• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
• /
• pp.1334-1337
• /
• 2009

The human vision system has visual functions for viewing 3D images with a correct depth. These functions are called accommodation, vergence and binocular stereopsis. Most 3D display system utilizes binocular stereopsis. The authors have developed a monocular 3D vision system with accommodation mechanism, which is useful function for perceiving depth.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 2001년도 ICCAS
• /
• pp.103.5-103
• /
• 2001

This paper presents a visual feedback system that controls a micromanipulator using multiple microscopic vision information. The micromanipulation stations basically have optical microscope. However the single field-of-view of optical microscope essentially limits the workspace of the micromanipulator and low dept-of-field makes it difficult to handle 3D-shaped micro objects. The system consists of a stereoscopic microscope, three CCD cameras, the micromanipulator and personal computer. The use of stereoscopic microscope which has long working distance and high depth-of-field with selective field-of-view improves the recognizability of 3D-shaped micro objects and provides a method for overcoming several essential limitations in micromanipulation. Thus, visual feedback information is very important in handling micro objects for overcoming those limitations and provides a mean for the ...

• 한국정밀공학회지
• /
• 제21권10호
• /
• pp.154-161
• /
• 2004

An experimental method for measuring side-necking deformation near a crack-tip is described. It is based on Stereoscopic Digital Speckle Photography and Digital Image Correlation, and it is simple and robust to mechanical vibration inherent to a hydraulic material test system. The validity and accuracy are evaluated through a calibration fur rigid body translation. A case study has been performed for a CT specimen made of a ductile steel and the three dimensional profiles of the side-necked region are presented as the load increases. Also, the details of the procedure and the surface treatment are discussed.

• 반도체디스플레이기술학회지
• /
• 제10권3호
• /
• pp.99-103
• /
• 2011

The stereoscopic vision system is the algorithm to obtain the depth of target object of stereo vision image. This paper presents an efficient disparity matching method using blue edge filter and graph cut algorithm. We do recommend the use of the simple sobel edge operator. The application of B band sobel edge operator over image demonstrates result with somewhat noisy (distinct border). The basic technique is to construct a specialized graph for the energy function to be minimized such that the minimum cut on the graph also minimizes the energy (either globally or locally). This method has the advantage of saving a lot of data. We propose a preprocessing effective stereo matching method based on sobel algorithm which uses blue edge information and the graph cut, we could obtain effective depth map.

• 반도체디스플레이기술학회지
• /
• 제9권3호
• /
• pp.65-69
• /
• 2010

The stereoscopic vision system is the algorithm to obtain the depth of target object of stereo vision image. This paper presents an efficient disparity matching method using nagao filter, octree color quantization and dynamic programming algorithm. we describe methods for performing color quantization on full color RGB images, using an octree data structure. This method has the advantage of saving a lot of data. We propose a preprocessing stereo matching method based on Nagao-filter algorithm using color information. using the nagao filter, we could obtain effective depth map and using the octree color quantization, we could reduce the time of computation.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2005년도 학술대회 논문집 정보 및 제어부문
• /
• pp.484-486
• /
• 2005

Passenger safety is a primary concern of railway system but, it has been urgent issue that dozens of people are killed every year when they falloff from train platforms. Recently, advancements in IT have enabled applying vision sensors to railway environments, such as CCTV and stereo camera sensors. In this paper, we propose a stereoscopic video coding scheme for subway accident monitoring system. The proposed scheme is designed for providing flexible video among various displays, such as control center, station employees and train driver. We uses MPEG-2 standard for coding the left-view sequence and IBMDC for predicting the P- and B-types of frames of the right-view sequence. IBMDC predicts matching block by interpolating both motion and disparity predicted macroblocks. To provide efficient stereoscopic video service. we define both temporally and spatially scalable layers for each eye's-view by using the concept of Spatio-Temporal scalability. According to the experimental results. we expect the proposed functionalities will play a key role in establishing highly flexible stereoscopic video codec for ubiquitous display environment where devices and network connections are heterogeneous.

• 한국콘텐츠학회논문지
• /
• 제11권1호
• /
• pp.157-164
• /
• 2011

영화 아바타가 세계적으로 큰 성공을 거두면서, 대중들의 3D입체영상에 대한 관심은 증폭되었다. 그러나 일반적으로 3D라 일컬어지는 stereoscopic에 대한 대중들의 폭발적인 관심이 얼마나 지속될 수 있을지는 미지수다. 소비자들은 사회문화 환경 변인에서 오는 그들의 누적된 경험과 지배적인 의식이 있다는 점을 고려해야 할 것이다. 따라서 같은 내용의 영상물을 2D와 3D 입체영상으로 제시했을 때, 몰입도나 흥미의 지속성 등의 차원에서 어떤 차이를 보이는가에 대해 알아보는 일은 중요하다. 이 같은 관점에서, Jennett (2008) 은 게임의 몰입에 관한 측정도구를 개발하였는데, 본 논문에서는 이 도구를 이용하여, PC 게임 사용자들이 느끼는 3D 입체영상과 2D에서 몰입과 흥미 등의 정도 차이를 알아보고자 하였다.

• 디지털융복합연구
• /
• 제18권5호
• /
• pp.425-432
• /
• 2020

입체영상 기술은 디지털 영상 분야의 중요한 갈래이며, 지난 20여년 동안 연구와 발전을 거쳐 크게 성장하였다. 이 기술은 많은 분야에서 더 다양화되고 중요한 영상콘텐츠 제작 방법으로 발전하고 있다. 입체영상 기술에 기초한 홀로그램 투영 기술은 1947년 영국 헝가리계 물리학자 대니얼 가버의 이론적 연구 이후 홀로그램 기술은 지속적이면서 빠른 속도로 발전해 사회적으로 이슈화 되었다. 현재 진정한 홀로그램 기술에는 미치지 못하지만, 이와 유사한 기술을 활용한 입체영상 작품이 다양한 분야에 응용되면서 점점 더 중요하게 부각되고 있다. 본 연구는 디지털 영상콘텐츠 디자인 설계의 관점에서 고전적이고 창의적인 입체영상 기술을 활용한 콘텐츠 사례를 분석하고 홀로그램 투영의 멀티프로토콜 방향을 모색하였다.

• 한국임상보건과학회지
• /
• 제9권2호
• /
• pp.1520-1525
• /
• 2021

Purpose. This study conducted visual function training for children under 12 years of age who relapsed after surgery for intermittent exotropia. We are trying to find out whether the visual function has been improved by visual function training. Methods. After surgery, the subject with recurrent exotropia was given a prescription for refractive error, followed by visual function training and vision therapy with visual sence using prisms and lenses. Results. The subjects' positive relative convergence improved to 19.69𝚫, corrected visual acuity improved to 0.88, and stereoscopic vision function improved to 53.08 arc second. It was found that the smaller the angle of deviation at the time of recurrence after surgery, the better the vision therapy effect. Conclusions. It can be seen that visual function training is helpful in improving visual function, and the importance of visual function training can be known.

• 대한설비공학회:학술대회논문집
• /
• 대한설비공학회 2006년도 동계학술발표대회 논문집
• /
• pp.109-109
• /
• 2006