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Compressed digital holography: from micro towards macro 39

Compressed digital holography: from micro towards macro

引用

conference on applications of Digital image processing xxxIx

作者： Schretter, Colas Bettens, Stijn Blinder, David Pesquet-Popescu, Beatrice Cagnazzo, Marco Dufaux, Frederic Schelkens, Peter Vrije Univ Brussel Dept Elect & Informat ETRO Brussels Belgium Univ Paris Saclay Telecom ParisTech CNRS LTCI Paris France iMinds Technol Pk 19 Zwijnaarde Belgium

ISBN: (数字)9781510603349

ISBN: (纸本)9781510603332;9781510603349

The age of computational imaging is merging the physical hardware-driven approach of photonics with advanced signal processing methods from software-driven computer engineering and applied mathematics. The compressed sensing theory in particular established a practical framework for reconstructing the scene content using few linear combinations of complex measurements and a sparse prior for regularizing the solution. Compressed sensing found direct applications in digital holography for microscopy. Indeed, the wave propagation phenomenon in free space mixes in a natural way the spatial distribution of point sources from the 3-dimensional scene. As the 3-dimensional scene is mapped to a 2-dimensional hologram, the hologram samples form a compressed representation of the scene as well. This overview paper discusses contributions in the field of compressed digital holography at the micro scale. Then, an outreach on future extensions towards the real-size macro scale is discussed. Thanks to advances in sensor technologies, increasing computing power and the recent improvements in sparse digital signal processing, holographic modalities are on the verge of practical high-quality visualization at a macroscopic scale where much higher resolution holograms must be acquired and processed on the computer.

关键词： Digital holographic microscopy ( DHM) Compressed sensing (CS) Compressed digital holography (CDH) image reconstruction Inverse problems

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Data mining tools for Sentinel 1 and Sentinel 2 data exploitation 22

Data mining tools for Sentinel 1 and Sentinel 2 data exploit...

引用

conference on image and signal processing for Remote Sensing xxII

作者： Molina, Daniela Espinoza Datcu, Mihai German Aerosp Ctr Earth Observat Ctr Muenchener Str 20 Wessling Germany

ISBN: (数字)9781510604131

ISBN: (纸本)9781510604124;9781510604131

With the new planned Sentinel missions, the availability of Earth Observation data is increasing everyday offering a larger number of applications that can be created using these data. Currently, three of the five missions were launched and they are delivering a wealth of data and imagery of the Earth's surface as, for example, the Sentinel-1 carries an advanced radar instrument to provide an all-weather, day-and-night supply of Earth imagery. The second mission, the Sentinel-2, carries an optical instrument payload that will sample 13 spectral bands at different resolutions. Even though, we count on tools for automated loading and visual exploration of the Sentinel data, we still face the problem of extracting relevant structures from the images, finding similar patterns in a scene, exploiting the data, and creating final user applications based on these processed data. In this paper, we present our approach for processing radar and multi-spectral Sentinel data. Our approach is mainly composed of three steps: 1) the generation of a data model that explains the information contained in a Sentinel product. The model is formed by primitive descriptors and metadata entries, 2) the storage of this model in a database system, 3) the semantic definition of the image content based on machine learning algorithms and relevance feedback methods.

关键词： primitive feature extraction image analysis Sentinel data

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Analysis of the Effect of image Resolution on Automatic Face Gender and Age Classification 24

Analysis of the Effect of Image Resolution on Automatic Face...

引用

24th signal processing and Communication Application conference (SIU)

作者： Cerit, Betul Boluk, S. Arda Demirci, M. Fatih TOBB Ekon & Teknol Univ Bilgisayar Muhendisligi Bolumu Ankara Turkey

ISBN: (纸本)9781509016792

In this paper, the effect of the image resolution for gender detection and age classification have been analyzed by conducting experiments with facial images that have 10 different image resolutions ranging from 2 x 1 to 329 x 264. K Nearest Neighbor (k-NN), Support Vector Machine (SVM) and Random Forests (RF) classifiers, which have been successfully used in several applications, have been employed to extract gender and age information from the images. Experiments for age classification and gender detection have been performed separately.

关键词： Gender Classification Age Classification Support Vector Machines (SVM) k-Nearest Neighbor (k-NN) Random Forests (RF)

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A new approach to subjectively assess quality of plenoptic content 39

A new approach to subjectively assess quality of plenoptic c...

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conference on applications of Digital image processing xxxIx

作者： Viola, Irene Rerabek, Martin Ebrahimi, Touradj Ecole Polytech Fed Lausanne Multimedia Signal Proc Grp MMSPG Lausanne Switzerland

ISBN: (数字)9781510603349

ISBN: (纸本)9781510603332;9781510603349

Plenoptic content is becoming increasingly popular thanks to the availability of acquisition and display devices. Thanks to image-based rendering techniques, a plenoptic content can be rendered in real time in an interactive manner allowing virtual navigation through the captured scenes. This way of content consumption enables new experiences, and therefore introduces several challenges in terms of plenoptic data processing, transmission and consequently visual quality evaluation. In this paper, we propose a new methodology to subjectively assess the visual quality of plenoptic content. We also introduce a prototype software to perform subjective quality assessment according to the proposed methodology. The proposed methodology is further applied to assess the visual quality of a light field compression algorithm. Results show that this methodology can be successfully used to assess the visual quality of plenoptic content.

关键词： plenoptic function light field compression subjective evaluation image coding

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Graph-based segmentation of air borne LiDAR point clouds 22

Graph-based segmentation of air borne LiDAR point clouds

引用

conference on image and signal processing for Remote Sensing xxII

作者： Vilarino, David L. Martinez, Jorge Rivera, Francisco F. Cabaleiro, Jose C. Pena, Tomas F. Univ Santiago de Compostela CiTIUS Ctr Singular Invest Tecnoloxias Informac Santiago Spain

ISBN: (数字)9781510604131

ISBN: (纸本)9781510604124;9781510604131

In this paper, a graph-based technique originally intended for image processing has been tailored for the segmentation of airborne LiDAR points, that are irregularly distributed. Every LiDAR point is labeled as a node and interconnected as a graph extended to its neighborhood and defined in a 4D feature space (x, y, z, and the reflection intensity). The interconnections between pairs of neighboring nodes are weighted based on the distance in the feature space. The segmentation consists in an iterative process of classification of nodes into homogeneous groups based on their similarity. This approach is intended to be part of a complete system for classification of structures from LiDAR point clouds in applications needing fast response times. In this sense, a study of the performance/accuracy trade-off has been performed, extracting some conclusions about the benefits of the proposed solution. (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

关键词： Air borne LiDAR Point-cloud segmentation Graph processing

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Real-time FPGA-based Radar Imaging for Smart Mobility Systems

Real-time FPGA-based Radar Imaging for Smart Mobility System...

引用

conference on Real-Time image and Video processing

作者： Saponara, Sergio Neri, Bruno Univ Pisa Dept Informat Engn Via G Caruso 16 I-56122 Pisa 1 Italy

ISBN: (纸本)9781510601420

The paper presents an x-band FMCW (Frequency Modulated Continuous Wave) Radar Imaging system, called x-FRI, for surveillance in smart mobility applications. x-FRI allows for detecting the presence of targets (e.g. obstacles in a railway crossing or urban road crossing, or ships in a small harbor), as well as their speed and their position. With respect to alternative solutions based on LIDAR or camera systems, x-FRI operates in real-time also in bad lighting and weather conditions, night and day. The radio-frequency transceiver is realized through COTS (Commercial Off The Shelf) components on a single-board. An FPGA-based baseband platform allows for real-time Radar image processing.

关键词： Real-time RADAR signal processing x-band FMCW (Frequency Modulated Continuous Wave) FPGA (Field Programmable Gate Array) Surveillance 2D/3D Fast Fourier Transform (FFT)

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Fourier-Stokes polarimetry and the spatial-frequency filtering of phase anisotropy manifestations in the diagnostic tasks 39

Fourier-Stokes polarimetry and the spatial-frequency filteri...

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conference on applications of Digital image processing xxxIx

作者： Ushenko, A. G. Dubolazov, A. V. Ushenko, V. A. Ushenko, Yu. A. Pidkamin, L. Y. Kushnerik, L. Ya. Gavrylyak, M. S. Martseniak, I. Oliinyk, I. Grygorishin, P. Chernivtsi Natl Univ 2 Kotsyubinsky Str UA-58012 Chernovtsy Ukraine Bukovinian State Med Univ UA-58000 Chernovtsy Ukraine

ISBN: (数字)9781510603349

ISBN: (纸本)9781510603332;9781510603349

The optical model of polycrystalline networks of human skin is suggested. The results of investigation of the values of statistical (statistical moments of the 1st-4th order) parameters of polarization inhomogeneous images of skin surface in Fourier domain are presented. The diagnostic criteria of pathological process in human skin and its severity degree differentiation are determined.

关键词： polarization Fourier optics and signal processing imaging systems medical and biological imaging polarization speckle

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Mueller-matrix mapping of optically anisotropic fluorophores of molecular biological tissues in the diagnosis of death causes 39

Mueller-matrix mapping of optically anisotropic fluorophores...

引用

conference on applications of Digital image processing xxxIx

作者： Ushenko, A. G. Dubolazov, A. V. Ushenko, V. A. Ushenko, Yu. A. Pidkamin, L. Y. Softys, I. V. Zhytaryuk, V. G. Pavlyukovich, N. Chernivtsi Natl Univ 2 Kotsyubinsky Str UA-58012 Chernovtsy Ukraine Bukovinian State Med Univ UA-58000 Chernovtsy Ukraine

ISBN: (数字)9781510603349

ISBN: (纸本)9781510603332;9781510603349

A model of generalized optical anisotropy of polycrystalline networks of albumin and globulin of human brain liquor has been suggested. The polarization-phase method of spatial and frequency differentiation of linear and circular birefringence coordinate distributions have been analytically substantiated. A set of criteria of the dynamics of necrotic changes of polarization-phase images of liquor polycrystalline films for determination of death coming prescription has been detected and substantiated.

关键词： polarization Fourier optics and signal processing imaging systems medical and biological imaging

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High Dynamic Range Subjective Testing 39

High Dynamic Range Subjective Testing

引用

conference on applications of Digital image processing xxxIx

作者： Allan, Brahim Nilsson, Mike BT Future Consumer Applicat & Serv Res & Innovat Dept Ipswich Suffolk England

ISBN: (数字)9781510603349

ISBN: (纸本)9781510603332;9781510603349

This paper describes of a set of subjective tests that the authors have carried out to assess the end user perception of video encoded with High Dynamic Range technology when viewed in a typical home environment. Viewers scored individual single clips of content, presented in High Definition (HD) and Ultra High Definition (UHD), in Standard Dynamic Range (SDR), and in High Dynamic Range (HDR) using both the Perceptual Quantizer (PQ) and Hybrid Log Gamma (HLG) transfer characteristics, and presented in SDR as the backwards compatible rendering of the HLG representation. The quality of SDR HD was improved by approximately equal amounts by either increasing the dynamic range or increasing the resolution to UHD. A further smaller increase in quality was observed in the Mean Opinion Scores of the viewers by increasing both the dynamic range and the resolution, but this was not quite statistically significant.

关键词： video signal processing high dynamic range ultra-high definition display technology

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A real-time focused SAR algorithm on the Jetson TK1 board 22

A real-time focused SAR algorithm on the Jetson TK1 board

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conference on image and signal processing for Remote Sensing xxII

作者： Radecki, K. Samczynski, P. Kulpa, K. Drozdowicz, J. Warsaw Univ Technol Inst Elect Syst Warsaw Poland

ISBN: (数字)9781510604131

ISBN: (纸本)9781510604124;9781510604131

In this paper the authors present a solution based on a small and lightweight computing platform equipped with a graphics processing unit (GPU) which allows the possibility of performing a real-time fully focused SAR algorithm. The presented system is dedicated for airborne SAR applications including small SAR systems dedicated for medium-sized unmanned aerial vehicle (UAV) platforms. The proposed solution also reduces the need for a storage system. In the paper real SAR results obtained using a Frequency Modulation Continuous Wave (FMCW) radar demonstrator operating at 35 GHz carrier frequency with 1GHz bandwidth are presented. As a radar carrier an airborne platform was used. The presented SAR radar demonstrator was developed by the Warsaw University of Technology in cooperation with the Air Force Institute of Technology, Warsaw, Poland.

关键词： SAR imaging CUDA GPU JETSON TK1 focused SAR UAV portable platform processing

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