Check this instead of reimplementing, you may reuse existing one

http://www.shawnlankton.com/2007/11/mean-shift-segmentation-in-matlab/

Could You please explain step by step process, how to run it,,,,,,because when I am trying to do, it display error at very first step

>> compile_edison_wrapper

edison_wrapper_mex.cpp

c:\program files\matlab\r2012a\extern\include\matrix.h(294) : fatal error C1083: Cannot open include file: 'stddef.h': No such file or directory

C:\PROGRA~1\MATLAB\R2012A\BIN\MEX.PL: Error: Compile of 'edison_wrapper_mex.cpp' failed.

Error using mex (line 206)

Unable to complete successfully.

Error in compile_edison_wrapper (line 1)

mex -O edison_wrapper_mex.cpp ...

Step 1) You have to install visual studio c++ compiler

Step 2) type following command at matlab command prompt

>>mex -setup

select VC++ and press yes

Step 3) Now try to run compile_edison_wrapper

It should work now

till Its not working