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Multiperspective Thermal IR and Video Arrays for 3D Body Tracking and Driver Activity Analysis

Multiperspective Thermal IR and Video Arrays for 3D Body Tra...

引用

IEEE computer Society Conference on computer vision and Pattern Recognition Workshops (CVPRW)

作者： Shinko Y. Cheng Sangho Park M.M. Trivedi Computer Vision and Robotics Research Laboratory Department of Electrical and Computer Engineering University of California San Diego La Jolla CA USA

This paper presents a multi-perspective (i.e., four camera views) multi-modal (i.e., thermal infrared and color) video based system for robust and real-time 3D tracking of important body *** multi-perspective characteristics of the system provides 3Dtrajectory of the body parts, while the multi-modal characteristics of the system provides robustness and reliability of feature detection and tracking. The application context for this research is that of intelligent vehicles and driver assistance systems. Experimental results demonstrate effectiveness of the proposed system.

关键词： Cameras computer vision Infrared detectors Humans Head Robustness Robot vision systems Image color analysis Real time systems Intelligent vehicles

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Knowledge fusion based object detection in pulmonary radiology

Knowledge fusion based object detection in pulmonary radiolo...

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17th International Conference on Software engineering and Knowledge engineering, SEKE 2005

作者： Chiou, Yun-Shu Peter Cybernetic Research Laboratory Electrical Engineering Department University of Maryland College Park MD 20742 United States Computer and Communications Research Laboratories Industrial Technology Research Institute HsinChu Taiwan

ISBN: (纸本)9781627486590

A knowledge fusion method is developed and applied to pulmonary radiology for cancerous lung nodule detection. The knowledge fusion method improves the speed and accuracy of cancerous lung nodule detection. The improved configuration of Knowledge Fusion based Lung Nodule Detection System (KFLND) includes several phases of processing, (i) pre-processing, in order to capture vision based knowledge from chest radiology;(ii)quick selection of suspected nodule areas (SNAs), in order to transfer human-expert's vision knowledge regarding prominent features of nodule suspects to KFLND;(iii)Feature space determination, to identify non-nodule suspects based on digitalized characteristic of edges vision knowledge thereby reduces the number of SNAs;(iv) Neural network reduction of the number of SNAs;and (v) interactive nodule classification, knowledge extraction and fusion. Preliminary results show that this detection system is able to identify true nodule at accuracy up to 97% with area under the ROC curve of 0.9378.

关键词： Feature extraction

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Pose-robust face recognition using geometry assisted probabilistic modeling

Pose-robust face recognition using geometry assisted probabi...

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Conference on computer vision and Pattern Recognition (CVPR)

作者： Xiaoming Liu Tsuhan Chen General Electric Global Research Center Visualization and Computer Vision Laboratory Schenectady NY USA Advanced Multimedia Processing Lab Department of Electrical and Computer Engineering Carnegie Mellon University Pittsburgh PA USA

ISBN: (纸本)0769523722

researchers have been working on human face recognition for decades. Face recognition is hard due to different types of variations in face images, such as pose, illumination and expression, among which pose variation is the hardest one to deal with. To improve face recognition under pose variation, this paper presents a geometry assisted probabilistic approach. We approximate a human head with a 3D ellipsoid model, so that any face image is a 2D projection of such a 3D ellipsoid at a certain pose. In this approach, both training and test images are back projected to the surface of the 3D ellipsoid, according to their estimated poses, to form the texture maps. Thus the recognition can be conducted by comparing the texture maps instead of the original images, as done in traditional face recognition. In addition, we represent the texture map as an array of local patches, which enables us to train a probabilistic model for comparing corresponding patches. By conducting experiments on the CMU PIE database, we show that the proposed algorithm provides better performance than the existing algorithms.

关键词： Face recognition Geometry Solid modeling Ellipsoids Humans Lighting Head Testing Surface texture Image recognition

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Online modeling and tracking of pose-varying faces in video

Online modeling and tracking of pose-varying faces in video

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Conference on computer vision and Pattern Recognition (CVPR)

作者： X. Liu T. Chen General Electric Global Research Center Visualization and Computer Vision Laboratory Schenectady NY USA Advanced Multimedia Processing Lab Department of Electrical and Computer Engineering Carnegie Mellon University Pittsburgh PA USA

ISBN: (纸本)0769523722

We propose a face mosaicing approach to model both the facial appearance and geometry from pose-varying videos, and apply it in face tracking and recognition. The basic idea is that by approximating the human head as a 3D ellipsoid, multi-view face images can be back projected onto the surface of the ellipsoid, and the surface texture map is decomposed into an array of local patches. During the online modeling process, the position and pose of the first frame is assumed to be known for a given video sequence. For each frame in the sequence, the algorithm estimates the face-position and pose, and generates a texture map, which is further utilized in updating the mosaic model.

关键词： Face recognition Solid modeling Geometry Ellipsoids Face detection Video sequences computer vision Humans Lighting Head

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Terahertz imaging system performance model for concealed weapon identification

Terahertz imaging system performance model for concealed wea...

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Technologies for Optical Countermeasures II;Femtosecond Phenomena II;and Passive Millimetre-Wave and Terahertz Imaging II

作者： Murrill, Steven R. Jacobs, Eddie L. Moyer, Steven K. Halford, Carl E. Griffin, Steven T. De Lucia, Frank C. Petkie, Douglas T. Franck, Charmaine C. Army Research Laboratory Adelphi MD United States Night Vision and Electronic Sensors Directorate Fort Belvoir VA United States Department of Electrical and Computer Engineering University of Memphis Memphis TN United States Department of Physics Ohio State University Columbus OH United States Department of Physics Wright State University Dayton OH United States Science Applications International Corporation Fort Belvoir VA United States

The U.S. Army Night vision and Electronic Sensors Directorate and the U.S. Army research laboratory have developed a terahertz-band imaging system performance model for detection and identification of concealed weaponry. The MATLAB-based model accounts for the effects of all critical sensor and display components, and for the effects of atmospheric attenuation, concealment material attenuation, and active illumination. The model is based on recent U.S. Army NVESD sensor performance models that couple system design parameters to observer-sensor field performance using the acquire methodology for weapon identification performance predictions. This THz model has been developed in support of the Defense Advanced research Project Agencies' Terahertz Imaging Focal-Plane-Array Technology (TIFT) program and is presently being used to guide the design and development of a 0.650 THz active/passive imaging system. This paper will describe the THz model in detail, provide and discuss initial modeling results for a prototype THz imaging system, and outline plans to validate and calibrate the model through human perception testing.

关键词： Imaging techniques

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Integrated Process for Measurement of Free-Form Automotive Part Surface Using a Digital Area Sensor

Integrated Process for Measurement of Free-Form Automotive P...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Quan Shi Ning Xi Heping Chen Yifan Chen Electrical and Computer Engineering Department Michigan State University East Lansing MI USA Scientific Research Laboratory Ford Motor Company Laboratory Dearborn MI USA

This paper introduces a fully automated dimensional inspection (ADI) system using a digital area sensor. Instead of measuring a part surface point-by-point using a Coordinate Measuring Machine (CMM), an ADI system can measure a part surface patch-by-patch. Therefore, the inspection time can be significantly reduced. Many existing sensor planners were developed for one or two cameras. In the proposed ADI system, the sensor planner is developed for a digital area sensor, which is made by a CCD camera and a digital projector. In application, sensor viewpoints are estimated automatically. On each viewpoint, thousands of points on part surfaces can be measured in only several seconds.

关键词： Area measurement Automotive engineering Sensor systems Inspection Coordinate measuring machines Strategic planning Robot vision systems Charge coupled devices Digital cameras Charge-coupled image sensors

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Active and passive millimeter and sub-millimeter-wave imaging

Active and passive millimeter and sub-millimeter-wave imagin...

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Technologies for Optical Countermeasures II;Femtosecond Phenomena II;and Passive Millimetre-Wave and Terahertz Imaging II

作者： Petkie, Douglas T. De Lucia, Frank C. Casto, Corey Helminger, Paul Jacobs, Eddie L. Moyer, Steven K. Murrill, Steve Halford, Carl Griffin, Steve Franck, Charmaine Department of Physics Wright State University Dayton OH United States Department of Physics Ohio State University Columbus OH United States Department of Physics University of South Alabama Mobile AL United States Night Vision and Electronic Sensors Directorate Fort Belvoir VA United States Army Research Laboratory Adelphi MD United States Department of Electrical and Computer Engineering University of Memphis Memphis TN United States Science Applications International Corporation United States

We have developed several millimeter/submillimeter/terahertz systems to study active and passive imaging and associated phenomenology. For measuring the transmission and scattering properties of materials, we have developed a dual rotary stage scattering system with active illumination and a Fourier Transform spectrometer. For imaging studies, we have developed a system based on a 12-inch diameter raster-scanned mirror. By interchange of active sources and both heterodyne and bolometric detectors, this system can be used in a variety of active and passive configurations. The laboratory measurements are used as inputs for, and model calibration and validation of, a terahertz imaging system performance model used to evaluate different imaging modalities for concealed weapon identification. In this paper, we will present examples of transmission and scattering measurements for common clothing as well as active imaging results that used a 640 GHz source and receiver.

关键词： Imaging techniques

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A method and technical equipment for an acute human trial to evaluate retinal implant technology

A method and technical equipment for an acute human trial to...

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作者： Hornig, Ralf Laube, Thomas Walter, Peter Velikay-Parel, Michaela Bornfeld, Norbert Feucht, Matthias Akguel, Harun Rössler, Gernot Alteheld, Nils Notarp, Dietmar Lütke Wyatt, John Richard, Gisbert IIP Technologies GmbH Bonn Germany Department of Ophthalmology Duisburg-Essen University Essen Germany Department of Ophthalmology RWTH Aachen University Aachen Germany Department of Ophthalmology University of Vienna Vienna Austria Department of Ophthalmology University of Hamburg Hamburg Germany Department of Electrical Engineering and Computer Science Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA United States

This paper reports on methods and technical equipment to investigate the epiretinal stimulation of the retina in blind human subjects in acute trials. Current is applied to the retina through a thin, flexible microcontact film (microelectrode array) with electrode diameters ranging from 50 to 360 μm. The film is mounted in a custom-designed surgical tool that is hand-held by the surgeon during stimulation. The eventual goal of the work is the development of a chronically implantable retinal prosthesis to restore a useful level of vision to patients who are blind with outer retinal degenerations, specifically retinitis pigmentosa and macular degeneration. © 2005 IOP Publishing Ltd.

关键词： Neurology

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Real time head tracking via camera saccade and shape-fitting

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2nd International Conference on Image Analysis and Recognition, ICIAR 2005

作者： Zhang, Jason Z. Lu, Ye Wu, Q.M. Jonathan Micro-technology and Sensing Group Institute for Fuel Cell Innovation National Research Council of Canada Vancouver BC V6T 1W5 Canada Vision and Media Laboratory School of Computing Science Simon Fraser University Burnaby BC V5A 1S6 Canada Department of Electrical and Computer Engineering University of Windsor Ont. N9B 3P4 Canada

ISBN: (纸本)3540290699

This paper presents a system that tracks human heads in real-time under unconstrained environments where target occlusion, varying illumination, and cluttered backgrounds exist. Tracking is formulated as an active visual servo problem based on the integration of a saccade and a smooth pursuit processes. The head is modelled as an ellipse computed from the color clusters of candidate targets using a robust least square ellipse fitting algorithm. The Farnsworth Perceptually Uniform Color Model is employed to represent the color information of the visual objects. Kalman filtering is applied to the head ellipse to track the evolution of the position, size, and orientation of the target such that the occlusion of objects with similar color and shape as those of the target are effectively accommodated. Experiments with tracking scenarios demonstrate the effectiveness of the system. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Tracking (position)

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A human-centered semantic navigation system for indoor environments

A human-centered semantic navigation system for indoor envir...

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IEEE/ACS International Conference on Pervasive Services (ICPS)

作者： V. Tsetsos C. Anagnostopoulos P. Kikiras P. Hasiotis S. Hadjiefthymiades Pervasive Computing Research Group Communication Networks Laboratory Department of Informatics & Telecommunications University of Athens (NKUA) Athens Greece Electronic Sensors Laboratory Department of Electrical & Computer Engineering National and Technical University of Athens Greece

In this paper we discuss the very important issue of indoor location services. Location services have been in use, and studied, for a long time in mobile networks. With the proliferation of wireless networking technologies, users are mostly interested in advanced services that render the surrounding environment (i.e., the building) highly intelligent and significantly facilitate user activities (pervasive computing paradigm). Our focus is on navigation, one of the most important location services. Existing approaches for indoor navigation are driven by geometric information and neglect important aspects like the semantics of points/areas and user preferences. The derived applications are not intelligent enough to catalytically contribute to the pervasive computing vision. In this paper, a novel navigation mechanism is introduced. Such navigation scheme is enriched with user profiles and the adoption of an ontological framework. These enhancements introduce a series of technical challenges that are extensively discussed throughout the paper.

关键词： Navigation Indoor environments Ontologies Pervasive computing computer networks Telecommunication computing Space technology Communication networks Laboratories Informatics

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