title: Glasses-free randot stereotest.
abstract: We proposed a glasses-free randot stereotest using a multiview display system. We designed a four-view parallax barrier system and proposed the use of a random-dot multigram as a set of view images for the glasses-free randot stereotest. The glasses-free randot stereotest can be used to verify the effect of glasses in a stereopsis experience. Furthermore, the proposed system is convertible between two-view and four-view structures so that the motion parallax effect could be verified within the system. We discussed the design principles and the method used to generate images in detail and implemented a glasses-free randot stereotest system with a liquid crystal display panel and a customized parallax barrier. We also developed graphical user interfaces and a method for their calibration for practical usage. We performed experiments with five adult subjects with normal vision. The experimental results show that the proposed system provides a stereopsis experience to the subjects and is consistent with the glasses-type randot stereotest and the Frisby–Davis test. The implemented system is free from monocular cues and provides binocular disparity only. The crosstalk of the system is about 6.42% for four-view and 4.17% for two-view, the time required for one measurement is less than 20 s, and the minimum angular disparity that the system can provide is about 23 arc sec.
authors.affiliation: Seoul National University, School of Electrical Engineering, Gwanak-Gu Gwanakro 1, Seoul 151-744, Republic of Korea.
authors.forename: Jonghyun
authors.initials: J
authors.lastname: Kim
authors.affiliation: Seoul National University, School of Electrical Engineering, Gwanak-Gu Gwanakro 1, Seoul 151-744, Republic of Korea.
authors.forename: Jong-Young
authors.initials: JY
authors.lastname: Hong
authors.affiliation: Electronics and Telecommunications Research Institute (ETRI), Broadcasting & Telecommunications Media Research Laboratory, 218 Gajeong-ro, Yuseong-gu, Daejeon 305-700, Republic of Korea.
authors.forename: Keehoon
authors.initials: K
authors.lastname: Hong
authors.affiliation: Seoul National University Bundang Hospital, Department of Ophthalmology, 300, Gumi-dong, Bundang-gu, Seongnam, Gyeonggi-do 463-707, Republic of Korea.
authors.forename: Hee Kyung
authors.initials: HK
authors.lastname: Yang
authors.affiliation: Kangwon National University Hospital, Department of Ophthalmology, 156 Baengnyeong-ro, Chuncheon, Kangwon 200-722, Republic of Korea.
authors.forename: Sang Beom
authors.initials: SB
authors.lastname: Han
authors.affiliation: Seoul National University Bundang Hospital, Department of Ophthalmology, 300, Gumi-dong, Bundang-gu, Seongnam, Gyeonggi-do 463-707, Republic of Korea.
authors.forename: Jeong-Min
authors.initials: JM
authors.lastname: Hwang
authors.affiliation: Seoul National University, School of Electrical Engineering, Gwanak-Gu Gwanakro 1, Seoul 151-744, Republic of Korea.
authors.forename: Byoungho
authors.initials: B
authors.lastname: Lee
mesh_terms: D000328:Adult; D003867:Depth Perception / Q000502:physiology*; D004867:Equipment Design; D006801:Humans; D014584:User-Computer Interface; D014787:Vision Tests / Q000295:instrumentation* / Q000379:methods*