Open AccessComparison of fractal coding methods for medical image compression
Author(s) -
Bhavani Sridharan,
Thanushkodi Kepanna Gowder
Publication year - 2013
Publication title -
iet image processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.401
H-Index - 45
eISSN - 1751-9667
pISSN - 1751-9659
DOI - 10.1049/iet-ipr.2012.0041
Subject(s) - fractal compression , fractal transform , lossless compression , fractal , context adaptive binary arithmetic coding , image compression , data compression , fractal analysis , computer science , lossy compression , data compression ratio , artificial intelligence , algorithm , color cell compression , compression ratio , mathematics , computer vision , pattern recognition (psychology) , image processing , fractal dimension , image (mathematics) , mathematical analysis , physics , internal combustion engine , thermodynamics
In this study, the performance of fractal‐based coding algorithms such as standard fractal coding, quasi‐lossless fractal coding and improved quasi‐lossless fractal coding are evaluated by investigating their ability to compress magnetic resonance images (MRIs) based on compression ratio, peak signal‐to‐noise ratio and encoding time. For this purpose, MRI head scan test sets of 512 × 512 pixels have been used. A novel quasi‐lossless fractal coding scheme, which preserves important feature‐rich portions of the medical image, such as domain blocks and generates the remaining part of the image from it, has been proposed using fractal transformations. One of the biggest tasks in fractal image compression is reduction of encoding computation time. A machine learning‐based model is used for reducing the encoding time and also for improving the performance of the quasi‐lossless fractal coding scheme. The results show a better performance of improved quasi‐lossless fractal compression method. The quasi‐lossless and improved quasi‐lossless fractal coding algorithms are found to outperform standard fractal coding thereby proving the possibility of using fractal‐based image compression algorithms for medical image compression. The proposed algorithm allows significant reduction of encoding time and also improvement in the compression ratio.