Master's Thesis from the year 2014 in the subject Computer Science - Software, , course: Image Processing, language: English, abstract: In this thesis various methods for lossless compression of source image data are analyzed and discussed. The main focus in this work is lossless compression algorithms based on context modeling using tree structure.We are going to compare CALIC, GCT-I algorithms to theJPEG2000 standard algorithm which will be considered the reference of comparison.This work includes research on how to modify CALIC algorithm in continuous-tone mode by truncating tails of the error histogram which may lead to improve CALIC compression performance.Also, we are going to propose a modification to CALIC in binarymode by eliminating error feedback mechanism. As when any pixel to be encoded has a different grey level than any of the neighboring pixels, CALIC triggers an escape sequence that switches the algorithm from binary mode to continuous-tone mode. Which means in this case the pixel will be treated as if it was in continuous-tone region. This minor modification should improve CALIC performance in binary images.Finally, we are going to discuss the GCT-I on medical images and compare results to the JPEG2000 standard.
Comparison of Lossless Image Compression Techniques based on Context Modeling
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Master's Thesis from the year 2014 in the subject Computer Science - Software, , course: Image Processing, language: English, abstract: In this thesis various methods for lossless compression of source image data are analyzed and discussed. The main focus in this work is lossless compression algorithms based on context modeling using tree structure.We are going to compare CALIC, GCT-I algorithms to theJPEG2000 standard algorithm which will be considered the reference of comparison.This work includes research on how to modify CALIC algorithm in continuous-tone mode by truncating tails of the error histogram which may lead to improve CALIC compression performance.Also, we are going to propose a modification to CALIC in binarymode by eliminating error feedback mechanism. As when any pixel to be encoded has a different grey level than any of the neighboring pixels, CALIC triggers an escape sequence that switches the algorithm from binary mode to continuous-tone mode. Which means in this case the pixel will be treated as if it was in continuous-tone region. This minor modification should improve CALIC performance in binary images.Finally, we are going to discuss the GCT-I on medical images and compare results to the JPEG2000 standard.
This book is designed for the researchers and students, who want to do in-depth study and research of lossy, lossless and hybrid digital image compression techniques in very lucid manner. This book...
Signal Recovery Techniques for Image and Video Compression and Transmission establishes a bridge between the fields of signal recovery and image and video compression. ...
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