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Annual International Workshop on DAtabases, TExts, Specifications and Objects, DATESO 2015

作者： Maršík, Ladislav Pokorný, Jaroslav Ilčík, Martin Dept. of Software Engineering Faculty of Mathematics and Physics Charles University Malostranské nám. 25 Prague Czech Republic Institute of Computer Graphics and Algorithms Vienna University of Technology Favoritenstraße 9-11 Vienna Austria Vienna1040 Austria

Interactive music retrieval systems using microphone input have become popular, with applications ranging from whistle queries to robust audio search engines capable of retrieving music from a short sample recorded in noisy environment. The availability for mobile devices brought them to millions of users. Underlying methods have promising results in the case that user provides a short recorded sample and seeks additional information about the piece. Now, the focus needs to be switched to areas where we are still unable to satisfy the user needs. Such a scenario can be the choice of a favorite music performance from the set of covers, or recordings of the same musical piece, e.g. in classical music. Various algorithms have been proposed for both basic retrieval and more advanced use cases. In this paper we provide a survey of the state-of-the-art methods for interactive music retrieval systems, from the perspective of specific user requirements.

关键词： Search engines

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Automated multi-contrast brain pathological area extraction from 2D MR images

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Journal of Applied Research and Technology 2015年第1期13卷 58-69页

作者： Dvořák, P. Bartušek, K. Kropatsch, W.G. Smékal, Z. Institute of Scientific Instruments of the ASCR V.v.i Academy if Sciences of the Czech Republic Brno Czech Republic Dept. of Telecommunications Faculty of Electrical Engineering and Communication Brno University of Technology Brno Czech Republic Pattern Recognition and Image Processing Group Institute of Computer Graphics and Algorithms Faculty of Informatics Vienna University of Technology Vienna Austria

The aim of this work is to propose the fully automated pathological area extraction from multi-parametric 2D MR images of brain. The proposed method is based on multi-resolution symmetry analysis and automatic thresholding. The proposed algorithm first detects the presence of pathology and then starts its extraction. T2 images are used for the presence detection and the multi-contrast MRI is used for the extraction, concretely T2 and FLAIR images. The extraction is based on thresholding, where Otsu's algorithm is used for the automatic determination of the threshold. Since the method is based on symmetry, it works for both axial and coronal planes. In both these planes of healthy brain, the approximate left-right symmetry exists and it is used as the prior knowledge for searching the approximate pathology location. It is assumed that this area is not located symmetrically in both hemispheres, which is met in most cases. The detection algorithm was tested on 203 T2-weighted images and reached the true positive rate of 87.52% and true negative rate of 93.14%. The extraction algorithm was tested on 357 axial and 443 coronal real images from publicly available BRATS databases containing 3D volumes brain tumor patients. The results were evaluated by Dice Coefficient (axial: 0.85 ± 0.11, coronal 0.82 ± 0.18) and by Accuracy (axial: 0.96 ± 0.05, coronal 0.94 ± 0.09). © 2015 Universidad Nacional Autónoma de México.

关键词： Brain Pathology Brain Tumor MRI Multi-contrast MRI Symmetry Analysis

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Adaptive scan strategies for fetal MRI imaging using slice to volume techniques

Adaptive scan strategies for fetal MRI imaging using slice t...

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IEEE International Symposium on Biomedical Imaging

作者： Bernhard Kainz Christina Malamateniou Giulio Ferrazzi Maria Murgasova Jan Egger Kevin Keraudren Mary Rutherford Joseph V. Hajnal Daniel Rueckert Department of Computing Biomedical Image Analysis Group UK Department Biomedical Engineering Division of Imaging Sciences King's College London UK Institute for Computer Graphics and Vision Graz University of Technology Austria

ISBN: (纸本)9781467393300

In this paper several novel methods to account for fetal movements during fetal Magnetic Resonance Imaging (fetal MRI) are explored. We show how slice-to-volume reconstruction methods can be used to account for motion adaptively during the scan. Three candidate methods are tested for their feasibility and integrated into a computer simulation of fetal MRI. The first alters the main orientation of the stacks used for reconstruction, the second stops if too much motion occurs during slice acquisition and the third steers the orientation of each slice individually. Reconstruction informed adaptive scanning can provide a peak signal-to-noise ratio (PSNR) improvement of up to 2 dB after only two stacks of scanned slices and is more efficient with respect to the uncertainty of the final reconstruction.

关键词： Image reconstruction Magnetic resonance imaging Uncertainty Image resolution Tracking Trajectory

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Thermal simulation of heterogeneous GaN/ InP/silicon 3DIC stacks

Thermal simulation of heterogeneous GaN/ InP/silicon 3DIC st...

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IEEE International Conference on 3D System Integration, 3DIC

作者： T. Robert Harris Eric J. Wyers Lee Wang Samuel Graham Georges Pavlidis Paul D. Franzon W. Rhett Davis North Carolina State University Raleigh NC US Department of Engineering and Computer Science Tarleton State University Stephenville TX USA Calibre Design Solutions Mentor Graphics Corporation Fremont CA USA Department of Mechanical Engineering Georgia Institute of Technology Atlanta GA USA Department of Electrical and Computer Engineering North Carolina State University Raleigh NC USA

Integration of materials such as GaN, InP, SiGe, and Si is a natural extension of the 3D-IC perspective and provides a unique solution for high performance circuits. In this approach, application of a component is no longer dependent on semiconductor material selection. In this paper, preliminary results are presented which examine the thermal performance of the technology. A thermal analysis prototype solution in Mentor graphics ™ Calibre ® provides surface heat maps based on IC layout, material property, and geometric configuration files. Chiplets are connected by heterogeneous interconnect (HIC). Differences in thermal performance of GaN and InP chiplets are explored by varying the number of HICs. Two methods for building up the model of a test chip are compared. One method uses custom scripts to place discrete blocks in the model to represent HICs, while the other uses thermal material properties extracted from the layout. Measurements presented confirm simulated results.

关键词： Semiconductor device modeling Gallium nitride Indium phosphide III-V semiconductor materials CMOS integrated circuits Layout Thermal conductivity

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Portable lensless wide-field microscopy imaging platform based on digital inline holography and multi-frame pixel super-resolution

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Light(Science & Applications) 2015年第1期4卷 152-162页

作者： Antonio C Sobieranski Fatih Inci H Cumhur Tekin Mehmet Yuksekkaya Eros Comunello Daniel Cobra Aldo von Wangenheim Utkan Demirci Demirci Bio-Acoustic-MEMS in Medicine(BAMM)Laboratory Division of Biomedical EngineeringDivision of Renal MedicineDepartment of MedicineBrigham and Women’s HospitalHarvard Medical SchoolBostonMAUSA Demirci Bio-Acoustic-MEMS in Medicine(BAMM)Laboratory Division of Infectious DiseasesBrigham and Women’s HospitalHarvard Medical SchoolBostonMAUSA INCoD–National Brazilian Institute for Digital Convergence/LAPIX Image Processing and Computer Graphics LabFederal University of Santa CatarinaBrazil Demirci Bio-Acoustic-MEMS in Medicine(BAMM)Laboratory Stanford University School of MedicineCanary Center at Stanford for Cancer Early DetectionPalo AltoCAUSA Present Address:Department of Biomedical Engineering Faculty of Engineering Bas¸kent UniversityAnkaraTurkey VisionLab Master in Applied ComputingUniversity of Itajaı´ValleyBrazil CERTI Foundation FlorianopolisBrazil

In this paper,an irregular displacement-based lensless wide-field microscopy imaging platform is presented by combining digital in-line holography and computational pixel super-resolution using multi-frame *** samples are illuminated by a nearly coherent illumination system,where the hologram shadows are projected into a complementary metal-oxide semiconductor-based imaging *** increase the resolution,a multi-frame pixel resolution approach is employed to produce a single holographic image from multiple frame observations of the scene,with small planar *** are resolved by a hybrid approach:(i)alignment of the LR images by a fast feature-based registration method,and(ii)fine adjustment of the sub-pixel information using a continuous optimization approach designed to find the global optimum *** method for phase-retrieval is applied to decode the signal and reconstruct the morphological details of the analyzed *** presented approach was evaluated with various biological samples including sperm and platelets,whose dimensions are in the order of a few *** obtained results demonstrate a spatial resolution of 1.55 μm on a field-of-view of<30 mm^(2).

关键词： digital in-line holography image registration lensless imaging point-of-care platform pixel super-resolution

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Underwater mixed environments

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2015年 8844卷 56-76页

作者： von Lukas, Uwe Freiherr Quarles, John Kaklis, Panagiotis Dolereit, Tim Maritime Graphics Fraunhofer IGD Rostock18059 Germany Department of Computer Science University of Texas at San Antonio San AntonioTX78249 United States Department Naval Architecture Ocean and Marine Engineering University of Strathclyde GlasgowG1 1XQ United Kingdom Institute for Computer Science University of Rostock Rostock18059 Germany

ISBN: (纸本)9783319170428

In this chapter we give a systematic overview over Virtual Reality (VR) and Augmented Reality (AR) in underwater settings and suggest several future applications. Based on a novel classification scheme we illustrate the broad range of available and future implementation options. Whilst we find a variety of previous work on creating and using virtual underwater worlds, quite few examples of real underwater settings exist up to now. Thus, we concentrate on this new category, sketch attractive application areas that go beyond entertainment, and derive requirements for Underwater Mixed Environments (UWME). Combined with a short summary on relevant aspects of underwater optics, we formulate potential topics of future research to overcome current limitations of UWME. © Springer International Publishing Switzerland 2015.

关键词： Augmented reality

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Towards a harmonic complexity of musical pieces 14

Towards a harmonic complexity of musical pieces

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14th Annual Workshop on DAtabases, TExts, Specifications and Objects, DATESO 2014

ISBN: (纸本)9788001054826

Music information retrieval (MIR) is small, but fast growing discipline. It aims at extraction of relevant information from music in order to improve the work with multimedia information systems. A popular approach in MIR is to apply signal processing techniques to extract low-level features from a musical piece. However, in order to create helpful applications, high-level concepts, such as music harmony, need to be examined as well. In this paper, we present a new model for understanding music harmony in computer systems. The proposed model takes the challenge of filling the gap between music theory and mathematical structures. Inspired by the computational complexity, we then derive a new term, harmonic complexity, that can be evaluated for a musical piece, and we test it on a genre classification problem.

关键词： Harmonic analysis

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RFA-Cut: Semi-automatic Segmentation of Radiofrequency Ablation Zones with and without Needles via Optimal s-t-Cuts

RFA-Cut: Semi-automatic Segmentation of Radiofrequency Ablat...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Jan Egger Harald Busse Philipp Brandmaier Daniel Seider Matthias Gawlitza Steffen Strocka Philip Voglreiter Mark Dokter Michael Hofmann Bernhard Kainz Xiaojun Chen Alexander Hann Pedro Boechat Wei Yu Bernd Freisleben Tuomas Alhonnoro Mika Pollari Michael Moche Dieter Schmalstieg Institute for Computer Graphics and Vision Graz University of Technology Austria Dept. of Diagnostic and Interventional Radiology Leipzig University Hospital Germany Dept. of Computing Imperial College London UK School of Mechanical Engineering Shanghai Jiao Tong University Shanghai China Dept. of Internal Medicine and Gastroenterology Katharinenhospital Stuttgart Germany Distributed Systems Group Philipp University of Marburg Germany School of Science Aalto University Espoo Finland

ISBN: (纸本)9781424492695

In this contribution, we present a semi-automatic segmentation algorithm for radiofrequency ablation (RFA) zones via optimal s-t-cuts. Our interactive graph-based approach builds upon a polyhedron to construct the graph and was specifically designed for computed tomography (CT) acquisitions from patients that had RFA treatments of Hepatocellular Carcinomas (HCC). For evaluation, we used twelve post-interventional CT datasets from the clinical routine and as evaluation metric we utilized the Dice Similarity Coefficient (DSC), which is commonly accepted for judging computer aided medical segmentation tasks. Compared with pure manual slice-by-slice expert segmentations from interventional radiologists, we were able to achieve a DSC of about eighty percent, which is sufficient for our clinical needs. Moreover, our approach was able to handle images containing (DSC=75.9%) and not containing (78.1%) the RFA needles still in place. Additionally, we found no statistically significant difference (p<0.423) between the segmentation results of the subgroups for a Mann-Whitney test. Finally, to the best of our knowledge, this is the first time a segmentation approach for CT scans including the RFA needles is reported and we show why another state-of-the-art segmentation method fails for these cases. Intraoperative scans including an RFA probe are very critical in the clinical practice and need a very careful segmentation and inspection to avoid under-treatment, which may result in tumor recurrence (up to 40%). If the decision can be made during the intervention, an additional ablation can be performed without removing the entire needle. This decreases the patient stress and associated risks and costs of a separate intervention at a later date. Ultimately, the segmented ablation zone containing the RFA needle can be used for a precise ablation simulation as the real needle position is known.

关键词： RFA decreases patient stress

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Means of atmospheric air pollution reduction during drilling wells

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IOP Conference Series: Materials Science and engineering 2016年第1期144卷

作者： L Shkitsa T Yatsyshyn M Lyakh O Sydorenko Ivano-Frankivsk National Technical University of Oil and Gas Engineering and Computer Graphics Department 15 Karpatska Street Ivano-Frankivsk 76019 Ukraine Ivano-Frankivsk National Technical University of Oil and Gas Department of Ecology 15 Karpatska Street Ivano-Frankivsk 76019 Ukraine Ivano-Frankivsk National Technical University of Oil and Gas Oil and Gas Equipment Department 15 Karpatska Street Ivano-Frankivsk 76019 Ukraine Reseach and Desing Institute PJSC 'Ukrnafta' Environmental Department 2 Pivnitchnuy Bulvar Ivano-Frankivsk 76019 Ukraine

The process of drilling oil and gas wells is the source of air pollution through drilling mud evaporation containing hazardous chemical substances. The constructive solution for cleaning device of downhole tool that contains elements covering tube and clean the surface from the mud in the process of rising from the well is offered. Inside the device is filled with magnetic fluid containing the substance neutralizing hazardous substances. The use of the equipment proposed will make it possible to avoid penetration of harmful substances into the environment and to escape the harmful effects of aggressive substances for staff health and increase rig's fire safety.

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Body measurements forecast based on factor analysis and radical basis function net

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2013 3rd International Conference on Mechanical Science and engineering, ICMSE 2013

作者： Liu, Zheng Li, Ji Tuo Chen, Guang Lu, Guo Dong Institute of Engineering and Computer Graphics Zhejiang University Hangzhou China

ISBN: (纸本)9783037857120

For acquiring the body measurements precisely and conveniently, this paper presents a forecast method with character parameters. The character parameters are chosen based on factor analysis. The nonlinear model based on radical basis function net builds the correlation between the character parameters and the detailed measurements. Through measuring a few character parameters easily we can obtain the whole body detailed sizes. This technology can be used in and benefit the clothing manufacture and human modeling. © (2013) Trans Tech Publications, Switzerland.

关键词： Factor analysis

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