There are some paper that should be very relevant to your topic. Here are some of them:
Segmentation of Multispectral Remote-sensing Images based on Markov Random Fields (http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=615858)
Subpixel Mapping Using Markov Random Field With Multiple Spectral Constraints From Subpixel Shifted Remote Sensing Images (http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=6330982)