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Function-based Shape Modeling and Visualization | ||||
We use mathematical definitions or procedural representation to define geometry, visual appearance and physical properties of virtual objects. We work with FReps, algebraic surfaces, implicit surfaces, CSG solids, volumetric objects, as well as parametric curves, surfaces and solids. We have developed FVRML/FX3D — function-based extension of Virtual Reality Modeling Language (VRML) and Extensible 3D (X3D) which allows for using mathematical formulas and function scripts straight in the codes of VRML and X3D for defining practically any type of geometry, appearance as well as physical properties. We are also developing a multiplatform interactive modelling tool ShapeExplorer for teaching and research on function-based computer graphics and visualization. |
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New Human-Computer Interaction | ||||
We add new modality to common interactive shape modelling and virtual prototyping and allow for combining visual, audio, haptic and free-hand interactions in virtual environments and simulations. Hand motion is captured by different ways using haptic and optical tracking devices. We design and implement a set of robust and efficient interactive hand gestures suitable for various engineering designs (virtual prototyping) and crafts (freeform shape modelling). We simulate existing hand-made assembling and modelling processes so that the required motor skills can be both trained and applied in the simulations. We also work on new ways evaluating the quality of interaction experience. |
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Sound of Geometry and Geometry of Sound, Immersive Geometry | ||||
This project studies problems of abstract data sonification including various aspects of using AI for creating and processing sound in human-computer interaction and data analysis. We perform research in the following directions: |
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Cyberworlds | ||||
Created intentionally or spontaneously, cyberworlds are information spaces and communities that immensely augment the way we interact, participate in business and receive information throughout the world. They seriously impact our lives and the evolution of the world economy by taking such forms as social networking services, 3D shared virtual communities and massively multiplayer online role-playing games. The first Workshop on Synthetic Worlds was organized by late Professor T.L. Kunii in 1993 (University of Aizu, Japan) with the proceedings published in a book Cyberworlds (Springer). Since 2003, I am coordinating the annual International Conferences on Cyberworlds. |
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| Past Projects | |||||
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Feasibility Study on Automatic Detection of Anomalies in the Captured Images with Limited Training Data | ||
We devised an AI algorithm which, based on a limited number of mages of the surfaces of pharma tanks that are free of anomalies, is able to identify images with anomalies and /2/ locate anomalies within the images. |
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Automatic Optical Inspection | ||
Funded by Delta-NTU Corporate lab, we investigated theory and practice of building a generic framework for the Automatic Optical Inspection of electronic components based on deep learning methods which work for different types of components and defects in the production line. |
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Tangible Images and Haptic Video Comunication | ||
We added haptic interaction modality to visual rendering and common video communication across the internet. Haptic forces are either retrieved from images or video or efficiently exchanged as asynchronous data streams across the internet. |
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Interactive Free-form Shape Modeling | ||
Interactive modification of the function model with
concurrent visualization of the respective part of it lets us provide both
the interactivity and any required level of detail leading to
photo-realistic appearance of the resulting shapes. Refer to Function-based Shape Modeling project. |
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Function Representation (FRep) | ||
This method proposes that geometric shapes are
represented with the inequality f(x,y,z)≥0,
where the value of the real function f is positive for the points inside the shape, equal to
zero on its border and negative outside the shape. Refer to Function-based Shape Modeling project. |
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Interactive Segmentation of MRI Brain Data | ||
Novel visualization algorithms developed specifically for
segmentation purposes have been proposed along with a method for 3D
interactive haptic correction of brain segmentation errors introduced by the
fully automatic segmentation algorithms. |
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Scientific Visualization | ||
3D visualization of the
electroencephalograms shows how the electrical signal changes through
time. Its size and appearance visually reflect the
brain activity. We developed an interactive program which
visualizes the signals as time-dependent
3D surfaces around the 3D human head. |
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Virtual Orthopedic Surgery Training | ||
While
currently available VR surgery systems usually require expensive hardware
and software, we developed a desktop VR orthopedic surgery training system
that can run on commonly available personal computers. Refer to Tangible Images and Haptic Video Comunication project. |
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Parallel Computing for Visualization and Shape Modeling | ||
Parallel
computing is used for computer animation rendering and interactive shape
modeling based on using implicit functions. We have also devised and
implemented a loseless 3D compression algorithm that enables for
transferring across the Internet gigabytes of data. |
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Virtual Campus | |||
Virtual
Campus is a shared collaborative VRML model of the campus of Nanyang
Technological University in Singapore. It can be
accessed from any Internet-connected personal computer running MS Windows. This project continues as Cyberworlds project. |
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Completed Funded Projects:
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