how to calculate entropy of subband?

I have a code for 2d dual tree discrete wavelet transform please help me how to calculate entropy of subband of a image.

Answer 1

[Youssef Khmou]

hi,

did you try this :

 % Function entropy of grayscla image 
 I = imread('circuit.tif'); 
 J = entropy(I)

[maha lakshmi]

Thank you sir,It works.Thank you for your quick response.