• Journal of Broadcast Engineering
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• v.18 no.4
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• pp.589-598
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• 2013

In order to understand 3D visual fatigue, it is necessary to examine the visual fatigue induced by camera parameters as well as that induced by a pre-existing 3D content. In the present study, we examined the effects of camera parameters, such as roll misalignment error, shooting distance and vergence condition on 3D visual fatigue and we modelled it. The results indicate that roll misalignment error, shooting distance and vergence condition affect 3D visual fatigue and the effect of roll misalignment error on 3D visual fatigue is evident specifically when screen disparity is relatively small.

• Journal of the HCI Society of Korea
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• v.4 no.2
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• pp.9-16
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• 2009

3D stereo display systems gain more interests recently. Multiple-view autostereoscopic display system enables observers to watch stereo image from multiple viewpoints not wearing specific devices such as shutter glasses or HMD. Therefore, the Multiple-view autostereoscopic display is being spotlighted in the field of virtual reality, mobile, 3D TV and so on. However, one of the critical disadvantages of the system is that observer can enjoy the system only in a small designated area where the system is designed to work properly. This research provides an effective way of GPU based rendering technique to present seamless 3D stereo experiences from an arbitrary observer's view position.

• Annual Conference of KIPS
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• 2003.05a
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• pp.659-662
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• 2003

본 논문에서는 2차원 영상 사이에 움직임 변위를 검출하여 영상내의 원근 깊이를 생성하였으며 양 시차(positive) parallax처리를 하여 입체 영상을 생성한 방법을 제안했다. 이 방식은 2 차원 영상내의 사물의 운동 방향과 속도에 관계없이 3차원 효과를 느낄 수 있다. 제안한 방법은 다양한 영상원에 대해서 실시간으로 입체 영상 변환이 가능하며 LCD shutter goggle 방식의 입체 영상 장치를 통해 실제 시각적인 검증을 수행하였다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2010.11a
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• pp.27-29
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• 2010

깊이데이터는 CG 또는 실사 영상에서 획득되는데 입체 영상 분야에서 활용도가 높다. 예를 들어 2D영상의 3D화질 개선, 입체영상의 입체감 개선 등의 활용이 되고 있다. 본 논문에서는 이러한 추세에 맞추어 홀로그램을 생성하는 입력 데이터의 전처리과정으로 통하여 CGH 홀로그램을 개선하는 영상처리 기술을 제안한다. 입력 데이터의 전처리를 통해 생성된 홀로그램 영상의 화질 개선을 제안하고, 실험을 통해 제안 방법의 우수성을 보여준다.

• Journal of Broadcast Engineering
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• v.17 no.1
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• pp.17-25
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• 2012

In this paper, we propose a method of producing a stereoscopic image from multiple images captured from a monoscopic camera. By translating a camera in the horizontal direction, left and right images are chosen among N captured images. For this, image edges are extracted and a rotational angle is estimated from edge orientation. Also, a translational vector is also estimated from the correlation of projected image data. Then, two optimal images are chosen and subsequently compensated using the rotational angle as well as the translational vector in order to make a satisfactory stereoscopic image. The proposed method was performed on thirty-two test image set. The subjective visual fatigue test was carried out to validate the 3D quality of stereoscopic images. In terms of visual fatigue, the 3D satisfaction ratio reached approximately 84%.

• Journal of Korean Society for Geospatial Information Science
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• v.22 no.3
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• pp.121-128
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• 2014

This study investigated the accuracy of DEM generated by heterogeneous stereo satellite images based on RPC. Heterogeneous sensor images with different spatial resolution are SPOT-5 panchromatic and IKONOS images. For the accuracy evaluation of the DEM, we compared the DEMs generated from two kinds of sensors and that produced using homogeneous SPOT-5 and IKONOS stereo images. As results of the evaluation, accuracy of 3D positioning by heterogeneous images was substantially similar to that of homogeneous stereo images for exact conjugate points. But, in terms of quality of the DEM, DEM generated by heterogeneous sensor showed a lower accuracy about twice in RMSE and about 3 times in LE90 than that of homogeneous sensors. As a result, DEM can be generated by using heterogenous satellite imagery. But if we use a stereo image with different spatial resolution, the performance of image matching was very important factor for the production of high-quality DEM.

• Journal of Broadcast Engineering
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• v.19 no.6
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• pp.896-906
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• 2014

In this paper, a real-time dual-mode temporal synchronization and compensation method based on a new reliability measure in stereoscopic video is proposed. The goal of temporal alignment is to detect the temporal asynchrony and recover synchronization of the two video streams. The accuracy of the temporal synchronization algorithm depends on the 3DTV contents. In order to compensate the temporal synchronization error, it is necessary to judge whether the result of the temporal synchronization is reliable or not. Based on our recently developed temporal synchronization method[1], we define a new reliability measure for the result of the temporal synchronization method. Furthermore, we developed a dual-mode temporal synchronization method, which uses a usual texture matching method and the temporal spatiogram method[1]. The new reliability measure is based on two distinctive features, a dynamic feature for scene change and a matching distinction feature. Various experimental results show the effectiveness of the proposed method. The proposed algorithms are evaluated and verified through an experimental system implemented for 3DTV.

• Electronics and Telecommunications Trends
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• v.26 no.1
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• pp.13-24
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• 2011

영화 "아바타"가 개봉되면서 입체 콘텐츠 특히 입체 영화에 대해 많은 사람들이 관심을 갖게 되었다. 초기 국내에서, 스테레오 영상 제작 시도는 많았지만, 입체 영상을 단순히 한 쌍의 영상을 보여주는 것으로 생각하여 잘못 제작되는 경우가 많았다. 입체영상 제작 기술은 한 쌍의 영상을 인간의 양안에 각각의 영상을 보여주면 3차원으로 인식한다는 데 기술적 근간을 두고 있으나, 초기엔 실세계에서 인간이 인식하는 것과 유사하게 처리되지 않아 시각피로를 유발하는 경우가 많았다. 그래서, 본 원고에서는 "아바타" 영화와 같은 입체영상을 제작하기 위해 어떠한 기술과 고려되어야 할 사항들이 있는지 살펴본다. 현재 입체 영상 획득 방식인 두 대의 카메라를 이용하여 실사로 촬영하는 데 필요한 기술과, 그 결과 영상을 후반작업에서 보정하고 합성하여 시각피로를 최소화하는 방법 및 기술들을 중심으로 살펴본다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.7 no.3
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• pp.577-581
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• 2003

The 3D infrared image enhancement with Stereoscopic algorithm on still infrared image is presented. The adapted stereoscopic method is that the depth is extracted by comparison with right-left image, and the enhanced 3D infrared image by matching based on feature is realized. As the result of experiment this method forces a 3D infrared image by the edge lines to be more smooth.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10b
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• pp.658-660
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• 2004

본 논문에서는 입체 영상을 이용한 몰입형 3차원 게임 제작 기법을 제안한다. 제안하는 기법은 셔터글래스를 이용하여 좌안과 우안의 영상을 분리 투영하여 사용자로 하여금 입체감 을 느낄 수 있도록 한다. 이때, 사용자가 느끼는 눈의 피로를 최소화하기 위하여 입체 영상 디스플레이에 필요한 인자들을 최적으로 선택하는 방법을 제안한다. 또한, 예시되는 블록격파게임에서의 충돌처리를 효율적으로 구현하기 위하여 본 논문에서는 체적소와 광선 추적법을 응용한 효율적인 알고리즘을 제안한다.