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检索条件"主题词=Fast search algorithm"

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fast Inter-frame Prediction Based Array Processor for Depth Maps in 3D-HEVC

Fast Inter-frame Prediction Based Array Processor for Depth ...

引用

Asia-Pacific-Signal-and-Information-Processing-Association Annual Summit and Conference (APSIPA ASC)

作者： Zhu, Yun Jiang, Lin Song, Hui Xie, Xiaoyan Wang, Anqi Shen, Xubang Xian Univ Posts & Telecommun Xian Peoples R China Xian Univ Sci & Technol Xian Peoples R China Xian Microelect Technol Res Inst Xian Peoples R China

ISBN: (纸本)9789881476883

For the characteristics of the depth map with a large smooth area, it is not necessary in the 3D-High-Efficiency Video Coding (3D-HEVC) to use TZ search for inter-frame prediction. According to the parallelism of depth map interframe algorithms, analyzed the parallelism of full search, three-step search and diamond search in the array structure, this paper proposes a parallel implementation method of 3D-HEVC depth map inter-frame prediction based on array processor. Considering only the depth map encoding, the experimental results show that the synthesized frequency under the BEE4 FPGA chip is as high as 100.261MHZ. Compared with the software 3D-HEVC Test Model (HTM) version 16.1, without affecting the video quality, the speedup ratio of the full search mode can reach 35, the speedup ratio of the three-step search mode can reach 160, and the speedup ratio of the diamond search can reach 233.

关键词： 3D-HEVC Depth map Inter-frame prediction fast search algorithm

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A fast strategy for image matching using Hausdorff distance

A fast strategy for image matching using Hausdorff distance

引用

IEEE International Conference on Robotics, Intelligent Systems and Signal Processing

作者： Zhang, ZJ Huang, SB Shi, ZL Chinese Acad Sci Shenyang Inst Automat Dept 4 Shenyang 110016 Liaoning Peoples R China

ISBN: (纸本)078037925X

In this paper the problem of matching the modal in an image with a fast search strategy is discussed. While the Hausdorff measure yields a method to comparing edge images that is robust to object occlusion, image noise, and clutter etc, it requires high computational complexity in computing the Haursdorff distance between two edge point sets. A fast search strategy is proposed to reduce the computational load in this paper A similarity measure is defined in the proposed strategy. Experiments are performed on a large test set and the results show that the fast search strategy diminishes the number of positions that are in need of calculating Haursdorff distance to about one sixth of that in origination. Thus the computational load is reduced and it is helpful to use Hausdorff distance in real time image matching.

关键词： image matching search problems computational complexity real time image matching Hausdorff distance edge images computational complexity computational load fast search algorithm edge point sets

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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 ...

引用

IEEE International Conference on Multimedia and Expo Workshops (ICMEW)

作者： Paramkusam, A. V. Reddy, V. S. K. JNTUH Elect & Commun Hyderabad Andhra Pradesh India JNTUH MRCET Elect & Commun Hyderabad Andhra Pradesh India

ISBN: (纸本)9781479947614

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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Novel hardware-oriented integer motion estimation algorithms for high efficiency video coding 6

Novel hardware-oriented integer motion estimation algorithms...

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6th National-Foundation-for Science-and-Technology-Development (NAFOSTED) Conference on Information and Computer Science (NICS)

作者： Nguyen Vu Thang Vu Dac Tung Nguyen Duc Hoan Dao Ba Anh Hanoi Univ Sci & Technol Sch Elect & Telecommun Hanoi Vietnam

ISBN: (数字)9781728151632

ISBN: (纸本)9781728151632

The latest video coding standard High Efficiency Video Codec (HEVC) recommends diamond and square search algorithm as the fast integer motion estimation (IME). Besides, there are many other fast motion estimation algorithms, such as, 3-steps search, 4 steps search, etc. However, the complexity and structure of these algorithm's search patterns makes it difficult to implement in hardware. This paper proposes two novel IME hardware-friendly search patterns, so called Wide Diamond and Wide Hexagon. Comparing to the recommended fast search algorithm, experimental results show that the IME time taken is reduced 3 times and 5 times, respectively, in case of applying Wide Hexagon algorithm and Wide Diamond algorithm, while the bit rate and Peak signal to Noise ratio PSNR are virtually unchanged.

关键词： Integer Motion Estimation fast search algorithm hardware design H.265 HEVC

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An Effective Improvement on 3D SPIHT

An Effective Improvement on 3D SPIHT

引用

4th International Conference on Image Analysis and Signal Processing (IASP)

作者： Zhong Cuixiang Huaung Minghe Jiangxi Normal Univ Software Coll Nanchang 330022 Peoples R China

ISBN: (纸本)9781467325455

As an extension of 2D SPIHT, 3D SPIHT inherits the properties of 2D SPIHT, and is suited very well large for volume data compression such as video, medical images, and multispectral images. But it still contains a great deal of redundant search, having not fully improved coding speed. In order to solve this problem, the authors of this paper successfully proposed a fast search algorithm, which can be applied to improve the 3D SPIHT coding algorithm, greatly reducing redundant search and improving coding speed. Experiments also show that the improved 3D SPIHT is really faster than the original 3D SPIHT for image and video compression.

关键词： 3D SPIHT data compression fast search algorithm coding speed improvement

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A fast Inter-view Mode Selection algorithm Based on Video Array Processor

A Fast Inter-view Mode Selection Algorithm Based on Video Ar...

引用

Annual Summit and Conference of the Asia-Pacific-Signal-and-Information-Processing-Association (APSIPA ASC)

作者： Wang, Yu Li, Xueting Zhu, Yun He, Feilong Xian Univ Posts & Telecommun Xian Peoples R China

ISBN: (纸本)9781728132488

In the encoding depth map of 3D-HEVC, a fast block search algorithm is proposed to solve the problem of fixed block pattern of inter-view prediction algorithm. Variable block sizes mode is used to select prediction mode by comparing depth values, and then the algorithm is parallelly mapped to a video array processor. Compared with HTM16.2 software implementation, the average encoding time of the proposed algorithm is reduced by more than 100 times. In addition, the hardware resource usage is reduce by 27.21% with similar processing speeds.

关键词： depth map inter-view prediction fast search algorithm variable block parallel mapping

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Mobile video transmission system architecture based on MPEG-2 software codec

Mobile video transmission system architecture based on MPEG-...

引用

Conference on Multimedia Systems and Applications III

作者： Takishima, Y Yamashita, T Sakazawa, S Wada, M KDD R&D Labs Inc Kamifukuoka Saitama 3568502 Japan

ISBN: (纸本)081943874X

This paper proposes a common designing of a portable video transmitter that is featured by high-quality video compression and high-reliability/efficiency transmission protocol. For flexible video compression on a very small platform, a new software codec is deployed, which is accelerated with an innovative motion vector search algorithm and an adaptive picture prediction type selection. The compressed video is transmitted by the store-and-forward operation fortified with a newly proposed protocol that can deal with the network errors, unpredicted line cut-off and throughput declination in a high delay environment. A prototype system developed based on the proposed architecture is finally described. A notebook-based platform achieves MPEG-2 video transmission even from outdoor environment in particular for an urgent video coverage or quick video reporting.

关键词： MPEG-2 software codec mobile communications video material gathering store-and-forward motion vector fast search algorithm picture prediction type optimum value prediction high quality video

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Advanced One-bit Transform algorithm with Edge Enhancement and Representative Feature Extraction for Low-Complexity and Accurate Motion Estimation

Advanced One-bit Transform Algorithm with Edge Enhancement a...

引用

IEEE Region 10 Conference (TENCON)

作者： Chen, Hung-Yi Ding, Jian-Jiun Lee, Yih-Cherng Natl Taiwan Univ Grad Inst Commun Engn Taipei Taiwan

ISBN: (纸本)9781509011346

Motion estimation is an essential procedure in video coding and object tracing, but it always has a high computational load. Some low bit-depth motion estimation methods, such as one/two-bit transform or gray coding based methods, have lower complexity. However, one-bit transform based methods are sensitive to noise, whereas two-bit transform and gray coding methods use many bit planes or operations to perform motion estimation. In this paper, we select features with high representative by two means. First, we present an improved one-bit transform with pre-processing techniques. Second, an adaptive matching criterion was introduced to pick out features with higher representative. Moreover, a fast search algorithm is also proposed to reduce the searching cost. The experimental results show that the proposed algorithm outperforms other methods both in matching accuracy and in computation efficiency.

关键词： Motion estimation one-bit transform bit-plane matching fast search algorithm image enhancement

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Novel Adaptive Rood Path searches with Small Motion Prejudgments for fast Block Motion Estimation

Novel Adaptive Rood Path Searches with Small Motion Prejudgm...

引用

14th IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)

作者： Chen, Hung-Yi Ding, Jian-Jiun Lee, Yih-Cherng Natl Taiwan Univ Grad Inst Commun Engn Taipei Taiwan

ISBN: (纸本)9781538682401

Block matching based motion estimation (BMME) is widely used in video compression and stereoscopic image processing. Given that the full search algorithm is not efficient enough, many fast motion estimation algorithms are based on BMME. Adaptive rood path search (ARPS), which is an important process of the BMME method, exploits the inter-block correlation and zero-motion prejudgment to reduce the search cost. Although ARPS is very efficient, there is a gap between ARPS and full search in accuracy. In this manuscript, we propose a novel adaptive rood path search (N-ARPS) algorithm with small-motion prejudgment (SMP). SMP is to select appropriate search strategy for each block according to its motion properties. In addition, region of support (ROS) expansion is applied to have a better prediction for the initial search. Experimental results show that the proposed fast search algorithm has a near-optimal search accuracy and extremely lower computational complexity when compared with standard-of-the-art algorithms.

关键词： block matching motion estimation video coding fast search algorithm

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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 ...

引用

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

关键词： Block matching algorithm Motion estimation Multi layer motion estimation fast search algorithm

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