keywords : Computer Graphics, HCI, Mixed Reality, 3D Computer Vision, etc

coming soon!

We present a novel approach to generate an arbitrary in-between stereoscopic view from a wide-baseline stereo camera using a view morphing. Conventionally, a stereoscopic view for a real scene has been generated by a stereo camera simulating the human eye configuration with around 65mm horizontal separation, which provides a fixed viewpoint and a depth feeling wholly

depending on a camera pose. In this work, we use a wider-baseline stereo camera than that of conventional one to increase flexibility both for selecting viewpoints and controlling degree of depth feeling. View morphing is a shapepreserving transition method from a source to a destination view. By using this method, we can select an arbitrary location of a virtual stereo camera yielding an in-between stereoscopic view. We can also control the degree of depth feeling choosing different distance between virtual cameras to provide a customized depth feeling. As experimental results we show a series of synthesized in-between stereoscopic views using Middlebury stereo data set. We also show interlaced composition results using a pair of synthesized views having 65mmand 130mm-baseline from input views acquired by a 160mm-baseline stereo camera.

- supported by the Korea Research Foundation (KRF) Grant funded by the Korean Government  (MOEHRD): KRF-2007-357- D00235

- papers: [19]

We present a simple and intuitive method of user interaction, based on pointing gestures, which can be used with video avatars in a remote collaboration. By connecting the head and fingertip of a user in 3D space we can identify the direction in which they are pointing. Stereo infrared cameras in front of the user, together with an overhead camera, are used to find the user’s head and fingertip in a CAVETM-like system. The position of the head is taken to be the top of the user’s silhouette, while the location of the user’s fingertip is found directly in 3D space by searching the images from the stereo cameras for a match with its location in the overhead camera image in real time. The user can interact with the first object which collides with the pointing ray. In an experimental result, the result of the interaction is shown together with the video avatar which is visible to a remote collaborator.

- supported by Ministry of Information and Communication (MIC) under the Information

   Technology Research Center Program (ITRC)

- movies |  paper: [15]

We present a novel low-cost method for visual communication and telepresence in a CAVE^TM-like environment, relying on 2D stereo-based video avatars. The system combines a selection of proven efficient algorithms and approximations in a unique way, resulting in a convincing stereoscopic real-time representation of a remote user acquired in a spatially immersive display. The system was designed to extend existing projection systems with acquisition capabilities requiring minimal hardware modifications and cost. The system uses infrared-based image segmentation to enable concurrent acquisition and projection in an immersive environment without a static background. The system consists of two color cameras and two additional b/w cameras used for segmentation in the near-IR spectrum. There is no need for special optics as the mask and color image are merged using image-warping based on a depth estimation. The resulting stereo image stream is compressed, streamed across a network, and displayed as a frame-sequential stereo texture on a billboard in the remote virtual environment.
　

- supported by Ministry of Information and Communication (MIC) under the Information

  Technology Research Center Program (ITRC) and Korea Research Foundation (KRF)

- movies: mono1 | mono2 | stereo

- papers: [6][7][8][13][14]

Exhibited at SIGGRAPH 2003, San Diego, CA, USA

"Alice in Virtual World" lets players to experience the imaginary virtual world, as depicted in the famous Lewis Carroll's original novel, by immersing the user into the environment and having them play a simple game. To promote the feeling of immersion and virtual presence, 3D interaction techniques are employed to play the game using different VR devices suitable for the corresponding VR platform. 

- supported by Ministry of Information and Communication (MIC) under the Information

   Technology Research Center Program (ITRC)

- movie1 | movie2 | movie3

- poster

- supported by Ministry of Information and Communication (MIC) under the Information

  Technology Research Center Program (ITRC)

 - movie

 - papers: [2][3][4][5]

  Here are some research topics that I have done as a collaborator.

 - paper: [16]

 - papers: [17][18]

 - paper: [12]

 - paper: [11]

 - paper: [10]

 - paper: [9]

[19] Seon-Min Rhee, Jongmoo Choi, Ulrich Neumann (2008). Stereoscopic View Synthesis by View Morphing, Proceedings of the 4^th International Symposium on Visual Computing, December 1-3, 2008 Las Vegas, Nevada, USA. (accepted)
　

[18] Yoo-Joo Choi, Seon-Min Rhee, Hyo-Sun You(2008). Design and Implementation of Vision-based 3D Interaction Tool for Supporting Multiple Events, Proceeding of the 8^th Asia-Pacific Conference on Computer Human Interaction, Seoul, Korea, July 6-9, 2008. pp. 82-83.

domestic journals

[17] Yoo-Joo Choi, Seon-Min Rhee, Hyo-Sun You, Young Sub Roh(2008). Design of Vision-based Interaction Tool for 3D Interaction in Desktop Environment, Journal of Korea Information Processing Society, 15-B(3)

[16] Jiyoung Park, Jihyun Suh, Sunghee Kim, Seon-Min Rhee, Myoung-Hee Kim(2008). Immersive Visualization of Casting Solidification by Mapping Geometric Model to Reconstructed Model of Numerical Simulation Result, Journal of Korea Information Processing Society, 15-A(3), pp.141-150

[15] Seon-Min Rhee, Myoung-Hee Kim (2007). Pointing Gesture Recognition with Video Avatar. LNCS4555:  Proceedings of International Human Computer Interaction (HCII 2007), 980-986.  [pdf] [movie]

[14] [ SCI ]  Seon-Min Rhee, Remo Ziegler, Jiyoung Park, Myoung-Hee Kim, Markus Gross (2007). Low-cost Telepresence for Collaborative Virtual Environment. IEEE Transaction on Visualization and Computer Graphics, 13(1), 156-166. [pdf] [movie]

[12] Myoung-Hee Kim, Jiyoung Park, Seon-Min Rhee, and Seong-Won Park (2006). An interactive virtual operating room. Proceedings of the Asian Simulation Conference 2006, 342-346.

[11] Jiyoung Park, Seon-Min Rhee, and Myoung-Hee Kim (2006). Non-intrusive tracking of multiple users in a spatially immersive display. Proceedings of the International Conference on Computer Vision Theory and Applications, 464-467.

2005

[10] [ SCIE ] Yoo-Joo Choi, Soo-Mi Choi, Seon-Min Rhee, and Myoung-Hee Kim (2005). Collaborative and immersive medical education in a virtual workbench environment. LNAI 3683: Proceedings of the 9th International Conference on Knowledge-Based Intelligent Information and Engineering Systems, 3, 1210-1217.
　

[9] Myoung-Hee Kim, Seon-Min Rhee, Jiyoung Park, Ju-Haye Kim, Eun-Cho,and Hyo-Sun You (2005). Interaction-enhanced simulation workspace for immersive collaboration. Proceedings of the Asian Simulation Conference / the 6th International Conference on System Simulation and Scientific Computing, 891-895.
　

domestic journals

[8] Seon-Min Rhee, Jiyoung Park, Myoung-Hee Kim (2005). A Stereo Video Avatar for Supporting Visual Communication in CAVE^TM-like System, Journal of Korea Information Science Society, 33(56), 354-362.

[7] Seon-Min Rhee, Jiyoung Park, Myoung-Hee Kim (2005). A Stereo Video Avatar Using Projective Texture. Journal of Korea Computer Graphics Society, 11(4), 34-38.

[6] Seon-Min Rhee, Jiyoung Park, Myoung-Hee Kim (2005). User Mirroring for Supporting a Telepresence in Collaborative Virtual Environments. Journal of Korea Computer Graphics Society, 11(1), 55-61.

2004

[5] Seon-Min Rhee, Soo-Mi Choi, Doo-Young Kwon (2004). Architectural Design Using Visual and Tactile Guide in the Virtual Table. Journal of Korea Information Science Society, 10(2), 189-198.

2003

[4] Seon-Min Rhee, Eun-Cho, Hyo-Sun You, and Myoung-Hee Kim (2003). Architectural design and simulation in heterogeneous virtual environments. Proceedings of the International Conference on Cyberworlds, IEEE Computer Society, 120-127.
　

domestic journals

[3] Seon-Min Rhee, Soo-Mi Choi, Myoung-Hee Kim (2003). Stereoscopic Visualization of Building Using Horizontal and Vertical Projection System. Journal of Korea Information Processing Society, 10-A(2), 165-172.

[2] [ SCIE ] Myoung-Hee Kim, Soo-Mi Choi, Seon-Min Rhee, Doo-Young Kwon, and Hyo-Sun Kim (2002). A guided interaction approach for architectural design in a table-type VR environment. LNCS 2532: Proceedings of the 3rd IEEE Pacific Rim Conference on Multimedia, 1112-1119.

[1] Helen Hong, Seon-Min Rhee, Soo-Kyung Chin, and Myoung-Hee Kim (2000). Hybrid data intermixing method for surgical simulation. Proceedings of the JSST 2000 International Conference on Modeling, Control and Computation in Simulation, 160-165.