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New Approaches for DCT-Based Image Compression Using Region of Interest Scheme |
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PP: 29-43 |
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Author(s) |
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U. S. Mohammed,
W. M. Abd-Elhafiez,
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Abstract |
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| In this paper, new techniques for the DCT image coding based in pixels classifications
are proposed. Two image coding approaches based on the object extraction are pre-
sented to study the effect of the object based image coding on the compression quality.
Moreover, modification of the traditional JPEG method based on Region-of-interest
coding is achieved. In the beginning, the image is subdivided into a block of pix-
els with block size of NxN. Firstly; the block must be classified as foreground block
or background block based on a pre-processing step. The foreground blocks will be
compressed via JPEG technique but with significant quantized coefficients and the DC
coefficient only from one block in the background is used to code it. The simulation re-
sult shows that the proposed technique provides competitive compression performance
relative to the most recent image compression techniques. |
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