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检索条件"任意字段=17th Image Processing: Algorithms and Systems Conference, IPAS 2019"

共 249 条记录，以下是21-30 订阅

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Towards Real-Time three-Dimensional (3D) Imaging using Dynamic Metasurface Antennas 17

Towards Real-Time Three-Dimensional (3D) Imaging using Dynam...

引用

17th European conference on Antennas and Propagation (EuCAP)

作者： Skouroliakou, Vasiliki Molaei, Amir Masoud Yurduseven, Okan Queens Univ Belfast Inst Elect Commun & Informat Technol ECIT Belfast BT3 9DT Antrim North Ireland

ISBN: (纸本)9788831299077

Dynamic Metasurface Antennas (DMAs) have been recently proposed as a computational imaging platform that relaxes the hardware constraints. these antennas produce tailored radiation patterns to multiplex the spatial information from the scene compressing the measurements into a single channel. Despite simplifying the hardware layer, the compression of the signal sets challenges in image reconstruction. the indirect sampling of the imaged scene makes it necessary to use computationally intense sensing-matrix based solutions since Fourier-based image reconstruction techniques are not directly applicable. In this paper, a bistatic case using DMAs as transmit and receive apertures is discussed and a pre-processing step is proposed to render the measurement set compatible with conventional Fourier-based imaging algorithms. the performance of the reconstruction algorithm including the pre-processing step is demonstrated when the algorithm is parallelized using a single Graphical processing Unit (GPU) card arguing that real-time image reconstruction is possible when imaging with DMAs.

关键词： dynamic metasurface antennas microwave radar imaging three-dimensional imaging image reconstruction algorithms

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Stochastic Model on Low Resolution Characters and the Feature of Topological Invariant 17

Stochastic Model on Low Resolution Characters and the Featur...

引用

Joint 17th World Congress of International-Fuzzy-systems-Association / 9th International conference on Soft Computing and Intelligent systems (IFSA-SCIS)

作者： Matsuda, Takeshi Univ Nagasaki Dept Informat Secur 1-1-1 Manabino Nagoya Nagasaki 8512195 Japan

images data may contain low resolution characters, and it is not easy to estimate the given low resolution characters. this paper proposed the stochastic model of the low resolution characters and considered the topol... 详细信息

ISBN: (纸本)9781509049172

关键词： Estimation Field programmable gate arrays OFDM Modulation Filtration Clocks Signal processing algorithms

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Feedback alfa-rooting algorithm for medical image enhancement 17

Feedback alfa-rooting algorithm for medical image enhancemen...

引用

17th image processing: algorithms and systems conference, ipas 2019

作者： Voronin, V. Zelensky, A. Agaian, S. Don State Technical University Lab. «Mathematical Methods of Image Processing and Computer Vision Intelligent Systems» Gagarina 1 Rostov on Don Russia Moscow State University of Technology "STANKIN" Moscow Russia CUNY/ College of Staten Island Dept. of Computer Science New York United States

this paper presents a new combined local and global transform domain-based feedback image enhancement algorithm for medical diagnosis, treatment, and clinical research. the basic idea in using local alfa-rooting method is to apply it to different disjoint blocks with different sizes. the block size and alfa-rooting parameters driven through optimization using the Agaian's cost function (image enhancement non-reference quality measure). the presented new approach allows enhancing MRI and CT images with uneven lighting and brightness gradient by preserving the local image features/details. Extensive computer simulations (CS) on real medical images are offered to gage the presented method. CS shows that our method improves the contrast and enhances the details of the medical images effectively compared with the current state-of-art methods. © 2019, Society for Imaging Science and Technology.

关键词： Clinical research

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Specular reflection detection algorithm for endoscopic images 17

Specular reflection detection algorithm for endoscopic image...

引用

17th image processing: algorithms and systems conference, ipas 2019

作者： Voronin, V. Semenishchev, E. Zelensky, A. Agaian, S. Don State Technical University Dept. of Radio-Electronics Systems Gagarina 1 Rostov on Don Russia Moscow State University of Technology "STANKIN" Moscow Russia CUNY College of Staten Island Dept. of Computer Science New York United States

Endoscopy is a process that allows viewing/ visualize the inside of a human body. In this article, we propose a specular reflection detection algorithm for endoscopic images that utilizes intensity, saturation and gradient information. the proposed algorithm is a two-stage procedure: (a) image enhancement using an adaptive alpha-rooting algorithm and (b) an efficient reflection detection algorithm in the HSV color space. the extensive computer simulations show a significant improvement over state-of-the-art results for specular reflection detection and segmentation accuracy. © 2019, Society for Imaging Science and Technology.

关键词： Endoscopy

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Additive spatially correlated noise suppression by robust block matching and adaptive 3D filtering 17

Additive spatially correlated noise suppression by robust bl...

引用

17th image processing: algorithms and systems conference, ipas 2019

作者： Rubel, Oleksii Lukin, Vladimir Egiazarian, Karen National Aerospace University ''KhAI '' Department of Information and Communication Technologies Kharkiv Ukraine Tampere University of Technology Signal Processing Laboratory Tampere Finland

the evolution of modern sensors for image acquisition brings as much obstacles as many possibilities to obtain multidimensional data with high resolution and rich information. One of the most perceptible destructive factors in visual data is noise. Due to complexity of modern sensors and approaches to signal collecting or preprocessing, noise model becomes complicated. the article's goal is to introduce and solve a problem of suppressing additive spatially correlated noise (ASCN) which is present in images due to different sources and has various levels of correlation. It is shown that even modern filters attempting to suppress correlated noise often demonstrate unsatisfactory efficiency. Here we propose and analyze two modifications of 2D discrete cosine transform (DCT) based filter and the state-of-the-art BM3D technique. Both are based on accounting spatial spectrum of the noise by setting frequency-dependent thresholds. Furthermore, the modified BM3D filter exploits a similarity measure robust to noise spectrum in block matching. © 2018 Society for Imaging Science and Technology.

关键词： Additives

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Application of Blind Signal processing in image Watermarking systems 17

Application of Blind Signal Processing in Image Watermarking...

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17th International SoC Design conference (ISOCC)

作者： Chen, Chuen-Yau Lin, Cheng-Yuan Zou, Yi-Ze Hsiao, Hung-Ming Chen, Yen-Ting Natl Univ Kaohsiung Dept Elect Engn Kaohsiung 811 Taiwan Natl Taiwan Univ Sci & Technol Dept Elect Engn Taipei 106 Taiwan

ISBN: (纸本)9781728183312

In this paper, an efficient blind signal processing algorithm called relative-gradient bound component analysis algorithm that combines the concepts of the relative-gradient approach and the bound-component analysis is applied to the image watermarking systems. Unlike to the other blind-signal-processing algorithms, neither the inverse matrix nor the covariance matrix is necessary to be computed in this one. It can successfully extract the embedded watermark without the whittling process. the time complexity and the space complexity of this algorithm are both lower than those of the original bound component analysis algorithm.

关键词： blind signal bound component analysis

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Hyperspectral complex-domain image denoising: cube complex-domain BM3D (CCDBM3D) algorithm 18

Hyperspectral complex-domain image denoising: cube complex-d...

引用

18th image processing: algorithms and systems conference, ipas 2020

作者： Katkovnik, Vladimir Ponomarenko, Mykola Egiazarian, Karen Shevkunov, Igor Kocsis, Peter Tampere University TampereFIN 33101 Finland

We consider hyperspectral phase/amplitude imaging from hyperspectral complex-valued noisy observations. Block-matching and grouping of similar patches are main instruments of the proposed algorithms. the search neighborhood for similar patches spans both the spectral and 2D spatial dimensions. SVD analysis of 3D grouped patches is used for design of adaptive nonlocal bases. Simulation experiments demonstrate high efficiency of developed state-of-the-art algorithms. © 2020, Society for Imaging Science and Technology

关键词： Hyperspectral imaging

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An Iterative Algorithm for image Inpainting Using Aggregation Functions 17

An Iterative Algorithm for Image Inpainting Using Aggregatio...

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Joint 17th World Congress of International-Fuzzy-systems-Association / 9th International conference on Soft Computing and Intelligent systems (IFSA-SCIS)

作者： Gonzalez-Hidalgo, Manuel Massanet, Sebastia Mir, Amau Ruiz-Aguilera, Daniel Univ Balearic Isl SCOPIA Res Grp Dept Math & Comp Sci Cira ValldemossaKm 7-5 E-07122 Palma De Mallorca Balearic Island Spain

ISBN: (纸本)9781509049172

image inpainting is a prolific line of research due to its applications in restoration of missing or damaged areas of the image. In this paper, a novel iterative algorithm for image inpainting based on aggregation functions and penalty-based functions is presented. the algorithm combines diffusion-based and patch-based techniques. In each iteration of the algorithm, the level of consensus among the known pixels in a neighbourhood of each pixel is computed. If a minimum value of consensus is reached, the pixel is recovered by means of an aggregation of the known pixels of the neighbourhood through aggregation functions and penalty-based functions. Otherwise, a non-local search of similar patches is performed and then a similar aggregation but now of the centre pixels of those patches more similar to the region we must recover is carried out. Experiments on synthetic and natural images show the potential of this algorithm both from the qualitative and the quantitative points of view in comparison to other classical inpainting algorithms.

关键词： Estimation Field programmable gate arrays OFDM Modulation Filtration Clocks Signal processing algorithms

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Parallel Implementation of Edge-Directed image Interpolation on a Graphics processing Unit

Parallel Implementation of Edge-Directed Image Interpolation...

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17th IEEE International conference on Parallel and Distributed systems (ICPADS)

作者： Wu, Jiaji Li, Tao Huang, Bormin Xidian Univ Sch Elect Engn Xian Peoples R China Univ Wisconsin Space Sci & Engn Ctr Madison WI USA

ISBN: (纸本)9780769545769

the edge-directed interpolation scheme is a noniterative, orientation-adaptive method to enhance image resolution with better visual effect than conventional interpolation methods. It interpolates the missing pixels based on the covariance of a high-resolution image estimated from the covariance of the low-resolution image. In spite of the impressive performance, the computational complexity of covariance-based adaptation is significantly higher than that of the conventional linear interpolation algorithms. In this paper, we propose a GPU-based massively parallel version of the edge-directed interpolation scheme. A speedup of 61.7x can be achieved with respect to its single-threaded CPU counterpart in the host computer.

关键词： edge-directed interpolation Graphics processing Unit (GPU) CUDA parallel computing

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Modern Methods of image processing in Safety-Critical Applications within Intelligent Transportation System 1

引用

17th International conference on Transport systems Telematics (TST)

作者： Bubenikova, Emilia Franekova, Maria Kanalikova, Alzbeta Univ Zilina Fac Elect Engn Univ 8215-1 Zilina 01026 Slovakia

ISBN: (数字)9783319662510

ISBN: (纸本)9783319662510;9783319662503

Modern collision avoidance systems implemented into the Intelligent Transportation systems work on the base of the image information analysis. For the control of unintentional departure from the lane, the vehicles in Cooperative-intelligent Transportation systems use surveillance systems-Lane Departure Warning. A very important parameter of these systems is the reliability of the method of digital image information processing, which depends on the choice of the optimum algorithm for the detection of road markings in different light conditions. the parameters of image processing algorithms should be set on the base of software simulation with real collected traffic data. the contribution is focused on finding and testing effective methods of digital image processing algorithms to monitoring the crossing of lane with a focus on reliability evaluation.

关键词： Cooperative-intelligent transportation system Advanced driver assistance system Lane departure warning system image processing Detection algorithms Reliability

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