Image Segmentation using Mean Shift explained

Could anyone please help me understand how Mean Shift segmentation actually works?

Here is a 8x8 matrix that I just made up

  103  103  103  103  103  103  106  104   
  103  147  147  153  147  156  153  104   
  107  153  153  153  153  153  153  107   
  103  153  147  96   98   153  153  104   
  107  156  153  97   96   147  153  107   
  103  153  153  147  156  153  153  101   
  103  156  153  147  147  153  153  104   
  103  103  107  104  103  106  103  107

Using the matrix above is it possible to explain how Mean Shift segmentation would separate the 3 different levels of numbers?