Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 45 for “"compression algorithm"”.
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Hardware Implementation of a Novel Image Compression Algorithm
… bringing the need for efficient and effective compression. Image compression is important for effective storage and transmission of images. Many techniques have been developed in the past, including transform coding, vector quantization and neural networks. In this thesis, a novel adaptive …
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Parallelizing the GSM speech compression algorithm on Raw
The GSM speech encoding algorithm, a widely used compression algorithm in mobile communications, was parallelized on Raw, a highly distributed hardware architecture with low latency communication. Parallelization architectures designed included a 2-stage pipeline and a 5-node satellite-hub model …
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Adaptive Compression Algorithm For Full Colour Three Dimensional Integral Images
… that to exploit this coiTelation effect the compression technique is based around the three dimensional Discrete Cosine Transform. To enable accurate compression and de-compression of image data, the scanned image must be aligned coiTcctly to take advantage of the inherent structure imposed …
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Implementation of bitmask based code compression algorithm on MSP430 microcontroller
… In this thesis, we have discussed one code compression technique known as bitmask based code compression algorithm in detail and have implemented it on Texas Instrument’s MSP430 microcontroller. Using this technique, we were able to achieve a compression ratio of about 62-76%. We also …
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Joint routing protocol and image compression algorithm for prolonging node lifetime in wireless sensor network
… reduce the transmitted data size, a lossy image compression technique based on adaptive Haar wavelet transform has been implemented. The simulation designs based on MATLAB consists of 100 randomly distributed nodes over an area of 100 m2, with 30 Kbits and 40 Kbits of packet sizes. The comparison …
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A lossy image compression algorithm based on nonuniform sampling and interpolation of the image intensity surface
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1990.
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Efficient image compression system using a CMOS transform imager
… on the implementation of the efficient image compression system among the many potential applications of a transform imager system. The study includes implementing the image compression system using a transform imager, developing a novel image compression algorithm for the system, and …
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An Object Oriented Implemtation of Fractal Image Compression
The technique of Fractal Image Compression, although new, has been described in several ways. Thus far, all descriptions of this compression algorithm read by the author have been in procedural form. The purpose of this paper is to present the Fractal Image Compression algorithm in an …
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Exploring data compression for a distributed aerial relay application
… the signals across the relays. A distributed compression algorithm is proposed and applied to both simulated and collected data. We conclude that a compression algorithm across the relays offers a substantial decrease in bit rate requirement, and that a preprocessing step can make the …
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Fast Parallel Algorithms for Universal Lossless Source Coding
The O(N/B) parallel compression algorithm estimates the MDL source among all tree sources whose maximal depth is log( N/B). This algorithm can be extended to parallel algorithms that support unbounded context depths. This will provide low redundancy performance over a much broader class of sources, …
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Accelerating distributed neural network training with network-centric approach
… To reduce the communication time, we propose an algorithm/hardware co-design, INCEPTIONN. More specifically, observing that gradients are much more tolerant to precision loss than parameters, we first propose a gradient-centric distributed training algorithm. As designed to exchange only …
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The design, implementation and analysis of a wavelet-based video codec
… the development of a new wavelet-based video compression algorithm which is based on the 3D wavelet transform, and requires no complicated motion estimation techniques. The proposed codec processes a sequence of images in a group of frames (GOF) by first transforming the group spatially and …
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Digital image transformation and compression
Compression algorithms have tended to cater only for high compression ratios at reasonable levels of quality. Little work has been done to find optimal compression methods for high quality images where no visual distortion is essential. The need for such algorithms is great, particularly for …
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Geometric Algorithms for Objects in Motion
… the issues of robustness, data collection and compression, realistic theoretical analyses of this compression, and data retrieval. Robust statistics is the study of statistical estimators that are robust to data outliers. The combination of robust statistics and data structures for moving …
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Practical algorithms for image compression and surface estimation
Practical Algorithms for Image Compression and Surface Estimation describes three algorithms for image compression and one algorithm for surface estimation that incorporates kriging and parametric cubic splines. Two of the image compression algorithms are innovative extensions of the Run Length …
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A Model Of Visual Recognition Implemented Using Neural Networks
… to approximate a conventional statistical data compression algorithm. The output of this pre-processing forms a feature vector that is categorised using an Adaptive Resonance Theory network capable of recognising arbitrary analog patterns. The implementation has been applied to the task of …
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Real-time video compression using DVQ and suffix trees
… is a wide and varied subject area. Video compression is an important but difficult problem in video processing. Several methods and standards exist which address this problem with varying degrees of success depending on the performance measures adopted. The present research work focuses on …
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An intelligent system for the classification and selection of novel and efficient lossless image compression algorithms
… increase in image size, the interest in image compression is increasing as well, to improve the storage size and transfer time. In this study, the researcher proposes two new lossless image compression algorithms. Both proposed algorithms focus on decreasing the image size by reducing the image …
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A VLSI array processor architecture for emulating resistive network filtering
… spatial filter that was part of a video image compression algorithm. The functionality of this algorithm, as well as the filter, was described in Cellular Neural/Nonlinear Network (CNN) notations and they will be used throughout this thesis in describing the filters and processing operations. …
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