In image processing, elongatedness for a region is the ratio between the length and width of the

minimum bounding rectangle In computational geometry, the minimum bounding rectangle (MBR), also known as bounding box (BBOX) or envelope, is an expression of the maximum extents of a two-dimensional object (e.g. point, line, polygon) or set of objects within its coordin ...

of the region. It is considered a

feature Feature may refer to: Computing * Feature (CAD), could be a hole, pocket, or notch * Feature (computer vision), could be an edge, corner or blob * Feature (software design) is an intentional distinguishing characteristic of a software item ...

of the region. It can be evaluated as the ratio between the area of the region to its thickness squared:

elongatedness = \frac = \frac

. where the maximum thickness,

d

, of a holeless region is given by the number of times the region can be

eroded Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location where it is deposited. Erosion is disti ...

before disappearing.Shape representation and description: Region-based shape representation and description
/ref>

References

{{Reflist Image processing