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A novel procedure for tracking the measuring point in thermoelastic curves using DIC

ENGINEERING FRACTURE MECHANICS 2017年 183卷 53-65页

作者： La Rosa, G. Clienti, C. Garrano, A. Marino Cugno Lo Savio, F. Univ Catania Dept Civil Engn & Architecture Viale Andrea Doria 6 I-95125 Catania Italy

The main purpose of this paper is defining a procedure that allows the tracking of the measuring point in notched specimens under static testing, investigated by full field experimental methodologies. One of the main problems is the motion of the measuring zone, associated with its compliance under increasing load. A procedure based on Digital Image Correlation (D.I.C.) aiming to define the stress concentration factor in a dynamic way has been developed. Furthermore, numerous revealing tests based on Thermographic Analysis (T.A.) have been carried out on flat plastics specimens with different hole diameters. The assessed and final tracking procedure could be used to better define the trend of temperature changes during the static tensile test, as well as measuring the stress concentration factors in notched specimens. (C) 2017 Elsevier Ltd. All rights reserved.

关键词： Digital image correlation Stress concentration factor Thermoelastic analysis tracking algorithm

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A comparison of two identification and tracking methods for polar lows

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TELLUS SERIES A-DYNAMIC METEOROLOGY AND OCEANOGRAPHY 2012年第1期64卷 1-11页

作者： Xia, Lan Zahn, Matthias Hodges, Kevin I. Feser, Frauke Von Storch, Hans Helmholtz Zentrum Geesthacht Inst Coastal Res D-21502 Geesthacht Germany Univ Reading NERC Ctr Earth Observat NCEO Reading Berks England

In this study, we compare two different cyclone-tracking algorithms to detect North Atlantic polar lows, which are very intense mesoscale cyclones. Both approaches include spatial filtering, detection, tracking and constraints specific to polar lows. The first method uses digital bandpass-filtered mean sea level pressure (MSLP) fieldsin the spatial range of 200-600 km and is especially designed for polar lows. The second method also uses a bandpass filter but is based on the discrete cosine transforms (DCT) and can be applied to MSLP and vorticity fields. The latter was originally designed for cyclones in general and has been adapted to polar lows for this study. Both algorithms are applied to the same regional climate model output fields from October 1993 to September 1995 produced from dynamical downscaling of the NCEP/NCAR reanalysis data. Comparisons between these two methods show that different filters lead to different numbers and locations of tracks. The DCT is more precise in scale separation than the digital filter and the results of this study suggest that it is more suited for the bandpass filtering of MSLP fields. The detection and tracking parts also influence the numbers of tracks although less critically. After a selection process that applies criteria to identify tracks of potential polar lows, differences between both methods are still visible though the major systems are identified in both.

关键词： cyclone tracking algorithm polar lows spatial filter North Atlantic

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ARM-based Behavior tracking and Identification System for Group-housed Pigs

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RECENT ADVANCES IN ELECTRICAL & ELECTRONIC ENGINEERING 2019年第6期12卷 554-565页

作者： Liu, Xingqiao Xuan, Jun Hussain, Fida Chong, Chen Li, Pengyu Jiangsu Univ Sch Elect & Informat Engn 301 Xuefu Rd Zhenjiang Jiangsu Peoples R China Nanjing Agr Univ Natl Engn & Technol Ctr Informat Agr Nanjing Jiangsu Peoples R China Yancheng Inst Technol Coll Elect Engn Yancheng Jiangsu Peoples R China

Background: A smart monitoring system is essential to improve the quality of pig farming. A real-time monitoring system provides growth, health and food information of pigs while the manual monitoring method is inefficient and produces stress on pigs, and the direct contact between human and pig body increases diseases. Methods: In this paper, an ARM-based embedded platform and image recognition algorithms are proposed to monitor the abnormality of pigs. The proposed approach provides complete information on in-house pigs throughout the day such as eating, drinking, and excretion behaviors. The system records in detail each pig's time to eat and drink, and the amount of food and water intake. Results: The experimental results show that the accuracy of the proposed method is about 85%, and the effect of the technique has a significant advantage over traditional behavior detection methods. Conclusion: Therefore, the ARM-based behavior recognition algorithm has certain reference significance for the fine group aquaculture industry. The proposed approach can be used for a central monitoring system.

关键词： Embedded system image recognition tracking algorithm pig behavior fine breeding behavior recognition

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Issues On Infrared Dim Small Target Detection And tracking

Issues On Infrared Dim Small Target Detection And Tracking

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International Conference on Smart Grid and Electrical Automation (ICSGEA)

作者： Eysa, Raziye Hamdulla, Askar Xinjiang Univ Informat Sci & Engn Shi Urumqi 830046 Peoples R China

ISBN: (纸本)9781728144634

Infrared dim small target detection has always been one of the difficulties in the field of infrared image processing. Due to the long imaging distance, targets usually occupy a few pixels in images, and lack of textural information. Besides, there is usually low contrast between the small targets and backgrounds in infrared images, the small targets are easily immersed in complex backgrounds, also raise the difficulty. Infrared dim small target detection and tracking technology is of great significance and high value in military and civilian applications and has broad application prospects. This paper focuses on the typical algorithm principles and characteristics of infrared dim small target detection and tracking technology. On this basis, the research status and development trend of infrared dim small target detection and tracking technology are predicted.

关键词： Dim and Small Infrared Target Target detection tracking algorithm

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Beacon Recognition and tracking Based on Omni-vision

Beacon Recognition and Tracking Based on Omni-vision

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International Conference on Optical Instruments and Technology - Optical Systems and Optoelectronic Instruments

作者： Zhang, Baofeng Liu, Yuli Cao, Zuoliang Tianjin Key Lab Control Theory & Applicat Complic Tianjin Peoples R China Tianjin Univ Technol Tianjin Peoples R China

ISBN: (纸本)9780819474001

Omnidirectional vision (Omni-vision) has the feature that an extremely wide view can be achieved simultaneously. The omni-image brings a highly unavoidable inherent distortion while it provides hemispherical field of views. In this paper, a method called Spherical Perspective Projection is used for correction of such distorted image. Omni-vision target recognition and tracking with fisheye lens for AGVs appears definite significant since its advantage of acquiring all vision information of the three-dimensional space once. A novel Beacon Model and Omni-vision tracker for mobile robots is described. At present, the research of target model has many different problems, such as outdoor illumination, target veiling, target losing. Specially, outdoor illumination and beacon veiling are the key problems which need an effective method to solve. The new beacon model which features particular topology shape can be recognized in the outdoors with part veiled of the object. In this paper an improved omni-vision object tracking method based on mean shift algorithm is proposed. The mean shift algorithm which is a powerful technique for tracking objects in image sequences with complex background has been proved to be successful for the fast computation and effective tracking problems. The recognition and tracking functions have been demonstrated on experimental platform.

关键词： omni-vision beacon recognition tracking algorithm

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EFFICIENT AND DISTRIBUTED tracking OF EVOLVING STATE 25

EFFICIENT AND DISTRIBUTED TRACKING OF EVOLVING STATE

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IEEE International Workshop on Machine Learning for Signal Processing

作者： Sayin, Muhammed O. Vanli, N. Denizcan Delibalta, Ibrahim Kozat, Suleyman S. Bilkent Univ Dept Elect & Elect Engn TR-06800 Ankara Turkey Avea Labs Istanbul Turkey

ISBN: (纸本)9781467374545

We propose a distributed tracking algorithm for evolving states. Here, we consider a distributed network of agents that observe an underlying state through a linear model. The agents can process observation data in a fully distributed manner irrespective of any centralized processing unit. We introduce a novel strategy based on aggregation of information in time at each agent and we employ a time-windowing approach in order to achieve computationally efficient algorithm with enhanced tracking performance. This strategy also performs efficiently in terms of the communication load over certain environments, e.g., where observation data has smaller dimension than state vector. Finally, we demonstrate the performance of the introduced algorithm over several scenarios.

关键词： tracking algorithm Markov chain random walk model dynamic state distributed learning

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tracking of Objects on Images: a General Approach

Tracking of Objects on Images: a General Approach

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Wave Electronics and its Application in Information and Telecommunication Systems (WECONF)

作者： Zilinberg, A. Y. Korneev, Y. A. St Petersburg State Univ Aerosp Instrumentat St Petersburg Russia

The article describes the approach to the construction of algorithms for tracking objects on the video image. Details are commented on the implementation of the procedure for associating traces of marks on adjacent fr... 详细信息

ISBN: (纸本)9781728122885

关键词： pattern recognition image analysis tracking algorithm

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A high-speed image acquisition and processing system in photoelectric tracking

A high-speed image acquisition and processing system in phot...

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International Symposium on Photoelectronic Detection and Imaging 2011 - Advances in Imaging Detectors and Applications

作者： Qin Lai-an Hou Zai-hong Wu Yi Tan Feng-fu He Feng CAS Key Lab Atmospher Composit & Opt Radiat Anhui Inst Opt & Fine Mech Hefei Peoples R China

ISBN: (纸本)9780819488350

With the wide application of photoelectric equipments in military and civilian areas such as aviation, arms control etc., high-speed image acquisition and real-time processing attracted more and more attention. In order to acquire the accurate position information of beacon in photoelectric tracking system quickly, a embedded high frame-rate CMOS beacon position system based on davinci technology was presented. This system could detect the beacon and acquire its position information with high-speed. Using CMOS sensor MT9M001 as detector, this system could capture image and calculated centroid at different speed. It used centroid algorithm based on double gate object tracking strategy to acquire the spot centroid and can process image of 600x550 resolution at 130fps. The system was characterized by dynamic reconfiguration and high efficiency of computation. It could be applied in photoelectric tracking and space laser communication.

关键词： Space optical communication photoelectric tracking tracking algorithm high speed image process Davinci technology CMOS image sensor

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Design and Implementation a real-time TV tracking System Based on TMS320DM642

Design and Implementation a real-time TV Tracking System Bas...

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IEEE International Conference on Robotics and Biomimetics (ROBIO)

作者： Li, Shiqiang Chen, Tianding Yu, Changhong Zhejiang Gongshang Univ Coll Informat & Elect Engn Hangzhou Zhejiang Peoples R China

ISBN: (纸本)9781424447749

This paper introduces a real-time TV tracking system which is based on DSP(DM642). It narrates the principle of hardware design and the structure of the hardware in detail. A fast median filter algorithm, which is the most novelty in the system, is used to achieve the image pre-processed. And the algorithm of centroid calculated and Gaussian-fitting predicting approach are used to track the target. The experiment proves that this system can obtain continuous and stable tracking effect when the target is moving and covered up.

关键词： DM642 TV tracking tracking algorithm Gaussian-fitting

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tracking and height-measuring algorithm applied to TERCOM radar altimeter

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Yuhang Xuebao/Journal of Astronautics 2005年第6期26卷 762-767页

作者： Ma, Hong Li, Na Zhang, Yun-Yu Department of Electronics and Information Engineering Huazhong University of Science and Technology Wuhan 430074 China

It is known that the pulse radar altimeter is an important assembly in the terrain contour matching system (TERCOM). The total performance of the TERCOM is almost determined by the echo-tracking and height-calculation algorithms embedded in the radar altimeter. The normal Offset Centre of Gravity (OCOG) algorithm and other classical methods based on tracking the half-power point of the rising-edge of the echo could not commendably meet the needs of the TERCOM system. A robust echo-tracking and height-calculation algorithm, the Modified Offset Centre of Gravity (M-OCOG) algorithm, is firstly presented in the paper. On the basis of the characteristic of the complicated echo, the superiority of M-OCOG algorithm at the aspects of echo-tracking ability and height-measuring performance is analyzed in detail. The TERCOM effect is also analyzed by two kinds of quantitative analysis approach here. The feasibility of applying M-OCOG algorithm to TERCOM radar altimeter is confirmed at the end of paper.

关键词： Height-measuring algorithm M-OCOG algorithm Pulse radar altimeter TERCOM tracking algorithm

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