mmhbasin - Remove basins with contrast smaller than h.

Synopsis: y = mmhbasin( f, h, Bc )

Input: f: Gray-scale (uint8 or uint16) image.; h: Contrast parameter. Default: 1.; Bc: Structuring element. Structuring element (connectivity). Default: Elementary cross (mmsecross).

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

Description: mmhbasin sup-reconstructs the gray-scale image f from the marker created by the addition of the positive integer value h to f, using the connectivity Bc. This operator removes connected basins with contrast smaller than h. This function is very userful for simplifying the basins of the image.

Examples

Numerical example:

a = uint8([...
    10    3    6   18   16   15   10;...
    10    9    6   18    6    5   10;...
    10    9    9   15    4    9   10;...
    10   10   10   10   10   10   10]);
b = mmhbasin(a,1,mmsebox)

b =
    10     4     6    18    16    15    10
    10     9     6    18     6     5    10
    10     9     9    15     5     9    10
    10    10    10    10    10    10    10

Signal example:

f = mmreadgray('r4x2_256.tif');
s=f(10,1:end/2);
t = mmhbasin(s,20);
plot(s);
plot([s',t']);

(s)

(t)

Image example:

f = mmreadgray('r4x2_256.tif');
mmshow(f);
fb = mmhbasin(f,70);
mmshow(fb);
mmshow(mmregmin(fb));

(f)

(fb)

(mmregmin(fb))

Equation

Algorithm

function y=mmhbasin_equ( f, h, bc)
 g = mmaddm(f,h);
 y = mmsuprec(g,f,bc);

See Also: mmareaclose - Area closing; mmfreedom - Control automatic data type conversion.; mmhdome - Remove peaks with contrast smaller than h.; mmsebox - Create a box structuring element.; mmsecross - Cross structuring element.; mmvdome - Remove domes with volume smaller than v.

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