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mmRegmin
Regional Minimum (with generalized dynamics).

Synopsis

Image mmRegmin ( const Image& f , const Strel& Bc = NullStrel, const String& option = "binary" );

Input

f Image [ Gray-scale (uint8 or uint16) image ]

Bc Structuring Element

(connectivity).

Default: NullStrel (3x3 elementary cross)
option String

Choose one of: BINARY: output a binary image; VALUE: output a grayscale image with points at the regional minimum with the pixel values of the input image; DYNAMICS: output a grayscale image with points at the regional minimum with its dynamics; AREA-DYN: int32 image with the area-dynamics; VOLUME-DYN: int32 image with the volume-dynamics.

Default: "binary"

Output

y Image [ Gray-scale (uint8 or uint16) or binary image ]

Description

mmRegmin creates a binary image f by computing the regional minima of f, according to the connectivity defined by the structuring element Bc. A regional minimum is a flat zone not surrounded by flat zones of lower gray values. A flat zone is a maximal connected component of a gray-scale image with same pixel values. There are three output options: binary image; valued image; and generalized dynamics. The dynamics of a regional minima is the minimum height a pixel has to climb in a walk to reach another regional minima with a higher dynamics. The area-dyn is the minimum area a catchment basin has to raise to reach another regional minima with higher area-dynamics. The volume-dyn is the minimum volume a catchment basin has to raise to reach another regional minima with a higher volume dynamics.

The dynamics concept was first introduced in [GR92] and it is the basic notion for the hierarchical or multiscale watershed transform.

Equation

See also

mmRegmax Regional Maximum.
mmSebox Create a box structuring element.
mmSecross Diamond structuring element and elementary 3x3 cross.
mmHmin Remove basins with contrast less than h.
mmAreaclose Area closing
mmVmin Remove basins with volume less than v.
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