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mmwatershed
Watershed detection.

Synopsis

y = mmwatershed ( f , Bc = NullStrel, LINEREG = "LINES" )

Input

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

Bc Structuring Element

( connectivity)

Default: NullStrel (3x3 elementary cross)
LINEREG String

Output image: 'LINES' or 'REGIONS'.

Default: "LINES" ('LINES')

Output

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

Description

mmwatershed creates the image y by detecting the domain of the catchment basins of f, according to the connectivity defined by Bc. 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 [Vin91].

Examples

f=mmreadgray('astablet.tif')
grad=mmgradm(f)
w1=mmwatershed(grad,mmsebox())
w2=mmwatershed(grad,mmsebox(),'REGIONS')
mmshow(grad)
mmshow(w1)
mmlblshow(w2)
grad w1
w2

Limitations

The structuring elements allowed are the elementary cross (4-connected) and the elementary square (8-connected).

See also

mmcwatershed Detection of watershed from markers.
mmfreedom Control automatic data type conversion.
mmsebox Create a box structuring element.
mmsecross Diamond structuring element and elementary 3x3 cross.
mmswatershed Detection of similarity-based watershed from markers.
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