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・ Thinley Dorji (archer)
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Thinning (morphology)
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Thinning (morphology) : ウィキペディア英語版
Thinning (morphology)

Thinning is the transformation of a digital image into a simplified, but topologically equivalent image. It is a type of topological skeleton, but computed using mathematical morphology operators.
== Example ==

Let E=Z^2, and consider the eight composite structuring elements, composed by:
:C_1=\ and D_1=\,
:C_2=\ and D_2=\
and the three rotations of each by 90^o, 180^o, and 270^o. The corresponding composite structuring elements are denoted B_1,\ldots,B_8.
For any ''i'' between 1 and 8, and any binary image ''X'', define
::X\otimes B_i=X\setminus (X\odot B_i),
where \setminus denotes the set-theoretical difference and \odot denotes the hit-or-miss transform.
The thinning of an image ''A'' is obtained by cyclically iterating until convergence:
:A\otimes B_1\otimes B_2\otimes\ldots\otimes B_8\otimes B_1\otimes B_2\otimes\ldots.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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