• Journal of Korea Society of Digital Industry and Information Management
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• v.12 no.1
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• pp.97-106
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• 2016

3D virual reality technique develop rapidly such as parts of education, health, national defense, etc. This paper implements an education contents utilizing 3D virtual reality based on HMD. In this paper, contents make up Changdeokgung Palace using to 3Dmax and Unity program, it shows on implemented Helmet Mounted Display. HMD obtain dynamic image from the target source of smart phone. Also, contents consist of service senerio through divided palace position and King's a day's journey especially. Above all, this paper indicate improving performance according to reduced cybersickness and immersion enlargement. And memory capacity reduced by various technique such that file type, compressed file, minimized resource. Proposed technique can obtain dynamic 3D image by HMD implementation at real time basis so that it is possible to use simultaneously multi-source. From the various and practical experiment, it is confirm that proposed 3D VR education system is useful for experience of virtual reality practically.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.3
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• pp.558-567
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• 2017

In this research, we developed an efficient real-time human exercise pose estimation system using multiple Kinects. The main objective of this system is to measure and recognize the user's posture (such as knee curl or lunge) more accurately by employing Kinects on the front and the sides. Especially it is designed as an extensible and modular method which enables to support various additional postures in the future. This system is configured as multiple clients and the Unity3D server. The client processes Kinect skeleton data and send to the server. The server performs the multiple-Kinect calibration process and then applies the pose estimation algorithm based on the Kinect-based posture recognition model using feature extractions and the weighted averaging of feature values for different Kinects. This paper presents the design and implementation of the human exercise pose estimation system using multiple Kinects and also describes how to build and execute an interactive Unity3D exergame.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.05a
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• pp.133-136
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• 2022

As the number of stress-related diseases increases due to the prolonged Corona 19, Corona Blue is attracting attention. This social background causes negative emotions due to frustration at work, changes in existing life rhythms, and blockade of economic sources, and makes us understand our era as an era in need of healing. Therefore, the purpose of this study is to propose a 3D-based adventure filming game that adventures a fantastic space and stores memories and experiences through photos. For this, important elements of healing were explored through literature study, and based on this, a game using 3ds Max and Unity was implemented. As a result of the study, the game was implemented with a filming function that contains visual elements for cute and warm healing, an emotionally approaching story, and the meaning of space. This study provides a game that can provide non-face-to-face healing to users and presents effective and important healing factors to service providers.

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2020.10a
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• pp.58-58
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• 2020

• Journal of Advanced Navigation Technology
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• v.25 no.1
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• pp.115-123
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• 2021

Pine nuts are Korea's representative nut forest products and profitable crops. However, pine nuts are harvested by climbing the trees themselves, thus the risk is high. In order to solve this problem, it is necessary to harvest pine nuts using a robot or an unmanned aerial vehicle(UAV). In this paper, we propose a deep learning based detection method for harvesting pine nut in UAV aerial images. For this, a video was recorded in a real pine forest using UAV, and a data augmentation technique was used to supplement a small number of data. As the data for 3D detection, Unity3D was used to model the virtual pine nut and the virtual environment, and the labeling was acquired using the 3D transformation method of the coordinate system. Deep learning algorithms for detection of pine nuts distribution area and 2D and 3D detection of pine nuts objects were used DeepLabV3+, YOLOv4, and CenterNet, respectively. As a result of the experiment, the detection rate of pine nuts distribution area was 82.15%, the 2D detection rate was 86.93%, and the 3D detection rate was 59.45%.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.384-386
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• 2014

본 논문에서는 초등학생을 위한 교육용 3D 골드버그 장치 애플리케이션을 개발하였다. 골드버그 장치는 창의력 증진을 위해 많이 제작한다. 하지만 골드버그 장치를 제작하기 위해서는 넓은 장소와 많은 도구가 필요해서 비용이 부담된다. 그래서 애플리케이션으로 개발하여 부담을 줄이고 실제로 골드버그 장치를 제작하는 것처럼 하기 위해 Unity 3D 엔진을 이용하여 3D와 물리법칙을 적용했다. 개발한 애플리케이션은 교육 프로그램에서 활용하여 초등학생의 창의성 증진, 물리법칙 이해, 공학적 설계능력 향상, 수학적 사고력 향상에 도움이 될 수 있다고 생각한다.

• Journal of the Korea Society of Computer and Information
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• v.23 no.9
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• pp.15-20
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• 2018

Currently the mobile augmented reality does not require supplemental hardware, such as markers like specific images or depth cameras, in order to acquire 3D environment information. This allows for increased accessibility and usability for the general user, and also broadened scope of development. The market research enterprise Counterpoint Research predicted that the growth of the augmented reality market will reach 70 trillion Korean Won by 2021. Application developments are also progressing. Wargaming, the developer of the global game World of Tanks, has launched an application that uses AR core at the GDC 2018. Thus, we must prepare for the impending augmented reality market and acquire top class augmented reality technology using 3D environment. This paper outlines the development of a game using AR CORE SDK to acquire 3D environment and Unity 3D game engine to combine camera images and 3D graphics, which all comes together to construct a natural augmented reality.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.14 no.2
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• pp.826-840
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• 2020

Vertigo is one of the most common complaints encountered by physicians and the patients are steadily increasing. These patients are exposed to the risk of secondary accidents such as falls due to vertigo. There are two ways to improve this symptom: medication and rehabilitation. Although temporary symptomatic improvement may be expected in patients treated with medication, vertigo may recur and medication can delay central compensation. In contrast vestibular rehabilitation exploits central mechanisms of neuroplasticity to increase postural stability and enhance visual-vestibular interactions in situations that generate conflicting sensory information. However, vestibular rehabilitation may be compromised by incorrect performance of exercises, and there is a need for active effort and interest from the patient during rehabilitation. To solve these problems, we decided to apply FOVE HMD for eye-tracking and Unity3D to create virtual reality. The proposed eye-tracking based algorithm calculates the concentration of users with eye tracking data and calculates the motion width of the patient with nystagmus, thus the severity of the patient according to the score can be determined. According to our experimental test against healty group and patients group, this result showed the meaningful data to use define the contents result.

• Journal of Digital Contents Society
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• v.18 no.5
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• pp.831-837
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• 2017

The popularization of smart phones is increasing interest in individual customized service and various systems have been changing in order to meet such changes to satisfy facilities such as museums. Museum has the element of view, contained purpose of history education, also has role as institution that should have fun and education. In order to achieve this purpose, it is necessary to arouse sufficient interest in cultural assets, In parallel, to provide various contents of cultural assets is essential. Therefore, to provide an efficient viewing cultural assets services in this study make a study to effective method for combined education and evaluation using Unity3D engine and SDK for Vuforia called Augmented Reality development.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.04a
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• pp.840-843
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• 2014

사실적 피부 렌더링은 피부 표면에서 일어나는 확산반사(Diffusion) 및 경면반사(Specular) 뿐 만 아니라 피부층 내에서 산란되어 나오는 산란광과 얇은 피부층을 통과하는 투과광 등을 고려하여 렌더링 되어야 한다. 이를 물리적인 개념들을 사용하여 실시간으로 계산하여 표현하는 것은 많은 계산량과 시간을 필요로 하므로 확산 반사 및 경면 반사 등을 미리 계산하여 텍스쳐로 저장하고 재사용하는 사전정의 BRDF 방법으로 근사화하여 표현할 수 있다. 하지만 사전정의 BRDF를 통해 생성된 피부 투과광색상 텍스쳐 맵은 그 색상이 고정되어있어 조명의 색상이 바뀌어도 피부를 투과하는 빛의 색상이 변하지 않아 부자연스러움을 보인다. 본 논문에서는 이러한 문제를 해결하기 위해 물체와 조명간의 거리를 이용하여 빛의 감쇠비율을 구하고 조명의 색상 값과 감쇠비율을 이용하여 피부 투과광 색상 텍스쳐 맵의 RGB채널 수정을 통해 피부 렌더링에서의 자연스러운 투과광 표현이 가능함을 보였다.