Head-Mounted Display(HMD) 시청 환경에서 양안 밝기 차이에 따른 피로도 - 감각성 우세안을 중심으로

김효선(Kim, Hyosun),서영준(Seo, Young-Jun),조성찬(Jo, Sung-Chan) 한국색채학회 2021 한국색채학회 논문집 Vol.35 No.2

Since both stereoscopic devices and Head-Mounted Displays (HMDs) use the diplopic projection which the separate images are presented on the left- and right-eye, it is revealed that the difference of binocular images caused the visual fatigue. In addition, the interocular imbalance, especially the sensory eye dominance, can also be connected with the visual fatigue by the photometric asymmetry of the binocular images. The purpose of this study is to investigate how the brightness asymmetry between the binocular images affect the visual fatigue and to explore how the sensory dominance affects visual fatigue. Wearing HMDs, participants were asked to view binocular images: one had 100% brightness, the other 50~90% brightness. They evaluated the visual fatigue on a 7-point Likert scale. As the result, an increase in brightness asymmetry between viewers’ left-eye and right-eye increased the visual fatigue scores. The relationship between the sensory dominance and the visual fatigue by the brightness asymmetry was different depending on the type of image. The visual fatigue increased as the brightness of images, which entering to the sensory dominant eye, decreased in the case of the black-and-white images. On the contrary, the visual fatigue was not changed in the case of color images in the same condition. This meant that the brightness contrast and color contrast had different effect on the visual fatigue. Overall, we suggest that the brightness asymmetry of less than 30% is suitable for a comfortable and positive viewing experience.

Development of Training Instruments on Visual functions using HMD type Display and Investigation of its Demand

Lee, Seong Jae,Oh, Se Hyun The International Promotion Agency of Culture Tech 2018 International Journal of Advanced Culture Technolo Vol.6 No.3

We constructed 3-D images by HMD (Head Mount Display) type and polarization technique through which a training instrument of binocular function based on clinical vision therapy was developed and investigated its demand. To design the instrument that performs Test- Diagnosis - (Prescription) - Training - Treatment we provided a customized training method for the trainers using optical IT instruments of binocular test. Through the contents and the instruments of the vision therapy technology developed in this work we can replace the current vision test instruments to those costing 60% lower price in eye clinics and eye glasses shops. By replacing the existing vision test instruments it is possible to create a new market of the vision therapy in vision training instruments.

Development of Training Instruments on Visual functions using HMD type Display and Investigation of its Demand

이성재,오세현 국제문화기술진흥원 2018 International Journal of Advanced Culture Technolo Vol.6 No.3

We constructed 3-D images by HMD (Head Mount Display) type and polarization technique through which a training instrument of binocular function based on clinical vision therapy was developed and investigated its demand. To design the instrument that performs Test– Diagnosis - (Prescription) – Training - Treatment we provided a customized training method for the trainers using optical IT instruments of binocular test. Through the contents and the instruments of the vision therapy technology developed in this work we can replace the current vision test instruments to those costing 60% lower price in eye clinics and eye glasses shops. By replacing the existing vision test instruments it is possible to create a new market of the vision therapy in vision training instruments.

Development of Training Instruments on Visual functions using HMD type Display and Investigation of its Demand

Seong Jae Lee,Se Hyun Oh 국제문화기술진흥원 2018 International Journal of Advanced Culture Technolo Vol.6 No.3

We constructed 3-D images by HMD (Head Mount Display) type and polarization technique through which a training instrument of binocular function based on clinical vision therapy was developed and investigated its demand. To design the instrument that performs Test– Diagnosis - (Prescription) – Training - Treatment we provided a customized training method for the trainers using optical IT instruments of binocular test. Through the contents and the instruments of the vision therapy technology developed in this work we can replace the current vision test instruments to those costing 60% lower price in eye clinics and eye glasses shops. By replacing the existing vision test instruments it is possible to create a new market of the vision therapy in vision training instruments.

단안카메라 기반 삼차원 입체영상 증강현실

노승민(Seungmin Rho),이진우(Jinwoo Lee),황재인(Jae-In Hwang),김준호(Junho Kim) 한국컴퓨터그래픽스학회 2016 한국컴퓨터그래픽스학회 학술대회 Vol.2016 No.7

본 논문은 모바일 기반 양안식 HMD 기기를 사용하는 마커기반의 증강현실 시나리오에서 단안영상으로부터 삼차원 입체영상을 생성하는 효과적인 기법을 제안한다. 모바일 기기의 단안카메라로는 좌안과 우안에 대해 정확한 양안시차를 제공하는 양안영상을 생성할 수 없기 때문에, 기존의 양안식 증강현실 시스템에서는 좌안과 우안에 동일한 실세계 영상을 제공하여 입체감과몰입감이떨어지는문제점이있다.본논문에서는마커기반의증강현실시나리오에서대부분의사용자들이마커를 주시한다는 가정 하에, 기존 방법에 비해 높은 입체감과 시각적 편안함을 제공하는 단안카메라 기반 3차원 입체영상 생성기법을 제안한다. 마커와 카메라의 3차원 자세정보를 통해 단안영상을 3차원 공간상에 나타내고, 사용자의 좌안과 우안에 해당하는 가상의 두 카메라를 통해 단안영상의 마커영역과 마커 위에 증강될 가상물체에 대해서 시차를 계산한다. 마커 이외의 영역은 블러 효과를 적용하여 선명도를 낮추고 양안식 HMD를 통해 입체 콘텐츠를 감상할 때 발생하는 시각적인 피로를 감소시킨다.본 논문에서 제안하는 방법으로 생성된 3차원 입체영상이 기존방법에 비해 높은 입체감을 제공하는지 여부를 세가지의 사용자 실험을 통해 평가하였다. 실험결과,본 논문에서 제안하는 방법이 기존방법에 비해 높은 입체감을 제공하고 시각적인 피로가 크지 않는다는 것, 사람의 시차와 동일한 스테레오 카메라를 통해 촬영된 영상과 유사한 현실감을 사용자에게 제공한다는 것, 그리고 영상블러를 통해 사용자의 시각적인 피로도가 감소되었다는 사실을 확인하였다. This paper introduces an effective method for generating 3D stereoscopic images that gives immersive 3D experiences to viewers using mobile-based binocular HMDs. Most of previous AR systems with monocular cameras have a common limitation that the same real-world images are provided to the viewer’s eyes without parallax. In this paper, based on the assumption that viewers focus on the marker in the scenario of marker based AR, we recovery the binocular disparity about a camera image and a virtual object using the pose information of the marker. The basic idea is to generate the binocular disparity for real-world images and a virtual object, where the images are placed on the 2D plane in 3D defined by the pose information of the marker. For non-marker areas in the images, we apply blur effects to reduce the visual discomfort by decreasing their sharpness. Our user studies show that the proposed method for 3D stereoscopic image provides high depth feeling to viewers compared to the previous binocular AR systems. The results show that our system provides high depth feelings, high sense of reality, and visual comfort, compared to the previous binocular AR systems.

단안카메라 기반 삼차원 입체영상 증강현실

노승민(Seungmin Rho),이진우(Jinwoo Lee),황재인(Jae-In Hwang),김준호(Junho Kim) 한국컴퓨터그래픽스학회 2016 컴퓨터그래픽스학회논문지 Vol.22 No.3

본 논문은 모바일 기반 양안식 HMD 기기를 사용하는 마커기반의 증강현실시나리오에서 단안영상으로부터 삼차원 입체영상을 생성하는 효과적인 기법을 제안한다. 모바일 기기의 단안카메라로는 좌안과 우안에 대해 정확한 양안시차를 제공하는 양안영상을 생성할 수 없기 때문에, 기존의 양안식 증강현실 시스템에서는 좌안과 우안에 동일한 실세계 영상을 제공하여 입체감과몰입감이떨어지는문제점이있다.본논문에서는마커기반의증강현실시나리오에서대부분의사용자들이마커를 주시한다는 가정 하에, 기존 방법에 비해 높은 입체감과 시각적 편안함을 제공하는 단안카메라 기반 3차원 입체영상 생성기법을 제안한다. 마커와 카메라의 3차원 자세정보를 통해 단안영상을 3차원 공간상에 나타내고, 사용자의 좌안과 우안에 해당하는 가상의 두 카메라를 통해 단안영상의 마커영역과마커 위에 증강될 가상물체에 대해서 시차를 계산한다.마커 이외의 영역은 블러 효과를 적용하여 선명도를 낮추고 양안식 HMD를 통해 입체 콘텐츠를 감상할 때 발생하는 시각적인 피로를 감소시킨다.본논문에서제안하는 방법으로 생성된 3차원 입체영상이 기존 방법에 비해 높은 입체감을 제공하는지 여부를 세가지의 사용자 실험을 통해 평가하였다. 실험결과,본 논문에서 제안하는 방법이 기존방법에 비해 높은 입체감을 제공하고 시각적인 피로가 크지 않는다는 것, 사람의 시차와 동일한 스테레오 카메라를 통해 촬영된 영상과 유사한 현실감을 사용자에게 제공한다는 것, 그리고 영상블러를 통해 사용자의 시각적인 피로도가감소되었다는 사실을 확인하였다. This paper introduces an effective method for generating 3D stereoscopic images that gives immersive 3D experiences to viewers using mobile-based binocular HMDs. Most of previous AR systems with monocular cameras have a common limitation that the same real-world images are provided to the viewer’s eyes without parallax. In this paper, based on the assumption that viewers focus on the marker in the scenario of marker based AR, we recovery the binocular disparity about a camera image and a virtual object using the pose information of the marker. The basic idea is to generate the binocular disparity for real-world images and a virtual object, where the images are placed on the 2D plane in 3D defined by the pose information of the marker. For non-marker areas in the images, we apply blur effects to reduce the visual discomfort by decreasing their sharpness. Our user studies show that the proposed method for 3D stereoscopic image provides high depth feeling to viewers compared to the previous binocular AR systems. The results show that our system provides high depth feelings, high sense of reality, and visual comfort, compared to the previous binocular AR systems.