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Harris, SIFT and SURF features comparison for vehicle localization based on virtual 3D model and camera

Harris, SIFT and SURF features comparison for vehicle locali...

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3rd international conference on Image processing Theory, Tools and Applications (IPTA)

作者： Dawood, Maya Cappelle, Cindy El Najjar, Maan E. Khalil, Mohamad Pomorski, Denis Univ Lille Nord France LAGIS CNRS UMR 8219 Lille France

ISBN: (纸本)9781467325851;9781467325837

This paper proposed a new vehicle geo-localization method in urban environment integrating a new source of information that is a virtual 3D city model. This 3D model provides a realistic representation of the navigation environment of the vehicle. To optimize the performance of vehicle geo-localization system, several sources of information are integrated for their complementarity and redundancy: a GPS receiver, proprioceptive sensors (odometers and gyrometer), a video camera and a virtual 3D city model. The pose estimation algorithm used to fuse the different sensors data is an IMM-UKF (Interacting Multiple Model - Unscented Kalman Filter). The proprioceptive sensors allow to continuously estimating the dead-reckoning position and orientation of the vehicle. This dead-reckoning estimation of the pose is corrected by GPS measurements. Moreover, a 3D model/camera based observation of the vehicle pose is constructed to compensate the drift of the dead-reckoning localization when GPS measurements are unavailable for a long time. This pose observation is based on the matching between the virtual image extracted from the 3D city model and the real image acquired by the camera. The observation construction is composed of two major parts. The first part consists in detecting and matching the feature points of the real and virtual images. Three features are compared: Harris corner, SIFT (Scale Invariant Feature Transform) and SURF (Speed Up Robust Features). The second part is the pose computation using POSIT algorithm and the previously matched features set. The developed approach has been tested on a real sequence and the obtained results proved the feasibility and robustness of the approach.

关键词： Vehicle localization GPS Camera Virtual 3D City Model data Fusion and Registration Image processing

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ICSESS 2012 - Proceedings of 2012 IEEE 3rd international conference on Software Engineering and Service Science

ICSESS 2012 - Proceedings of 2012 IEEE 3rd International Con...

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2012 IEEE 3rd international conference on Software Engineering and Service Science, ICSESS 2012

ISBN: (纸本)9781467320054

The proceedings contain 192 papers. The topics discussed include: the research of the fuzzy cluster algorithm for indoor location based on RSSI;non-embedded audio watermark based on wavelet transform;analysis and improvement for MDS localization algorithm;distributed load balancing allocation of virtual machine in cloud data center;an improved P AM algorithm for optimizing initial cluster center;a zero-watermarking algorithm for relational database copyright protection;the application of digital signal processing (DSP) for the real time solving of artillery fire control exterior trajectory;a distributed futures program trading platform based on middleware;semantic query expansion method for food safety domain;based on social network crime organization relation mining and central figure determining;and improving generalization of parzen density estimation by fuzzy C-means clustering.

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Application of VC++ and MATLAB Mixed-Programming Based on MATCOM in signal processing

Application of VC++ and MATLAB Mixed-Programming Based on MA...

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3rd international conference on Engineering Design and Optimization, ICEDO 2012

作者： Zhang, Long Zeng, Guoying Zhao, Dengfeng Zeng, Hongqiang School of Manufacturing Science and Engineering Southwest University of Science and Technology Mianyang Sichuan Province 621010 China

ISBN: (纸本)9783037854822

By research of the mix technology of VC++ and Matlab based on Matcom software, the insufficiencies of data processing in VC++ and visual programming in Matlab have been sloved effectively in signal processing. The own definition functions by matlab can be converted to the C code with Matcom,then the functions can be called anywhere if you *** this mix technology, the vibration signals collected by UA307 data acquisition card have been transformed by FFT and the results are consistent with Matlab's. The mixed-program can operate independently without Matlab software and this method is a good reference to the development of the signal processing system. © (2012) Trans Tech Publications, Switzerland.

关键词： signal processing

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data acquisition for output signal of linear CCD

Data acquisition for output signal of linear CCD

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3rd international conference on Mechanical and Electronics Engineering (ICMEE 2011)

作者： Xu Guosheng Weifan Univ Weifang 261061 Peoples R China

ISBN: (纸本)9783037852866

In order to improve the precision, speed, integration and reliability of the linear CCD system, A method of data acquisition for high resolution output signal of linear array CCD using FPGA is introduced. The CCD signal acquisition circuit with high speed and high sensitivity is designed based on the combination of FPGA with high-speed A/D conversion chipset to gather the signals of high-speed. The experimental results demonstrated that defects within 50 mu m similar to 1000 mu m were inspected effectively by the CCD scanning defects inspection instrument, that this method has a repetition error no more than 2.24 pixels, with high precision and good anti-noise ability.

关键词： data processing charge coupled device field programmable gate array charge coupled device

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Tracking articulator movements using orientation measurements

Tracking articulator movements using orientation measurement...

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2012 3rd IEEE/IET international conference on Audio, Language and Image processing, ICALIP 2012

作者： Ji, An Johnson, Michael T. Berry, Jeffrey Marquette University Department of Electrical and Computer Engineering Speech and Signal Processing Laboratory P. O. Box 1881 Milwaukee WI 53201-1881 United States

ISBN: (纸本)9781467301718

This paper introduces a new method to track articulator movements, specifically jaw position and angle, using 5 degree of freedom (5 DOF) orientation data. The approach uses a quaternion rotation method to accomplish this jaw tracking during speech using a single senor on the mandibular incisor. data were collected using the NDI Wave Speech Research System for one pilot subject with various speech tasks. The degree of jaw rotation from the proposed approach is compared with traditional geometric calculation. Results show that the quaternion based method is able to describe jaw angle trajectory and gives more accurate and smooth estimation of jaw kinematics. © 2012 IEEE.

关键词： Degrees of freedom (mechanics)

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Performance of Implemented 4x4 MIMO Receiver for 3G LTE Advanced System

Performance of Implemented 4x4 MIMO Receiver for 3G LTE Adva...

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6th international conference on signal processing and Communication Systems (ICSPCS)

作者： Cho, Dae-Soon Kim, IL-Kyu Park, Hyuncheol Elect & Telecommun Res Inst Daejeon South Korea Korea Adv Inst Sci & Technol Daejeon South Korea

ISBN: (纸本)9781467323932;9781467323925

3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) Advanced standards are currently under way, where 4x4 MIMO (Multiple Input Multiple Output) scheme is the minimum structure. One of the best solutions to support the maximum data rate transmission is to adopt a MIMO scheme, especially spatial multiplexing mode, which means that each antenna port can transmit separate data. To realize this algorithm, the main issue is to cancel interferences added to each antenna port, and therefore, the algorithm at the receiver should have good performances. In the aspect of implementation, MMSE (Minimum Mean Square Error) detection algorithm is a reasonable method considering both complexity and performance. Furthermore, an iterative receiver (IR) algorithm can also be applied to this system. An IR algorithm has a tradeoff between complexity and performance. In this paper, we designed a reasonable and implementable MIMO receiver structure and showed performance for 3GPP LTE Advanced system, and verified that hard decoded bits, PIC-MMSE (Parallel Interference Cancellation - MMSE) and 1-iteration PIC are enough to meet the required SNR using the implemented test-bed system.

关键词： 3G LTE Advanced MIMO Receiver MMSE-Detector MMSE-PIC

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Either Fit to data Entries or Locally to Prior: The Minimizers of Objectives with Nonsmooth Nonconvex data Fidelity and Regularization

Either Fit to Data Entries or Locally to Prior: The Minimize...

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3rd international conference on Scale Space and Variational Methods in Computer Vision

作者： Nikolova, Mila CMLA CNRS ENS Cachan UniverSud F-94235 Cachan France

ISBN: (纸本)9783642247842

We investigate coercive objective functions composed of a data-fidelity term and a regularization term. Both of these terms are non differentiable and non convex, at least one of them being strictly non convex. The regularization term is defined on a class of linear operators including finite differences. Their minimizers exhibit amazing properties. Each minimizer is the exact solution of an (overdetermined) linear system composed partly of linear operators from the data term, partly of linear operators involved in the regularization term. This is a strong property that is useful when we know that some of the data entries are faithful and the linear operators in the regularization term provide a correct modeling of the sought-after image or signal. It can be used to tune numerical schemes as well. Beacon applications include super resolution, restoration using frame representations, inpainting, morphologic component analysis, and so on. Various examples illustrate the theory and show the interest of this new class of objectives.

关键词： Image processing Inverse problems Non-smooth analysis Non-convex analysis Regularization signal processing Variational methods

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Research on Software Optimization of Real-Time processing System Based on DSP

Research on Software Optimization of Real-Time Processing Sy...

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3rd international conference on Mechanical and Electronics Engineering (ICMEE 2011)

作者： Gong, Mingju Liu, Yuanlai Tianjin Univ Technol Dept Commun Tianjin Key Lab Intelligence Comp & Novel Softwar Tianjin 300184 Peoples R China Tianjin Univ Techol Dept Commun Tianjin 300184 Peoples R China

ISBN: (纸本)9783037852866

The Digital signal Processors of TI C6000 series, have a structure called VLIW and a Harvard structure, and a electron system based on DSPs can meet the real-time requirement depending on making full use of the structures by its software. Therefore the executing efficiency of software will directly affect the real-time character of the whole system. In this article, several methods of software optimization for C6000 DSPs are summarized, including the use of intrinsics, data accessing band-width and software pipelining etc. Using these methods to optimize the C code software can mostly solve the bad real-time problems in processing and then the system can meet the real-time requirement.

关键词： real-time efficiency software optimization data accessing band-width software pipelining

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Bpm data processing based on epics soft ioc at hls

Bpm data processing based on epics soft ioc at hls

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3rd international Particle Accelerator conference 2012, IPAC 2012

作者： Ma, T.J. Yang, Y.L. Sun, B.G. Zou, J.Y. Lu, P. Zhou, Z.R. School of Nuclear Science and Technology University of Science and Technology of China NSRL Hefei 230029 China

ISBN: (纸本)9783954501151

A data analysis program has been developed and verified successfully for the new beam position monitor (BPM) system of the storage ring at Hefei Light Source (HLS). The new BPM system will be equipped with Libera Brilliance BPM processors in the upgrade project. The embedded system on Libera has completed some basic work, including data acquisition, position calculation, and EPICS IOC data output. A new record type has been developed to accomplish the beam position recalculation by log-ratio method. The new position signal's character was studied in the time and frequency domain. The software performed stably on-line and the preliminary results are presented. Copyright © 2012 by IEEE.

关键词： data acquisition

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Application of HDR imaging techniques for sonar images

Application of HDR imaging techniques for sonar images

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2012 3rd IEEE international conference on Computational Intelligence and Computing Research, ICCIC 2012

作者： Singh, Vijay Nallaperumal, Krishnan Centre for Information Technology and Engineering Manonmaniam Sundaranar University Tirunelveli India

ISBN: (纸本)9781467324816

High Dynamic Range-HDR high resolution recording and processing are required for sonar images when the electronic noise floor from the sensor arrays is well below the ambient acoustic noise floor in the ocean in the frequency bands of interest, while maximum signal levels are determined by the transmitted source level used for the system. Practically one has to handle instantaneous dynamic ranges in excess of 100 dB to support both extremes so that the highlight structure details of close-in bottom features, which are required to classify, are maintained, especially when a number of systems operate in closer proximity. Therefore the data acquisition problems in high frequency high dynamic imaging sonar become critical. Commercially available data acquisition components cannot handle the wide bandwidths and high dynamic range required. An overview of a number of recent techniques based on the use of custom silicon band-pass sigma-delta converters developed for these types of applications is discussed in this paper. © 2012 IEEE.

关键词： data acquisition

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