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24th International Conference on Microelectronics (ICM)

作者： Marzougui, M. Zoghlami, A. Atri, M. Tourki, R. Univ Monastir Lab Elect & Microelect Fac Sci Monastir Monastir 5000 Tunisia

ISBN: (纸本)9781467352895

Motion estimation is the process of determining the movement of blocks between adjacent video frames by which image information is assessed for similarities that can be reused in subsequent frames. However, computational complexity and resource sharing of the motion estimation algorithm poses great challenges for real time applications. Fast search algorithms emerged as important search technique to achieve real time tracking results. Among the different motion estimation algorithms block matching is the most common used technique. This paper presents a system-level implementation of a wavelet-based t+2D video coding. Three block matching motion estimation algorithms are implemented in order to evaluate the overall system performance. In fact, since the chip design and layout process is time consuming and expensive, it is very important to be able to predict the overall system performance in a high-level implementation before its circuit layout is deployed. The aim is to discuss the impact of different block matching motion estimation algorithms on video coding performance. Because of the complexity of the entire motion estimation system, decision in choosing one algorithm versus the other algorithms is often empirical and crucial.

关键词： motion estimation block matching algorithm t+2D wavelet transform video compression computation PSNR

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An Alternative Cross-Fusiform Search algorithm For Fast block matching Motion

An Alternative Cross-Fusiform Search Algorithm For Fast Bloc...

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International Conference on Computer Science and Network Technology

作者： Wen-Feng Li Jun-Wu Li-Feng Su Coll. of Electron. & Inf. Eng. Tongji Univ. Shanghai China

ISBN: (纸本)9781479905607

block matching algorithm is generally used in motion estimation. How to search with different shape or size in block matching algorithms has enormous impact on their search speed and distortion performance. Based on analysis the difference of search patterns in block matching algorithms, an alternative cross fusiform search algorithm for fast block motion estimation is proposed in this paper. This algorithm basically employs cross-shaped search pattern in first step and then performs block matching by using a pair of fusiform-shaped search patterns in the subsequence steps. Experimental results show that the proposed ACFS algorithm performs about 20% faster than HEXBS in most of sequences, whereas similar distortion performance is still maintained. In some sequences with small motion, ACFS can even obtain up to 90% speed improvement over HEXBS. Thus, ACFS is particularly suitable for video sequences with small/medium motion.

关键词： image matching motion estimation video signal processing ACFS algorithm block matching algorithm block matching motion estimation cross-fusiform search algorithm cross-shaped search pattern fusiform-shaped search patterns video sequences algorithm design and analysis Circuits and systems Diamonds Motion estimation Signal processing algorithms Vectors Video sequences block mathing cross center biased characteristic fusiform-shaped pattern motion estimation Video sequences block matching algorithm design and analysis Signal processing algorithms Video signal processing image matching diamonds Circuits and systems

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Hybrid-Template Adaptive Motion Estimation algorithm Based on block matching

Hybrid-Template Adaptive Motion Estimation Algorithm Based o...

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2010 International Conference on Computer and Communication Technologies in Agriculture Engineering(计算机与通信技术在农业工程国际会议 CCTAE 2010)

作者： Xiaoyue LIU Weijian CONG College of Computer and Automatic Control Hebei Polytechnic University Tangshan Hebei China

Motion vector field of video motion image sequences has the characteristic of center-biased and spacetime correlation. Aiming to the limitations of the existing fast block-matching motion estimation algorithms, this paper proposes a motion estimation algorithm which adaptively chooses different algorithm templates according to movement complexity and module precision. The experimental results show that the new algorithm can significantly improve the search speed of motion estimation, and saves a lot of time of motion estimation, under the premise of ensuring the quality of the reconstructed image.

关键词： motion estimation block matching algorithm hybrid template adaptive

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Hybrid-Template Adaptive Motion Estimation algorithm Based on block matching

Hybrid-Template Adaptive Motion Estimation Algorithm Based o...

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2010 International Conference on Computer and Communication Technologies in Agriculture Engineering (CCTAE 2010)

作者： Xiaoyue LIU College of Computer and Automatic Control Hebei Polytechnic University Tangshan,Hebei,China Weijian CONG College of Computer and Automatic Control Hebei Polytechnic University Tangshan,Hebei,China

Motion vector field of video motion image sequences has the characteristic of center-biased and space-time *** to the limitations of the existing fast block-matching motion estimation algorithms,this paper proposes a motion estimation algorithm which adaptively chooses different algorithm templates according to movement complexity and module *** experimental results show that the new algorithm can significantly improve the search speed of motion estimation,and saves a lot of time of motion estimation,under the premise of ensuring the quality of the reconstructed image.

关键词： motion estimation block matching algorithm hybrid template adaptive

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A NOVEL block-matching MOTION ESTIMATION algorithm BASED ON MULTI-LAYER CONCEPT

A NOVEL BLOCK-MATCHING MOTION ESTIMATION ALGORITHM BASED ON ...

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IEEE International Conference on Multimedia and Expo

作者： A. V. PARAMKUSAM V. S. K. REDDY Electronics and Communication Electronics and Communication MRCET

ISBN: (纸本)9781479947607

Most of the fast search motion estimation algorithms reduce the computational cost of motion estimation greatly by checking only a few search points inside the search area by using full distortion measure. This paper proposes a multi-layer motion estimation which employs partial distortion as its distortion measure to reduce the number of computations involved in each search point instead of reducing the number of search points. A layer is an image which is derived from the reference frame such that the sum of a block of pixels in the reference frame determines the point of a layer. It has been noticed on different video sequences that many motion vectors on the layers are the same as those searched on the reference frame. Experimental results on a wide variety of video sequences show that the proposed algorithm outperforms the other popular conventional fast search motion estimation algorithms computationally while maintaining the motion prediction quality very close to the full-search algorithm.

关键词： block matching algorithm Motion estimation Multi layer motion estimation Fast search algorithm

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A LIP-TRACKING SYSTEM BASED ON MORPHOLOGICAL PROCESSING AND block matching TECHNIQUES

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SIGNAL PROCESSING-IMAGE COMMUNICATION 1994年第4期6卷 335-348页

作者： MAK, MW ALLEN, WG NORTHUMBRIA UNIV DEPT ELECT ELECTR ENGN & PHYSNEWCASTLE NE1 8STENGLAND

This paper describes the application of image processing techniques in extracting the lip kinematics parameters (velocity and displacement) from image sequences. The centres of the lips are located by morphological image processing and cluster analysis. The motion of the lips is determined by a block matching algorithm. The paper presents a modified block matching algorithm which solves the problems caused by uniform shading and texture. The paper also describes a method which transforms the motion vectors into lip velocities and displacements. Moreover, the correlation between the lip information and the speech signals is demonstrated. Finally, the paper explains how the lip-tracking system can be applied to speech segmentation. The principal results show that lip information alone is not sufficient for speech segmentation. However, lip information may assist an audio speech segmentation system if the speech signals are corrupted by noise.

关键词： LIP-READING MORPHOLOGICAL IMAGE PROCESSING block matching algorithm MOTION VECTOR MOTION ESTIMATION ARTICULATORY DYNAMICS SPEECH SEGMENTATION

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Customized Nios II multi-cycle instructions to accelerate block-matching techniques

Customized Nios II multi-cycle instructions to accelerate bl...

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Conference on Real-Time Image and Video Processing

作者： Gonzalez, Diego Botella, Guillermo Garcia, Carlos Baese, Anke Meyer Baese, Uwe Meyer Prieto-Matias, Manuel Univ Complutense Madrid Dept Comp Architecture E-28040 Madrid Spain Florida State Univ Dept Comp Sci Tallahassee FL 32310 USA Florida State Univ Dept Elect & Comp Engn Tallahassee FL 32310 USA

ISBN: (纸本)9781628414905

This study focuses on accelerating the optimization of motion estimation algorithms, which are widely used in video coding standards, by using both the paradigm based on Altera Custom Instructions as well as the efficient combination of SDRAM and On-Chip memory of Nios II processor. Firstly, a complete code profiling is carried out before the optimization in order to detect time leaking affecting the motion compensation algorithms. Then, a multi-cycle Custom Instruction which will be added to the specific embedded design is implemented. The approach deployed is based on optimizing SOC performance by using an efficient combination of On-Chip memory and SDRAM with regards to the reset vector, exception vector, stack, heap, read/write data (. rwdata), read only data (. rodata), and program text (. text) in the design. Furthermore, this approach aims to enhance the said algorithms by incorporating Custom Instructions in the Nios II ISA. Finally, the efficient combination of both methods is then developed to build the final embedded system. The present contribution thus facilitates motion coding for low-cost Soft-Core microprocessors, particularly the RISC architecture of Nios II implemented in FPGA. It enables us to construct an SOC which processes 50x50 @ 180 fps.

关键词： Computer Vision Optical Flow MPEG Compression block matching algorithm NIOS II FPGA Custom Instructions Embedded Systems

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Low Power block matching Using Pattern based Pixel Truncation 58

Low Power Block Matching Using Pattern based Pixel Truncatio...

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IEEE 58th International Midwest Symposium on Circuits and Systems (MWSCAS)

作者： Choi, Minsu Kim, Kyung Rae Chang, Ik Joon Kim, Jinsang Kyung Hee Univ Dept Elect & Radio Engn Yongin South Korea

ISBN: (纸本)9781467365574

A power efficient block matching algorithm is proposed using pattern based pixel truncation scheme. Our observation shows that during block matching, if we represent the block matching process as a one-dimensional signal, we can see clearly that the signal has repeated mountain-and valley-like regions. Utilizing this feature, the proposed low power block matching scheme truncates pixels except the pixels of the valley-like SAD values, which have high chance to be the minimum SAD value. We synthesized the proposed algorithm to measure the switching power dissipation. The results show that the proposed BMA architecture obtains at least 76% power saving with negligible coding performances.

关键词： Pixel truncation block matching algorithm VLSI implementation motion estimation SAD

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Optimization of block-matching algorithms using custom instruction-based paradigm on NIOS II microprocessors

Optimization of block-matching algorithms using custom instr...

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Conference on Independent Component Analyses, Compressive Sampling, Wavelets, Neural Net, Biosystems, and Nanoengineering XI

作者： Gonzalez, Diego Botella, Guillermo Baese, Anke Meyer Baese, Uwe Meyer Florida State Univ Dept Elect & Comp Engn Tallahassee FL 32310 USA

ISBN: (纸本)9780819495419

This paper focuses on the optimization of video coding standards motion estimation algorithms using Altera Custom Instructions based-paradigm and the combination of SDRAM with On-Chip memory in NIOS II processors. On one hand a complete algorithm profiling is achieved before the optimization, in order to find the code time leaks, afterward is developing a custom instruction set which will be added to the specific embedded design enhancing the original system. On the other hand, all possible permitted memories combinations between On-Chip memory and SDRAM have been tested for achieving the best performance combination. The final performance of the final design (memory optimization and custom instruction acceleration) is shown. This contribution, thus, outlines a low cost system, mapped on a Very Large Scale Integration (VLSI) technology which accelerates software algorithms by converting them to custom hardware logic block and shows the best combination between On-Chip memory and SDRAM for the NIOS II processor.

关键词： Computer Vision Optical Flow MPEG Compression block matching algorithm NIOS II FPGA Custom Instructions Embedded Systems

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Modified Rho-Square Method for very fast block matching in motion estimation for video compression

Modified Rho-Square Method for very fast block matching in m...

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IEEE International Conference on Machine Intelligence Research and Advancement (ICMIRA)

作者： Bali, Ankit Mahajan, Ghansparsh Khajuria, Mukul Pandit, Amit Kant Shri Mata Vaishno Devi Univ Sch Elect & Commun Engn Katra India

ISBN: (纸本)9780769550138

This Paper presents an efficient block search method for fast motion estimation and subsequently compensation in the video compression. In video compression motion estimation and compensation is the most vital task, block matching technique is utilised for the motion estimation and compensation, and it consumes maximum resources in term of computation. It was proposed in [8] how to calculate the rate i.e. the motion estimation faster. We have further modified the Rho-Square search (RS)[8] algorithm to be less computation intensive and reach the optimal solution faster. The proposed methodology is compared with RS to show that the proposed methodology gives faster and efficient results at comparable and or better results.

关键词： block matching algorithm video compression motion estimation rho-square method diamond search

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