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Research articles

ScienceAsia 39(2013): 416-422 |doi: 10.2306/scienceasia1513-1874.2013.39.416


On a high performance image compression technique


Walaa M. Abd-Elhafieza, Usama S. Mohammedb, Adem Kilicmanc,*

 
ABSTRACT:     We introduce an optimal approach to colour image compression using a new scan method. We propose efficient methods to increase the compression ratio for colour images by dividing the colour image into non-overlapping blocks and applying a different compression ratio for these blocks depending on the classification of blocks into edge and non-edge blocks. In an edge block (a region that contains important information) the compression ratio is reduced to prevent loss of information, while in a non-edge block (a smooth region which does not have important information), a high compression ratio is used. The new proposed scan is used instead of the zigzag scan. A particular implementation of this approach was tested, and its performance was quantified using the peak signal-to-noise ratio. Numerical results indicated general improvements in visual quality for colour image coding.

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a Mathematical and Computer Science Dept., Faculty of Science, Sohag University, 82524, Sohag, Egypt
b Department of Electrical Engineering, Assiut University, 71516, Assiut, Egypt
c University Putra Malaysia, Department of Mathematics, 43400 UPM, Serdang, Selangor, Malaysia

* Corresponding author, E-mail: akilicman@putra.upm.edu.my

Received 12 Nov 2012, Accepted 6 Mar 2013