Peak Signal to Noise Ratio

The ratio between the maximum possible power to the power of

corrupting noise is know as Peak Signal to Noise Ratio. It affects

the fidelity of its representation .It can be also said that it is the

logarithmic function of peak value of

image and mean square error.

Entropy provides information for the homogeneity of the existing distribution.

E=sum (Pi . log(Pi)) where pi is probability for the i state (pixel).

The entropy (E) takes low values in the edge region and high values in the flat regions.

Thnx

entropy take high value at edge region and love value at flat region.