Watershed Algorithm

The Watershed Algorithm is a method used in image processing to separate different objects within an image, similar to how watersheds divide land areas based on drainage. Imagine a landscape where rainwater collects in basins; the watershed lines represent the boundaries between these basins. In image analysis, this algorithm treats pixel intensity like elevation where high areas (bright pixels) act as peaks, and low areas (dark pixels) represent valleys. By “filling” the valleys from the lowest points upwards, the algorithm identifies distinct regions, effectively segmenting objects in the image for further analysis.