• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.28 no.6
• /
• pp.669-676
• /
• 2010

Visualization requires for effective analysis of the spatial data collected by various sensors. The best way to convey 3D digital spatial information which is modeling of the real world to the users, realistic 3D visualization and display technology. Since most of the display is based on 2D or 2.5D projection to the plane, there is limitation in representing real world in 3D space. In this paper, data from airborne LiDAR for topographic mapping, Flashi-LiDAR as emerging sensor with great potential to 3D data acquisition, and multibeam echo-sounder for underwater measurement, were stereoscopically visualized. 3D monitors are getting popular and could be information media and platform in geoinformatics. Therefore, study on creating 3D stereoscopic contents of spatial information is essential for new technology of stereo viewing systems.

• 한국가시화정보학회:학술대회논문집
• /
• 2005.12a
• /
• pp.17-22
• /
• 2005

An experimental study was carried out to investigate the effect of local ultrasonic forcing on a turbulent boundary layer. Stereoscopic particle image velocimetry (SPIV) was used to probe the characteristics of the flow. A ultrasonic forcing system was made by adhering six ultrasonic transducers to the local flat plate. Cavitation which generates uncountable minute air-bubbles having fast wall normal velocity occurs when ultrasonic was projected into water. The SPIV results showed that the wall normal mean velocity is increased in a boundary layer dramatically and the streamwise mean velocity is reduced. The skin friction coefficient ($C_{f}$) decreases $60\%$ and gradually recovers at the downstream. The ultrasonic forcing reduces wall-region streamwise turbulent intensity, however, streamwise turbulent intensity is increased away from the wall. Wall-normal turbulent intensity is almost the same near the wall but it increases away from the wall, In tile vicinity of the wall, Reynold shear stress, sweep strength and production of turbulent kinetic energy were decreased. This suggests that the streamwise vortical structures are lifted by ultrasonic forcing and then skin friction is reduced.

• 한국가시화정보학회:학술대회논문집
• /
• 2003.11a
• /
• pp.35-38
• /
• 2003

Simultaneous measurement of velocity and concentration fields in a stirred mixer flow using a combined Stereo-PIV/Planar-LIF technique is carried out. Instantaneous velocity fields and concentration fields represent the local flow characteristics. A baffle is perpendicularly attached to the Wall to remove inactive region which shows very slow dispersion. It is found that the baffle produces tip vortex and breaking the divided streamline, so that mixing efficiency could be increases significantly.

• 한국가시화정보학회:학술대회논문집
• /
• 2004.11a
• /
• pp.60-63
• /
• 2004

A new PIV technique was developed for decreasing optical error which was created during simultaneous measurements of velocity fields at a wall-normal plane and wall-parallel plane by a plane PIV and a Stereoscopic PIV system. The two Nd:Yag laser systems and three CCD cameras were. synchronized to obtain instantaneous velocity fields at the same time. To avoid optical noise at the crossing line by the two laser light sheets, a new optical arrangement using polarization was applied. The obtained velocity fields show the existence of hairpin packet structure vividly and the idealized hairpin vortex signature is confirmed by experiment.

• 한국가시화정보학회:학술대회논문집
• /
• 2004.12a
• /
• pp.41-45
• /
• 2004

The dynamic particle image velocimetry (PIV) is consisted of a high frequency pulse laser, high speed cameras and a timing controller. The three velocity components of flow downstream of an axial flow fan for PC cooling system are measured using the dynamic PIV system. An Axial flow fan has seven blades of 72 mm in diameter. The rotating speed is 1800 rpm. The downstream flow is visualized by smoke particles of about $0.3-1\;{\mu}m$ in diameter. The three-dimensional instantaneous velocity fields are measured at three downstream planes. The swirl velocity component was diffused downstream and the change in time-mean vorticity distribution downstream was also discussed. The spatio-temporal change in axial velocity component with the blades passing is recognized by the instantaneous vector maps. And the dynamic behavior of vorticity moving with the rotating blades is discussed using the unsteady vorticity maps.

• Proceedings of the Korean Information Science Society Conference
• /
• 2012.06c
• /
• pp.335-337
• /
• 2012

전투공간 시뮬레이션 결과를 가시화할 뿐 아니라 시나리오 가시화 중에 사용자가 선택한 엔티티의 상세한 관찰을 제공하기 위해 스테레오 3D 모델 뷰어를 개발하여 가시화 시스템의 프로토타입을 구성하였다. 전투공간 가시화를 위해서는 가시화 스프트웨어인 SIMDIS를 사용하였다. 사용자는 시뮬레이션 가시화 스크린 상에서 엔티티를 선택할 수 있으며, 이 엔티티의 자세한 관찰은 스테레오 3D 모델 뷰어에 가시화 된다. 모델 뷰어는 사용자에게 엔티티 관찰 시 몰입감과 인지도를 향상시키기 위하여 헤드 트래킹 기술을 적용하였다. 사용자의 위치를 추적하기 위해서는 깊이 카메라를 이용하였으며, 획득한 깊이 영상을 통해 실시간 사용자 헤드 트래킹을 적용하였다. 구현된 시스템은 SIMDIS를 이용한 전투공간 시뮬레이션 가시화와 스테레오 3D 뷰어를 각각 가시화하기 위하여 2D 디스플레이와 3D TV를 사용하였다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2014.04a
• /
• pp.677-679
• /
• 2014

생명현상은 기능적 요소인 단백질의 활성에 의해 유지되고 조절된다. 최근 단백질의 복잡한 네트워크 정보가 생명현상을 조절하는 기능적 단위로 인식되면서 단백질 네트워크의 최소 단위인 단백질-단백질 상호작용 정보의 중요성이 강조되고 있다. 특히 단백질의약품의 경우 단백질 네트워크 상에서 리셉터 단백질과 리간드 단백질 사이의 상호작용에 의해서 약효가 나타나도록 설계되기 때문에 상호작용에 관여하는 인터페이스 정보의 확보가 필수적이다. 단백질-단백질 상호작용 인터페이스 확인을 위한 연구들이 활발히 이루어지고 있으나 인터페이스 정보의 가시화에 대한 연구는 극히 제한적이다. 본 논문에서는 리셉터 단백질과 리간드 단백질에 대한 3차구조 분석을 통해 단백질-단백질 상호작용에 관여하는 인터페이스 정보를 가시화하였다. 기존의 단백질 3차구조 정보 서비스 사이트인 PDB에서 확인할 수 없는 인터페이스 정보를 3차원으로 시각화하여 인터페이스 상에 위치하는 아미노산 정보를 새롭게 제공함으로써 의약품 연구자들이 단백질 구조와 인터페이스 구조를 쉽게 파악할 수 있도록 하였다. 이는 의약품 등 단백질-단백질 상호작용 정보를 활용하는 바이오 산업 분야에 필요한 정보를 제공함으로써 산업 활성화에 기여할 것으로 기대된다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2015.04a
• /
• pp.873-874
• /
• 2015

단백질 의약품 개발 시 단백질 구조는 단백질 기능을 규명하기 위한 필수적인 정보이다. 따라서 단백질 구조를 효과적으로 전달할 수 있는 단백질 가시화 서비스가 증가하고 있으며, 대표적으로 Cn3D, Jmol, Chimera 등이 있다. 각 서비스는 단백질 가시화 서비스와 함께 단백질 분석을 위한 부가 기능을 제공하고 있다. 본 논문에서는 단백질 의약품의 효율적 정보전달 서버스를 위한 사전 연구로 업계종사 기간이 5년 이상인 피험자를 대상으로 단백질 가시화 이용현황을 설문하였다. 설문 분석 결과 자주 이용하는 단백질 가시화 서비스로 피험자 모두 PDB를 사용한다고 응답하였으며, 단백질 1, 2차구조 혼합 가시화 서비스를 일주일에 4회 이상 사용하는 응답자가 58.3%였다. 특히 단백질 의약품 개발 시 반드시 필요한 단백질 정보로는 91.6%가 단백질 1차구조, 단백질 2차구조, 단백질 2차구조 비율이라고 응답하였다.

• Journal of the Institute of Electronics Engineers of Korea SC
• /
• v.47 no.4
• /
• pp.15-20
• /
• 2010

The three dimensional information is extracted and visualized using by stereo images of the object and the method for a 3D stereoscopic image is presented by the vergence control algorithm. The matching, which is applied a undistortion of lens and the energy function, is executed for the efficient extraction three dimensional information. Especially, applying the optimized method of matched line to the multi direction of the disparity imges. The disadvantages of multi directional method and reliability expansion method is collected. The matched interesting range of the three dimensional information is visualized using by VRML and more 3D stereoscopic image is visualized through the vergence control according to distance of the object. more improved three dimensional information is provided to observer by visualizing both of them at the same time.

• Journal of the Institute of Electronics and Information Engineers
• /
• v.53 no.12
• /
• pp.175-179
• /
• 2016

Recent advances in technology of medical image have made surgical simulation that is helpful to diagnosis, operation plan, or education. Improving and enhancing the medical imaging have led to the availability of high definition images and three-dimensional (3D) visualization, it allows a better understanding in the surgical and educational field. The Real human field of view is stereoscopic. Therefore, with just 2D images, stereoscopic reconstruction process through the surgeon's head, is necessary. To reduce these process, 3D images have been used. 3D images enhanced 3D visualization, it provides significantly shorter time for surgeon for judgment in complex situations. Based on 3D image data set, virtual medical simulations, such as virtual endoscopy, surgical planning, and real-time interaction, have become possible. This article describes principles and recent applications of newer imaging techniques and special attention is directed towards medical 3D reconstruction techniques. Recent advances in technology of CT, MR and other imaging modalities has resulted in exciting new solutions and possibilities of shoulder imaging. Especially, three-dimensional (3D) images derived from medical devices provides advanced information. This presentation describes the principles and potential applications of 3D imaging techniques, simulation and printing in shoulder and elbow practice.