Energy

As DCT Does Compaction of Energy, Can We Say IDCT Does Energy Spreading?

As DCT Does Compaction of Energy, Can We Say IDCT Does Energy Spreading?
  1. What is energy compaction?
  2. What is energy compaction of Image Transform?

What is energy compaction?

By energy compaction, we refer to the capability of a transform to redistribute the signal energy into a small number of transform coefficients.

What is energy compaction of Image Transform?

If A is the transformation matrix that is unitary, it can be proved that the energy in x and Ax are same. Energy conservation property. Energy compaction means that the energy of Ax=y is more concentrated in some elements compared to the distribution of energy in x. DCT is said to have energy compaction property.

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