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Dtic Ada039008: the Utilization of Procedure Models in Digital image Synthesis

2016年

Dtic Ada039008: the Utilization of Procedure Models in Digital image Synthesis by Defense Technical Information Center; Defense Technical Information Center; published by

关键词： algorithms computerized simulation image processing optical images ada039008: computer applications digital digital systems dtic archive image mathematical models models newell, martin e polygons procedure resolution three dimensional utah univ salt lake city school of computing

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Scalable and Modular Online Data processing for Ultrafast Computed Tomography Using CUDA Pipelines 2

Scalable and Modular Online Data Processing for Ultrafast Co...

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2nd Workshop on In Situ Infrastructures for Enabling Extreme-scale Analysis and Visualization (ISAV)

作者： Frust, Tobias Juckeland, Guido Bieberle, Andre Helmholtz Zentrum Dresden Rossendorf Bautzner Landstr 400 D-01328 Dresden Germany

ISBN: (纸本)9781509038725

For investigations of rapidly moving structures in opaque technical devices ultrafast electron beam X-ray computed tomography (CT) scanners are available at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR). Currently, measurement data must be initially downloaded after each CT scan from the scanner to a data processing machine. Afterwards, cross-sectional images are reconstructed. This limits the application fields of the scanners. For online observations and even automated process control of scanned objects a new modular data processing tool is presented consisting of user-definable pipeline stages that work independently together in a so called data processing pipeline that can keep up with the CT scanner's frame rate of up to 8 kHz. The data processing stages are arbitrarily programmable and combinable and are connected by a fast custom memory pool to optimize data transfer processes. As a result, this processing structure is not limited to CT application only. In order to achieve highest processing performances for the electron beam X-ray CT scanners all relevant data processing steps are individually implemented in separate stages using graphic processing units (GPUs) and NVIDIA's CUDA programming language. Data processing performance tests on two different high-end GPUs (Tesla K20c, GeForce GTX 1080) offer a slice image reconstruction performance that is well-suited for online application.

关键词： Computed tomography image reconstruction Multithreading Parallel algorithms Pipeline processing Real-time systems

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Medic: An Artificially Intelligent System to Provide Healthcare Services to Society and Medical Assistance to Doctors

Medic: An Artificially Intelligent System to Provide Healthc...

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International Conference on Communication and Electronics systems (ICCES)

作者： Jayawant, Shubham Chair of Power Electronics Institute of Power Engineering Dresden Germany

ISBN: (纸本)9781509010660

Since the last decade, number of applications of Artificial Intelligence in daily livelihood has drastically increased. This is primarily because of the inclusion of high-tech gadgets in our day-to-day lives. These gadgets provide high computational capabilities and geographical reach. These two features could be exerted to provide medical services to the society. This paper is based on a project which emphasizes on creating a software infrastructure which would provide healthcare services like diagnosis of diseases, advising medical tests to patients, providing medical prescription to patients by making use of personalized medicine problem solving algorithms etc., and providing medical assistance to doctors. This project, Medic, makes use of natural language processing, fuzzy logic, deep learning and a constantly evolving knowledge base to correctly diagnose diseases. It also provides various services to doctors which would help them while making decisions regarding any patient's medical treatment.

关键词： Artificial Intelligence Natural language processing image recognition Convolution neural networks Deep learning Artificial neural networks

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The Cropland Capture Game: Good Annotators Versus Vote Aggregation Methods 4th

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4th International Conference on Computer Science, Applied Mathematics and Applications (ICCSAMA)

作者： Baklanov, Artem Fritz, Steffen Khachay, Michael Nurmukhametov, Oleg See, Linda Int Inst Appl Syst Anal Laxenburg Austria Krasovsky Inst Math & Mech Ekaterinburg Russia Ural Fed Univ Ekaterinburg Russia

ISBN: (纸本)9783319388847;9783319388830

The Cropland Capture game, which is a recently developed Geo-Wiki game, aims to map cultivated lands using around 17,000 satellite images from the Earth's surface. Using a perceptual hash and blur detection algorithm, we improve the quality of the Cropland Capture game's dataset. We then benchmark state-of-the-art algorithms for an aggregation of votes using results of well-known machine learning algorithms as a baseline. We demonstrate that volunteer-image assignment is highly irregular and only good annotators are presented (there are no spammers and malicious voters). We conjecture that the last fact is the main reason for surprisingly similar accuracy levels across all examined algorithms. Finally, we increase the estimated consistency with expert opinion from 77 to 91% and up to 96% if we restrict our attention to images with more than 9 votes.

关键词： Crowdsourcing image processing Votes aggregation

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Anatomy-Aware Measurement of Segmentation Accuracy

Anatomy-Aware Measurement of Segmentation Accuracy

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Conference on Medical Imaging - image processing

作者： Tizhoosh, H. R. Othman, A. A. Univ Waterloo KIMIA Lab 200 Univ Ave West Waterloo ON Canada Suez Canal Univ Dept Informat Syst Comp & Informat Ismailia Egypt

ISBN: (纸本)9781510600195

Quantifying the accuracy of segmentation and manual delineation of organs, tissue types and tumors in medical images is a necessary measurement that suffers from multiple problems. One major shortcoming of all accuracy measures is that they neglect the anatomical significance or relevance of different zones within a given segment. Hence, existing accuracy metrics measure the overlap of a given segment with a ground-truth without any anatomical discrimination inside the segment. For instance, if we understand the rectal wall or urethral sphincter as anatomical zones, then current accuracy measures ignore their significance when they are applied to assess the quality of the prostate gland segments. In this paper, we propose an anatomy-aware measurement scheme for segmentation accuracy of medical images. The idea is to create a "master gold" based on a consensus shape containing not just the outline of the segment but also the outlines of the internal zones if existent or relevant. To apply this new approach to accuracy measurement, we introduce the anatomy-aware extensions of both Dice coefficient and Jaccard index and investigate their effect using 500 synthetic prostate ultrasound images with 20 different segments for each image. We show that through anatomy-sensitive calculation of segmentation accuracy, namely by considering relevant anatomical zones, not only the measurement of individual users can change but also the ranking of users' segmentation skills may require reordering.

关键词： image segmentation Gold Prostate Magnesium image processing algorithms and systems Tumors Ultrasonography Buildings Accuracy assessment Shape analysis

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Application of Web-GIS and Cloud Computing to Automatic Satellite image Correction

Application of Web-GIS and Cloud Computing to Automatic Sate...

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Baltic Geodetic Congress (BGC Geomatics)

作者： Moszynski, Marek Czarnul, Pawel Kulawiak, Marcin Bishop, Michael Bielinski, Tomasz Dobreva, Iliyana Gdansk Univ Technol Dept Geoinformat Fac Elect Telecommun & Informat Gdansk Poland Gdansk Univ Technol Dept Comp Architecture Fac Elect Telecommun & Informat Gdansk Poland Texas A&M Univ Dept Geog College Stn TX USA Texas A&M Univ Ctr Geospatial Sci Applicat & Technol GEOSAT College Stn TX USA

ISBN: (纸本)9781509024216

Radiometric calibration of satellite imagery requires coupling of atmospheric and topographic parameters, which constitutes serious computational problems in particular in complex geographical terrain. Successful application of topographic normalization algorithms for calibration purposes requires integration of several types of high-resolution geographic datasets and their processing in a common context. This paper presents the application of an operational system for cloud-based radiometric and topographic calibration of satellite imagery. The system uses a Web-based Geographic Information System integrated within a High Performance Computing environment for remote processing of uploaded satellite data. The article also presents sample results produced by the system and discusses the benefits of using a cloud-based environment.

关键词： Web-GIS cloud computing Geographic information systems Geophysical image processing High performance computing

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An orthogonal 16-point approximate DCT for image and video compression

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MULTIDIMENSIONAL systems AND SIGNAL processing 2016年第1期27卷 87-104页

作者： da Silveira, Thiago L. T. Bayer, Fabio M. Cintra, Renato J. Kulasekera, Sunera Madanayake, Arjuna Kozakevicius, Alice J. Univ Fed Santa Maria Programa Posgrad Informat BR-97119900 Santa Maria RS Brazil Univ Fed Santa Maria Dept Estat BR-97119900 Santa Maria RS Brazil Univ Fed Santa Maria LACESM BR-97119900 Santa Maria RS Brazil Univ Fed Pernambuco Dept Estat Signal Proc Grp Recife PE Brazil Univ Akron Dept Elect & Comp Engn Akron OH 44325 USA Univ Fed Santa Maria Dept Matemat BR-97119900 Santa Maria RS Brazil

A low-complexity orthogonal multiplierless approximation for the 16-point discrete cosine transform (DCT) was introduced. The proposed method was designed to possess a very low computational cost. A fast algorithm based on matrix factorization was proposed requiring only 60 additions. The proposed architecture outperforms classical and state-of-the-art algorithms when assessed as a tool for image and video compression. Digital VLSI hardware implementations were also proposed being physically realized in field programmable gate array technology and implemented in 45 nm up to synthesis and place-route levels. Additionally, the proposed method was embedded into a high efficiency video coding (HEVC) reference software for actual proof-of-concept. Obtained results show negligible video degradation when compared to Chen DCT algorithm in HEVC.

关键词： 16-Point DCT approximation Low-complexity transforms image compression Video coding

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EFFECT OF AFT ROTOR ON THE INTER-ROTOR FLOW OF AN OPEN ROTOR PROPULSION SYSTEM

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ASME Turbo Expo: Turbine Technical Conference and Exposition

作者： Slaboch, Paul E. Stephens, David B. Van Zante, Dale E. St Martins Univ Lacey WA 98503 USA NASA Glenn Res Ctr Cleveland OH USA

ISBN: (纸本)9780791849682

The effects of the aft rotor on the inter-rotor flow field of an open rotor propulsion rig were examined. A Particle image Velocimetry (PIV) dataset that was acquired phase locked to the front rotor position has been phase averaged based on the relative phase angle between the forward and aft rotors. The aft rotor phase was determined by feature tracking in raw PIV images through an image processing algorithm. The effects of the aft rotor potential field on the inter-rotor flow were analyzed and shown to be in reasonably good agreement with Computational Fluid Dynamics (CFD) simulations. The aft rotor position was shown to have a significant upstream effect, with implications for front rotor interaction noise. It was found that the aft rotor had no substantial effect on the position of the forward rotor tip vortex but did have a small effect on the circulation strength of the vortex when the rotors were highly loaded.

关键词： Rotors Propulsion systems Flow (Dynamics) image processing Engineering simulation Propulsion Simulation Particulate matter Noise (Sound) Computational fluid dynamics algorithms Vortices Wake turbulence

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Innovative methodology for the integration of range-data and image-based systems

Innovative methodology for the integration of range-data and...

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IMEKO International Conference on Metrology for Archeology and Cultural Heritage, MetroArcheo 2016

作者： Angelini, Andrea Portarena, Damiano Consiglio Nazionale delle Ricerche Istituto per le Tecnologie Applicate ai Beni Culturali Roma Italy Università degli studi di Roma Tor Vergata Italy

ISBN: (纸本)9781510849754

Most of the survey techniques used in archaeology and architecture are currently focused on range-data (laser scanning) and image-based systems (digital photogrammetry/photoscanning). The paper aims to highlight a different methodological approach in the procedures of acquisition and processing of numerical data. The proposed methodology suggests an alternative integration between point clouds from laser scanner and image-based system, exploiting the properties of the ICP algorithms. Three different experimentations were performed at different level in order to achieve the suitable procedure. Some graphics show the comparison between the classic approach and the new procedure. The results are very interesting for what concerns the elaboration of the numerical models. The correct position of the points in space contributes the next step of the surface reconstruction (meshing process) and the final 2D representation. © 2016 IMEKO-International Measurement Federation Secretariat. All rights reserved.

关键词： Data handling

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High-Level Synthesis for Medical image processing on systems on Chip: A Case Study 26

High-Level Synthesis for Medical Image Processing on Systems...

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26th International Conference on Field-Programmable Logic and Applications (FPL)

作者： Robinson, Fraser D. Crockett, Louise H. Nailon, William H. Stewart, Robert W. Univ Strathclyde Dept Biomed Engn Glasgow Lanark Scotland Univ Strathclyde Dept Elect & Elect Engn Glasgow Lanark Scotland Edinburgh Canc Ctr Dept Oncol Phys Edinburgh Midlothian Scotland

ISBN: (纸本)9782839918442

Adaptive radiotherapy is a technique intended to increase the accuracy of radiotherapy. Currently, it is not clinically feasible due to the time required to process the images of patient anatomy. Hardware acceleration of image processing algorithms may allow them to be carried out in a clinically acceptable timeframe. This paper presents the experiences encountered using high-level synthesis tools to design an accelerated segmentation algorithm for computed tomography images targeted for implementation on a System on Chip. Hardware coprocessors and their interfaces for optimal threshold generation and 3D mean filter algorithms were synthesised from C++ functions. Hardware acceleration significantly outperformed the software only implementation. The high-level synthesis tools allowed the rapid exploration of different design options. However, hardware design knowledge was still necessary in order to interpret the results effectively.

关键词： System-on-chip

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