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Beyond rigidity: obtain localisability with noisy ranging measurement

Xiaoping Wang, Zheng Yang, Jun Luo, Changxiang Shen
2011 International Journal of Ad Hoc and Ubiquitous Computing  
In the same time, the average position error is about 3% of distance measurement range, when the ranging error is bounded by 10% to the real value of distance measurement.  ...  Consequently, rigidity-based approaches are infeasible in case of ranging errors.  ...  RQ shares the same design goal with us, which aims to acquire the structural stability with noisy ranging measurements.  ... 
doi:10.1504/ijahuc.2011.041627 fatcat:56frdbsi45dxfkv7hsu3jlbdbe

Spherical near field acoustic holography with microphones on a rigid sphere

Finn Jacobsen, Jo/rgen Hald, Efrén Fernandez, Guillermo Moreno
2008 Journal of the Acoustical Society of America  
The results of the audience and expert scores were then statistically analyzed and correlated with a set of room acoustic indices which had been measured in the same locations.  ...  There is a strong correlation between the subjective impression of reverberance with EDT and T30 and musical clarity with C80; 2.  ...  Spherical near field acoustic holography with microphones on a rigid sphere.  ... 
doi:10.1121/1.2934035 fatcat:57w2rziyfvcmnnyzsxlgg43qxa

Introduction [chapter]

2014 Beyond Urban Bias  
This suggests that rigid socialism (albeit with generous foreign aid) and uncompromised liberal demo cracy can fulfil the disparate needs of the poor.  ...  I have in mind in particular a wide range of measures, sometimes termed the 'second land reform', aimed at coping with the increasingly uneconomic nature of small farm production in an environment where  ...  First, I re-establish that UB cannot be measured with price indicators alone.  ... 
doi:10.4324/9781315037264-6 fatcat:ysmczqee4rcj3pgvon7kbp7v7y

Artificial Intellgence – Application in Life Sciences and Beyond. The Upper Rhine Artificial Intelligence Symposium UR-AI 2021 [article]

Karl-Herbert Schäfer
2021 arXiv   pre-print
In order to obtain reliable results, the process is repeated several times. The error measure is computed as the mean of all obtained measures during successive training.  ...  [10] explain the necessity to measure the quality of a dataset beyond the standard accuracy measure (proposing a set of four metrics to measure the coverage quality of a test dataset in the feature  ...  To handle this problem, the face length of a person in the front and back of a random frame is measured.  ... 
arXiv:2112.05657v1 fatcat:wdjgymicyrfybg5zth2dc2i3ni

Beyond Social Media Analytics: Understanding Human Behaviour and Deep Emotion using Self Structuring Incremental Machine Learning [article]

Tharindu Bandaragoda
2020 arXiv   pre-print
This platform is demonstrated using two large datasets with over 1 million tweets.  ...  The separated topic pathways were representative of the key topics of each entity and coherent against topic coherence measures.  ...  SentiStrength provides positive sentiment values ranging from 1 to 4 and negative sentiment values ranging from -1 to -4 respectively.  ... 
arXiv:2009.09078v1 fatcat:izo3eyjc4vdo3jnttt7omvsv5q

Three dimensional unique identifier based automated georeferencing and coregistration of point clouds in underground environment [article]

Sarvesh Kumar Singh, Bikram Pratap Banerjee, Simit Raval
2021 arXiv   pre-print
Filtering The filtering step is essential to remove erroneous or noisy points in the dataset which might have been captured due to false range and IMU measurements.  ...  Range difference (|R|) is measured between the range of the first point and the second point, where the range is measured from the point to the nearest trajectory.  ... 
arXiv:2102.10731v1 fatcat:6lup4iojnbgajfnjjgkmauy3yq

Matching geometrical descriptions in three-space

SB Pollard, J Porrill, JEW Mayhew, JP Frisby
1987 Image and Vision Computing  
The scheme combines features of a number of recent model matching algorithms with heuristics aimed to reduce the space of potential rigid transformations that relate scene descriptions.  ...  A .matching strategy for combining two or more three space descriptions, obtained here from edge based binocu-1ar stereo, of a scene is discussed.  ...  Rigidity implies that each of the pairwise relationships will be preserved between scene descriptions, hence any measured discrepancies must lie within a range predicted by the magnitude of allowable errors  ... 
doi:10.1016/0262-8856(87)90030-8 fatcat:d4vpvveeg5blvgrfcts3s7l4qi

Model Selection for Range Segmentation of Curved Objects [chapter]

Alireza Bab-Hadiashar, Niloofar Gheissari
2004 Lecture Notes in Computer Science  
The paper includes the segmentation results of a large collection of range images obtained from objects with planar and curved surfaces.  ...  Using this criterion, we then present a range data segmentation algorithm capable of segmenting complex objects with planar and curved surfaces.  ...  To show the performance of our algorithm in estimating angles and comparing it with the results obtained by Hoover et al.  ... 
doi:10.1007/978-3-540-24670-1_7 fatcat:z2rjywhxjnf3zhrvjglb6h2jui

An Innovative Multi-Sensor Fusion Algorithm to Enhance Positioning Accuracy of an Instrumented Bicycle

Shahjahan Miah, Efstathios Milonidis, Ioannis Kaparias, Nicholas Karcanias
2019 IEEE transactions on intelligent transportation systems (Print)  
A particular source of hazard appears to originate from the interaction of cyclists with motorised traffic at low speeds in urban areas.  ...  The algorithm relies on the measurement of a set of kinematic variables (such as yaw, roll and steering angles) through low-cost on-board sensors.  ...  measurement and η can be obtained from the bicycle geometry.  ... 
doi:10.1109/tits.2019.2902797 fatcat:y2zxmneh45dnpfx2gvaata5b4e

Cluster-Based Localisation Method for Dense WSN: A Distributed Balance between Accuracy and Complexity Fixed by Cluster Size

R. Marcelín-Jiménez, E. Rodriguez-Colina, M. Pascoe-Chalke, C. Moreno-Escobar, J. L. Marzo
2014 International Journal of Distributed Sensor Networks  
In order to build an accurate set of measurements, sensor nodes must have information regarding their own position within a system of coordinates.  ...  Localisation is a fundamental requirement for a monitoring and tracking system based on wireless sensor networks (WSN).  ...  Distance measurement techniques can be classified as range-based and range-free.  ... 
doi:10.1155/2014/295190 fatcat:xmoopunoenfprkvzmkp5fcwjiq

Direct-from-Video: Unsupervised NRSfM [chapter]

Karel Lebeda, Simon Hadfield, Richard Bowden
2016 Lecture Notes in Computer Science  
The technique can also be applied in traditionally challenging scenarios, such as modelling objects with strong self-occlusions or from an extreme range of viewpoints.  ...  In this work we describe a novel approach to online dense non-rigid structure from motion.  ...  For non-rigid objects, a "centre" is ill defined. Therefore, a face-tracking scenario is used and the accuracy of landmark tracking is measured.  ... 
doi:10.1007/978-3-319-49409-8_50 fatcat:oa265vzfxzhsvicupjja4cwhia

Analytic Reconstruction of a Two-Dimensional Velocity Field from an Observed Diffusive Scalar [article]

Arjun Sharma, Irina I. Rypina, Ruth Musgrave, George Haller
2019 arXiv   pre-print
We also discuss the use of the proposed velocity reconstruction in oceanographic applications to extend localised velocity measurements to larger spatial domains with the help of remotely sensed scalar  ...  These conclusions extend to the shallow-water equations and to flows with spatially dependent diffusivity.  ...  We acknowledge useful conversations with Markus Holzner and Larry Pratt, as well as partial funding from the Turbulent Superstructures priority program of the German National Science Foundation (DFG),  ... 
arXiv:1904.04919v2 fatcat:lps6d76e3jehli52tz6eowouzu

Three-Dimensional Unique-Identifier-Based Automated Georeferencing and Coregistration of Point Clouds in Underground Mines

Sarvesh Kumar Singh, Bikram Pratap Banerjee, Simit Raval
2021 Remote Sensing  
Field testing of the developed approach in an underground coal mine has been found effective with an accuracy of 1.76 m in georeferencing and 0.16 m in coregistration for a scan length of 850 m.  ...  Consequently, applications that require georeferenced point cloud or coregistered multitemporal point clouds such as detecting changes, monitoring deformations, tracking mine logistics, measuring roadway  ...  Filtering The filtering step is essential to remove erroneous or noisy points in the dataset which might have been captured due to false range and IMU measurements.  ... 
doi:10.3390/rs13163145 fatcat:ycr5zrjyineldhcolr5oddxkty

Robust Registration of Dynamic Facial Sequences

Evangelos Sariyanidi, Hatice Gunes, Andrea Cavallaro
2017 IEEE Transactions on Image Processing  
In this paper we propose an iterative rigid registration framework that estimates the misalignment with trained regressors.  ...  Limited improvement is obtained when K is increased up to 3 as, similarly, training stops early. When K " 4 (and beyond) there is a significant performance improvement.  ...  A popular approach to rigid facial registration is to localise and align fiducial landmark points (e.g., eyes) [5] .  ... 
doi:10.1109/tip.2016.2639448 pmid:28055877 fatcat:a24yrvy7rngn3a4kycmg6pfbzi

KinectFusion: Real-time dense surface mapping and tracking

Richard A. Newcombe, Andrew J. Davison, Shahram Izadi, Pushmeet Kohli, Otmar Hilliges, Jamie Shotton, David Molyneaux, Steve Hodges, David Kim, Andrew Fitzgibbon
2011 2011 10th IEEE International Symposium on Mixed and Augmented Reality  
in real-time, with a level of detail and robustness beyond any solution yet presented using passive computer vision.  ...  We demonstrate the advantages of tracking against the growing full surface model compared with frame-to-frame tracking, obtaining tracking and mapping results in constant time within room sized scenes  ...  PTAM, as a featurebased system, achieves excellent accuracy for camera tracking in previously unknown scenes, but the sparse point map it generates is still not useful for much beyond providing localisation  ... 
doi:10.1109/ismar.2011.6162880 fatcat:3p5toqtpjzerjb3qsxrrd75qbq
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