كوثر حسن الخفاجي ( مدرس )
كلية التربية للبنات - الفيزياء
[email protected]
Study of Symmetry Process Behavior in Fractal Gray Image Compression by Traditional Method
بحث النوع:
علوم التخصص العام:
Eman A. Al-Hilo, اسم الناشر:
Kawther H. Al-Khafaji اسماء المساعدين:
Journal of Signal and Information Processing,) الجهة الناشرة:
2013, 4, 176-181 doi:10.4236/jsip.2013.43B032 Published Online August 2013 (  
2013 سنة النشر:


This paper studies the effect of symmetry process on the compression parameters of the fractal image compression tech-nique proposed by Jacquin. Two 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 at even symmetry 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 reduce the encoding time to 50% with preserving PSNR