Blocking

Measurement of blocking artifacts in images

Measurement of blocking artifacts in images
  1. What is blocking artifact?
  2. What is blocking artifact in DCT based image compression scheme?

What is blocking artifact?

Block-based prediction and transform coding, including quantization of transform coefficients, can lead to visible and subjectively objectionable changes in intensity at coded block boundaries, referred to as blocking artifacts.

What is blocking artifact in DCT based image compression scheme?

block transform coding is the “blocking artifact.” These arti- facts appear as a regular pattern of visible block boundaries. This degradation is a direct result of the coarse quantization of. the coefficients and of the independent processing of the blocks.

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