Dr.-Ing. Jörg Velten
|Telefon:||+49 (0)202 439 1811|
A multidimensional wave digital filter bank for video-based motion analysisMultidimensional Systems and Signal Processing, 25(2):295 - 311
Insufficiencies of Practical BIBO Stable n-D SystemsMultidimensional Systems and Signal Processing, 25:3 - 15
Schlüsselwörter: multidimensional digital filters, multidimensional systems, Stability
Tomographical object detection using a reduced number of projection angles
of the 8th International Workshop on Multidimensional (nD) Systems (nDS'13) , Seite 181 - 186.
Density Measurements from a Top-View Position using a Time-of-Flight Camera
of the 8th International Workshop on Multidimensional (nD) Systems (nDS'13) , Seite 193 - 198.
Automatic Privacy Protection Based on Haar Cascades and Spectral Domain Watermarking
of the 8th International Workshop on Multidimensional (nD) Systems (nDS'13) , Seite 199 - 204.
Zusammenfassung: A new system for automatic privacy protection in digital media, based on Haar cascades and spectral domain watermarking is described in the present paper. In a first step faces are detected by means of Haar cascades. Integral images are used to speed up calculations and the detection. Multiple detections of one face are combined. Succeeding steps comprise embedding the data into the image using spectral domain methods and deleting the area of privacy. An extended Discrete Haar Transformation is developed to transform arbitrary matrices. A Spread Spectrum method is used to embed the size and position of the faces into the cover image. Different methods for embedding regarding their fidality and performance are compared. Additionally the performance of the methods after cropping the images is presented.
Camera Based Object Position Estimation for Mobile Devices
of the 8th International Workshop on Multidimensional (nD) Systems (nDS'13) , Seite 175 - 180.
Evaluation of the Lens Distortion Errors in 2-D Image to 3-D World Coordinate Projections
of the 8th International Workshop on Multidimensional (nD) Systems (nDS'13) , Seite 187 - 191.
Feature Recycling Cascaded SVM Classifier Based on Feature Selection of HOGs for Pedestrian Detection
in 6th International Conference on Multimedia Communications, Services and Security ( MCSS'13) , Seite 82 - 94.
People Detection and Tracking from a Top-View Position Using a Time-of-Flight Camera
in 6th International Conference on Multimedia Communications, Services and Security (MCSS'13) , Seite 213 - 223.
Tomographical scene reconstruction in the active safety car project
of the 15th International IEEE Conference on Intelligent Transportation Systems (ITSC'12) , Seite 307 -312.
Schlüsselwörter: active safety car project, automobiles, Biomedical imaging, camera based measurements, cameras, driver assistance systems, driver information systems, driveway monitoring, Image reconstruction, radiographing, road safety, Signal processing algorithms, tomographical background information, tomographical scene reconstruction algorithm, Tomography, Vehicles, view camera, visual light rays, Visualization
Sensor system blockage detection for night time headlight control based on camera and radar sensor information
of the 15th International IEEE Conference on Intelligent Transportation Systems (ITSC'12) , Seite 78 - 83.
Schlüsselwörter: Head light detection, Radar and camera sensor fusion, Sensor data fusion
Zusammenfassung: Driver assistance systems support overstrained and affected drivers and become more and more essential for series-production vehicles. In this paper a procedure for detection of a misaligned or blocked sensor system, including a radar and a camera sensor, will be introduced. It is important to inform the driver if an automatic headlight control is working reliable, in other words without limitations caused by external influence (e.g. dirt on the windscreen). The blockage detection algorithm is based on the fusion result of electronic radar measurements and a vision based head- and taillight detection algorithm. Results of the blockage detection algorithm are evaluated on misaligned measurements and online in a vehicle test system.
Realization of multidimensional signal processing systems given in natural k-D state space descriptionMultidimensional Systems and Signal Processing, 23(1-2):281 - 290