检索结果-内蒙古大学图书馆

IEEE International conference on image processing

作者： L. Ghouti A. Bouridane S. Boussakta Department of Information and Computer Science King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia School of Computer Science Queen''s University Belfast UK School of Electronic and Electrical Engineering University of Leeds UK

The emergence of digital multimedia and the proliferation of its use have raised major concerns about the protection of intellectual property. In response to these concerns, digital watermarks have emerged as a possible solution for protecting the intellectual property of digital content. In this paper, we derive estimates of data-hiding capacity of balanced multiwavelet transforms. This class of transforms, relatively new, has useful properties for image processing applications as shown in this paper. Furthermore, we investigate the relevance of two closely related statistical models, developed for scalar wavelets, for modeling the statistics of balanced multiwavelet transform coefficients. Finally, we present performance results of a spread spectrum watermarking system that is based on this new transform.

关键词： Watermarking Protection Intellectual property image processing Wavelet transforms Spread spectrum communication image coding signal processing Computer science Statistical distributions

来源：评论

学校读者我要写书评

暂无评论

A new image texture extraction algorithm based on matching pursuit Gabor wavelets

A new image texture extraction algorithm based on matching p...

引用

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

作者： M. Yaghoobi H.R. Rabiee M. Ghanbari M.B. Shamsollahi Digital Media Laboratory Sharif University of Technology Iran Department of Electronic Systems Engineering University of Essex UK Department of Electrical Engineering Sharif University of Technology Iran

Feature vector extraction, based on local image texture, is a primitive algorithm for many other applications, like segmentation, clustering and identification. If these feature vectors are a good match to the human visual system (HVS), we can expect to get the appropriate results by using them. Gabor filters have been used for this purpose successfully. In this paper we introduce a novel refinement, with the use of matching pursuits (MP) to improve the Gabor based texture feature extractor. With this improvement, we show that the separability of different textures increases. Another consideration in this work is computation complexity. Therefore, we limit the basis function set to reduce MP computation time.

关键词： Matching pursuit algorithms image texture Pursuit algorithms Filter bank Feature extraction signal processing algorithms image segmentation Gabor filters Humans Visual system

来源：评论

学校读者我要写书评

暂无评论

Texture classification using ridgelet transform

Texture classification using ridgelet transform

引用

International conference on Computational Intelligence and Multimedia applications

作者： S. Arivazhagan L. Ganesan T.G. Subash Kumar Department of ECE Mepco Schlenk Engineering College Sivakasi Tamil Nadu India Department of CSE A. C. College of Engineering and Technology Karaikudi Tamil Nadu India

Texture classification has long been an important research topic in image processing. Classification based on the wavelet transform has become very popular. wavelets are very effective in representing objects with isolated point singularities, but failed to represent line singularities. Recently, a ridgelet transform which deals effectively with line singularities in 2-D is introduced. It allows representing edges and other singularities along lines in a more efficient way. In this paper, the issue of texture classification based on a ridgelet transform has been analyzed. Features are derived from sub-bands of the ridgelet decomposition and are used for classification for a data set containing 20 texture images. Experimental results show that this approach allows to obtain a high degree of success in classification.

关键词： image texture analysis Wavelet transforms Wavelet packets Educational institutions image analysis Filter bank Gabor filters Head Biomedical signal processing Autocorrelation

来源：评论

学校读者我要写书评

暂无评论

wavelets in industrial applications: a review

Wavelets in industrial applications: a review

引用

conference on Wavelet applications in Industrial processing II

作者： Truchetet, F Laligant, O Univ Bourgogne F-21004 Dijon France

ISBN: (纸本)0819455601

This paper aims at reviewing the recent published works dealing with industrial applications of wavelet and, more generally speaking, multiresolution analysis. After a quick recall in a simple overview of the basics of wavelet transform and of its main variations, some of its applications are reviewed domain by domain, beginning with signal processing, continuous and discrete wavelet transform proceeding with image processing and applications. More than 150 recent papers are presented in these two sections.

关键词： wavelets Wavelet transforms signal processing Discrete wavelet transforms image compression image processing Analytical research Feature extraction Statistical analysis Video compression

来源：评论

学校读者我要写书评

暂无评论

Multiresolution versus single resolution horizon picking in 2D seismic images

Multiresolution versus single resolution horizon picking in ...

引用

conference on image and signal processing for Remote Sensing ix

作者： Faraklioti, A Petrou, M Univ Surrey Ctr Vis Speech & Signal Proc Sch Elect & Phys Sci Guildford GU2 5XH Surrey England

ISBN: (纸本)0819451215

In this paper, two different approaches for horizon picking are examined. The first one is a simple line detection algorithm applied to the full resolution image. The second algorithm is a multiscale line detection algorithm, based on the wavelet transform of the image. Both full resolution and multiresolution line detection algorithms are applied to 2D seismic images and compared in terms of their performance. Results show that the full resolution line detection approach outperforms the multiresolution approach.

关键词： image resolution wavelets Gaussian filters image segmentation image filtering Detection and tracking algorithms Wavelet transforms Edge detection Filtering (signal processing) Advanced distributed simulations

来源：评论

学校读者我要写书评

暂无评论

Comparative evaluation of semifragile watermarking algorithms

引用

JOURNAL OF ELECTRONIC IMAGING 2004年第1期13卷 209-219页

作者： Ekici, Ö Sankur, B Coskun, B Naci, U Akcay, M Univ Ottawa Sch Informat Technol & Engn Ottawa ON Canada Bogazici Univ Dept Elect & Elect Engn Istanbul Turkey

Semifragile watermarking techniques aim to prevent tampering and fraudulent use of modified images. A semifragile watermark monitors the integrity of the content of the image but not its numerical representation. Therefore, the watermark is designed so that the integrity is proven if the content of the image has not been tampered with, despite some mild processing on the image. However, if parts of the image are replaced with the wrong key or are heavily processed, the watermark information should indicate evidence of forgery. We compare the performance of eight semifragile watermarking algorithms in terms of their miss probability under forgery attack, and in terms of false alarm probability under nonmalicious signal processing operations that preserve the content and quality of the image. We propose desiderata for semifragile watermarking algorithms and indicate the promising algorithms among existing ones. (C) 2004 SPIE and IST.

关键词： Digital watermarking Quantization wavelets Smoothing Visualization Binary data Discrete wavelet transforms Electronic filtering Linear filtering signal processing

来源：评论

学校读者我要写书评

暂无评论

wavelets: A tool for efficient data representation

Wavelets: A tool for efficient data representation

引用

International conference on Computer Graphics, Imaging and Visualization (CGIV 2004)

作者： Lee, SL Natl Univ Singapore Singapore 117548 Singapore

ISBN: (纸本)0769521789

wavelets, which are a new mathematical tool for data representation, are discussed. wavelets are efficient in reducing the number of parameters in the representation. Efficient representation of data facilitates processing of information contained in the data. The applications of wavelets include image, video and other data compression, denoising, and signal separation.

关键词： Wavelet transforms

来源：评论

学校读者我要写书评

暂无评论

Denoising of multispectral images using wavelet thresholding

Denoising of multispectral images using wavelet thresholding

引用

conference on image and signal processing for Remote Sensing ix

作者： Scheunders, P Univ Antwerp Dept Phys Vis Lab B-2020 Antwerp Belgium

ISBN: (纸本)0819451215

In this paper a denoising technique for multispectral images exploiting interband correlations is proposed. A redundant wavelet transform is applied and denoising is applied by thresholding wavelet coefficients. A scale adaptive threshold value is obtained by exploiting the interband correlation of the signal. First, the coefficients from different bands are multiplied. For these products, the signal and noise probability density functions (pdf) become more separated. The high signal correlation between bands is exploited further by summing these products over all bands, in this way separating noise and signal pdfs even more. The noise pdf of the proposed quantities is derived analytically and from this, a wavelet threshold is derived. The technique is demonstrated to outperform single band wavelet thresholding on multispectral remote sensing images.

关键词： Interference (communication) wavelets signal to noise ratio Multispectral imaging Denoising Earth observing sensors Landsat Wavelet transforms Remote sensing Principal component analysis

来源：评论

学校读者我要写书评

暂无评论

Multiresolution fusion of remotely sensed images with the Hermite transform

Multiresolution fusion of remotely sensed images with the He...

引用

conference on image and signal processing for Remote Sensing ix

作者： Escalante-Ramírez, B López-Caloca, AA Zambrano-Gallardo, CF Ctr Invest Geog & Geomat Ing Jorge L Tamayo Mexico City 01900 DF Mexico

ISBN: (纸本)0819451215

The Hermite Transform is an image representation model that incorporates some important properties of visual perception such as the analysis through overlapping receptive fields and the Gaussian derivative model of early vision. It also allows the construction of pyramidal mutirresolution analysis-synthesis schemes. We show how the Hermite Transform can be used to build image fusion schemes that take advantage of the fact that Gaussian derivatives are good operators for the detection of relevant image patterns at different spatial scales. These patterns are later combined in the transform coefficient domain. applications of this fusion algorithm are shown with remote sensing images, namely LANDSAT, IKONOS, RADARSAT and SAR AeS-1 images.

关键词： multisensor image fusion multiresolution analysis Hermite transform noise reduction visual perception

来源：评论

学校读者我要写书评

暂无评论

Non-redundant, linear-phase, semi-orthogonal, directional complex wavelets

Non-redundant, linear-phase, semi-orthogonal, directional co...

引用

Proceedings - IEEE International conference on Acoustics, Speech, and signal processing

作者： Fernandes, Felix C.A. Wakin, Michael B. Baraniuk, Richard G. DSPS R and D Center Texas Instruments Dallas TX United States Department of Electrical Engineering Rice University Houston TX United States

The directionality and phase information provided by non-redundant complex wavelet transforms (NCWTs) provide significant potential benefits for image/video processing and compression applications. However, because existing NCWTs are created by downsampling filtered wavelet coefficients, the finest scale of these transforms has resolution 4× lower than the real input signal. In this paper, we propose a linear-phase, semi-orthogonal, directional NCWT design using a novel triband filter bank. At the finest scale, the resulting transform has resolution 3× lower than the real input signal. We provide a design example to demonstrate three important properties for image/video processing applications: directionality, magnitude coherency, and phase coherency.

关键词： image analysis

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：