How to obtain entropy , energy of 3d volumetric image on GLCM features ..?

Hello, I am using GLCM for the texture analysis of 3d volumetric image. But i do not solve this . Error as follow:

Error using graycomatrix

Expected input number 1, I, to be two-dimensional.

Error in graycomatrix>ParseInputs (line 260)

validateattributes(I,{'logical','numeric'},{'2d','real','nonsparse'}, ...

Error in graycomatrix (line 167)

[I, Offset, NL, GL, makeSymmetric] = ParseInputs(varargin{:});

Answer 1

[Anusha]

Hi,

I understand that you are trying to find the GLCM features of a 3-D image (Image3D) and want to calculate the entropy and energy of the obtained GLCM features.

Currently graycomatrix() supports only 2-D intensity images as input. You can convert the 3-D RGB image to an intensity image and obtain the GLCM features as shown below:

% Convert the 3-D RGB image to grayscale  
I = im2gray(Image3D) 

% Obtain the GLCM features 
glcm = graycomatrix(I) 

% Calculate energy of the GLCM features  
Energy_glcm = graycoprops(glcm,{'energy'}) 

Please refer to the following documentation for more details regarding “graycoprops“ function : Properties of gray-level co-occurrence matrix - MATLAB graycoprops (mathworks.com)

Thanks,

Anusha