Elongatedness

In image processing, elongatedness for a region is the ratio between the length and width of the minimum bounding rectangle of the region. It is considered a feature of the region. It can be evaluated as the ratio between the area of the region to its thickness squared:

elongatedness=lengthwidth=area(2d)2.

where the maximum thickness, d, of a holeless region is given by the number of times the region can be eroded before disappearing.[1]

## References

1. ↑ "Shape representation and description: Region-based shape representation and description". http://www.icaen.uiowa.edu/~dip/LECTURE/Shape3.html.

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