / 書き割り効果 / 両眼立体視 / 垂直変位視差 / 両眼融合 / 3D表示
Outline of Final Research Achievements	Conventional stereoscopic 3D displays have problems such as perceived distortion of 3D shapes and difficulty in depth perception when there is a mismatch between the retinal images of the left and right eyes. In this study, we considered motion parallax not only as a depth perception cue but also as an effect that works in cooperation with binocular disparity to promote binocular stereopsis, and conducted experiments to demonstrate this. We found that when the images presented to the left and right eyes have vertical displacement disparity or the size of the left and right retinal images differed, adding motion parallax corresponding to the depth that matched binocular disparity improved the degradation and instability of depth perception. In addition, we found that the addition of motion parallax to binocular disparity can improve cardboard effect in stereoscopic 3D displays.
Free Research Field	視覚心理物理学
Academic Significance and Societal Importance of the Research Achievements	学術的意義としては，これまでにも両眼視差が大きすぎて知覚できないような大きな奥行きの知覚が運動視差によって促進されるなどの報告があったが，さらに本研究では両眼網膜像のミスマッチ（左右眼の像の垂直方向のずれや大きさの違い）によって引き起こされる奥行き知覚の劣化や書き割り効果などの空間知覚の歪みが，運動視差を付加することで改善されることを示し，奥行き知覚における運動視差の重要性をさらに明確にした．社会的意義としては，3Dディスプレイにおいて所望の奥行きを安定して知覚させるための要件として，両眼視差に加えて適切な運動視差を提示する必要性を示し，今後の3D表示の普及をサポートするデータを提供した．