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A hybrid system for affine-invariant trajectory retrieval

Faisal Bashir, Ashfaq Khokhar, Dan Schonfeld
2004 Proceedings of the 6th ACM SIGMM international workshop on Multimedia information retrieval - MIR '04  
Using these feature spaces, we then develop a hybrid content based indexing and retrieval system that employs a two-stage matching scheme.  ...  The first stage uses affine-invariant Fourier Descriptor (FD) for indexing and retrieval.  ...  In this paper we propose a FD and PCA based hybrid system for the affine-invariant indexing and retrieval of trajectory data.  ... 
doi:10.1145/1026711.1026750 dblp:conf/mir/BashirKS04 fatcat:go2wnljfi5dndc5gypleaqe634

Automatic fish classification for underwater species behavior understanding

Concetto Spampinato, Daniela Giordano, Roberto Di Salvo, Yun-Heh Jessica Chen-Burger, Robert Bob Fisher, Gayathri Nadarajan
2010 Proceedings of the first ACM international workshop on Analysis and retrieval of tracked events and motion in imagery streams - ARTEMIS '10  
Abbasi and Mokhtarian [1] developed a system for retrieval of marine animal images, introducing for the first time curvature scale space analysis combined with affine transformation, with an accuracy of  ...  The proposed classification system defines a new method to recognize a large variety of underwater species by using a combination of affine invariant texture and shape features, providing accurate results  ... 
doi:10.1145/1877868.1877881 dblp:conf/mm/SpampinatoGSCFN10 fatcat:gsdjgei5i5bjndjqjspwkjdjya

Annotated Free-Hand Sketches for Video Retrieval Using Object Semantics and Motion [chapter]

Rui Hu, Stuart James, John Collomosse
2012 Lecture Notes in Computer Science  
Our contribution is to fuse the semantic richness of text with the expressivity of sketch, to create a hybrid 'semantic sketch' based video retrieval system.  ...  We present a novel video retrieval system that accepts annotated freehand sketches as queries.  ...  [27] proposed curvature scale-space [28] as a depiction invariant descriptor. Affine invariant contour representations for SBR were also explored by [17] .  ... 
doi:10.1007/978-3-642-27355-1_44 fatcat:vzjecfksnjeqzlwolka2p4azli

Space-Time Interpolants [chapter]

Goran Frehse, Mirco Giacobbe, Thomas A. Henzinger
2018 Lecture Notes in Computer Science  
To the best of out knowledge, this is the first abstraction refinement scheme for the reachability analysis over unbounded and dense time of affine hybrid systems, which is both sound and automatic.  ...  Reachability analysis is difficult for hybrid automata with affine differential equations, because the reach set needs to be approximated.  ...  Acknowledgments We thank Luca Geretti for helping us setting up Ariadne.  ... 
doi:10.1007/978-3-319-96145-3_25 fatcat:3kqrmpawv5bvdbxm4fkd7vnzeu

Fast Non-Parametric Learning to Accelerate Mixed-Integer Programming for Online Hybrid Model Predictive Control [article]

Jia-Jie Zhu, Georg Martius
2020 arXiv   pre-print
The field of hybrid MPC has demonstrated that exact optimal control law can be computed, e.g., by mixed-integer programming (MIP) under piecewise-affine (PWA) system models.  ...  Despite the elegant theory, online solving hybrid MPC is still out of reach for many applications.  ...  ACKNOWLEDGEMENTS We would like to thank Majid Khadiv and Brahayam Ponton for their helpful discussions, Marin Vlastelica Pogancic for the help in producing Fig. 5 , Vincent Berenz and Lidia Pavel for  ... 
arXiv:1911.09214v2 fatcat:dsbiowc5gff2xo3nzup5yn4ygi

Video Retrieval System for Meniscal Surgery to Improve Health Care Services

Sana Amanat, Muhammad Idrees, Muhammad Usman Ghani Khan, Zahoor Rehman, Hangbae Chang, Irfan Mehmood, Sung Wook Baik
2018 Journal of Sensors  
This research work is focussed on developing a corpus and video retrieval system for meniscus surgery.  ...  To decumbent this ratio, an innovative training mechanism is proposed through video retrieval system in this research.  ...  In this system, we also have used a hybrid of state-of-the-art techniques for feature detection, recognition, and comparison.  ... 
doi:10.1155/2018/4390703 fatcat:tgzeloo3vjgjhatvobmy3myrne

Front Matter: Volume 10609

Zhiguo Cao, Yuehuang Wang, Chao Cai
2018 MIPPR 2017: Pattern Recognition and Computer Vision  
The publisher is not responsible for the validity of the information or for any outcomes resulting from reliance thereon.  ...  Introduction PATTERN RECOGNITION AND COMPUTER VISION 02 Static facial expression recognition with convolution neural networks [10609-1] 03 Feature hashing for fast image retrieval [10609-2] 04 Affine invariant  ...  They are responsible for making this conference a success.  ... 
doi:10.1117/12.2316392 fatcat:d3hydhjmpzdb7o6qqaqprujfry

Exact Safety Verification of Hybrid Systems Based on Bilinear SOS Representation [article]

Zhengfeng Yang and Min Wu and Wang Lin
2012 arXiv   pre-print
A hybrid symbolic-numeric method is presented to compute exact inequality invariants of hybrid systems efficiently.  ...  Some numerical invariants of a hybrid system can be obtained by solving a bilinear SOS programming via PENBMI solver or iterative method, then the modified Newton refinement and rational vector recovery  ...  We define Definition 2 (Invariant). [25] An invariant of a hybrid system at location ℓ is an assertion I such that for any reachable state ℓ, x of the hybrid system, x |= I.  ... 
arXiv:1201.4219v2 fatcat:qme6j4cs6reidilc4il6g7himm

Virtual and intelligent traffic signs in rescue simulation system: Imitation of human society in agent society

Mostafa Asghari, Behrooz Masoumi, Mohammad Reza Meybodi
2009 2009 IEEE International Symposium on Computational Intelligence in Robotics and Automation - (CIRA)  
method for the trajectory tracking.  ...  This project aims to apply image processing techniques in computer vision featuring an omnidirectional vision system to agricultural mobile robots (AMR) used for trajectory navigation problems, as well  ...  The high-speed vision platform ...expand A statistical image retrieval method using color invariant Cheng Jin Pages: 521-525 Content based image retrieval is an essential task in many image processing  ... 
doi:10.1109/cira.2009.5423206 dblp:conf/cira/AsghariMM09 fatcat:r5aq3mrpuvd7zdnf3ju7rflzrq

Qualitative control of periodic solutions in piecewise affine models of genetic networks

Etienne Farcot, Jean-Luc Gouzé
2010 IFAC Proceedings Volumes  
Piecewise affine (PWA) systems are often used to model gene regulatory networks.  ...  In this paper we elaborate on previous work about control problems for this class of models, using also some recent results guaranteeing the existence and uniqueness of limit cycles, based solely on a  ...  Related works on control aspects concern the affine or multi-affine hybrid systems (Habets et al. [2004] , Belta et al. [2006] ), or Poincaré-Bendixson theorem for hybrid systems (Matveev et al. [2000  ... 
doi:10.3182/20100901-3-it-2016.00145 fatcat:plrtcmnzzffwth4dfeuvn6yidm

Multiple Video Instance Detection and Retrieval using Spatio-Temporal Analysis using Semi Supervised SVM Algorithm

R. Kousalya, S. Dharani
2017 International Journal of Computer Applications  
To the present finish, the work to formulate this drawback because the spatio-temporal trajectory search downside, wherever a trajectory may be a sequence of bounding boxes that find the thing instance  ...  Object instance search aims to not solely retrieve the pictures or frames that contain the query, however additionally find all its occurrences.  ...  An Overview of Data Models and Query Languages for Content-Based Video Retrieval [2] Video content-based retrieval requires many changes in a multimedia database management system relative to a traditional  ... 
doi:10.5120/ijca2017913495 fatcat:ozzueddgjnbcfhhmp3stikmpjq

Analysis and Detection of Content based Video Retrieval

Shivanand S Gornale, Ashvini K Babaleshwar, K Babaleshwar
2019 International Journal of Image Graphics and Signal Processing  
The demand for extraction of high level semantics contents as well as handling of low level contents in video retrieval systems are still in need.  ...  This paper highlights comprehensive and extensive review of CBVR techniques for detection of region of interest in a given video.  ...  [65] use a motion trajectory and temporal ordering sub-trajectories for retrieval of videos from the database. PCA is used to represent the sub-trajectories and further for indexing and retrieval.  ... 
doi:10.5815/ijigsp.2019.03.06 fatcat:mzlxdk3omjh2vflv66n4agprwu

Controller complexity reduction for piecewise affine systems through safe region elimination

Frank J. Christophersen, Melanie N. Zeilinger, Colin N. Jones, Manfred Morari
2007 2007 46th IEEE Conference on Decision and Control  
We consider the class of piecewise affine optimal state feedback control laws applied to discrete-time piecewise affine systems, motivated by recent work on the computation of closed-form MPC controllers  ...  a bounded performance decay compared to the optimal solution.  ...  ACKNOWLEDGMENT We wish to thank Michal Kvasnica for his constructive and helpful comments.  ... 
doi:10.1109/cdc.2007.4434694 dblp:conf/cdc/ChristophersenZ07 fatcat:tonuvm4m7rdbrpw2fxcnpirhki

Connected invariant sets for high-speed motion planning in partially-known environments

Daniel Althoff, Sebastian Scherer
2015 2015 IEEE International Conference on Robotics and Automation (ICRA)  
Prior work has considered the problem of finding positive control invariant sets (PCIS).  ...  An example implementation for loiter circles and power line obstacles is presented. Simulation scenarios are used for validating the proposed concept.  ...  constraints, for piecewise affine systems and some classes of hybrid systems [4] .  ... 
doi:10.1109/icra.2015.7139651 dblp:conf/icra/AlthoffS15 fatcat:xweweldtmfg63pjhbmbi73ytki

Syntactic Matching of Trajectories for Ambient Intelligence Applications

N. Piotto, N. Conci, F.G.B. De Natale
2009 IEEE transactions on multimedia  
In this paper we propose a novel approach for syntactic description and maching of object trajectories in digital video, suitable for classification and recognition purposes.  ...  A suitable metric is then proposed, which allows determining the similarity among trajectories, based on the so-called inexact or approximate matching.  ...  [18] introduced a trajectory retrieval system using a symbolic representation called movement pattern string (MPS).  ... 
doi:10.1109/tmm.2009.2030746 fatcat:ak5sgciwinb27l5qjxqj55cm4u
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