168 Hits in 4.3 sec

LOF: Structure-Aware Line Tracking based on Optical Flow [article]

Meixiang Quan, Zheng Chai, Xiao Liu
2021 arXiv   pre-print
based entirely on Optical Flow (LOF).  ...  Firstly, we propose a gradient-based strategy to sample pixels on lines that are suitable for line optical flow calculation.  ...  We propose a structure-aware Line tracking algorithm based entirely on Optical Flow (LOF), which is illustrated in Fig. 1 .  ... 
arXiv:2109.08466v1 fatcat:3slkpnb5wbezfludrewtjzbps4

A probabilistic risk analysis for multimodal entry control

Boštjan Kaluža, Erik Dovgan, Tea Tušar, Milind Tambe, Matjaž Gams
2011 Expert systems with applications  
The advanced risk analysis presented in this paper makes it possible to distinguish between acceptable and unacceptable entries, based on several entry sensors, such as fingerprint readers, and intelligent  ...  Two types of line shapes were studied: the closed curve and the spiral line. If somebody's treading track takes on one of these shapes, this person wanders around and is, therefore, suspicious.  ...  The last module, visual learning, uses histograms of optical flow to detect the behavior at the visual level (see Section 4.4).  ... 
doi:10.1016/j.eswa.2010.11.065 fatcat:4325p5p7ojamfaqbsbmmcujujm

Survey on Computer Vision for UAVs: Current Developments and Trends

Christoforos Kanellakis, George Nikolakopoulos
2017 Journal of Intelligent and Robotic Systems  
The aim of this article is to present a comprehensive literature review on vision based applications for UAVs focusing mainly on current developments and trends.  ...  More specifically vision based position-attitude control, pose estimation and mapping, obstacle detection as well as target tracking are the identified components towards autonomous agents.  ...  The developed insect influenced sensor was based on optic flow analysis.  ... 
doi:10.1007/s10846-017-0483-z fatcat:2abqia3mlnedrlonxhlsjanffy

Bi-allelic loss-of-function variants in PPFIBP1 cause a neurodevelopmental disorder with microcephaly, epilepsy and periventricular calcifications [article]

Erik Rosenhahn, Thomas J. O'Brien, Maha S. Zaki, Ina Sorge, Dagmar Wieczorek, Kevin Rostasy, Antonio Vitobello, Sophie Nambot, Fowzan S. Alkuraya, Mais O. Hashem, Amal Alhashem, Brahim Tabarki (+28 others)
2022 medRxiv   pre-print
In a fetus with intracranial calcifications, we identified a rare homozygous missense variant that by structural analysis was predicted to disturb the topology of the SAM-domain region that is essential  ...  (Gly726Val) variant was performed based on the crystal structure of murine PPFIBP1 (PDB: 3TAD 3 ), which exhibits 97% sequence identity to its human ortholog in the region of the SAM domains.  ...  features was performed on a per-track basis and are then averaged across tracks to produce a single feature vector for each well.  ... 
doi:10.1101/2022.04.04.22273309 fatcat:l34w6h5dybg6xndluvonsy3ghe

Developing in vivo biophysics by fishing for single molecules

Xi Wang, Thorsten Wohland, Vladimir Korzh
2010 Developmental Biology  
These studies have paved the way for the application of fluorescence-based SMTs, e.g. fluorescence correlation spectroscopy, fluorescent energy transfer, or single particle tracking, in developmental biology  ...  In embryos of amniotes, this could be achieved by the loss-of-function approach (LOF) using morpholino-based antisense oligonucleotides.  ...  measurement is based on autofluorescence (Korzh et al., 2008) .  ... 
doi:10.1016/j.ydbio.2010.08.004 pmid:20707999 fatcat:p6j3stdlrnbozn773gi4apkfte

Spatial Pyramid Context-Aware Moving Object Detection and Tracking for Full Motion Video and Wide Aerial Motion Imagery [article]

Mahdieh Poostchi
2017 arXiv   pre-print
structures.  ...  In this dissertation, I present a collaborative Spatial Pyramid Context-aware moving object detection and Tracking system.  ...  We also compared our results with fragment-based trackers including frag-track FRT [36] , optical flow clustering tracker FCT [37] , FoT [38] , DPCF [79] and GGTv2 [80] .  ... 
arXiv:1711.01656v1 fatcat:w5okzgmz5ng5thxwq2p7dvwl6a

A Survey on Concept Drift in Process Mining

Denise Maria Vecino Sato, Sheila Cristiana De Freitas, Jean Paul Barddal, Edson Emilio Scalabrin
2022 ACM Computing Surveys  
We conducted a systematic literature review on the intersection of these areas, and thus, we review concept drift in PM and bring forward a taxonomy of existing techniques for drift detection and online  ...  Existing works depict that (i) PM still primarily focuses on offline analysis, and (ii) the assessment of concept drift techniques in processes is cumbersome due to the lack of common evaluation protocol  ...  They apply OPTICS [3] to derive the clusters and use a time-based graph to show the different structural changes. On the other hand, the approach proposed in [1] is offline.  ... 
doi:10.1145/3472752 fatcat:zay6purz35bsfejb3zdpn3yb4m

Advancements of Outlier Detection: A Survey

Ji Zhang
2013 EAI Endorsed Transactions on Scalable Information Systems  
A similar outlier-ness metric to LOF, called OPTICS-OF, was proposed in [20] .  ...  Grid-based Clustering Methods Grid-based clustering methods perform clustering based on a grid-like data structure with the aim of enhancing the efficiency of clustering.  ... 
doi:10.4108/trans.sis.2013.01-03.e2 fatcat:lbdz5pocs5fzjnrimhdb5sdray

Murine MPDZ ‐linked hydrocephalus is caused by hyperpermeability of the choroid plexus

Junning Yang, Claire Simonneau, Robert Kilker, Laura Oakley, Matthew D Byrne, Zuzana Nichtova, Ioana Stefanescu, Fnu Pardeep‐Kumar, Sushil Tripathi, Eric Londin, Pascale Saugier‐Veber, Belinda Willard (+6 others)
2018 EMBO Molecular Medicine  
Though congenital hydrocephalus is heritable, it has been linked only to eight genes, one of which is MPDZ Humans and mice that carry a truncated version of MPDZ incur severe hydrocephalus resulting in  ...  Based on our findings and detailed observations of the ultrastructure of the CP, we propose a new pathophysiological mechanism to explain the formation of hydrocephalus in the Mpdz LOF mouse model.  ...  Discussion Our results indicate that Mpdz LOF has a twofold effect on the barrier function of murine CP: It increases both passive paracellular permeability, as indicated by the leakage of the GD-based  ... 
doi:10.15252/emmm.201809540 pmid:30518636 pmcid:PMC6328942 fatcat:xw7h62lr5rgjfmr6icb2k2eqwu

Murine MPDZ-Linked Hydrocephalus is Caused by Hyperpermeability of the Choroid Plexus [article]

Junning Yang, Claire Simonneau, Robert Kilker, Laura Oakley, Matthew Byrne, Zuzana Nichtova, Ioana Stefanescu, Fnu Pardeep-Kumar, Sushil Tripathi, Eric Londin, Pascale Saugier-Veber, Belinda Willard (+4 others)
2018 bioRxiv   pre-print
Though congenital hydrocephalus is heritable, it has been linked only to eight genes, one of which is MPDZ.  ...  DISCUSSION Our results indicate that Mpdz LOF has a two-fold effect on the barrier function of murine CP: it increases both passive paracellular permeability, as indicated by the leakage of the GD-based  ...  Based on initial sample variance, we increased sample size to test the statistical significance of inter-group difference, to fulfill the above criterion.  ... 
doi:10.1101/446500 fatcat:7qalc2po75dmzm36vqzjzr72se


Dan K. Fitzgerald, Lester L. Boyer, Walter T. Grondzik
1982 Passive and Low Energy Alternatives I  
Design variables and their impact on savings potential are discussed at length in the early stages of the process.  ...  A sensitivity analysis is performed on several of the detailed daylight design variables to show specifically how they affect annual energy saving.  ...  In the LOF method this is typically a 90 degree angle and this component is based on a unit value.  ... 
doi:10.1016/b978-0-08-029405-6.50024-6 fatcat:7cusxqgjnbatvof7dm23a7bc4e

CARS 2016—Computer Assisted Radiology and Surgery Proceedings of the 30th International Congress and Exhibition Heidelberg, Germany, June 21–25, 2016

2016 International Journal of Computer Assisted Radiology and Surgery  
The proposed method iteratively track abdominal arteries from thick to thin parts based on line structure enhancement results.  ...  Optical tracking, on the other hand, has significantly higher accuracy than EM tracking but has a line-of-sight issue, which precludes its use for interventional applications.  ...  The navigation is performed with an optical tracking system (OTS) after registering the conical holes of the holder in the image space with those corresponding ones obtained with a tracked pointer in the  ... 
doi:10.1007/s11548-016-1412-5 pmid:27206418 fatcat:uk5r46n2xvhedkfjzmeiweyneq

Follow the Trail: Machine Learning for Fraud Detection in Fintech Applications

Branka Stojanović, Josip Božić, Katharina Hofer-Schmitz, Kai Nahrgang, Andreas Weber, Atta Badii, Maheshkumar Sundaram, Elliot Jordan, Joel Runevic
2021 Sensors  
In addition, we provide an analysis on the influence of selected features on their performance.  ...  Financial technology, or Fintech, represents an emerging industry on the global market.  ...  In addition, a minor similarity exists between LOF and density-based clustering methods, such as OPTICS [84] or DBSCAN [85] .  ... 
doi:10.3390/s21051594 pmid:33668773 fatcat:e4d4zx7f7zg4jgddjm565zwsgu


1992 International Journal of Modern Physics A  
It evidently is easier on the machine optics.  ...  Tracking and Optics If dipole magnets are used behind the calorimeter walls, with pt kick of l-2 GeV, then the sagitta of a typical track of pt = 10 GeV (chosen to keep the geometry very simple) is about  ... 
doi:10.1142/s0217751x92001885 fatcat:gwafe3hem5hrxky52ohjf6bbrm

Big Data for Health

Javier Andreu-Perez, Carmen C. Y. Poon, Robert D. Merrifield, Stephen T. C. Wong, Guang-Zhong Yang
2015 IEEE journal of biomedical and health informatics  
bioinformatics, sensor informatics, and imaging informatics will benefit from an integrated approach of piecing together different aspects of personalized information from a diverse range of data sources, both structured  ...  For example, based on metal nanoparticle arrays and single nanoparticles, the sensitivity of localized surface plasmon resonance optical sensors can be pushed toward the detection limit of a single molecule  ...  Further studies on these high-risk patients based on morphological images of the aorta may provide insight into the rate of disease development.  ... 
doi:10.1109/jbhi.2015.2450362 pmid:26173222 fatcat:wdmtokdztffmjavdosqcjxiyxm
« Previous Showing results 1 — 15 out of 168 results