Connected component analysis in image processing

1. What are connected components in image processing?
2. What is connected components used for?
3. What does cv2 connected components do?

What are connected components in image processing?

Connected components labeling scans an image and groups its pixels into components based on pixel connectivity, i.e. all pixels in a connected component share similar pixel intensity values and are in some way connected with each other.

What is connected components used for?

Connected Component Definition

A connected component or simply component of an undirected graph is a subgraph in which each pair of nodes is connected with each other via a path.

What does cv2 connected components do?

connectedComponentsWithStats . Connected component labeling (also known as connected component analysis, blob extraction, or region labeling) is an algorithmic application of graph theory used to determine the connectivity of “blob”-like regions in a binary image.