mmswatershed - Detection of similarity-based watershed from markers.

Synopsis

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

Input

f: Gray-scale (uint8 or uint16) image.

g: Gray-scale (uint8 or uint16) or binary image (logical uint8). Marker image. If binary, each connected component is an object marker. If gray, it is assumed it is a labeled image.

B: Structuring element. (watershed connectivity) Default: Elementary cross (mmsecross).

LINEREG: String. 'LINES' or ' REGIONS'. Default: "LINES".

Output

y: Gray-scale (uint8 or uint16) or binary image (logical uint8).

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 criteria 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

See Also

mmcwatershed - Detection of watershed from markers.

mmfreedom - Control automatic data type conversion.

mmsebox - Create a box structuring element.

mmsecross - Cross structuring element.

mmwatershed - Watershed detection.

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