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检索条件"任意字段=2016 Conference on Design and Architectures for Signal and Image Processing, DASIP 2016"

共 951 条记录，以下是731-740 订阅

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Session 1: image processing on embedded systems

Session 1: Image processing on embedded systems

引用

conference on design and architectures for signal and image processing

作者： Paolo Meloni Image Processing on Embedded Systems University of Cagliari IT

image processing algorithms in today electronics market pose the need for increasing computation capabilities at a limited power budget. Modern applications in the robotics and cyber-physical systems domains require image acquisition, analysis and information extraction to be executed on embedded low-power, portable and autonomous devices, requiring novel architecture solutions to be studied and implemented. The papers in this session present three design cases targeting edge-cutting applications, exploiting heterogeneous embedded computing platforms.

关键词： image processing Algorithm design and analysis Robots Computer architecture Real-time systems Embedded systems Consumer electronics

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Gammatone filter based on stochastic computation

Gammatone filter based on stochastic computation

引用

International conference on Acoustics, Speech, and signal processing (ICASSP)

作者： Naoya Onizawa Shunsuke Koshita Shuichi Sakamoto Masahide Abe Masayuki Kawamata Takahiro Hanyu Research Institute of Tohoku University Sendai Japan Department of Electronic Engineering Tohoku University Sendai Japan Frontier Research Institute for Interdisciplinary Sciences Tohoku University Sendai Japan Tohoku Daigaku Sendai Miyagi JP

ISBN: (纸本)9781479999897

This paper introduces a design of a gammatone filter based on stochastic computation for area-efficient hardware. The gammatone filter well expresses the performance of human auditory peripheral mechanism and has a potential of improving advanced speech communications systems, especially hearing assisting devices and noise robust speech recognition systems. Using stochastic computation, a power-and-area hungry multiplier used in a digital filter is replaced by a simple logic gate, leading to area-efficient hardware. However, a straightforward implementation of the stochastic gammatone filter suffers from significantly low accuracy in computation, which results in a low dynamic range (a ratio of the maximum to minimum magnitude) due to a small value of a filter gain. To improve the computational accuracy, gain-balancing techniques are presented that represent the original gain as the product of multiple larger gains introduced at the second-order sections. As a result, the proposed techniques maintain the original gain of the filter while improving the computational accuracy. The proposed stochastic gammatone filters are designed and evaluated using MATLAB that achieves a high dynamic range of 71.71 dB compared with a low dynamic range of 5.47 dB in the straightforward implementation.

关键词： Gain Dynamic range image coding Transfer functions Logic gates Hardware Encoding

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design and application of novel morphological filter used in vehicle detection

Design and application of novel morphological filter used in...

引用

International conference on Computer and Information Science (ACIS)

作者： Munkhjargal Gochoo Damdinsuren Bayanduuren Uyangaa Khuchit Galbadrakh Battur Tan-Hsu Tan Sy-Yen Kuo Shih-Chia Huang School of Information and Communications Technology Mongolian University of Science and Technology Ulaanbaatar Mongolia Dept. of Electrical Engineering National Taiwan University Taipei Taiwan (ROC) Dept. of Electrical Engineering National Taipei University of Technology Taipei Taiwan (ROC)

ISBN: (纸本)9781509008070

In this paper we represent our proposed novel morphological filter developed under the scope of Taiwan-Mongolian co-project. We applied the implemented filter in vehicle detection from CCTV video signal. Our goalwas to develop a filter that can reduce the noise in background subtracted binary image, which created by camera shake, and unnecessary moving objects such as wave of the tree etc. We compared our filter performance with morphological open, close, erosion, dilation, and median filters. PSNR (Peak signal to Noise Ratio) is employed for evaluating the performance of the filters, our filter's PSNR was relatively higher (21.39) than the other method. Furthermore, we used our filter for vehicle detection, and detection rate was 100% as the other methods. Thus, we conclude the new filter is sufficient for denoising binary image, and suitable for vehicle detection.

关键词： Filtering theory Digital filters Filtering algorithms Vehicle detection PSNR Morphology image processing

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design of Space Atmospheric Polarization Observation Instrument

Design of Space Atmospheric Polarization Observation Instrum...

引用

2016 International conference on Artificial Intelligence: Techniques and Applications(AITA 2016)

作者： Hong WANG Qian DU Qi KONG

Map the sky polarization mode is an important feature of remote sensing observation sky effect,describes the polarization signal distribution in the whole sky. The observer instrument design of polarization image acquisition all sky in this paper is used to analyze the distribution of polarized light in the sky,the sky a preliminary determination of polarization distribution around several polarization neutral zone has ring distribution. Firstly,according to the atmosphere the polarization characteristics of information analysis,to determine the basic requirements of remote sensing polarization array design;secondly,gives the design idea of instrument all the components of the system;finally,to obtain the atmospheric observation chart like data processing,access to high quality space atmospheric polarization diagram. Basically meet the request of space atmospheric polarization observations.

关键词： Polarization Remote sensing Atmospheric neutral Zone Observation instruments

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Autonomous pallet localization and picking for industrial forklifts based on the line structured light

Autonomous pallet localization and picking for industrial fo...

引用

IEEE International conference on Mechatronics and Automation

作者： Shijun Wang Aixue Ye Hao Guo Jiaojiao Gu Xiaonan Wang Kui Yuan Institute of Automation Chinese Academy of Sciences Beijing China

ISBN: (纸本)9781509023974

This paper proposed an autonomous pallet handing method for industrial forklifts based on the line structured light sensor. The method mainly include two aspects. First, the design of the line structured light sensor based on embedded image processing board that contains a FPGA and a DSP. We solved the problem that Hessian matrix decomposition based light stripe center extraction cannot run in real time. Second, we installed the structured light sensor onto the automatic forklift, and the forklift detected and located the pallet using the geometry character of the pallets, then the controller drived the forklift docking in front of the pallet using position-based visual servoing and picking up the pallet at last. The line structured light sensor was designed using C6000 series visual processing boards developed by our research group. The experiment of the autonomous pallet localization and picking for industrial forklifts verifies the practicability and effectiveness of our proposed method.

关键词： Robot sensing systems Cameras Calibration Field programmable gate arrays Three-dimensional displays Service robots Digital signal processing

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FPGA-based accelerator design from a domain-specific language

FPGA-based accelerator design from a domain-specific languag...

引用

International conference on Field Programmable Logic and Applications

作者： M. Akif Özkan Oliver Reiche Frank Hannig Jürgen Teich Friedrich-Alexander University of Erlangen-Ntirnberg (FAU) Germany

A large portion of image processing applications often come with stringent requirements regarding performance, energy efficiency, and power. FPGAs have proven to be among the most suitable architectures for algorithms that can be processed in a streaming pipeline. Yet, designing imaging systems for FPGAs remains a very time consuming task. High-Level Synthesis, which has significantly improved due to recent advancements, promises to overcome this obstacle. In particular, Altera OpenCL is a handy solution for employing an FPGA in a heterogeneous system as it covers all device communication. However, to obtain efficient hardware implementations, extreme code modifications, contradicting OpenCL's data-parallel programming paradigm, are necessary. In this work, we explore the programming methodology that yields significantly better hardware implementations for the Altera Offline Compiler. We furthermore designed a compiler back end for a domain-specific source-to-source compiler to leverage the algorithm description to a higher level and generate highly optimized OpenCL code. Moreover, we advanced the compiler to support arbitrary bit width operations, which are fundamental to hardware designs. We evaluate our approach by discussing the resulting implementations throughout an extensive application set and comparing them with example designs, provided by Altera. In addition, as we can derive multiple implementations for completely different target platforms from the same domain-specific language source code, we present a comparison of the achieved implementations in contrast to GPU implementations.

关键词： Kernel Hardware Computer architecture Programming Field programmable gate arrays image processing

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A Adaptive Beamforming design in Low Sample Number Conditions Based on Diagonal Loading Algorithm

A Adaptive Beamforming Design in Low Sample Number Condition...

引用

2016 IEEE International conference on signal and image processing

作者： Yang Jian Liu rui-qi Xi xu-qi National Key Laboratory of Radar Signal Porcessing Xidian University Xi’an Research Institute of Hi-Tech Xi'an Research Institute of Hi-Tech

Under the condition of low sample, how to improve the robustness of adaptive beamforming algorithm is a key problem in engineering *** article first introduces the minimum variance distrtionless *** the basis, the algorithm of diagonal loading has been researched and how to select the optimal loading value in the practical application has been emphatically ***, the simulation based on certain array receiving system has verified the correctness of the algorithm.

关键词： Adaptive beamforming Low sample Diagonal loading Minimum variance distortionless response

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Overcoming resource underutilization in spatial CNN accelerators

Overcoming resource underutilization in spatial CNN accelera...

引用

International conference on Field Programmable Logic and Applications

作者： Yongming Shen Michael Ferdman Peter Milder Stony Brook University

Convolutional neural networks (CNNs) are revolutionizing a variety of machine learning tasks, but they present significant computational challenges. Recently, FPGA-based accelerators have been proposed to improve the speed and efficiency of CNNs. Current approaches construct an accelerator optimized to maximize the overall throughput of iteratively computing the CNN layers. However, this approach leads to dynamic resource underutilization because the same accelerator is used to compute CNN layers of radically varying dimensions. We present a new CNN accelerator design that improves the dynamic resource utilization. Using the same FPGA resources, we build multiple accelerators, each specialized for specific CNN layers. Our design achieves 1.3× higher throughput than the state of the art when evaluating the convolutional layers of the popular AlexNet CNN on a Xilinx Virtex-7 FPGA.

关键词： Digital signal processing Field programmable gate arrays Throughput Convolutional codes image segmentation Dynamic scheduling Adders

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design and implementation of adaptive Gaussian filters for the removal of salt and pepper noise on FPGA

Design and implementation of adaptive Gaussian filters for t...

引用

International conference on Electrical, Electronics, Communication, Computer and Optimization Techniques (ICEECCOT)

作者： P. Karthik N. C. Tejashwini Department of ECE KSSEM Bengaluru

ISBN: (纸本)9781509046980

In recent eras of image processing, during image acquisition and transfer, images are often corrupted by impulse noise which is a major factor affecting the contents of a digital image. In fixed-value impulse noise, the gray value is a fixed value, i.e., either 0 or 255 (example: Salt and pepper noise). Digital signal processing frequently involves some method for noise reduction over an image. The median filter is a non-linear digital filter, which is most popularly used to remove impulse noises. Many popular algorithms were presented which eliminates impulse noises present and maintains the fine details of the image. But, median filter fails to preserves the edges of the image by uniform modification of the noise affected pixels and the noise-free pixels. Also, the conventional filters work better only over images affected with low noise ratios and is very poor when the noise ratio reaches above 40%. The proposed de-noising algorithm uses an adaptive Gaussian filters for removal of salt and pepper noise. As conventional de-noising algorithm fails at high noise density and in preserving edges along with image details the proposed technique switches between mask sizes depending noise density. To preserve edges and details of the image Adaptive threshold is employed. Advantage of adaptive threshold filtering does not affect the edges or other small structures in the image. Hence this method is more efficient for the images with very high noise ratio and preserving edges.

关键词： Adaptive filters Maximum likelihood detection Nonlinear filters Filtering algorithms Optical filters image edge detection Digital filters

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image encryption and decryption in RNS domain based on {2n, 22n+1-1, 2n+1, 2n-1} moduli set

Image encryption and decryption in RNS domain based on {2n, ...

引用

International conference on Communication and Electronics Systems (ICCES)

作者： P. Venkata Narasa Reddy Rajasekhar Karumuri Jawaharlal Nehru Technological University - Kakinada Kakinada Andhra Pradesh IN Department of Electronics and Communication Engineering Jawaharlal Nehru Technological University Kakinada Kakinada India

ISBN: (纸本)9781509010677

In this brief, the implementation of efficient image encryption and decryption scheme in Residue Number System (RNS) is analyzed. The RNS domain is mainly chosen for its carry free parallel and fast arithmetic operations. But, the converters make RNS inefficient by having large delays. Hence, to use the RNS for our applications we must have the efficient converters. Here, we designed pure combinational logic based forward and reverse converters without using any preloaded ROM's. We used most efficient moduli set {2 n ,2 2n+1 -1,2 n +1,2 n -1} for realizing these converters. New Chinese Reminder theorem-II is used for the implementation of reverse converter. The image is encrypted by doing modular conversion using forward converted and the original image is decrypted using reverse converter.

关键词： Encryption Delays Algorithm design and analysis Adders Hardware signal processing algorithms Streaming media

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