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The Effect of Presmoothing Images on Optical Flow Computation

L. Zhang, T. Sakurai, and H. Miike, Detection of Motion Fields under Spatio Temporal Non-Uniform Illumination, Image and Vision Computing, Elsevier Science 17:309-320, 1999

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Pneumatic Flow Characterization Using ECT Tomography Images Analysis

Abstract

The control of dense phase pneumatic convening process is not a trivial task. The control of bulk solids flow phenomena requires detailed knowledge about the temporal and spatial changes of material concentration during flow. This paper describes application of electrical capacitance tomography for the characterization of the pneumatic conveying of solids. The level of concentration changes obtained with the aid of tomography imaging and calculated flow velocity allows monitoring flow behaviour during the granular material transport process. The cross-correlation technique applied for image processing as well as the calculated pixels-based flow velocity profile together with the proposed visualisation method of tomography images sequence provide information about flow conditions. The study of flow characterization, based on ECT data, was conducted for measurements gathered with different flow conditions, including flow blockage.

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Gradation of Video Quality in Dash Services Using the H.264/SVC Coding

Abstract

The share of video streaming services in the global network traffic is increasing every year. For this reason the problem of optimal use of the available bandwidth, while ensuring an acceptable level of quality of the transmitted video is becoming an important issue. A combination of two techniques, DASH streaming and H.264/AVC video coding can be an important step towards solving this problem. The article presents the discussion the choice of the proper gradation of SVC encoding parameters inside representation of video content in DASH systems. We propose the Temporal Preservation (T-P) method of selection of the SVC stream structure to optimize the grading changes of video quality. This method allows for the implementation of DASH adaptation to changes in available bandwidth on the transmission link, which minimizes the impact of this process on the quality of the received video. According to results of conducted tests, the T-P method offers a better final video quality in DASH systems than similar solutions based on a standard adaptation method. The comparison with the DASH system that uses H.264/AVC encoding also showed superiority of the T-P method, especially in situations of high network congestion

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Human action recognition using simple geometric features and a finite state machine

high defnition colour video stream in FPGA device, Journal of Real-Time Image Processing, pp. 1-17, 2012 [7] A.P.B Lopes, R.S. Oliveira, J.M. de Almeida, A de A.Araùjo, Spatio-temporal frames in a bag-ofvisual- features approach for human actions recognition, In In Proceedings of the 2009 XXII Brazilian Symposium on Computer Graphics and Image Processing, SIBGRAPI Š09, pp. 315-321, 2009 [8] P. Natarajan, R. Nevatia. Coupled hidden semi markov models for activity recognition, In Motion and Video Computing, 2007. WMVC ’07. IEEE Workshop

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Realization of Scenarios for Video Surveillance

, pp. 1575-1592, 2009 [13] V.-T. Vu, F. Bremond, M. Thonnat, Automatic video interpretation: a novel algorithm for temporal scenario recognition, In Proceedings of the 18th International Joint Conference on Artificial intelligence (IJCAI’03), Morgan Kaufmann Publishers Inc., San Francisco, CA, USA, pp. 1295-1300, 2003 [14] ADVISOR project, http://www-sop.inria.fr/orion/ADVISOR, accessed 1.VI.2012 [15] T. Kryjak, Analiza i testowanie algorytmów generacji tła na potrzeby systemu monitoringu przestrzeni publicznej

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Optimal Combiners in Pre-Amplified Optical Wireless Systems under Medium-to-Strong Atmospheric Turbulence

References [1] Abtahi, M., Lemieux, P., Mathlouthi, W., Rusch, L.A. (2006). Suppression of turbulence-induced scintillation in free-space optical communication systems using saturated optical amplifiers. 24(12), 4966–4973 [2] Andrews, L.C., Phillips, R.L. (2005). Laser beam propagation through random media . SPIE Press, Bellingham, Washington, 2 edition [3] Anguita, A., Neifeld, M.A., Hildner, B., Vasic, B. (2010). Rateless coding on experimental temporally correlated FSO channels. 28(7):990–1002 [4] Barakat, R. (Aug 1988). Level

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