ImageDev

Region Growing

Algorithms that segment an image by propagating some seeds.
This group contains segmentation algorithms based on seed propagation.

Introduction to Watershed

The principle of the watershed algorithm is called immersion, and it is based on a simulation of the rise of water from a set of markers. The level $p$ is flooded at a uniform speed from the fronts coming from level $p-1$ and the local minima appear at level $p$. A point of the watershed appears when two distinct fronts join.
Figure 1: The watershed principle
Figure 1: The watershed principle
Figure 2: Example of how the result depends on the choice of markers
Figure 2: Example of how the result depends on the choice of markers

References