Segmentation

Another way of extracting and representing information from an image is to group pixels together into regions of similarity. This process is commonly called segmentation. In

2D

-- we would group pixels together according to the rate of change of their intensity over a region.

3D

-- we group together pixels according to the rate of change of depth in the image, corresponding to pixels lying on the same surface such as a plane, cylinder, sphere etc.

There are two main approaches to segmentation.

 

• Region Splitting
  
• Region Growing
  
• Statistical Region Description
  
• Invariant Measures