• Journal of Korea Multimedia Society
• /
• v.19 no.9
• /
• pp.1723-1737
• /
• 2016

When watching 3D contents, people often experience various visual discomforts like tiredness, dryness, headaches, and dizziness. Previous researches on visual discomfort analyzed and concluded vergence-accommodation conflict, viewing distance, and brightness changes to be the causes of visual discomfort. Yet it is necessary to systematically analyze the visual discomfort due to the changes in object, background brightness and viewing distance. In this paper, we produce four videos that have four different background brightness and two different viewing distances to solve analyze the visual discomfort from watching 3D contents. We measure and analyze eye-blink and saccadic movement, saccadic latency, Nearest Point of Convergence (NPC), and participant survey for amore accurate result compared to previous researches. Our results show that the eye-blink rate and saccadic latency increase when the background is bright and viewing distance is close while the saccadic movement decreases in the same environment. However, NPC only changes when the background brightness changes. We confirm that the bright background and near viewing distance create greater visual discomfort and decrease depth perception abilities.

• International Journal of Advanced Culture Technology
• /
• v.10 no.4
• /
• pp.478-486
• /
• 2022

Holography is a human-friendly technology that can express 3D stereoscopic information without eye fatigue. You can experience the mysterious features of light directly and indirectly, and you can also experience the principles of 3D imaging, which makes it a very good curriculum. As such, although holography is very effective in teaching students optics and 3D imaging technology, it has not yet been systematically established. The reason is the cost burden such as expensive equipment and laboratories, and the lack of easily accessible educational equipment. We implemented a portable holographic recording system to solve this problem. In addition, since silver halides, which use harmful chemicals, are not used in the process of developing the recording medium, and photopolymers are used, it is possible to educate not only the general public but also young students. In order to improve the completeness of the recorded result, the mechanism part, light source, and recording medium part of the production system were newly constructed to complement all the existing problems. The proposed system will make holography easily accessible to many people in a variety of fields, not just education. Through the interesting experience of various features and principles of light and the production of holograms with high satisfaction, we hope to popularize them in various fields such as education.

• Geophysics and Geophysical Exploration
• /
• v.7 no.2
• /
• pp.105-108
• /
• 2004

Immersive virtual reality has been used in areas of oil and gas exploration for visualization and analysis of various spatial data, such as wireline logs, 3-dimensional seismic data volume, formational boundaries, fault, and some other reservoir characteristics. Although virtual reality is a valuable tool in this area, in most cases, it requires a large budget. This paper describes the construction of a single screen, passive stereo, virtual reality, display system based on commodity, or otherwise, low-cost components. The core elements of the system are a PC with a two-channel 3-D graphics, two projects, and a polarized stereo. There are many options available for the major elements of such a system, and the basic system can be modified or adapted to many different styles of use.

• Cartoon and Animation Studies
• /
• s.15
• /
• pp.237-249
• /
• 2009

Interest in and study on 3 dimensional pictures has been continued since visual media showing moving images was invented. From simple anaglyph wearing glasses to hologram making perfect 3 dimensional objects by recording phase data of reflected light, as well as amplitude and wave, speed and scope of technical development are quicker and wider, respectively. However, despite such development of technology, there is still lack of study on aesthetical, industrial and contents developing area, except for technology of 3 dimensional images. Unlike the interest in 3 dimensional images, even a theoretical frame for the approach to theoretical areas of 3 dimensional images has not been established. Especially, few experiment and study on directing aesthetics have been conducted, with exception of areas in entertainment documentaries for 3 dimensional feeling or some latest 3D animations. As a result, this study will try to find alternatives to directing aesthetics of realistic 3 dimensional movies to be developed in future by studying directing grammar and aesthetics of digital 3 dimensional movies and finding and analyzing difference between 3 dimensional images and 2 dimensional images drawn on the plane.

• Journal of Broadcast Engineering
• /
• v.22 no.4
• /
• pp.429-437
• /
• 2017

2D-to-3D conversion technology has been studied over past decades and integrated to commercial 3D displays and 3DTVs. Generally, depth cues extracted from a static image is used for generating a depth map followed by DIBR (Depth Image Based Rendering) for producing a stereoscopic image. Further, motion is also an important cue for depth estimation and is estimated by block-based motion estimation, optical flow and so forth. This papers proposes a new method for motion depth generation using Motion History Image (MHI) and evaluates the feasiblity of the MHI utilization. In the experiments, the proposed method was performed on eight video clips with a variety of motion classes. From a qualitative test on motion depth maps as well as the comparison of the processing time, we validated the feasibility of the proposed method.

• Journal of Broadcast Engineering
• /
• v.7 no.3
• /
• pp.211-218
• /
• 2002

This paper introduces the HD 3DTV camera and 3DTV receiver that are compatible with the ATSC HDTV broadcasting system. The developed 3DTV camera is based on stereoscopic techniques, and it has control function to control both left and right zoom lens simultaneously and to control the vergence. Moreover, in order to control the vergence manually and to eliminate the synchronization problem of the both images, the 3DTV camera has the 3DTV video multiplexing function to combine the left and right images into the single image. The developed 3DTV signal, and it has the various analog/digital interfaces. The performance of the developed system is confirmed by shooting the selected soccer game in 2002 FIFA KOREA/JAPANTM World Cup and by broadcasting the match. The HD 3DTV camera and receiver will be applied to the 3DTV industries such as 3D movie, 3D game, 3D image processing, 3DTV broadcasting system, and so on.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2011.07a
• /
• pp.301-302
• /
• 2011

최근 3D 디스플레이가 3DTV는 물론 스마트폰이나 태블릿PC와 같이 작은 디스플레이 사이즈와 해상도를 가지는 휴대용 기기들에도 적용되어 다양한 형태로 사용자들에게 보급되어 보다 많은 관심을 받고 있다. 2D+Depth 형태의 입체영상에서 사용자에게 입체감을 주는 데는 깊이맵이 큰 영향을 준다. 또한 깊이맵이 복잡하게 구성되어 있을수록 사용자에게 보다 다양한 입체감을 제공할 수 있지만 실제로 사용자가 느끼는 입체감의 지각은 그렇지 못한 경우가 많기 때문에 사용자가 느끼는 임체감의 개선이 필요하다. 이에 본 논문에서는 깊이맵의 히스토그램을 기반으로 하여 깊이 평면과 깊이 편차를 이용하여 입체감을 개선하는 방법을 제안하고 주관적 실험을 통해 입체감의 변화를 확인하였다.

• Proceedings of the Korea Contents Association Conference
• /
• 2011.05a
• /
• pp.419-420
• /
• 2011

본 논문의 목적은 실시간 인터렉티브가 가능한 3D 입체영상의 구현 방법에 있다. 기존의 입체영상 구현 방식의 광학적이며 하드웨어적인 한계범위를 실시간 구현을 통해 보정해 보는 것과 동시에 색합성을 통한 기초적 입체영상 방법을 실험해봄으로써 입체영상의 제작방법만이 아닌, 상호작용을 통한 입체깊이감의 구현이라는 새로운 기능성을 탐구해 보고자 함에 근본 목적이 있다. 이를 위해 사용된 영상구현시스템은 Max/Msp/Jitter를 사용하였으며, 실질적으로 입체감의 깊이감있는 재현을 위한 실험으로는 피터 위머(Peter Wimmer)가 제안한 애너그리프 합성방법을 사용해 보았다.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2008.10a
• /
• pp.707-709
• /
• 2008

We proposed the method to present corrected depth cue to an observer by stereoscopic display. It was performed in sequence that designing the displayed space having a constant interval of depth and then defining the object space which had considered to an environment of display and based on computer graphics. Consequently, we had performed a different process of reported existing methods distinctively and taken the result which correctly designed depth cue having linearity whatever various sizes of display would be used.

• Journal of information and communication convergence engineering
• /
• v.13 no.1
• /
• pp.62-68
• /
• 2015

In this paper, we propose a watermarking method for protecting the ownership of three-dimensional (3D) content generated from depth and texture images. After selecting the target areas to preserve the watermark by depth-image-based rendering, the reference viewpoint image is moved right and left in the depth map until the maximum viewpoint change is obtained and the overlapped region is generated for marking space. The region is divided into four subparts and scanned. After applying discrete cosine transform, the watermarks are inserted. To extract the watermark, the viewpoint can be changed by referring to the viewpoint image and the corresponding depth image initially, before returning to the original viewpoint. The watermark embedding and extracting algorithm are based on quantization. The watermarked image is attacked by the methods of JPEG compression, blurring, sharpening, and salt-pepper noise.