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Mesh-based video objects tracking combining motion and luminance discontinuities criteria

Sébastien Valette, Isabelle Magnin, Rémy Prost
2004 Signal Processing  
A new content-based mesh design algorithm for video objects segmentation and tracking is proposed.  ...  The algorithm moves the mesh nodes along motion or luminance discontinuities in order to ÿt the objects boundaries.  ...  Conclusion In this paper we described a novel content-based mesh design scheme, allowing motion discontinuities, occlusions and uncovering areas, that permits the segmentation of VOs for MPEG 4 video processing  ... 
doi:10.1016/j.sigpro.2004.04.003 fatcat:dtdmrn35c5fxhnlteei74u6y7i

Point Selection for Triangular 2-D Mesh Design Using Adaptive Forward Tracking Algorithm

Nastaran Borjian, Rassoul Amirfattahi, Saeed Sadri
2011 Positioning  
Two-dimensional mesh-based motion tracking preserves neighboring relations (through connectivity of the mesh) and also allows warping transformations between pairs of frames; thus, it effectively eliminates  ...  We modify the occlusion-adaptive, content-based mesh design and forward tracking algorithm used by Yucel Altunbasak for selection of points for triangular 2-D mesh design.  ...  In motion tracking, the estimated motion vectors are used to predict position an object in next frame and tracking it in sequencing video images [2, 3] .  ... 
doi:10.4236/pos.2011.21003 fatcat:td3cgto2fjcelemvw6idjwlljy

Mesh-Based Video Coding For Low Bit-rate Communications

P. Kocharoen, K.M. Ahmed, R.M.A.P. Rajatheva, W.A.C. Fernando
2006 IEEE transactions on consumer electronics  
In this paper, a new method for low bit-rate content-adaptive mesh-based video coding is proposed.  ...  The proposed method is wellsuited for video coding at very low bit rates, as processing results demonstrate that it provides good subjective and objective image quality at a lower number of required bits  ...  The implementation of block matching motion estimation to the mesh-based video coding is described below: i.  ... 
doi:10.1109/tce.2006.1649687 fatcat:u5fu7diegfbevcuzc44u4kls7q

Object-Based Rendering and 3-D Reconstruction Using a Moveable Image-Based System

Zhen-Yu Zhu, Shuai Zhang, Shing-Chow Chan, Heung-Yeung Shum
2012 IEEE transactions on circuits and systems for video technology (Print)  
The system supports object-based rendering and 3-D reconstruction capability and consists of three main components. 1) An improved video stabilization method to reduce the shaky motion frequently encountered  ...  suppress possible outliers and generate smooth 3-D meshes of objects.  ...  Koo for his help in constructing the movable image-based rendering system.  ... 
doi:10.1109/tcsvt.2012.2198133 fatcat:zcx7gu4ip5exjfdd7o3bjwiu4i

Video Quality Metrics [chapter]

Shahriar Akramullah
2014 Digital Video Concepts, Methods, and Metrics  
One way to avoid motion blur is by panning the camera to track the moving objects, so the object remains sharp but the background is blurred instead.  ...  as multihop wireless mesh networks.  ... 
doi:10.1007/978-1-4302-6713-3_4 fatcat:h3ixkabeezd4lj6d6h5ntpm4gq

New kernels for fast mesh-based motion estimation

A. Nosratinia
2001 IEEE transactions on circuits and systems for video technology (Print)  
Section II introduces the terminology used for mesh-based motion estimation, and presents optimality criteria for warping kernels.  ...  In particular, camera zoom, movement of the objects toward or away from the camera, and rotational motion of objects are much better described in a mesh-based model than in the traditional block-based  ... 
doi:10.1109/76.894281 fatcat:mybs3qxwsjbqlkvvsuqgbdyhki

Perceptually Adaptive Graphics [article]

Carol O'Sullivan, Sarah Howlett, Rachel McDonnell, Yann Morvan, Keith O'Conor
2004 Eurographics State of the Art Reports  
to discuss the future and current state of the field.  ...  In May 2001, a EUROGRAPHICS/ SIGGRAPH Campfire brought together a group of researchers from various fields, including computer graphics and visualisation, psychology, neuroscience, eye-movements and medicine  ...  Both indicators are combined to derive a Perceptual Distortion Metric [Win99, Win00] and are tested on video sequences using data gathered from the Video Quality Experts Group [VQE00], as well as data  ... 
doi:10.2312/egst.20041029 fatcat:bswmxocukvbrno776cpuew7lky

Hybrid image-/model-based gaze-contingent rendering

Hunter Murphy, Andrew T. Duchowski
2007 Proceedings of the 4th symposium on Applied perception in graphics and visualization - APGV '07  
existing image-based and model-based techniques.  ...  A non-isotropic hybrid image/model based gaze-contingent rendering technique utilizing ray casting on a GPU is discussed.  ...  Video-based eye tracking, which utilizes pupil and corneal reflections, is another non-contact technique.  ... 
doi:10.1145/1272582.1272604 dblp:conf/apgv/MurphyD07 fatcat:gkksjixm4fbg7cibkzzgeeh6my

Hybrid image/model-based gaze-contingent rendering

Hunter A. Murphy, Andrew T. Duchowski, Richard A. Tyrrell
2009 ACM Transactions on Applied Perception  
existing image-based and model-based techniques.  ...  A non-isotropic hybrid image/model based gaze-contingent rendering technique utilizing ray casting on a GPU is discussed.  ...  Video-based eye tracking, which utilizes pupil and corneal reflections, is another non-contact technique.  ... 
doi:10.1145/1462048.1462053 fatcat:te3qnu3gefekzgfjtiv7imyjfq

Sparse Representation of Video Data by Adaptive Tetrahedralizations [chapter]

Laurent Demaret, Armin Iske, Wahid Khachabi
2012 Computational Imaging and Vision  
Natural videos are composed of a superposition of moving objects, usually resulting from anisotropic motions into different directions.  ...  The utilized nonlinear approximation scheme is based on anisotropic tetrahedralizations of the 3d video domain, whose tetrahedra are adapted locally in space (for contour-like singularities) and locally  ...  In [1] , Altunbasak and Tekalp proposed an occlusion-adaptive and content-based mesh design in combination with a forward tracking procedure.  ... 
doi:10.1007/978-1-4471-2353-8_6 fatcat:qonwybwd7vcxxdmdfmsnvmxrpq

Perceptual visual quality metrics: A survey

Weisi Lin, C.-C. Jay Kuo
2011 Journal of Visual Communication and Image Representation  
Visual quality evaluation has numerous uses in practice, and also plays a central role in shaping many visual processing algorithms and systems, as well as their implementation, optimization and testing  ...  These include signal decomposition, justnoticeable distortion, visual attention, and common feature and artifact detection.  ...  Manish Narwaria and Mr.  ... 
doi:10.1016/j.jvcir.2011.01.005 fatcat:5or457ucvzbmnjm4vnxuehdpqi

A Novice Guide towards Human Motion Analysis and Understanding [article]

Ahmed Nabil Mohamed
2015 arXiv   pre-print
Human motion analysis and understanding has been, and is still, the focus of attention of many disciplines which is considered an obvious indicator of the wide and massive importance of the subject.  ...  Third, we review different taxonomies used for classifying motions. Fourth, we review various processes involved in motion analysis. Fifth, we exhibit how different surveys are structured.  ...  , calculating residual flow to detect rigidity or periodicity of moving objects), combination of shape-based and motion based approaches, and combination of component based and geometric configuration  ... 
arXiv:1509.01074v1 fatcat:kpqf277iw5f2bmlmog2ya2awci

Temporal prediction of video sequences using an image warping technique based on color segmentation [chapter]

N. Herodotou, A. N. Venetsanopoulos
1997 Lecture Notes in Computer Science  
Segmentation involves both spatial and motion homogeneity criteria.  ...  The focus is set in the various types of content-based scalability and object tracking.  ...  The mesh nodes are tracked along the sequence, and pixel motion in the mesh patches is interpolated using affine warping according to the motion of surrounding nodes.  ... 
doi:10.1007/3-540-63507-6_237 fatcat:shjy6tzdbrhu5dqr7m63wb7y6e

Video metamorphosis using dense flow fields

Yizhou Yu, Qing Wu
2004 Computer Animation and Virtual Worlds  
There is frame-to-frame camera or object motion most of the time when either the source or the target is an image sequence.  ...  One-to-one dense mappings between pairs of corresponding frames are obtained by applying a compositing procedure and a hierarchical image matching technique based on dynamic programming.  ...  Related Work Image morphing can be classified as mesh based [Wolberg 1990 ], or field-based [Beier and Neely 1992] .  ... 
doi:10.1002/cav.42 fatcat:f4d7egb75bcwnozbcqplmij6je

Towards key-frame extraction methods for 3D video: a review

Lino Ferreira, Luis A. da Silva Cruz, Pedro Assuncao
2016 EURASIP Journal on Image and Video Processing  
The increasing rate of creation and use of 3D video content leads to a pressing need for methods capable of lowering the cost of 3D video searching, browsing and indexing operations, with improved content  ...  This new visual experience is created by depth information that is part of 3D video and absent in classic 2D video.  ...  Acknowledgements This work was supported by the R&D Unit UID/EEA/ 50008/2013, Project 3DVQM and PhD Grant SFRH/ BD/37510/2007, co-funded by FEDER-PT2020, FCT/ MEC, Portugal.  ... 
doi:10.1186/s13640-016-0131-8 fatcat:sjyirm6yxvah5psfgzdephuwoa
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