how to segment cartilage part of the knee?

I am going to work on knee MRI images.... I need to segment articular cartilage part of the knee using efficient voxel classification approach algorithm is given in the reference paper "efficient automatic cartilage segmentation" by Erik B.Dam

[Image Analyst]

http://matlab.wikia.com/wiki/FAQ#Can_you_program_up_the_algorithm_in_this_article_for_me_and_explain_it_to_me.3F

If you need specific help with a few lines of code after coding up the article, let us know.