Skeletons (Zhang and others)

Detailed Description

Skeletons result from sequential iterations of thinnings that generate a medial axis of the input set. This medial axis are called skeleton.

Algorithms in this Addon don't make use of mathematical morphology operations but, most of the time, on empirical rules to iteratively removal of pixels based on their connectivity or neighborhood till idempotency.

See also

• [16] P. Soille, Morphological Image Analysis, 2003, Chap. 5
• Some related papers : [4], [18], [5], [10], [9], [6] or [8]
• For creating skeletons based on mathematical morphology operators, see skeleton(), skiz()

Collaboration diagram for Skeletons (Zhang and others):

Functions
template<class T >
RES_T	zhangSkeleton (const Image< T > &imIn, Image< T > &imOut)
	zhangSkeleton() - Zhang 2D skeleton
template<class T >
RES_T	zhangThinning (const Image< T > &imIn, Image< T > &imOut)
	zhangThinning() - Zhang 2D skeleton
template<typename T >
RES_T	imageThinning (const Image< T > &imIn, Image< T > &imOut, string method="Zhang")
	imageThinning()

Function Documentation

zhangSkeleton()

template<class T >

RES_T zhangSkeleton	(	const Image< T > &	imIn,
		Image< T > &	imOut
	)

zhangSkeleton() - Zhang 2D skeleton

Implementation corresponding to the algorithm described in [18], [5] and [9].

Parameters

[in]	imIn	: input image
[out]	imOut	: output image

Note

• 2D only

zhangThinning()

template<class T >

RES_T zhangThinning	(	const Image< T > &	imIn,
		Image< T > &	imOut
	)

zhangThinning() - Zhang 2D skeleton

Implementation corresponding to the algorithm described in [18], [5] and [9].

Parameters

[in]	imIn	: input image
[out]	imOut	: output image

Note

• 2D only

See also

zhangSkeleton() This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

imageThinning()

template<typename T >

RES_T imageThinning	(	const Image< T > &	imIn,
		Image< T > &	imOut,
		string	method = "Zhang"
	)

imageThinning()

Parameters

[in]	imIn	: binary input image
[out]	imOut	: output image
[in]	method	: algorithm to use. Zhang (default) - [18] DongLinHuang - [6]