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mmswatershed
Detection of similarity-based watershed from markers.

Synopsis

function y = mmswatershed ( f , g , B , LINEREG )

Input

f	Image Gray-scale (uint8 or uint16) image
g	Image Gray-scale (uint8 or uint16) or binary image Marker image. If binary, each connected component is an object marker. If gray, it is assumed it is a labeled image.
B	Structuring Element Default: `3x3 elementary cross` (watershed connectivity)
LINEREG	String Default: `'LINES'` Output image: 'LINES' or 'REGIONS'.

Output

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

Description

mmswatershed creates the image y by detecting the domain of the catchment basins of f indicated by g, according with the connectivity defined by B. This watershed is a modified version where each basin is defined by a similarity criterion between pixels. The original watershed is normally applied to the gradient of the image. In this case, the gradient is taken internally. According to the flag LINEREG y will be a labeled image of the catchment basins domain or just a binary image that presents the watershed lines. The implementation of this function is based on [LF00].

Examples

Numerical

f = uint8([...

    0,  0,  0,  0,  0,  0,  0;...

    0,  1,  0,  0,  0,  1,  0;...

    0,  1,  0,  0,  0,  1,  0;...

    0,  1,  1,  1,  1,  1,  0;...

    0,  1,  0,  0,  0,  0,  0;...

    0,  0,  0,  0,  0,  0,  0]);

m = uint8([...

    0,  0,  0,  0,  0,  0,  0;...

    0,  1,  0,  0,  0,  0,  0;...

    0,  0,  0,  0,  0,  0,  0;...

    0,  0,  0,  0,  0,  0,  0;...

    0,  0,  0,  0,  0,  0,  0;...

    0,  0,  0,  2,  0,  0,  0]);

mmswatershed(f,m,mmsecross,'REGIONS')

ans =
      2      2      2      2      2      2      2
      2      1      2      2      2      1      2
      2      1      2      2      2      1      2
      2      1      1      1      1      1      2
      2      1      2      2      2      2      2
      2      2      2      2      2      2      2

mmcwatershed	Detection of watershed from markers.
mmwatershed	Watershed detection.
mmfreedom	Control automatic data type conversion.
mmsebox	Create a box structuring element.
mmsecross	Diamond structuring element and elementary 3x3 cross.

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mmswatershed Detection of similarity-based watershed from markers.