How to use Gray Level Co-occurence Matrix (GLCM) for Extraction of features values from color texture?

hi. I m working on project " Object recognition based on robust features extraction from color texture measurements using back -propagation classifier". so one portion of this project is the extraction of features values from color texture using GLCM (features like mean value standard deviation contrast homogenety dissimilarity and energy)in which i m feeling difficulty how to write code for it or how to start its code. plz give me some hints or code so that i can continue my project.

Thanks