GLCM Entropy Feature Calculation

This is my Entropy calculation from glcm matrix

but the result is

the entropy formula i used here is correct ?

[ARCHANA KUMARI]

What is your project topic?

Answer 1

[Image Analyst]

I believe you can use the built-in graycoprops() to get that value.

[Vincy Y]

Thank you sir/Madam, but i have matlab R2009b, the graycoprobs() only return 4 features(energy,correlation contrast, homogeneity. So i need a code using for loop to calculate entropy without using built-in functions.

[Image Analyst]

Use entropyfilt() or entropy().

[REHAN AHMAD]

how to calculate GLCM feature correlationmatlab

[ARCHANA KUMARI]

What is your project topic?

[Image Analyst]

Since you say you must have it without using built-in functions, then it must be your homework and I'm sure your professor would not allow anyone turning in my/our code as their own. Anyway, since it's been 4 years, I'm sure it's already been done and turned in. For others who want a demo on how to compute the gray level cooccurrence matrix using the built-in function, see attached m-file.

Answer 2

[Luis Frauca Trasobares]

If you have your GLCM matrix correct ( you can use graycomatrix), next step is to normalized that matrix, and after that you can do your calculus or formula-code that you showed here.

Also take care of the 0 values because if you put them in the log it will be problematic (add eps to the log to solve this or control your grey levels without zero level, for example).