TITLE:
Study of Symmetry Process Behavior in Fractal Gray Image Compression by Traditional Method
AUTHORS:
Eman A. Al-Hilo, Kawther H. Al-Khafaji
KEYWORDS:
Image Compression; Zero-Mean; Fractal Image Compression; Symmetry process
JOURNAL NAME:
Journal of Signal and Information Processing,
Vol.4 No.3B,
October
17,
2013
ABSTRACT:
This paperstudiesthe effect of symmetry process on the compression
parameters of thefractal
image compression technique 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 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.