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IEEE Symposium on Intelligent Vehicle

作者： J.C. McCall S.P. Mallick M.M. Trivedi Computer Vision and Robotics Research Laboratory Department of Electrical and Computer Engineering University of California San Diego USA

This paper deals with the development of novel sensory systems and interfaces to enhance the safety of a driver who may be using a cell phone. It describes a system for real time affect analysis and Tele-viewing in order to bring the context of the driver to remote users. The system is divided into two modules. The affect recognition module recognizes six emotional states of the driver. The face-modeling module generates a 3D model of the driver's face using two images and synthesizes the emotions on it. Depending on bandwidth, either a raw video, 3D warped model, or an iconic representation is sent to the remote user.

关键词： Real time systems Cellular phones Face detection Hidden Markov models Tracking loops Safety Emotion recognition Bandwidth Image reconstruction computer vision

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Positivistlc tendencies due to engineering education 6

Positivistlc tendencies due to engineering education

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6th IFAC Symposium on Advances in Control Education, ACE 2003

作者： Erden, Mustara Suphi Department of Electrical and Electronics Engineering Computer Vision and Intelligent Systems Laboratory Middle East Technical University Ankara Turkey

In this research it is claimed that engineering education increases the positivistic tendencies of students regarding to the social problems. A theoretical background is given in the introduction and literature review. Two hypotheses are constructed and a micro-questionnaire survey is performed to test the hypotheses. In the survey positivistic tendencies of engineering students and social science students are compared. The results are depicted and discussed in detail. One of the hypotheses was approved by the results while the other was rejected. It is concluded that the rejected hypothesis was not in accordance with the claim since it overlooked some factors effecting positivism. The results of the survey support the claim by stating that 'engineering students are more positivist than social science students'. Copyright © IFAC Advances in Control Education Oulu, Finland, 2003

关键词： Students

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Parametric face modeling and affect synthesis

Parametric face modeling and affect synthesis

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IEEE International Conference on Multimedia and Expo (ICME)

作者： S.P. Mallick M. Trivedi Department of Electrical and Computer Engineering Computer Vision and Robotics Research University of California San Diego USA

In this paper, we present a fast algorithm for automatically generating a 3D model of a human face and synthesizing affects on it. This work is a step towards low bandwidth virtual tele-presence using avatars. The idea is to generate a 3D model of a person's face and animate different emotions on the face at a remote observer's end, thus eliminating the need to send raw video. This research is part of a larger project, which deals with development of novel sensory systems and interfaces to enhance safety of a driver. The proposed algorithm uses a stereo pair of images of a driver's face and creates a 3D mesh model by deforming and texture mapping a predefined 3D mesh.

关键词： Facial animation Avatars Displays Cameras Skin Mathematical model Face detection Humans Bandwidth Calibration

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Real-time stereo-based vehicle occupant posture determination for intelligent airbag deployment

Real-time stereo-based vehicle occupant posture determinatio...

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IEEE Symposium on Intelligent Vehicle

作者： T.D. Schoenmackers M.M. Trivedi Department of Electrical and Computer Engineering Computer Vision and Robotics Research Laboratory University of California San Diego La Jolla CA USA

From 1990 to April 2002, according to the National Highway Traffic Safety Administration (NHTSA), airbag deployment has been responsible for 208 deaths in low-severity crashes. Of these deaths, 107 were children between the ages of 1 and 11, 22 were infants, and 32 were women under the height of five feet two inches. In addition to deaths, airbags are responsible for many more incidental injuries and broken bones. These injuries could be avoided if the system had an accurate model of the actual pose of the occupant. This paper discusses a system we are developing to accurately determine the position of the head, torso, and arms of the front-seat occupant of a vehicle.

关键词： Intelligent vehicles Head Intelligent robots US department of Transportation Pediatrics Injuries Torso Intelligent sensors Road vehicles Vehicle safety

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Driver's view and vehicle surround estimation using omnidirectional video stream

Driver's view and vehicle surround estimation using omnidire...

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IEEE Symposium on Intelligent Vehicle

作者： K.S. Huang M.M. Trivedi T. Gandhi Computer Vision and Robotics Research (CVRR) Laboratory Department of Electrical and Computer Engineering University of California San Diego La Jolla CA USA

Our research is focused on the development of novel machine vision based telematic systems, which provide non-intrusive probing of the state of the driver and driving conditions. In this paper we present a system which allows simultaneous capture of the driver's head pose, driving view, and surroundings of the vehicle. The integrated machine vision system utilizes a video stream of full 360 degree panoramic field of view. The processing modules include perspective transformation, feature extraction, head detection, head pose estimation, driving view synthesis, and motion segmentation. The paper presents a multi-state statistical decision models with Kalman filtering based tracking for head pose detection and face orientation estimation. The basic feasibility and robustness of the approach is demonstrated with a series of systematic experimental studies.

关键词： Vehicle driving Streaming media Magnetic heads Machine vision Face detection Telematics Feature extraction Motion detection Motion estimation Motion segmentation

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Kernel snakes: non-parametric active contour models

Kernel snakes: non-parametric active contour models

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IEEE International Conference on Systems, Man and Cybernetics

作者： W. Abd-Almageed C.E. Smith S. Ramadan Robotics Artificial Intelligence and Vision Laboratory Department of Electrical and Computer Engineering University of New Mexico Albuquerque NM USA

In this paper, a new non-parametric generalized formulation to statistical pressure snakes is presented. We discuss the shortcomings of the traditional pressure snakes. We then introduce a new generic pressure model that alleviates these shortcomings, based on the Bayesian decision theory. Non-parametric techniques are used to obtain the statistical models that drive the snake. We discuss the advantages of using the proposed non-parametric model compared to other parametric techniques. Multi-colored-target tracking is used to demonstrate the performance of the proposed approach. Experimental results show enhanced, real-time performance.

关键词： Kernel Active contours Deformable models Image edge detection Intelligent robots Robot vision systems Artificial intelligence Laboratories Bayesian methods Decision theory

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Positivistic Tendencies Due to engineering Education

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IFAC Proceedings Volumes 2003年第10期36卷 117-122页

作者： Mustafa Suphi Erden Department of Electrical and Electronics Engineering Computer Vision and Intelligent Systems Laboratory Middle East Technical University Ankara Turkey

In this research it is claimed that engineering education increases the positivistic tendencies of students regarding to the social problems. A theoretical background is given in the introduction and literature review. Two hypotheses are constructed and a micro-questionnaire survey is performed to test the hypotheses. In the survey positivistic tendencies of engineering students and social science students are compared. The results are depicted and discussed in detail. One of the hypotheses was approved by the results while the other was rejected. It is concluded that the rejected hypothesis was not in accordance with the claim since it overlooked some factors effecting positivism. The results of the survey support the claim by stating that ’engineering students are more positivist than social science students’.

关键词： Education engineering Education Social Science Education Positivism Ideology Questionnaire Survey

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Textual message read by a mobile robot

Textual message read by a mobile robot

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IEEE International Workshop on Intelligent Robots and Systems (IROS)

作者： D. Letourneau F. Michaud J.-M. Valin C. Proulx Department of Electrical Engineering and Computer Engineering Universite de Sherbrooke LABORIUS - Research Laboratory on Mobile Robotics and Intelligent Systems Sherbrooke Quebec CANADA

Giving the ability to read characters and symbols is highly desirable for increased autonomy of mobile robots operating in the real world. The idea is fairly simple: give a robot the ability to acquire an image of a message to read, extract the symbols and recognize them. Image character recognition research has been going on for decades now, with good results. But compared to conventional character recognition systems, the challenge with a mobile robot is to find a textual message to capture in the world and to get a good view of the message, knowing that the viewpoint of the robot depends on its position in relation to the message, which cannot be pre-specified. In this paper we present our approach making it possible for an autonomous mobile robot to read messages. We outline the constraints under which the approach works, and present results obtained using a Pioneer 2 robot equipped with a Pentium 233 MHz and a pan-tilt-zoom camera.

关键词： Mobile robots Robot vision systems Cameras Intelligent robots Character recognition Image recognition Navigation Laboratories Mobile computing Intelligent systems

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Pattern and probe-based aberration monitors for the human eye

Journal of Vacuum Science & Technology B: Microelectronics a...

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Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena 2003年第6期21卷 2922-2925页

作者： Garth Robins Andrew Neureuther Department of Electrical Engineering and Computer Sciences Electronics Research Laboratory University of California Berkeley California 94720

A pattern and interferometric probe method is described for measuring aberrations in the human eye. Both subjective (human reporting) and objective (external measurement) embodiments are suggested. Simulation studies of targets are given for defocus, astigmatism, coma and trifoil. The results for the simultaneous presence of these aberrations at a combined Strehl ratio of 0.67 indicate that the aberration levels could likely each be individually quantified to an accuracy of 0.02λ rms waves such that the vision could be improved to a Strehl ratio of 0.94.

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Video reconstructions in dentistry

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Orthodontics and Craniofacial research 2003年第SUPPL1期6卷 108-116页

作者： Farag, A.A. Eid, A. Electrical and computer Engineering Department University of Louisville Computer Vision and Image Processing Laboratory Louisville KY 40292 United States

Objectives: To present two practical techniques for threedimensional (3D) modeling of the human jaw from a sequence of intra-oral images. Design: A data acquisition system consists of: 3D digitizing arm, CCD camera and a laser projector in addition to a software module of two 3D modeling techniques;shape from shading (SFS) and space carving (SC). Setting and sample population - Several experiments have been conducted on a sample of students at the computer vision and Image Processing (CVIP) laboratory at the University of Louisville, Louisville, KY. Other experiments were performed on solid models of human jaw. Experimental variable: The SFS technique, using perspective projection and camera calibration, extracts the 3D information from a sequence of two-dimensional images of the jaw. Data fusion of range data and 3D registration techniques develop the complete jaw model. The SC approach is implemented on a sequence of calibrated images. On the two reconstructions, we fit a mesh model to the data, in order to create a solid 3D model. Outcome measure: The accuracy of the reconstructed 3D model of human jaw is calculated based on the measurements on real jaws. Results: The SFS-based technique seems to provide more faithful information about the shape of the tooth tops. However, the SC algorithm successfully reconstructed 3D models of the human jaw with sub-millimeter accuracy, which is as accurate as (or even better than) the first technique without using any range measurements or laser projectors. The average error in distance calculation was found to be 0.74 mm, which is an acceptable resolution for many orthodontics and maxillofacial applications. Conclusion: Accurate 3D reconstruction of the human jaw enables many orthodontics and dental imaging researchfindings to be applied directly to a digital jaw model - not to a cast - using computer vision and medical imaging tools. © 2003 Blackwell Munksgaard.

关键词： Data fusion Jaw modeling Registration Shape from shading Space carving

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