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.
Research Member
Research Department
Research Year
2013
Research Journal
Science Asia
Research Publisher
NULL
Research Vol
39
Research Rank
1
Research_Pages
416-422
Research Website
https://pdfs.semanticscholar.org/3e61/a7125751ebd6e4a5f0a5e6b5a6caaed62626.pdf
Research Abstract