Study of Symmetry Process Behavior in Fractal Gray Image Compression by Traditional Method
Study of Symmetry Process Behavior in Fractal Gray Image Compression by Traditional Method作者机构：College of Education for Girls Physics Departments Kufa University Najaf Iraq.
出 版 物：《Journal of Signal and Information Processing》 (信号与信息处理（英文）)
年 卷 期：2013年第4卷第3期
页 面：176-181页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Image Compression Zero-Mean Fractal Image Compression Symmetry process
摘 要：This paperstudiesthe effect of symmetry process on the compression parameters of thefractal image compression technique proposed by *** kinds of tests have been conducted. The first all kind of the symmetry operations [0-7] were taken;while the second tests were concentrated on studying the effect of the following parameters Block Size, Step Size, Domain Size on the probability distribution of symmetry operation. The results show that the higher value of PSNR and the lower value of ET occur atevensymmetry operation only, but compression ratio is not affected with symmetry process. Also the occurrence probability of even symmetry is more than odd symmetry for all compression parameters. This behaviour can be utilized to reducethe encoding time to 50% with preserving PSNR.
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