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Author : Lin Liu
Publisher :
ISBN 13 :
Total Pages : 158 pages
Book Rating : 4.:/5 (451 download)
Download or read book Object-based Video Compression Technique Using Wavelet Transform written by Lin Liu and published by . This book was released on 2000 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Eric J. Balster
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (556 download)
Download or read book Video Compression and Rate Control Methods Based on the Wavelet Transform written by Eric J. Balster and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Wavelet-based image and video compression techniques have become popular areas in the research community. In March of 2000, the Joint Pictures Expert Group (JPEG) released JPEG2000. JPEG2000 is a wavelet-based image compression standard and predicted to completely replace the original JPEG standard. In the video compression field, a compression technique called 3D wavelet compression shows promise. Thus, wavelet-based compression techniques have received more attention from the research community. This dissertation involves further investigation of the wavelet transform in the compression of image and video signals, and a rate control method for real-time transfer of wavelet-based compressed video. A pre-processing algorithm based on the wavelet transform is developed for the removal of noise in images prior to compression. The intelligent removal of noise reduces the entropy of the original signal, aiding in compressibility. The proposed wavelet-based denoising method shows a computational speedup of at least an order of magnitude than previously established image denoising methods and a higher peak signal-to-noise ratio (PSNR). A video denoising algorithm is also included which eliminates both intra- and inter-frame noise. The inter-frame noise removal technique estimates the amount of motion in the image sequence. Using motion and noise level estimates, a video denoising technique is established which is robust to various levels of noise corruption and various levels of motion. A virtual-object video compression method is included. Object-based compression methods have come to the forefront of the research community with the adoption of the MPEG-4 (Motion Pictures Expert Group) standard. Object-based compression methods promise higher compression ratios without further cost in reconstructed quality. Results show that virtual-object compression outperforms 3D wavelet compression with an increase in compression ratio and higher PSNR. Finally, a rate-control method is developed for the real-time transmission of wavelet-based compressed video. Wavelet compression schemes demand a rate-control algorithm for real-time video communication systems. Using a leaky-bucket design approach, the proposed rate-control method manages the uncertain factors in both the acquisition time of the group of frames (GoF), computation time of compression/decompression algorithms, and network delay. Results show good management and control of buffers and minimal variance in frame rate.
Author : Chao He
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (645 download)
Download or read book Advanced Wavelet Application for Video Compression and Video Object Tracking written by Chao He and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Wavelet transform has become a very powerful tool for image/video compression and processing. In this dissertation we present our research in the area of three-dimensional (3-D) wavelet based video compression and Gabor wavelet based video object tracking, respectively. The wavelet transform has been successfully used for image compression [1]. Its success in image compression motivates a lot of researches in the wavelet transform based video compression. 3-D wavelet transform based video compression is a direction drawing many attentions. We investigates two topics in this area. The first topic is optimal 3-D zerotree (ZTR) structure for the 3-D wavelet based video compression. Many researches have been done to use the 3-D zerotree and 3-D wavelet transform in video compression. However, the problem of how to build a 3-D zerotree was not studied carefully. In this research, we study the theory behind building a zerotree and propose a new 3-D zerotree structure which generates better coding performance. The second topic is time and space efficiency of the 3-D wavelet transform based video compression for real time video applications. The 3D wavelet transform needs to save and process large 3-D data which is a bottle neck for real time applications. We investigate this issue and present a time and space efficient video codec utilizing integer wavelet transforms. The wavelet transform can represent signal in a multi-resolution way so it is also used in object tracking. We presents an object tracking method for object-based video processing which uses a 2-D Gabor wavelet transform (GWT), a 2-D triangular mesh and a 2-D golden section algorithm. The feature points are stochastically selected based on the energy of their GWT coefficients. The global placement of the feature points is determined by a 2-D mesh whose feature is the area of the triangles formed by the feature points. In order to find the corresponding object in the next frame, the 2-D golden section algorithm is employed, and this can be shown to be the fastest algorithm to find the maximum of a unimodal function.
Author : Cajetan M. Akujuobi
Publisher : Springer Nature
ISBN 13 : 3030875288
Total Pages : 657 pages
Book Rating : 4.0/5 (38 download)
Download or read book Wavelets and Wavelet Transform Systems and Their Applications written by Cajetan M. Akujuobi and published by Springer Nature. This book was released on 2022-02-02 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook is unique because of its in-depth treatment of the applications of wavelets and wavelet transforms to many areas, across many disciplines. The book is written to serve the needs of a one or two semester course at either the undergraduate or graduate level. The author uses a very simplified, accessible approach that de-emphasizes mathematical rigor. The presentation includes many diagrams to illustrate points being discussed and uses MATLAB for all of application code. The author reinforces concepts introduced in the book with easy to grasp review questions and problems, tailored to each specific chapter for better mastery of the subject matter. This book enables students to understand the fundamental concepts of wavelets and wavelet transforms, as well as how to use them for problem solutions in digital signal and image processing, mixed-signal testing, space applications, aerospace applications, biomedical, cyber security, homeland security and many other application areas.
Author : Pankaj N. Topiwala
Publisher : Springer Science & Business Media
ISBN 13 : 0306470438
Total Pages : 434 pages
Book Rating : 4.3/5 (64 download)
Download or read book Wavelet Image and Video Compression written by Pankaj N. Topiwala and published by Springer Science & Business Media. This book was released on 2006-04-18 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: An exciting new development has taken place in the digital era that has captured the imagination and talent of researchers around the globe - wavelet image compression. This technology has deep roots in theories of vision, and promises performance improvements over all other compression methods, such as those based on Fourier transforms, vectors quantizers, fractals, neural nets, and many others. It is this revolutionary new technology that is presented in Wavelet Image and Video Compression, in a form that is accessible to the largest audience possible. Wavelet Image and Video Compression is divided into four parts. Part I, Background Material, introduces the basic mathematical structures that underly image compression algorithms with the intention of providing an easy introduction to the mathematical concepts that are prerequisites for the remainder of the book. It explains such topics as change of bases, scalar and vector quantization, bit allocation and rate-distortion theory, entropy coding, the discrete-cosine transform, wavelet filters and other related topics. Part II, Still Image Coding, presents a spectrum of wavelet still image coding techniques. Part III, Special Topics in Still Image Coding, provides a variety of example coding schemes with a special flavor in either approach or application domain. Part IV, Video Coding, examines wavelet and pyramidal coding techniques for video data. Wavelet Image and Video Compression serves as an excellent reference and may be used as a text for advanced courses covering the subject.
Author : David J. Britch
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (643 download)
Download or read book Object-based Coding of Video Data Using the Wavelet Transform written by David J. Britch and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Madhuri A. Joshi
Publisher : CRC Press
ISBN 13 : 148222822X
Total Pages : 242 pages
Book Rating : 4.4/5 (822 download)
Download or read book Image and Video Compression written by Madhuri A. Joshi and published by CRC Press. This book was released on 2014-11-17 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Image and video signals require large transmission bandwidth and storage, leading to high costs. The data must be compressed without a loss or with a small loss of quality. Thus, efficient image and video compression algorithms play a significant role in the storage and transmission of data. Image and Video Compression: Fundamentals, Techniques, and Applications explains the major techniques for image and video compression and demonstrates their practical implementation using MATLAB® programs. Designed for students, researchers, and practicing engineers, the book presents both basic principles and real practical applications. In an accessible way, the book covers basic schemes for image and video compression, including lossless techniques and wavelet- and vector quantization-based image compression and digital video compression. The MATLAB programs enable readers to gain hands-on experience with the techniques. The authors provide quality metrics used to evaluate the performance of the compression algorithms. They also introduce the modern technique of compressed sensing, which retains the most important part of the signal while it is being sensed.
Author : Zhigang Gao
Publisher :
ISBN 13 :
Total Pages : 117 pages
Book Rating : 4.:/5 (184 download)
Download or read book Image/video Compression and Quality Assessment Based on Wavelet Transform written by Zhigang Gao and published by . This book was released on 2007 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Because of the contradiction of the vast data size of raw digital images and videos and the limited transmission bandwidth and storage space, it is essential to develop compression methodologies with high compression ratio and good reconstructed quality. It is also important to develop quality metrics which are consistent with human vision and easy to calculate. The spatial-frequency localization and multi-resolution capabilities of the wavelet transform make it a natural means of signal representation. This work investigates the advantages of the wavelet transform and focuses on the following research topics: 1) An image quality metric that assesses the quality of an image in the wavelet domain; 2) A quality constrained compression algorithm that compresses an image to a desired visual quality; 3) An innovative DWT-based temporal filtering scheme that achieves high compression ratio and reduces the ghost effect without motion estimation; 4) A virtual sub-object video coding scheme that is suitable for applications with static background.
Author : Dhaval R. Bhojani
Publisher : Springer Nature
ISBN 13 : 9811502455
Total Pages : 58 pages
Book Rating : 4.8/5 (115 download)
Download or read book Hybrid Video Compression Standard written by Dhaval R. Bhojani and published by Springer Nature. This book was released on 2019-09-18 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents compression techniques for digital video stream, describing their design using various image transforms, such as discrete cosine transform (DCT), discrete wavelet transform (DWT), and singular value decomposition (SVD). It first discusses the basic requirements and applications of video compression techniques. The book then addresses video compression using DCT as well as the hybrid compression technique, designed and implemented using DCT, DWT and SVD, demonstrating the simulation results for both. Lastly, it proposes future research directions in the field.
Author : Yuan Y. Tang
Publisher : Springer
ISBN 13 : 3540453334
Total Pages : 470 pages
Book Rating : 4.5/5 (44 download)
Download or read book Wavelet Analysis and Its Applications written by Yuan Y. Tang and published by Springer. This book was released on 2003-06-30 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the Second International Conference on Wavelet Analysis and Its Applications, WAA 2001, held in Hong Kong, China in December 2001. The 24 revised full papers and 27 revised short papers presented were carefully reviewed and selected from a total of 67 full paper submissions. The book offers topical sections on image compression and coding, video coding and processing, theory, image processing, signal processing, and systems and applications.
Author : Dominic Rüfenacht
Publisher : Springer
ISBN 13 : 9811082251
Total Pages : 203 pages
Book Rating : 4.8/5 (11 download)
Download or read book Novel Motion Anchoring Strategies for Wavelet-based Highly Scalable Video Compression written by Dominic Rüfenacht and published by Springer. This book was released on 2018-04-03 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: A key element of any modern video codec is the efficient exploitation of temporal redundancy via motion-compensated prediction. In this book, a novel paradigm of representing and employing motion information in a video compression system is described that has several advantages over existing approaches. Traditionally, motion is estimated, modelled, and coded as a vector field at the target frame it predicts. While this “prediction-centric” approach is convenient, the fact that the motion is “attached” to a specific target frame implies that it cannot easily be re-purposed to predict or synthesize other frames, which severely hampers temporal scalability. In light of this, the present book explores the possibility of anchoring motion at reference frames instead. Key to the success of the proposed “reference-based” anchoring schemes is high quality motion inference, which is enabled by the use of a more “physical” motion representation than the traditionally employed “block” motion fields. The resulting compression system can support computationally efficient, high-quality temporal motion inference, which requires half as many coded motion fields as conventional codecs. Furthermore, “features” beyond compressibility — including high scalability, accessibility, and “intrinsic” framerate upsampling — can be seamlessly supported. These features are becoming ever more relevant as the way video is consumed continues shifting from the traditional broadcast scenario to interactive browsing of video content over heterogeneous networks. This book is of interest to researchers and professionals working in multimedia signal processing, in particular those who are interested in next-generation video compression. Two comprehensive background chapters on scalable video compression and temporal frame interpolation make the book accessible for students and newcomers to the field.
Author : Raymond Westwater
Publisher : Springer
ISBN 13 : 0585323135
Total Pages : 164 pages
Book Rating : 4.5/5 (853 download)
Download or read book Real-Time Video Compression written by Raymond Westwater and published by Springer. This book was released on 2007-08-28 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Real-Time Video Compression: Techniques and Algorithms introduces the XYZ video compression technique, which operates in three dimensions, eliminating the overhead of motion estimation. First, video compression standards, MPEG and H.261/H.263, are described. They both use asymmetric compression algorithms, based on motion estimation. Their encoders are much more complex than decoders. The XYZ technique uses a symmetric algorithm, based on the Three-Dimensional Discrete Cosine Transform (3D-DCT). 3D-DCT was originally suggested for compression about twenty years ago; however, at that time the computational complexity of the algorithm was too high, it required large buffer memory, and was not as effective as motion estimation. We have resurrected the 3D-DCT-based video compression algorithm by developing several enhancements to the original algorithm. These enhancements make the algorithm feasible for real-time video compression in applications such as video-on-demand, interactive multimedia, and videoconferencing. The demonstrated results, presented in this book, suggest that the XYZ video compression technique is not only a fast algorithm, but also provides superior compression ratios and high quality of the video compared to existing standard techniques, such as MPEG and H.261/H.263. The elegance of the XYZ technique is in its simplicity, which leads to inexpensive VLSI implementation of any XYZ codec. Real-Time Video Compression: Techniques and Algorithms can be used as a text for graduate students and researchers working in the area of real-time video compression. In addition, the book serves as an essential reference for professionals in the field.
Author : Ahmad A. A. M. Bou-Shehri
Publisher :
ISBN 13 :
Total Pages : 204 pages
Book Rating : 4.E/5 ( download)
Download or read book Video Compression Via Object-based Adaptive Quantization written by Ahmad A. A. M. Bou-Shehri and published by . This book was released on 1994 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter Stavroulakis
Publisher : Springer Science & Business Media
ISBN 13 : 3642187625
Total Pages : 352 pages
Book Rating : 4.6/5 (421 download)
Download or read book Neuro-Fuzzy and Fuzzy-Neural Applications in Telecommunications written by Peter Stavroulakis and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the first time, this highly interdisciplinary book covers the applications of neuro-fuzzy and fuzzy-neural scientific tools in a very wide area within the communications field. It deals with the important and modern areas of telecommunications amenable to such a treatment.
Download or read book Network World written by and published by . This book was released on 1998-08-17 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: For more than 20 years, Network World has been the premier provider of information, intelligence and insight for network and IT executives responsible for the digital nervous systems of large organizations. Readers are responsible for designing, implementing and managing the voice, data and video systems their companies use to support everything from business critical applications to employee collaboration and electronic commerce.
Author : Naresh Sharma
Publisher :
ISBN 13 :
Total Pages : 61 pages
Book Rating : 4.:/5 (464 download)
Download or read book Arbitrarily Shaped Virtual-object Video Compression written by Naresh Sharma and published by . This book was released on 2009 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Therefore, this dissertation develops a compression method that further explores the advantages of object based compression, and uses shape adaptive wavelet transform for the coding of the arbitrarily shaped virtual-object thereby avoiding any blocking artifacts.
Author : Ali N. Akansu
Publisher : Springer Science & Business Media
ISBN 13 : 0306470470
Total Pages : 425 pages
Book Rating : 4.3/5 (64 download)
Download or read book Wavelet, Subband and Block Transforms in Communications and Multimedia written by Ali N. Akansu and published by Springer Science & Business Media. This book was released on 2006-04-18 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wavelet and subband transforms have been of great interest in the fields of - gineering and applied mathematics. The theories of these powerful signal p- cessing tools have matured and many applications utilizing them are emerging in different disciplines. This book, comprised of eleven chapter contributions from prominent researchers in the field, focuses on communications and mul- media applications of wavelet and subband transforms. The first six chapters of this book deal with a variety of communications applications that significantly benefit from wavelet and subband theories. S- ilarly, the remaining five chapters present recent advances in multimedia - plications of wavelet and subband transforms. These chapters interconnect the requirements of applications with the underlying theory and their engineering solutions. Hence, the reader can easily trace the entire path from fundamentals to the purpose and merit of application in hand. A combined list of references for the entire volume is given at the end of the text that should be helpful to the interested reader for a further study. This book is anticipated to be of particular interest to engineers and sci- tists who want to learn about state-of-the-art subband and wavelet transform applications as well as their theoretical underpinnings. It can also serve as a supplementary book for graduate level engineering and applied mathematics courses on wavelet and subband transforms.
