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Optic Flow from Multi-scale Dynamic Anchor Point Attributes [chapter]

B. J. Janssen, L. M. J. Florack, R. Duits, B. M. ter Haar Romeny
2006 Lecture Notes in Computer Science  
Optic flow describes the apparent motion that is present in an image sequence. We show the feasibility of obtaining optic flow from dynamic properties of a sparse set of multi-scale anchor points.  ...  A dense optic flow vector field is obtained through projection into a Sobolev space defined by and consistent with the dynamic constraints in the anchor points.  ...  Summary and Recommendations We have proposed an inherent multi scale optic flow estimation method that finds a flow field using the dynamic properties of so called anchor points.  ... 
doi:10.1007/11867586_70 fatcat:3yxcr3qkondpdkphunlwwx7bn4

Visual Analysis of Vessel Behaviour Based on Trajectory Data: A Case Study of the Yangtze River Estuary

Ye Li, Hongxiang Ren
2022 ISPRS International Journal of Geo-Information  
the Clustering Structure (OPTICS) clustering algorithm to cluster vessel trajectories to show the differences and similarities between vessel traffic flows; and showing the distribution of vessels and  ...  based on the principle of spatiotemporal density to semantically label vessel trajectories; using the Fast Dynamic Time Warping (FastDTW) similarity measurement algorithm and the Ordering Points to Identify  ...  In f , starting from the second point, each point is the moving point of the anchor point, and the internal forward traversal is performed to the anchor point.  ... 
doi:10.3390/ijgi11040244 fatcat:vnotn6bcrvdtbhcspxqve43bsm

Phase Diagram and Order Reconstruction Modeling for Nematics in Asymmetric π-Cells

Antonino Amoddeo, Riccardo Barberi
2021 Symmetry  
Topologically different nematic textures are connected by such a mechanism that is spatially driven by the intensity of the applied electric fields and by the anchoring angles of the nematic molecules  ...  The order dynamics have been well captured, putting in evidence the possible existence of a metastable biaxial state, and a phase diagram of the nematic texture has been built, therefore confirming the  ...  In principle, it is possible to distinguish the anchoring breaking from the order reconstruction by spatially resolving the flow field at the scale of the biaxial coherence length and of the surface extrapolation  ... 
doi:10.3390/sym13112156 fatcat:3akk5jd4nzaubod4ealoqcg5ri

Time Dependent Lyotropic Chromonic Textures in Microfluidic Confinements

Anshul Sharma, Irvine Lian Hao Ong, Anupam Sengupta
2020 Crystals  
By varying the confinement geometry, anchoring conditions, and the initial DSCG concentration, we can systematically tune the temporal dynamics of the N- to M-phase transition and textural behavior of  ...  be central in understanding the flow behavior of LCLCs and the associated transport properties of this versatile material.  ...  Data points of the individual replicates are shown in the Appendix A, FigureA1.  ... 
doi:10.3390/cryst11010035 fatcat:t3a7pvnpcvfihkj64bhhr7yqde

Integrate MSRCR and Mask R-CNN to Recognize Underwater Creatures on Small Sample Datasets

Shaojian Song, Jingxu Zhu, Xiuhua Li, Qingbao Huang
2020 IEEE Access  
least) and the scattering of light (resulting from the impurities and the flow of water).  ...  First, for each point on the five feature maps P2-P6, several anchor boxes are generated according to different aspect ratios and scales. The aspect ratios are usually 1:1, 1:2, and 2:1.  ... 
doi:10.1109/access.2020.3025617 fatcat:gktslvg425cztbdc332ujgyql4

RADNet: A Deep Neural Network Model for Robust Perception in Moving Autonomous Systems [article]

Burhan A. Mudassar, Sho Ko, Maojingjing Li, Priyabrata Saha, Saibal Mukhopadhyay
2022 arXiv   pre-print
We do feature alignment using a novel formulation of the Spatio-temporal Sampling Network (STSN) but with multi-scale offset prediction and refinement using a pyramid structure.  ...  Feature Alignment in Video Data: FGFA [38] aligns features from multiple frames to a keyframe by using optical flow based warping.  ...  In addition, multi-task formulations [25] , [28] , recurrent classifiers [18] and early/hybrid fusion of optical flow and RGB [35] , [37] are used to improve the action detection performance.  ... 
arXiv:2205.00364v1 fatcat:wnhngc5cqzd2pe4a33vquyvama

Fluctuating Entanglements in Single-Chain Mean-Field Models

Jay Schieber, Tsutomu Indei, Rudi Steenbakkers
2013 Polymers  
Here we show that an idea from Ronca and Allegra, generalized to arbitrary flows, can be implemented in a slip-link model to create a model that does satisfy all four criteria.  ...  with the stress-optic rule, and self-consistency between Green-Kubo predictions and linear viscoelastic predictions for infinitesimally driven systems.  ...  Although this is a multi-chain model, it is applied to nonlinear flows and we consider it worthwhile to add a few comments here.  ... 
doi:10.3390/polym5020643 fatcat:mhiygcq4qjdlravw7tdlxcrfa4

Time dependent lyotropic chromonic textures in PDMS-based microfluidic confinements [article]

Anshul Sharma, Irvine Lian Hao Ong, Anupam Sengupta
2020 arXiv   pre-print
By varying the confinement geometry, anchoring conditions and the initial DSCG concentration, we can systematically tune the temporal dynamics of the N to M-phase transition and textural behaviour of the  ...  Since static molecular states register the initial conditions for LC flows, the time dependent boundary and bulk conditions reported here suggest that the local surface-mediated dynamics could be central  ...  Looking from a membrane point of view, hydrophobic species can permeate readily through PDMS, ranging from pharmaceutical compounds to organic dyes [66, 67] but it is highly size dependant.  ... 
arXiv:2011.08556v1 fatcat:dcjmeun4zjg2fo6zg36edpffei

Anchoring-dependent bifurcation in nematic microflows within cylindrical capillaries [article]

Paul Steffen, Eric Stellamanns, Anupam Sengupta
2021 arXiv   pre-print
planar anchoring conditions.  ...  and the flow driving mechanism (pressure-driven or volume-driven).  ...  Dynamic viscosity of flowing nematic 5CB. Taken from [45] , viscosimetric measurements in a high aspect ratio microchannel filled with 5CB for different anchoring and shear rates.  ... 
arXiv:2103.08289v1 fatcat:756dhtsafjd2lbuvmrlpwgiy5m

The use of biophysical approaches to understand ciliary beating

Pietro Cicuta
2020 Biochemical Society Transactions  
Indeed, a full understanding of this requires connecting together behaviour across various lengthscales, from the molecular to the organelle, then at the cellular level and up to the tissue scale.  ...  Whilst the molecular structure is now very well understood, the dynamics of cilia is not well established either at the single cilium level nor at the level of collective beating.  ...  Funding This work was the focus of ERC CoG grant HydroSync and current funding is from CF Trust. Figure 1 . 1 Overview of the multi-scale structures at play in motile cilia.  ... 
doi:10.1042/bst20190571 pmid:31922188 pmcid:PMC7054749 fatcat:dfkbq7grkbf5jegbdwlsrpkesy

Impact of fuel composition on the recirculation zone structure and its role in lean premixed flame anchoring

Seunghyuck Hong, Santosh J. Shanbhogue, Ahmed F. Ghoniem
2015 Proceedings of the Combustion Institute  
Results show an intricate coupling between the flame anchoring and the RZ structure and length.  ...  Results indicate that for the flame to remain anchored, the RZ structure should satisfy L R,isothermal L R,reacting · Sc U∞ ∼ 0.1.  ...  A 1-mm BG-39 optical colored glass filter is placed in front of the camera to reduce IR radiation from the flame.  ... 
doi:10.1016/j.proci.2014.05.150 fatcat:nuipod2pbra6bjut7l3jidpmsu

Additive manufacturing of laminar flow cells for single-molecule experiments

Arash Ahmadi, Katharina Till, Yngve Hafting, Mark Schüttpelz, Magnar Bjørås, Kyrre Glette, Jim Tørresen, Alexander D. Rowe, Bjørn Dalhus
2019 Scientific Reports  
A microfluidic laminar flow cell (LFC) forms an indispensable component in single-molecule experiments, enabling different substances to be delivered directly to the point under observation and thereby  ...  Using these flow cells along with optical tweezers, we show compatibility with single-molecule experiments including the isolation and manipulation of single DNA molecules either attached to the surface  ...  As shown in Supplementary Video 1, the restoring force from the anchored DNA prevents beads from moving freely in a steerable optical trap.  ... 
doi:10.1038/s41598-019-53151-z pmid:31727950 pmcid:PMC6856346 fatcat:ozkmsbz7uvenfgzurmwfn5u3ce

2020 Index IEEE Transactions on Image Processing Vol. 29

2020 IEEE Transactions on Image Processing  
Wang, M., +, TIP 2020 2931-2946 Fast Optical Flow Extraction From Compressed Video.  ...  Raikwar, S.C., +, TIP 2020 4832-4847 Optical-and-Radar Image Fusion for Dynamic Estimation of Spin Satellites. Registration of Multi-View Point Sets Under the Perspective of Expectation-Maximization.  ... 
doi:10.1109/tip.2020.3046056 fatcat:24m6k2elprf2nfmucbjzhvzk3m

Surface anchoring mediates bifurcation in nematic microflows within cylindrical capillaries

Paul Steffen, Eric Stellamanns, Anupam Sengupta
2021 Physics of Fluids  
planar anchoring conditions.  ...  and the flow driving mechanism (pressure-driven or volume-driven).  ...  role in tuning the dynamic functionalities of LC materials. ] [18] [19] [20] [21] [22] [23] Our ability to potentially harness these dynamical attributes relies on an unambiguous characterization of  ... 
doi:10.1063/5.0050379 fatcat:e7mut425tjertkmwwonxvqftxe

Surface anchoring mediates bifurcation in nematic microflows within cylindrical capillaries

Paul Steffen, Eric Stellamanns, Anupam Sengupta
2021 Physics of fluids 33(7)  
planar anchoring conditions.  ...  and the flow driving mechanism (pressure-driven or volume-driven).  ...  role in tuning the dynamic functionalities of LC materials. ] [18] [19] [20] [21] [22] [23] Our ability to potentially harness these dynamical attributes relies on an unambiguous characterization of  ... 
doi:10.3204/pubdb-2022-00279 fatcat:6sspbpxlcnapll5z7lzab5ey5e
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