Thursday, January 5, 2012

The reason for using 8x8 as the block size in image processing

The DCT usually use 8x8 as the block size to be applied to images. This is a trade-off between computational complexity, compression speed and quality.

A lot of research work show that after 15 or 20 pixels, the relationship among them begins to reduce; that is to say, a group of similar pixels usually lasts for 15 to 20, after that, the amplitude would change.

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