• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2016.11a
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• pp.187-189
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• 2016

미디어 이용 패턴이 TV 에서 다양한 스마트 기기로 넓어지고 있으며, 인터넷이 가능한 환경에서 광범위한 미디어 콘텐츠 제공이 가능하다. 최근에는 실감형 콘텐츠를 위해 360도 카메라와 이를 제어하는 방식들이 소개 되고 있다. 하지만 이러한 기술들을 활용해 더 많은 콘텐츠를 생성하기 위해서 콘텐츠의 특성을 고려한 실감 시청 체험 기술 서비스의 제공이 필요하다. 본 논문에서는 실감 시청 체험을 극대화할 수 있는 개인방송용 실감형 콘텐츠 제작 기술 서비스에 제안한다. 사용자와 상호작용이 가능한 실감 미디어 서비스를 제공하기 위해 카메라들의 배치, 뷰포인트 선택, 다양한 시청체험을 가능하게 할 파라미터 종류들을 정의한다. 본 연구를 통해 다양한 유형의 실감형 개인방송 콘텐츠를 제공할 수 있을 것으로 기대된다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2011.07a
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• pp.233-236
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• 2011

본 연구는 머리 추적 기술을 이용하여 파노라마 뷰어를 제어하는 새로운 방법을 제시한다. 360도 전방위로 녹화된 파노라마 비디오를 사용자의 머리를 추적하여 영상의 좌 우 회전, 위 아래 회전, 그리고 줌인/아웃이 가능하게 하며, 이는 사람의 관심 여부에 따라 머리가 움직이는 인간의 자연스러운 모습을 적용하여 쉽고 직관적인 제어가 가능하도록 한다. 실제 2009년 한국시리즈 야구 경기를 파노라마 카메라로 녹화하여 실험에 적용하여 실사용성을 확인하였다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2017.11a
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• pp.161-163
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• 2017

다양한 연령층에서 시청자가 늘어나고 있는 개인방송에서도 VR 서비스가 확대되고 있다. 기존의 VR 방송은 360도 카메라로 촬영된 영상을 시청자들이 VR로 보거나 개인방송 크리에이터들이 HMD를 착용하고 콘텐츠를 플레이 하는 영상을 시청자들이 시청하도록 구성되어있다. 시청자들의 몰입감과 흥미를 더욱 유발하기 위해 본 논문에서는 시청자의 입장에서 크리에이터가 진행하는 방송도 시청할 수 있고, 그 콘텐츠를 직접 즐길 수 있는 선택적 방송 시스템을 제안한다. 제안된 시스템은 기존의 시스템보다 시청자로 하여금 몰임감을 향상시키고 참여 한계를 극복할 수 있다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2016.06a
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• pp.54-55
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• 2016

개인이 실시간 방송을 할 수 있는 개인방송은 게임, 스포츠, 교육을 비롯하여 시대의 흐름을 고려한 요리, 다이어트 등과 같은 광범위한 미디어 콘텐츠를 생산하고 있다. 최근에는 실감형 콘텐츠를 위해 360도 카메라와 이를 마우스, 터치스크린, 자이로센서를 이용하여 제어하는 방식들이 소개되고 있다. 하지만 이러한 기술들을 활용해 더 많은 콘텐츠를 생산하기 위해서는 기술을 쉽게 사용할 수 있도록 제작자의 편리성을 고려한 기술 서비스의 제공이 필요하다. 본 논문에서는 실감 콘텐츠 제작 편리성을 위한 개인방송용 NUI 기술 서비스에 대해 논하고자 한다. 콘텐츠의 다양성과 빠르게 변화하는 IoT 기기 확장성을 고려하여 이와 연동 가능한 제스처 인식, 음성 인식 등과 같은 비 접촉식 NUI 서비스 기술과 이를 활용해 방송 제공자가 편리하게 다양한 콘텐츠를 제공할 수 있는 서비스 개념도를 제안하고, 관련 API 설계에 대해 보인다. 본 연구를 통해 개인방송을 접하는 사람들의 편의성, 흥미를 만족시켜 다채로운 서비스를 제공할 수 있고 나아가 편리성을 고려한 NUI 서비스 가이드라인을 마련할 수 있을 것으로 기대된다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.6
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• pp.207-214
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• 2011

In this paper, using Zigbee-based wireless sensor networks and Lego MindStorms NXT robot, a remote monitoring and navigation system for mobile robot has been developed. Mobile robot can estimate its position using encoder values of its motor, but due to the existing friction and shortage of motor power etc., error occurs. To fix this problem and obtain more accurate position of mobile robot, a ultrasound module on wireless sensor networks has been used in this paper. To overcome disadvantages of ultrasound which include straightforwardness and narrow detection coverage, we rotate moving node attached to mobile robot by $360^{\circ}$ to measure each distance from four fixed nodes. Then location of mobile robot is estimated by triangulation using measured distance values. In addition, images are sent via a network using a USB Web camera to smart phone. On smart phones we can see location of robot, and images around places where robot navigates. And remote monitoring and navigation is possible by just clicking points at the map on smart phones.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.34 no.2
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• pp.217-228
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• 2024

LiDAR(Light Detection And Ranging) sensors, which play a pivotal role among cameras, RADAR(RAdio Detection And Ranging), and ultrasonic sensors for the safe operation of autonomous vehicles, can recognize and detect objects in 360 degrees. However, since LiDAR sensors use lasers to measure distance, they are vulnerable to attackers and face various security threats. In this paper, we examine several security threats against LiDAR sensors: relay, spoofing, and replay attacks, analyze the possibility and impact of physical jamming attacks, and analyze the risk these attacks pose to the reliability of autonomous driving systems. Through experiments, we show that jamming attacks can cause errors in the ranging ability of LiDAR sensors. With vehicle-to-vehicle (V2V) communication, multi-sensor fusion under development and LiDAR anomaly data detection, this work aims to provide a basic direction for countermeasures against these threats enhancing the security of autonomous vehicles, and verify the practical applicability and effectiveness of the proposed countermeasures in future research.

• Journal of Veterinary Clinics
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• v.31 no.5
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• pp.371-375
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• 2014

This article describes the use of laparoscopic-assisted cystoscopy for removal of urinary calculi in five dogs. All dogs had micturition disorder due to urinary calculi. The surgical technique used was same in all cases. A urethral catheter passed into the urinary bladder through the urethra preoperatively. A 5-mm diameter cannula was placed in the ventral midline, 1 to 2 cm cranial to the umbilicus, and the 5-mm laparoscope was introduced via the cannula. A 10-mm diameter cannula was placed adjacent to the apex of the bladder under the visual guidance of laparoscopy. The bladder was then partially exteriorized through the 10-mm portal site, and a stab incision was performed on the bladder wall. The incisional margin of the bladder was sutured to the skin of the second portal site in $360^{\circ}$ simple continuous suture. A 2.7-mm diameter cystoscope with a sheath was introduced into the bladder lumen. The cystic and urethral calculi were removed under the visual guidance of cystoscopy with continuous fluid flushing. No major postoperative complications were identified. During the follow up period (range 7 to 21 months), no episodes of urinary dysfunction or recurrence of clinical signs were observed.

• Science of Emotion and Sensibility
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• v.14 no.3
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• pp.347-360
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• 2011

To find out characteristics of TV home shopping's virtual space deepness styling, this study had analysis characteristics of space deepness which is showed on flat TV screen with actually aired 6 dinnerware sales case, at $C^*$ home shopping, March.2005~November.2010, and survey consumer's emotional verbal image according to space styling character to get space deepness, which were shown on flat TV screen with camera angle, and research mutual relation with consumer preference. Also consumer's typical emotional verbal images for each space styling images for brand dinner ware sales had been extracted with reliability analysis, factor analysis, and multi dimensional scaling MDS using SPSS. Styling characteristics of space deepness were contrast of size, layering, vertical arrangement, and perspective arrangement, and used camera angles were bird's eye view, hi angle, and eye level. Result from the research is, highly marked consumer preferred styling material had a deep corelation to material's main factor and perceived emotional verbal images. Therefore this research could bring forward to new consumer preferred styling characteristics according to camera angle. Furthermore, it will be possible to make a study of preferred styling material through evaluation of quantitative spectators of in this area.

• Cartoon and Animation Studies
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• s.45
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• pp.197-214
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• 2016

Augmented Reality, virtual reality in recently attracted attention throughout the world. and Mix them mixed reality etc., it has had a significant impact on the overall pop culture beyond the scope of science and technology. The world's leading IT company : Google, Apple, Samsung, Microsoft, Sony, LG is focusing on development of AR, VR technology for the public. The many large and small companies developed VR hardware, VR software, VR content. It does not look that makes a human a human operation in the cognitive experience of certain places or situations or invisible through Specific platforms or program is Encompass a common technique that a realization of the virtual space. In particular, out of the three-dimensional image reveals the limitations of the conventional two-dimensional structure - 180, 360 degree images provided by the subjective and objective symptoms such as vision and sense of time and got participants to select it. VR technology that can significantly induce the commitment and participation is Industry as well as to the general public which leads to the attention of colostrum. It was introduced more than 10 related VR works Year 2015 Sundance Film Festival New Frontier program. The appearance VR content : medical, architecture, shopping, movies, animations. Also, 360 individuals can be produced by the camera / video sharing VR is becoming an interactive tunnel between two possible users. Nevertheless, This confusion of values, moral degeneration and the realization of a virtual space that has been pointed out that the inherent. 4K or HUD, location tracking, motion sensors, processing power, and superior 3D graphics, touch, smell, 4D technology, 3D audio technology - It developed more than ever and possible approaches to reality. Thereafter, This is because the moral degeneration, identity, generational conflict, and escapism concerns. Animation is also seeking costs in this category Reality. Despite the similarities rather it has that image, and may be the reason that the animation is pushed back to the VR content creation. However, it is focused on the game and VR technology and the platform that is entertaining, but also seek new points within the animation staying in the flat Given that eventually consist of visual images is clear that VR sought. Finally, What is the reality created in the virtual space using VR technology could be applied to the animation? So it can be seen that the common interest is research on what methods and means applied.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.38 no.6
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• pp.684-691
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• 2001

In this paper, we design and implement a system which recognizes and tracks a human head on a sequence of images. In this paper, the color of the skin and ellipse modeling is used as feature vectors to recognize the human head. And the modified time-varying edge detection method and the vertical projection method is used to acquire regions of the motion from images with very complex backgrounds. To select the head from the acquired candidate regions, the process for thresholding on the basis of the I-component of YIQ color information and mapping with ellipse modeling is used. The designed system shows an excellent performance in the cases of the rotated heads, occluded heads, and tilted heads as well as in the case of the normal up-right heads. And in this paper, the combinational technique of motion-based tracking and recognition-based tracking is used to track the human head exactly even though the human head moves fast.