hi;

Image segmentation, a process of pixel classification, aims to extract or segment
objects or regions from the background. It is a critical preprocessing step to the
success of image recognition (Pachowicz, 1994), image compression (Belloulata and
Konrad, 2002), image visualization (Hartmann and Galloway, 2000), and image
retrieval (Chen and Wang, 2002). Pal and Pal (1993) provided a review on various
segmentation techniques. It should be noted that there is no single standard approach
to segmentation. Many different types of scene parts can serve as the segments on
which descriptions are based, and there are many different ways in which one can
attempt to extract these parts from the image. Selection of an appropriate segmentation
technique depends on the type of images and applications