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GANerated Hands for Real-time 3D Hand Tracking from Monocular RGB
[article]
2017
arXiv
pre-print
We address the highly challenging problem of real-time 3D hand tracking based on a monocular RGB-only sequence. Our tracking method combines a convolutional neural network with a kinematic 3D hand model, such that it generalizes well to unseen data, is robust to occlusions and varying camera viewpoints, and leads to anatomically plausible as well as temporally smooth hand motions. For training our CNN we propose a novel approach for the synthetic generation of training data that is based on a
arXiv:1712.01057v1
fatcat:7jxgkuoogfbb5itjoq2wbpftpa
more »
... ometrically consistent image-to-image translation network. To be more specific, we use a neural network that translates synthetic images to "real" images, such that the so-generated images follow the same statistical distribution as real-world hand images. For training this translation network we combine an adversarial loss and a cycle-consistency loss with a geometric consistency loss in order to preserve geometric properties (such as hand pose) during translation. We demonstrate that our hand tracking system outperforms the current state-of-the-art on challenging RGB-only footage.
Emergence ofBlastoschizomyces capitatusYeast Infections, Central Europe
2012
Emerging Infectious Diseases
Mueller, Y. Achermann); and University of Bern, Bern (K. Muehlethaler, S. ...
doi:10.3201/eid1801.111192
pmid:22261201
pmcid:PMC3310123
fatcat:n3fi5pz3jnglnecwdlbnnwsonm
Real-time Joint Tracking of a Hand Manipulating an Object from RGB-D Input
[article]
2016
arXiv
pre-print
Real-time simultaneous tracking of hands manipulating and interacting with external objects has many potential applications in augmented reality, tangible computing, and wearable computing. However, due to difficult occlusions, fast motions, and uniform hand appearance, jointly tracking hand and object pose is more challenging than tracking either of the two separately. Many previous approaches resort to complex multi-camera setups to remedy the occlusion problem and often employ expensive
arXiv:1610.04889v1
fatcat:eobmqcu6abc6pjalqy4m3arsze
more »
... ntation and optimization steps which makes real-time tracking impossible. In this paper, we propose a real-time solution that uses a single commodity RGB-D camera. The core of our approach is a 3D articulated Gaussian mixture alignment strategy tailored to hand-object tracking that allows fast pose optimization. The alignment energy uses novel regularizers to address occlusions and hand-object contacts. For added robustness, we guide the optimization with discriminative part classification of the hand and segmentation of the object. We conducted extensive experiments on several existing datasets and introduce a new annotated hand-object dataset. Quantitative and qualitative results show the key advantages of our method: speed, accuracy, and robustness.
Convex Optimisation for Inverse Kinematics
2019
2019 International Conference on 3D Vision (3DV)
We consider the problem of inverse kinematics (IK), where one wants to find the parameters of a given kinematic skeleton that best explain a set of observed 3D joint locations. The kinematic skeleton has a tree structure, where each node is a joint that has an associated geometric transformation that is propagated to all its child nodes. The IK problem has various applications in vision and graphics, for example for tracking or reconstructing articulated objects, such as human hands or bodies.
doi:10.1109/3dv.2019.00043
dblp:conf/3dim/YenamandraBW0T19
fatcat:j4r6e26qjnhrjbg5ncnlkifonm
more »
... ost commonly, the IK problem is tackled using local optimisation methods. A major downside of these approaches is that, due to the non-convex nature of the problem, such methods are prone to converge to unwanted local optima and therefore require a good initialisation. In this paper we propose a convex optimisation approach for the IK problem based on semidefinite programming, which admits a polynomial-time algorithm that globally solves (a relaxation of) the IK problem. Experimentally, we demonstrate that the proposed method significantly outperforms local optimisation methods using different real-world skeletons.
RGB2Hands: Real-Time Tracking of 3D Hand Interactions from Monocular RGB Video
[article]
2021
arXiv
pre-print
The dense matching encoding (·) is defined analogously to the approach by Mueller et al. Intra-Hand Relative Depth. ...
The most recent method by [Mueller et al. 2019 ] runs in real time while providing coarse interpenetration avoidance. ...
arXiv:2106.11725v1
fatcat:esmiakdncjco3cb6uhdzaqosoq
Rare Occurrence of Small-Bowel Volvulus Following Laparoscopic Appendectomy
2014
CRSLS MIS Case Reports from SLS
Laparoscopy has proven to be safe for diagnostic and therapeutic purposes in patients with suspected acute appendicitis. Case Description: We report a case of a rare occurrence of small-bowel volvulus after laparoscopic appendectomy. Discussion: Moreover, laparoscopy has a number of advantages when compared with open surgery, including faster recovery and shorter length of stay. Nevertheless, laparoscopic appendectomy has a dedicated morbidity. A lifethreatening case of small-bowel volvulus
doi:10.4293/crsls.2014.00162
fatcat:peclx5c4pbaenpmi76kv2jkvta
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... nd a properly applied surgical staple line is reported.
Rechargeable-hybrid-seawater fuel cell
2014
NPG Asia Materials
A novel energy conversion and storage system using seawater as a cathode is proposed herein. This system is an intermediate between a battery and a fuel cell, and is accordingly referred to as a hybrid fuel cell. The circulating seawater in this opencathode system results in a continuous supply of sodium ions, which gives this system superior cycling stability that allows the application of various alternative anodes to sodium metal by compensating for irreversible charge losses. Indeed, hard
doi:10.1038/am.2014.106
fatcat:wbua276gkfbzjnvilctn6wjl3i
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... rbon and Sn-C nanocomposite electrodes were successfully applied as anode materials in this hybrid-seawater fuel cell, yielding highly stable cycling performance and reversible capacities exceeding 110 mAh g − 1 and 300 mAh g − 1 , respectively.
Deciphering spatio-temporal fluorescence changes using multi-threshold event detection (MTED)
[article]
2020
bioRxiv
pre-print
Recent achievements in indicator optimization and imaging techniques promote the exploration of Ca2+ activity patterns as a main second messenger in many organs. Astrocytes are important regulators of brain activity and well known for their Ca2+-dependent modulation of neurons. However, standardized methods to analyze and interpret Ca2+ activity recordings are missing and hindering global comparisons. Here, we present a biophysics-based concept to analyze Ca2+ signals, which includes multiple
doi:10.1101/2020.12.06.413492
fatcat:rn26xsxterfexm62np54eqkwyi
more »
... resholds and provides the experimenter with a comprehensive toolbox for a differentiated and in-depth characterization of Ca2+ signals. We analyzed various ex vivo and in vivo imaging datasets and verify the validity of our multi-threshold event detection (MTED) algorithm across Ca2+ indicators, imaging setups, and model systems from primary cell culture to awake, head-fixed mice. Applying our MTED concept enables standardized analysis and advances research using optical readouts of cellular activity to decrypt brain function. It allowed us to obtain new insights into the complex dependence of Ca2+ activity patterns on temperature and neuronal activity.
High-resolution phase analyses and early crystallization processes of cement
2010
Acta Crystallographica Section A Foundations of Crystallography
Schlegel a , Urs Mueller a , Ulrich Panne a , Franziska Emmerling a . a BAM Federal Institute of Materials Research and Testing, Berlin, Germany Materials Science, Technical University Darmstadt, Germany ...
doi:10.1107/s0108767310096017
fatcat:bjmzcphrp5hkdbmkflyg2i4cpy
Implementation of the 2021 molecular ESGO/ESTRO/ESP risk groups in endometrial cancer
[article]
2021
medRxiv
pre-print
Mueller, E. Epstein,
385
J.W. Carlson, Phenotype of POLE-mutated endometrial cancer, PLoS One. (2019).
386
doi:10.1371/journal.pone.0214318.
387
[16] E. Oliva, A. Cheung, S. ...
doi:10.1101/2021.03.25.21254244
fatcat:zghjzfsxwngijemkysylrne6ym
Neuropharmacology and Management of Chemotherapy-Induced Nausea and Vomiting in Patients with Breast Cancer
2014
Breast Care
/Jordan
Breast Care 2014;9:246-253 Jordan/Schaffrath/Jahn/Mueller-Tidow/Jordan
Jordan K, Gralla R, Jahn F, Molassiotis A: International antiemetic guidelines on chemotherapy induced nausea and ...
aprepitant (or fosaprepitant)
aprepitant (days 2-3)*
Moderate
palonosetron + DEX
(alternative 5-HT3 RA if palonosetron is not available)
Breast Care 2014;9:246-253 Jordan/Schaffrath/Jahn/Mueller-Tidow ...
doi:10.1159/000366300
pmid:25404883
pmcid:PMC4209272
fatcat:r35kp5vjwnb3pgbxokhk65sdyu
Cobalt orthosilicate as a new electrode material for secondary lithium-ion batteries
2014
Dalton Transactions
Co2SiO4 is investigated for the first time as lithium-ion active material and a lithium storage mechanism is proposed including the reversible formation of Li4SiO4.
doi:10.1039/c4dt01325e
pmid:25043460
fatcat:v3toartkfvb5bjwn3hbigyccvq
Laparoscopic Indocyanine Green Sentinel Lymph Node Mapping in Endometrial Cancer
2016
Annals of Surgical Oncology
Background. In endometrial cancer (EMCA), indocyanine green (ICG) sentinel lymph node (SLN) mapping has been reported, mainly in conjunction with robotic surgery. Objective. We aimed to evaluate detection rates, sensitivity, and false negative (FN) rate of laparoscopic ICG SLN mapping in EMCA, and to evaluate differences in surgical outcomes between patients subjected to SLN biopsy only versus lymphadenectomy. Methods. A retrospective analysis of EMCA patients undergoing ICG SLN mapping ±
doi:10.1245/s10434-016-5090-x
pmid:26790667
pmcid:PMC4889624
fatcat:tjsbime63zfgzp6oiclotjtha4
more »
... (PLND) and/or para-aortic lymphadenectomy (PALND) was performed. Detection rates were calculated for the entire cohort. Sensitivity and FN rates were calculated for patients undergoing lymphadenectomy after SLN mapping, and surgical outcome was compared among patients undergoing SLN mapping only versus lymphadenectomy. Results. Of 75 patients, 33 underwent SLN mapping and 42 underwent SLN mapping followed by PLND/PALND. Overall and bilateral detection rates were 96 % (72/75) and 88 % (66/75), respectively, and the median number of removed SLNs, pelvic non-SLNs (NSLN) and para-aortic NSLNs was 3, 27, and 19, respectively. With a FN rate of 8.3 %, only one patient had bilateral FN SLNs and a metastatic para-aortal NSLN. Estimated blood loss (EBL) and operative (OR) time were significantly lower in patients undergoing SLN mapping only. No differences in complication rates between patients undergoing SLN mapping only and patients undergoing lymphadenectomy were recorded. Conclusions. Laparoscopic ICG SLN mapping has excellent overall and bilateral detection rates and a low FN rate. Compared with lymphadenectomy, SLN biopsy is associated with significantly lower EBL and shorter OR time.
Real-Time Hand Tracking Under Occlusion from an Egocentric RGB-D Sensor
2017
2017 IEEE International Conference on Computer Vision Workshops (ICCVW)
We present an approach for real-time, robust and accurate hand pose estimation from moving egocentric RGB-D cameras in cluttered real environments. Existing methods typically fail for hand-object interactions in cluttered scenes imaged from egocentric viewpoints-common for virtual or augmented reality applications. Our approach uses two subsequently applied Convolutional Neural Networks (CNNs) to localize the hand and regress 3D joint locations. Hand localization is achieved by using a CNN to
doi:10.1109/iccvw.2017.82
dblp:conf/iccvw/MuellerMS0CT17
fatcat:dqdrwatsqfd5vixaxwzw3fr6lu
more »
... timate the 2D position of the hand center in the input, even in the presence of clutter and occlusions. The localized hand position, together with the corresponding input depth value, is used to generate a normalized cropped image that is fed into a second CNN to regress relative 3D hand joint locations in real time. For added accuracy, robustness and temporal stability, we refine the pose estimates using a kinematic pose tracking energy. To train the CNNs, we introduce a new photorealistic dataset that uses a merged reality approach to capture and synthesize large amounts of annotated data of natural hand interaction in cluttered scenes. Through quantitative and qualitative evaluation, we show that our method is robust to self-occlusion and occlusions by objects, particularly in moving egocentric perspectives.
Deep Brain Recordings Using an Implanted Pulse Generator in Parkinson's Disease
2015
Neuromodulation (Malden, Mass.)
Objectives-Recent studies suggest that oscillatory beta activity could be used as a state biomarker in patients with Parkinson's disease for subthalamic closed-loop stimulation with the intention of improving clinical benefit. Here we investigate the feasibility of subthalamic recordings via a novel chronically implanted pulse generator. Methods-Subthalamic local field potential recordings were obtained from eight patients before and during deep brain stimulation (DBS). All data were analyzed
doi:10.1111/ner.12348
pmid:26387795
pmcid:PMC4881811
fatcat:y5xdt4eacjdchkujakwxqo6q5e
more »
... the frequency domain using Fourier transform based methods and compared between ON and OFF stimulation conditions. Results-Distinct peaks of oscillatory beta band activity were found in 12 of 15 electrodes. DBS induced a significant frequency specific suppression of oscillatory beta activity (p = 0.002). Conclusion- The results of the study suggest that oscillatory beta band synchronization and it's modulation by DBS is recordable with a system suitable for chronic implantation and may serve as a biomarker for subthalamic closed-loop stimulation in patients with Parkinson's disease.
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