Image Segmentation
Segmentation is the process that divides an image into its constituent parts or objects.
Segmentation is an essential step before description and recognition / classification.
Two major approaches to image segmentation are based on detection of.
- Discontinuity: abrupt changes in gray level (corresponding to edges) are detected.
- Similarity: homogeneous parts are detected, based on gray level thresholding, region growing, and region splitting / merging.