NGTDM - MATLAB CODE

Neighborhood gray-tone difference matrix reflects a grayscale difference between pixels with certain grayscale and their neighboring pixels. Complexity parameter is a useful feature to distinguish between normal liver and fatty liver.   For the grayscale image I1 (x, y) with size H × H and a W ×W window was defined, where W = 2k +1   and the mean grayscale value matrix is calculated in the following equation:

The code for NGTDM can be found using The MATHWORKS link

or 

http://www.mathworks.in/matlabcentral/fileexchange/authors/my_fileexchange