检索结果-内蒙古大学图书馆

A FAST fractal coding IN APPLICATION OF IMAGE RETRIEVAL

fractalS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY 2009年第4期17卷 441-450页

作者： Wang, Xing-Yuan Chen, Zhi-Feng Dalian Univ Technol Sch Elect & Informat Engn Dalian 116024 Peoples R China

Aiming at content-based image retrieval (CBIR) in fractal domain, this paper puts forward a fast fractal encoding method to extract image features, which is based on a novel non-searching and adaptive quadtree division. As a result, it enhances fractal coding speed sharply, only needs 0.0485 seconds on average for a 256 x 256 image and is approximately 70 times faster than algorithm in addition to good reconstructed image quality. Furthermore, this paper improves image matching algorithm, consequently enhancing the accuracy of query results. In addition, we present a method to further accelerate image retrieval based on the analysis to fractal codes distance and number. Experimental results show that our proposed method is performs highly in retrieval speed and feasible in retrieval accuracy.

关键词： fractal coding Non-Searching Average Block Content-Based Image Retrieval CBIR

来源：评论

学校读者我要写书评

暂无评论

A new modified fast fractal image compression algorithm

引用

IMAGING SCIENCE JOURNAL 2013年第2期61卷 219-231页

作者： Salarian, M. Nadernejad, E. Naimi, H. M. Univ Allame Mohaddes Noori Dept Elect Engn Noor Iran Tech Univ Denmark Dept Photon Engn Coding & Visual Commun Grp Copenhagen Denmark Babol Univ Technol Dept Elect & Comp Engn Babol Sar Iran

In this paper, a new fractal image compression algorithm is proposed, in which the time of the encoding process is considerably reduced. The algorithm exploits a domain pool reduction approach, along with the use of innovative predefined values for contrast scaling factor, S, instead of searching it across. Only the domain blocks with entropy greater than a threshold are considered to belong to the domain pool. The algorithm has been tested for some well-known images and the results have been compared with the state-of-the-art algorithms. The experiments show that our proposed algorithm has considerably lower encoding time than the other algorithms giving approximately the same quality for the encoded images.

关键词： image compression fractal coding multi-resolution

来源：评论

学校读者我要写书评

暂无评论

A Performance Analysis of Efficient Schemes and Algorithms in Image Denoising Procedures

A Performance Analysis of Efficient Schemes and Algorithms i...

引用

3rd International Conference on Computer Communication and Informatics (ICCCI)

作者： Gayathri, R. Sabeenian, R. S. AVS Engn Coll Dept Elect & Commun Salem 636003 Tamil Nadu India Sona Coll Technol Dept Elect & Commun Engn Salem 636005 Tamil Nadu India

ISBN: (纸本)9781467329071;9781467329064

Noise removing algorithms of spatial domain and various other domains find much useful in real time noise removal techniques such as medical imaging and satellite imaging applications. The order of noise and performance measures to be analyzed decides the type of denoising algorithm. The intensity based image denoising procedures and image fractal based denoising procedures are providing wider applications related to the field processing the visual information and structural similarity. In this paper many denoising procedures are analyzed to list out the performance measures of efficient techniques for improving image quality by preserving sharp details.

关键词： Image denoising Image Filtering fractal coding Laser active imaging color Image Restoration

来源：评论

学校读者我要写书评

暂无评论

Analyzing Performance of the Parallel-based fractal Image Compression Problem on Multicore Systems

引用

AASRI Procedia 2013年 5卷 140-146页

作者： Roberto de Quadros Gomes Vladimir Guerreiro Rodrigo da Rosa Righi Luiz Gonzaga da Silveira Jinyoung Yang Applied Computing Graduate Program –PIPCA - UNISINOS–Unisinos Avenue 950 São Leopoldo RS Brazil Korean Advanced Institute of Science and Technology –KAIST – 291 Daehak-ro Yuseong-gu Daejeon 305-701South Korea

Both the size and the resolution of images always were key topics in the graphical computing area. Especially, they become more and more relevant in the big data era. We can observe that often a huge amount of data is exchanged by medium/low bandwidth networks or yet, they need to be stored on devices with limited space of memory. In this context, the present paper shows the use of the fractal method for image compression. It is a lossy method known by providing higher indexes of file reduction through a highly time consuming phase. In this way, we developed a model of parallel application for exploiting the power of multiprocessor architectures in order to get the fractal method advantages in a feasible time. The evaluation was done with different-sized images as well as by using two types of machines, one with two and another with four cores. The results demonstrated that both the speedup and efficiency are highly dependent of the number of cores. They emphasized that a large number of threads does not always represent a better performance.

关键词： Parallel Programing fractal coding Multicore architectures Parallel modeling Threads Performance analysis

来源：评论

学校读者我要写书评

暂无评论

A new modified fast fractal image compression algorithm

引用

The Journal of Photographic Science 2013年第2期61卷 219-231页

In this paper, a new fractal image compression algorithm is proposed, in which the time of the encoding process is considerably reduced. The algorithm exploits a domain pool reduction approach, along with the use of innovative predefined values for contrast scaling factor,S, instead of searching it across. Only the domain blocks with entropy greater than a threshold are considered to belong to the domain pool. The algorithm has been tested for some well-known images and the results have been compared with the state-of-the-art algorithms. The experiments show that our proposed algorithm has considerably lower encoding time than the other algorithms giving approximately the same quality for the encoded images.

关键词： image compression fractal coding multi-resolution

来源：评论

学校读者我要写书评

暂无评论

Analyzing Performance of the Parallel-based fractal Image Compression Problem on Multicore Systems

Analyzing Performance of the Parallel-based Fractal Image Co...

引用

The 2013 AASRI Conference on Parallel and Distributed Computing and Systems(DCS 2013)

作者： Roberto de Quadros Gomes Vladimir Guerreiro Rodrigo da Rosa Righi Luiz Gonzaga da Silveira Jr. JinyoungYang Applied Computing Graduate Program-PIPCA-UNISINOS-Unisinos Avenue 950 Korean Advanced Institute of Science and Technology-KAIST-291 Daehak-ro

Both the size and the resolution of images always were key topics in the graphical computing ***,they become more and more relevant in the big data *** can observe that often a huge amount of data is exchanged by medium/low bandwidth networks or yet,they need to be stored on devices with limited space of *** this context,the present paper shows the use of the fractal method for image *** is a lossy method known by providing higher indexes of file reduction through a highly time consuming *** this way,we developed a model of parallel application for exploiting the power of multiprocessor architectures in order to get the fractal method advantages in a feasible *** evaluation was done with different-sized images as well as by using two types of machines,one with two and another with four *** results demonstrated that both the speedup and efficiency are highly dependent of the number of *** emphasized that a large number of threads does not always represent a better performance.

关键词： Parallel Programing fractal coding Multicore architectures Parallel modeling Threads Performance analysis

来源：评论

学校读者我要写书评

暂无评论

Research and Progress of Image Compression coding Based on Wavelet

Research and Progress of Image Compression Coding Based on W...

引用

7th International Conference on MEMS, NANO and Smart Systems (ICMENS 2011)

作者： Cui Yue-li Chen Zhi-gang Chen Ai-hua Taizhou Univ Coll Phys & Elect Engn Taizhou Peoples R China

ISBN: (纸本)9783037853122

Image compression is a technology using as little as possible bits to represent the original image. As wavelet transform has local characteristics on the time and frequency domain, it makes up the deficiency of DCT. Moreover, its multi-resolution characteristics can easily associate with the human visual system (HVS). Besides, wavelet-based image compression is prone to combine with new image coding methods. It has become the research hotspots at present. This paper introduces wavelets theory and discusses the research status and progress of wavelet-based image compression then points out the main problems. Finally, the prospect in the future was presented.

关键词： Image compression Wavelet transform Wavelet base fractal coding

来源：评论

学校读者我要写书评

暂无评论

Mean-classified and hierarchical block matching watermarking in fractal coding

Mean-classified and hierarchical block matching watermarking...

引用

4th International Conference on Intelligent Information Hiding and Multimedia Signal Processing

作者： Guo, Jing-Ming Yang, Chung-Te Lee, Jiann-Der Natl Taiwan Univ Sci & Technol Dept Elect Engn Taipei Taiwan Chang Gung Univ Dept Elect Engn Taoyuan Taiwan

ISBN: (纸本)9780769532783

This study presents two watermarking approaches in fractal coding images. The fast method, namely Mean-Classified fractal coding (MCFC), partitions the domain blocks of an image into groups according the mean values. As documented in experimental results, a high embedding capacity can be achieved with good image quality. Moreover, the MCFC is proved of highly robust to against many types of attacks, including JPEG, tampering, and rotating. The second method, namely Hierarchical Block Matching fractal coding (HBMFC), utilizes different domain block sizes to enlarge the searching pool with slightly sacrificing the coding gain. The HBMFC is mainly adapted to fragile watermarking, which can be applied to authentication application to prevent from illegal alteration.

关键词： watermarking fractal coding range block domain block mean-classified fractal coding hierarchical block matching fractal coding

来源：评论

学校读者我要写书评

暂无评论

An Improved Approach for Cell Image Recognition based on fractal coding and fractal Singular Value Neighbor Distance

An Improved Approach for Cell Image Recognition based on Fra...

引用

International Symposium on Knowledge Acquisition and Modeling

作者： Shi, Shanshan Ji, Guangrong Zheng, Haiyong Ocean Univ China Dept Elect Engn Qingdao Peoples R China

ISBN: (纸本)9781424435296

Based on fractal coding and fractal singular value neighbor distance, an improved approach for cell image recognition is proposed in this paper. fractal singular value neighbor distance is brought forward based on fractal neighbor distance and singular value decomposition. fractal coding and local singular value decomposition are used to improve the recognition rate. The experimental results show that the method can keep a good robustness to the variation of illumination, pose and expression, compared with traditional fractal neighbor distances. Furthermore, the method shows that the training time is short and recognition rate is high.

关键词： Cell image recognition fractal coding fractal neighbor distance Singular value decomposition fractal singular value neighbor distance

来源：评论

学校读者我要写书评

暂无评论

An Improved Approach for Cell Image Recognition based on fractal coding and fractal Singular Value Neighbor Distance

An Improved Approach for Cell Image Recognition based on Fra...

引用

2008 IEEE International Symposium on Knowledge Acquisition and Modeling Workshop(KAM 2008)

作者： Shanshan Shi Department of Electronic Engineering Ocean University of China Qingdao,ChinaGuangrong Ji Department of Electronic Engineering Ocean University of China Qingdao,ChinaHaiyong Zheng Department of Electronic Engineering Ocean University of China Qingdao,China

Based on fractal coding and fractal singular value neighbor distance,an improved approach for cell image recognition is proposed in this *** singular value neighbor distance is brought forward based on fractal neighbor distance and singular value *** coding and local singular value decomposition are used to improve the recognition *** experimental results show that the method can keep a good robustness to the variation of illumination,pose and expression,compared with traditional fractal neighbor ***,the method shows that the training time is short and recognition rate is high.

关键词： Cell image recognition fractal coding fractal neighbor distance Singular value decomposition fractal singular value neighbor distance.

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：