• 한국멀티미디어학회논문지
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• 제23권5호
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• pp.721-727
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• 2020

The change in 21st century imaging media technology is changing our modern visual system. Virtual reality HMD devices, one of the core technologies of 5G, reproduce the new visual system. However, there is a lack of analysis and understanding of the visual operating system to understand the visual system of the fast-changing variety of imaging media. This study analyzed the three visual systems appearing in the recent imaging media art area and presented an engineering perspective algorithm for its procedures and methods. Through these results, we want to build algorithms that understand the visual system of virtual reality HMD devices.

• 융복합기술연구소 논문집
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• 제2권2호
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• pp.5-12
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• 2012

Recently, peoples are suffering from various psychological disorders such as addiction, phobia, depression, and bipolar disorder. Moreover, children with ADD/ADHD and autism are increasing. Korean tends to regard the psychological disorders as taboo. Therefore, it is unusual case that the mental patient gets the psychological therapy. Virtual reality has come to the spotlight as a useful tool for the therapy due to its anonymity and easy accessibility. The therapy in the virtual reality is called cyber-therapy. Emotion of the patient is important for the treating process. The objective of this paper is to review the researches on the treatment of psychological disorders using the virtual reality and prospect the affective interaction technology for the cyber-therapy.

• 한국응급구조학회지
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• 제23권3호
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• pp.145-154
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• 2019

Purpose: This study simulates cardiac arrest situations in 360° virtual reality video clips and general video clips, and compares the correlations between educational media and experience recognition. Methods: Experimental research was carried out on a random control group (n=32) and experimental group (n=32) on March 20, 2019. Results: The groups where participants were trained with the 360° virtual reality video clips and a higher score of experience recognition (p=.047) than the group where participants were trained with the general video clips. Moreover, the subfactors of experience recognition including the sense of presence and vividness (p=.05), immersion (p<.05). experience (p<.01), fantasy factor (p<.05). and content satisfaction (p<.05) were positively correlated. Conclusion: Enhancing vividness and the sense of presence when developing virtual reality videos recorded with a 360° camera is thought to enable experience recognition without any direct interaction.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2014년도 추계학술대회
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• pp.549-550
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• 2014

21세기 현대사회는 다양한 가상현실 미디어에 둘러싸여있다. 영화, 드라마, 광고 등 대부분의 영상에 거의 필수적으로 컴퓨터 그래픽 작업이 들어가며, 가상현실의 대표적인 콘텐츠인 게임의 경우 100억 달러 규모의 거대 시장이 형성되어있다. 단순히 오락적 요소로만 여겨지던 이 가상현실이, 최근에는 교육과 연계되어 연구되기 시작했다. 한국인의 교육열은 세계적으로 유명하고, 특히 영어교육에는 한 해 평균 19조원을 투자할 정도로 영어 교육에 관심이 많다. 그러나 대부분의 한국인들은 여전히 영어를 어려워한다. 본 논문에서는 가상현실의 몰입감과 체험이라는 특징을 영어교육과 접목하여 교육의 효과를 높이기 위한 콘텐츠를 기획하고 Eon Studio툴을 이용하여 개발한 영어교육게임을 제안한다.

• International Journal of Internet, Broadcasting and Communication
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• 제11권2호
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• pp.43-49
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• 2019

Nowadays, one-person media broadcasting has become popular, and with the progress of this popularity, multimedia techniques which can support such broadcasting are also becoming more and more advanced. One of the most emerging multimedia technique used in this field is the virtual reality technology which sets the one-person media broadcasting environment as a virtual reality environment. However, as such an environment requires instruments of high cost, it is not easy for normal individuals to constitute such environments. Therefore, in this paper we propose how to construct virtual reality-like panoramas with a multiple of smartphones. For this purpose, we designed a special rig which can hold firmly 8 smartphone cameras which have overlapping view of the environment such that panorama stitching becomes possible. To reduce the computation cost, we precomputed the homography matrices, and used 1-D pointer structures to store the computed coordinate values.

• 한국멀티미디어학회논문지
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• 제24권11호
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• pp.1560-1566
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• 2021

Cyber Sickness, which occurs when using Virtual Reality contents, is the most serious problem in immersive Virtual Reality contents. The purpose of this study is to identify the effects and causes of graphic environmental factors on Cyber Sickness in Virtual Reality contents. To this end, cyber sickness experiments were conducted according to the light source and material settings, which are most commonly used in graphical environmental elements. Cyber Sickness measurements were based on the Simulator Sickness Question(SSQ) tool to derive an index that causes Cyber Sickness As a result of the analysis, the smaller the surface roughness, the higher the degree of Cyber Sickness, and the smaller the surface roughness, the smoother the surface of the 3D object, and many specular reflections from the light source occurred, which was confirmed to be the cause of great Cyber Sickness.

• 대한물리치료과학회지
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• 제24권3호
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• pp.1-11
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• 2017

Purpose: The purpose of this study was to investigate the effects of virtual reality based treadmill training on muscle architecture of gastrocnemius in chronic stroke patients. Methods: Thirty chronic stroke patients were randomly assigned to either the virtual reality based treadmill training (VRTT) group (n=15) or treadmill training (TT) group (n=15). Both groups participated in a standard rehabilitation program; in addition, the VRTT group participated in virtual reality based treadmill training for 30 minutes per day, three times per week, for 6 weeks, and TT group participated in treadmill walking training for 30 minutes per day, three times per week, for 6 weeks. Ultrasound image was used for measurement of pennation angle and muscle thickness of the medial gastrocnemius muscle at rest and during maximum voluntary contraction. Results: In the paretic side medial gastrocnemius muscle, greater improvement on the pennation angle and muscle thickness while resting and maximal voluntary contraction were observed in the VRTT group compared with the TT group. Conclusion: Findings of this study demonstrated that the virtual reality based treadmill training has an effect on muscle architecture of medial gastrocnemius in chronic stroke patients.

• 대한의용생체공학회:의공학회지
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• 제38권6호
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• pp.336-341
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• 2017

The aim of this study is to determine the effect of virtual reality(VR) exercise using XBOX $Kinect^{TM}$ on the scoliometer angle and muscle activities of the trunk. The subjects of the study were 13 young adults who devided into a virtual reality-based exercise group(VREG, n = 7) and a traditional stabilization exercise group(TSEG, n = 6). The VREG received virtual reality game for 5 days a weeks, 30 minutes a day, for a 2 weeks and the TSEG received general trunk stabilization exercise for the same period and frequency. The subjects were measured and compared for muscle activities of trunk stabilization before and after the program. VREG tend to decrease more than TSEG in scoliometer angle. In addition, VREG showed a significant decrease in muscle activities of multifidus. This study presents the impact of virtual reality-based exercise program on trunk balance and stabilization. The following studies need customized programs for subjects that trunk balance and stabilization is required.

• 한국정보통신학회논문지
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• 제14권6호
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• pp.1482-1487
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• 2010

최근 들어 가상현실 기술을 이용한 제품과 컨텐츠들이 급속히 확산되고 있다. 가상현실 기술을 이용한 시각화는 사용자에게 극대화 된 몰입감을 제공함으로써 기존의 시각화 기법과는 차별화 된 경험을 제공한다. 본 논문에서는 가상현실 기술을 이용한 새로운 입체영상의 시각화 기법을 제안하고, 이에 대한 활용가능성에 대해 논의한다. 시각화 기법은 사용자에게 최대한의 몰입감을 제공할 수 있도록 두 개 이상의 스크린으로 구성된 멀티스크린 환경의 후면투사방식을 지원하는 입체 영상 구현시스템으로 구성하였다. 이를 통해 사용자들은 더욱 높은 수준의 몰입감을 느끼며, 가상현실을 경험할 수 있을 것이다. 또한 본 연구에서 제안한 시스템은 가상현실 전시, 공연, 게임, 교육훈련 등 다양한 산업분야에서 활용될 수 있을 것이다.

• 품질경영학회지
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• 제48권3호
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• pp.433-451
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• 2020

Purpose: The purpose of this study is to investigate how the type of virtual reality content production affects the interaction and immersion that is a virtual reality characteristic, and to provide the platform companies and content producers with the basic information necessary to provide the production and service of content suitable for VR characteristics. Methods: Based on the data collected in the survey, multiple regression analysis and hierarchical regression analysis were used. The measurement tools used in this study were studied through three-dimensional composition, including the characteristics and interaction and immersion of content produced in 2D, 3D and 360°, which are elements of virtual reality characteristics. Results: The results of this study are as follows. Among the types of content production, content produced with 2D and 360 technologies was found to affect immersion, while content produced in 3D affected interaction. Motion sickness has been investigated to affect both immersion and interaction. Conclusion: Service-provided platform enterprises and content-making enterprises should consider content-making and providing services that suit service characteristics and purposes, taking into account the characteristics of interaction and immersion in content-making investment and service delivery.