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Hand-Tremor Frequency Estimation in Videos [chapter]
2019 Lecture Notes in Computer Science
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We consider two approaches for hand-tremor frequency estimation: (a) a Lagrangian approach where we detect the hand at every frame in the video, and estimate the tremor frequency along the trajectory; ... We focus on the problem of estimating human hand-tremor frequency from input RGB video data. ... This work is part of the research program Technology in Motion (TIM) (628.004.001), which is financed by the Netherlands Organisation for Scientific Research (NWO). ...
doi:10.1007/978-3-030-11024-6_14 fatcat:blcayld2prgs5ereulktg7h3aq
Hand-tremor frequency estimation in videos [article]
2018 arXiv pre-print
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We consider two approaches for hand-tremor frequency estimation: (a) a Lagrangian approach where we detect the hand at every frame in the video, and estimate the tremor frequency along the trajectory; ... We focus on the problem of estimating human hand-tremor frequency from input RGB video data. ... This work is part of the research program Technology in Motion (TIM) (628.004.001), which is financed by the Netherlands Organisation for Scientific Research (NWO). ...
arXiv:1809.03218v1 fatcat:3ljsui6binafbfgyvbxf3geflm
Validation of a new tool for automatic assessment of tremor frequency from video recordings
2011 Journal of Neuroscience Methods
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and 5 healthy volunteers underwent the examination in four standardized positions with focus on the hand tremor. ... We present a validation study for TremAn-a tool for automatic detection of tremor and measurement of its frequency from video recordings. ... In addition, the scales usually evaluate the amplitude of tremor while its frequency is only roughly estimated or simply neglected. ...
doi:10.1016/j.jneumeth.2011.02.033 pmid:21396403 fatcat:f7xugp5tergjflrc66zgvh5xhu
Accuracy of smartphone video for contactless measurement of hand tremor frequency
2020 Movement Disorders Clinical Practice
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To compare computer vision measurement of hand tremor frequency from smartphone video with a gold standard measure accelerometer. ... A total of 37 smartphone videos of hands, at rest and in posture, were recorded from 15 participants with tremor diagnoses (9 Parkinson's disease, 5 essential tremor, 1 functional tremor). ... smartphone video of hands in tremor disorders and hypothesize that it can quantify dominant tremor frequency in good agreement with accelerometer results. ...
doi:10.1002/mdc3.13119 pmid:34853806 pmcid:PMC8607978 fatcat:3hsmos4msfai3jts2g45i5xtvi
Noncontact Tremor Characterization Using Low-Power Wideband Radar Technology
2012 IEEE Transactions on Biomedical Engineering
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The set of UWB system frequencies and amplitudes estimations were highly correlated with the video system estimations with an average error in the scale of 0.1 Hz and 1 mm for the frequency and amplitude ... Continuous monitoring and analysis of tremor is important for the diagnosis and establishment of treatments in many neurological disorders. ... ACKNOWLEDGMENT The authors would like to thank the anonymous reviewers for their very helpful comments and questions and for their feedback on the contribution of this work that was integrated in the paper ...
doi:10.1109/tbme.2011.2177977 pmid:22155937 fatcat:7qoxsonhpbdvxcqtg7hsxz56tu
The Clinical Evaluation of Parkinson's Tremor
2015 Journal of Parkinson's Disease
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Parkinson's disease harbours many different tremors that differ in distribution, frequency, and context in which they occur. ... This may help to adequately characterize the tremor(s) occurring in a patient with Parkinson's disease. ... Therefore, it is useful to look for resting tremor in different arm positions (e.g. during walking, sitting with hands in the lap, or hanging on the sides; see online video supplement). ...
doi:10.3233/jpd-150650 pmid:26406126 pmcid:PMC4923747 fatcat:gb454nzg5rauvhmyma23hpitsq
Seeing the unseen: Could Eulerian video magnification aid clinician detection of subclinical Parkinson's tremor?
2020 Journal of clinical neuroscience
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Parkinsonian-appearance tremors were seen after magnification in a number of control hands, but the proportion was greater in the Parkinson's hands. ... We tested whether Eulerian magnification of apparently atremulous hands reveals a Parkinsonian tremor more frequently in Parkinson's than in controls. ... Acknowledgement We would like to thank Dr Jeremy Cosgrove and Dr Steven Butterworth for providing clinical rating of videos. ...
doi:10.1016/j.jocn.2020.09.046 pmid:33222895 fatcat:mjkgteq67feynf4fakznjjjzfu
Psychogenic tremor: a video guide to its distinguishing features
2014 Tremor and Other Hyperkinetic Movements
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While there are numerous studies evaluating psychogenic tremor in the literature, there are no publications that provide a video/visual guide that demonstrate the clinical characteristics of psychogenic ... Psychogenic tremor should be considered in the differential diagnosis of patients presenting with tremor, particularly if it is of abrupt onset, intermittent, variable and not congruous with organic tremor ... When she opens and closes her hands, the truncal tremor entrains to the frequency of the hand movements, increasing and decreasing in frequency. Video 6. Coherence. ...
doi:10.7916/d8fj2f0q pmid:25243097 pmcid:PMC4161970 fatcat:dhecoanxmren3jmii7ebmpxapq
TremAn: A tool for measuring tremor frequency from video sequences
2009 Movement Disorders
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genic tremor, the frequency of postural tremor of the left Published online 11 December 2009 in Wiley InterScience hand varies with time and decreases by more than 1 Hz in 25 (www.interscience.wiley.com ... segment shows a frequency measurement (3.22 6 0.2 Hz) of *The tool is available for free download at http://cmp.felk.cvut.cz/ the right hand rest tremor in a patient with Parkinson’s dis- uhrikz1 ...
doi:10.1002/mds.22904 pmid:20014071 fatcat:3klx5qxkcbff7klnj2slkin4ru
Prediction of clinical tremor severity using Rank Consistent Ordinal Regression [article]
2021 arXiv pre-print
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In addition to optical flows, transfer learning is also applied to leverage pre-trained network weights from a related task of tremor frequency estimate. ... In this work, we proposed to train a deep neural network (DNN) with rank-consistent ordinal regression using 276 clinical videos from 36 essential tremor patients. ... There were in total 276 videos from 36 patients, with 1-4 video recordings for each patient, and each video recording has two separate tremor video segments for the left and right hand. ...
arXiv:2105.01133v1 fatcat:5iukprn6jbcafdqj2fk5mguofy
The Computerized Classification of Micro-Motions in the Hand using Waveforms from Mobile Phone [article]
2021 arXiv pre-print
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The Computerized Classification of Micro-Motions in the hand using waveforms from mobile phone videos is a novel method that uses Eulerian Video Magnification, Skeletonization, Heatmapping, and the kNN ... machine learning model to detect the micro-motions in the human hand, synthesize their waveforms, and classify these. ... This process proved to be useful as it provided greater magnified tremor in the hands of PD patients due to extra central tremor components in their hands. ...
arXiv:2110.06723v1 fatcat:jznhhyiwofaepmk7pktcvp7sc4
An online movement and tremor identification algorithm for evaluation during deep brain stimulation
2022 Current Directions in Biomedical Engineering
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The method first estimates the instantaneous tremor frequency and then decomposes the motion signal into voluntary and tremorous parts. ... RESULTS: Instantaneous tremor frequency and amplitude are successfully tracked online. The overall accuracy for tremorous phases only is 89.1% and 76.3% when also non-tremorous phases are considered. ... Tremorous movement (Figure 1 .a, recording #3), clearly distinguishable with its peaks in the frequency domain, is successfully estimated in the time domain including its frequency and amplitude. ...
doi:10.1515/cdbme-2022-1028 fatcat:mdxhsscml5byjgmnbcgefghgpy
Clinicians' Tendencies to Under-Rate Parkinsonian Tremors in the Less Affected Hand
2015 PLoS ONE
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Neurologists tended to under-rate the less affected hand in resting tremor when the contralateral hand had severe tremor in Session I. ... The objective of this study was to report clinicians' tendencies to under-rate Parkinsonian tremors in the less affected hand. ... (Republic of Korea) for offering the tri-axis-accelerometer system and the patients who agreed to take part in the study. Author Contributions ...
doi:10.1371/journal.pone.0131703 pmid:26110768 pmcid:PMC4482425 fatcat:pz7shkuiyne5jnbsm2i42npngq
Development of digital biomarkers for resting tremor and bradykinesia using a wrist-worn wearable device
2020 npj Digital Medicine
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monitoring of tremor and bradykinesia. ... treatment-related changes in motor states. ... The symptom severity estimation step includes detection and assessment of resting tremor (if no hand movement was detected) and assessment of bradykinesia (if hand movement was detected and gait was not ...
doi:10.1038/s41746-019-0217-7 pmid:31970290 pmcid:PMC6962225 fatcat:zn4lmswzhjezhfxwa7uozuvroi
Assessing tremor severity
1993 Journal of Neurology, Neurosurgery and Psychiatry
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The scores obtained with the scale were compared with the results of upper limb accelerometry, an activity of daily living self-questionnaire and estimates of the tremor induced impairment in writing and ... A clinical rating scale which measured the severity of tremor in 20 patients (12 with essential tremor and 8 with "dystonic" tremor) was assessed at specific anatomical sites for both inter and intrarater ... No comparisons have been made between the clinic and video assessments because several difficulties have become apparent in estimating tremor severity from videotapes. ...
doi:10.1136/jnnp.56.8.868 pmid:8350102 pmcid:PMC1015140 fatcat:ysnk47eqe5d7fihzxbkwhfs63q
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