• Journal of Broadcast Engineering
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• v.11 no.4 s.33
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• pp.495-506
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• 2006

In this paper, we propose a self-calibration of a multi-camera system using factorization techniques for realistic contents generation. The traditional self-calibration algorithms for multi-camera systems have been focused on stereo(-rig) camera systems or multiple camera systems with a fixed configuration. Thus, it is required to exploit them in 3D reconstruction with a mobile multi-camera system and another general applications. For those reasons, we suggest the robust algorithm for general structured multi-camera systems including the algorithm for a plane-structured multi-camera system. In our paper, we explain the theoretical background and practical usages based on a projective factorization and the proposed affine factorization. We show experimental results with simulated data and real images as well. The proposed algorithm can be used for a 3D reconstruction and a mobile Augmented Reality.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.519-521
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• 2022

본 논문에서는 교통약자들의 이동제한 및 한계와 코로나 19로 인한 관광산업의 손실을 해결할 VR/360도 가상현실을 통한 웹 플랫폼 개발을 제안한다. 이 연구는 활용될 자원인 계절과 날씨자료를 효율적으로 촬영 및 준비하여 기존의 VR/360도의 가상현실을 최대화하고, 기존의 로드뷰 API 및 VR기기의 응용을 다양화한다. 또한, 이 연구는 '관광지를 방문한다'라는 개념을 실외뿐만이 아니라 실내에서도 사실적으로 체험할 수 있음을 제시한다. 이때 사실적인 체험을 더욱 극대화하기 위하여 VR/360도에 접목된 계절과 날씨의 콘텐츠를 구매할 수 있게 하여 소비자에게 선택지 내에서의 다양성을 주고, 단순 체험이 아닌 관광산업의 경제적 이윤으로 연결한다. 본 논문에서는 예상결과를 통하여 기존의 단순 VR/360도 체험을 통한 가상현실에 비해 좀 더 다양한 환경 조성을 통한 콘텐츠와 관광산업의 개선 및 경제성 면에서 발전성을 보인다.

• The Journal of the Convergence on Culture Technology
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• v.9 no.4
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• pp.253-258
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• 2023

In comics, panels serve a variety of dramatic purposes, including controlling the flow of the story through the size, placement, and order of panels; directing the eye to where characters or specific actions take place; expressing the passage or sequence of time; and using backgrounds, lighting, and color to emphasize emotion and convey mood. When applied to VR animation, these comic panels can give users a more immersive experience of the cartoon world in the VR space. In the VR animation "Mescaformhill: Missing Five," produced in 2022, the comic panels directing is very important to guide the viewer's attention, and in the VR space, the camera angle can be freely changed to realize various visual effects, and the physical interaction brings the comic panels directing to life. This can open up new ways of storytelling in VR animation and contribute to its successful expansion into new mediums.

• Journal of the Health Care and Life Science
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• v.8 no.2
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• pp.127-133
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• 2020

While only the experts could create the contents in the existing VR contents business, in the proposed "Untact Social VR Video-Based Tour Scheduling", the GUI (Graphic User Interface) allows anyone to easily and quickly share the information taken through VR camera after creating. It is intended to serve as a variety of SNS-based media by developing a structure that can be shared in html format after creating with the GUI menus. In particular, it is applied to companies that operate the SNS-type publicity projects including experience facilities and viewing facilities, and the various SNS-type publicity businesses that create the VR contents. Communication is clear compared to the existing homepage-based information delivery method, and It aims to provide universality that anyone can easily edit in an environment where only experts can edit VR video contents of.

• Journal of Digital Convergence
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• v.20 no.2
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• pp.389-398
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• 2022

Recently, tourism and leisure related VR contents have gained attention of potential tourists. Therefore, this study aimed to analyze investigate the effects of 360-degree VR tourism contents motivations, flow, continuance usage intention on visit intention for Chinese student in Korea. This study found that hedonic benefit and personal benefit exerted a positive influence on visit intention of contents users. However, vividness and usability did not influence on visit intention. Moreover, flow exerted a significant influence on visit intention but continuance usage intention did not influence on visit intention. The study is significant in shedding light on whether the motivations, flow, continuance usage intention of 360-degree VR tourism contents influences visit intention. It is suggested that the consumption of 360-degree VR tourism contents can be a useful marketing tool for strength of intention to visit.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.05a
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• pp.135-136
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• 2018

본 논문에서는 Video See Through VR을 구현하기 위해 외부 광학 카메라와 HMD(Head Mounted Display)간의 영상을 혼합하기 위한 기술로 두 소스 간의 정렬, 캘리브레이션 등의 관련 기법에 대해 고찰한다. 스테레오 카메라 영상의 혼합과 광학적으로 왜곡된 영상의 보정, 현실 스케일과 렌즈를 통해 들어오는 영상과의 스케일 매칭 관련 사항을 제시한다.

• International journal of advanced smart convergence
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• v.6 no.1
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• pp.18-25
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• 2017

Recently, VR HMD (virtual reality head mounted display) has been utilized for virtual training, entertainment, vision therapy, and optometry. In particular, virtual reality contents are increasingly used for vision therapy and optometry. Accordingly, high-quality virtual reality contents such as a natural vision of life is required. Therefore, it is necessary to study the content production according to the optical characteristics of the VR HMD. The purpose of this paper is to suggest a proper FOV (field of view) of contents according to the distortion rate. We produced virtual reality contents and obtained distorted images by virtual camera. The distortion rate is calculated by using the distorted image. It is proved that the optimal FOV of the VR content with the minimum distortion is $90{\sim}100^{\circ}$. The results of this study are expected to be applied to the production of high quality contents.

• International journal of advanced smart convergence
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• v.6 no.1
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• pp.9-17
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• 2017

Recent development in virtual and augmented reality increases the demand for content in many different fields. One of the fast ways to create content for VR is 3D modeling of real objects. In this paper we propose a system to reconstruct three-dimensional models of real objects from the set of two-dimensional images under the assumption that the subject does not has distinct features. We explicitly consider an object that is made of one or more surfaces and radiant constant energy isotropically. We design a low cost portable multi camera rig system that is capable of capturing images simultaneously from all cameras. In order to evaluate the performance of the proposed system, comparison is made between 3D model and a CAD model. A simple algorithm is also proposed to acquire original texture or color of the subject. Using best pattern found after the experiments, 3D model of the Pyeongchang Olympic Mascot "Soohorang" is created to use as VR content.

• The Journal of the Convergence on Culture Technology
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• v.8 no.5
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• pp.603-611
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• 2022

As the era of metaverse approaches, there are challenges that need to be solved. Among them, 'cyber motion sickness' is a representative problem from 2016;when VR technology began to attract attention. According to the theory of sensory conflict, motion sickness is caused when the perceived direction of motion information and the expected value are not the same. The paper was written to theoretically explore the relationship between brain cognition and cyber motion sickness, and to prove the effect of user immersion on motion sickness symptoms based on this. Through the SSQ experiment, it was found that the rotation value of the camera aggravates the symptoms of cyber motion sickness and can alleviate cyber motion sickness by increasing the immersion of the game by giving the viewer visual and shift missions to solve. This study was conducted to solve the problem of cyber motion sickness during the process of developing the VR rhythm game "beatale", and it is expected to be the basis for improving cyber motion sickness not only in the development of the project but also in the production of VR contents in the future.

• Journal of Digital Convergence
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• v.16 no.2
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• pp.335-341
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• 2018

This study is a study on effective stitching technique for video recorded by using a dual-lens $360^{\circ}$ camera composed of two fisheye lenses. First of all, this study located a problem in the result of stitching by using a bundled program. And the study was carried out, focusing on looking for a stitching technique more efficient and closer to perfect by comparatively analyzing the results of stitching by using Autopano Video Pro and Autopano Giga, professional stitching program. As a result, it was shown that the problems of bundled program were horizontal and vertical distortion, exposure and color mismatch and unsmooth stitching line. And it was possible to solve the problem of the horizontal and vertical by using Automatic Horizon and Verticals Tool of Autopano Video Pro and Autopano Giga, problem of exposure and color by using Levels, Color and Edit Color Anchors and problem of stitching line by using Mask function. Based on this study, it is to be hoped that $360^{\circ}$ VR video content closer to perfect can be produced by efficient stitching technique for video recorded by using dual-lens $360^{\circ}$ camera in the future.