Research Projects
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- 3D Computer Vision 3D reconstruction Aerial Vision Augmented Reality Augmented Video Best Paper Award Biometrics Caleydo Computer Graphics Computer Vision Convex Optimization Coordinate transformations detection face Fingerprint Georeferencing GPU GUI HOG Human Computer Interaction Image Labelling Industrial Applications Information Visualization integral imaging Interaction Interaction Design Machine Learning Medical computer vision Medical Visualization Mixed Reality Mobile computing Mobile phone Model Multi-Display Environments Multiple Perspectives Object detection Object recognition Object reconstruction Object Tracking On-Line Learning Robotics Segmentation Shape analysis shape from focus SLAM Software Projects Structure from Motion Surveillance SVM Symmetry Tracking Fusion Tracking, Action Recognition User Interfaces Variational Methods Virtual reality and augmented reality Visual Tracking Visualization
| Title | Abstract |
Start
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|---|---|---|---|
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3D Reconstruction of Electrical Impulse Discharges
(details) |
Electrical impulse discharges in nature are visible as lightning. Their impact point can be electro magnetically located up to a precision of several hundred meters. In some restricted areas such as industrial plants, airports etc. it desirable to know the the impact region and path of the lightning up to a precision of a few meters. If visibility is not too restricted by weather conditions, a multi-camera setup would be a viable option to locate path and impact area of the discharge. In this project impulse discharges of a few meters are synthetically generated under laboratory conditions and reconstructed using a multi camera setup. |
2007 | 2008 |
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A Low-Cost System for Automatic People Tracking in a Labyrinth
(details) |
After medical treatment of visually handicapped people it is desirable to evaluate the benefit of the treatment for the patient. Especially the capability of the patient to orient himself in a three-dimensional environment, to navigate and recognize obstacles is of interest. For a clinical evaluation under controlled circumstances a labyrinth has been built through which the patient ha to navigate. Obstacles may be randomly placed in the labyrinth. A multi-camera system keeps track of the patients movements and extracts parameters such as position, speed, head rotation etc. |
2006 | 2007 |
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Measuring Material Displacement on Steel Specimens During Strain Tests
(details) |
Deformation analysis of material surfaces is a crucial part of material testing and quality control. In this project a stereoscopic surface measurement system has been developed which allows to measure surface deformation during stress/strain tests over a wide range of fields of view. Stereo image pairs are acquired at specified time instances which makes it possible to synchronize the acquisition with the amount of stress applied. |
2005 | 2006 |
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Vision Based Kinematic Calibration and Error Compensation of Articulated Robot Arms
(details) |
Development of a vision system for accurate calibration of the kinematic chain of an articulated robot arm. The absolute positioning error of articulated robot arms is typically by an order of ten higher than their repeatability error. Inaccurate blueprint kinematic models typically account for 90% of this discrepancy. In this work a calibration procedure is developed which calibrates the kinematic model of a robot arm using fixed stereo rig and a calibration target mounted on the robot hand. In a single calibration framework the following parameters are automatically determined:
The procedure is fully automatic and does not require expensive, precalibrated equipment. |
2005 | 2006 |
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Vision Based Detection of Wrong-Way Drivers
(details) |
Vehicles driving the wrong way down a motorway represent a serious source of danger. In the year 2005 in Austria, 521 vehicles were counted driving in the wrong direction on motorways. 8 people died due to wrong-way driver accidents. Immediate detection of a vehicle driving in the wrong direction could help preventing serious accidents by warning the oncoming vehicles (via traffic telematic systems or radio announcements) and by alarming the police. To guarantee immediate detection, one would have to observe every access ramp and every place where a car could turn. Thus a low-cost monitoring system capable of detecting wrong-way drivers and forwarding an alarm to a central traffic control station is needed. Image based detection suffers from one main problem: In case a large vehicle (truck, bus etc.) throws a shadow to the opposite lane of a motorway, that shadow moves against the direction of traffic and may cause a false detection. With a monocular camera system (one single camera), this problem can only be eliminated by large computational costs. |
2005 | 2007 |
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Dust Filter Surface Analysis
(details) |
When a dust laden gas is sucked through a filter, the dust remains on its surface and forms a compact dust layer called filter cake. Periodically the filter cake is at least partially removed by inverse high pressure air pulses to allow continuous operation of the filter. Knowledge of the distribution of the filter cake on the filter surface at different stages of operation is decisive for filter operation. It is shown that the principle of calibrated shape from stereo with pattern projection for generating texture on the surface gives a robust 3D reconstruction of the filter surface when accessing through a glass window. Rigid registration of surface patches using landmark points, combined with an Iterative Closest Point Algorithm as a refinement procedure gives a continuous 3D model of the entire visible filter surface. Cake thickness is calculated by taking the height difference of two surface models, acquired before and after dust deposition. The challenging problem is to account for the non-rigid deformation of the filter cloth. A global deformation model is estimated using Thin Plate Spline Interpolation based on landmark points on the filter surface. |
2004 | 2005 |
