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mmopenth - Opening Top Hat.

Synopsis
y = mmopenth( f, b )
Input
f: Gray-scale (uint8 or uint16) or binary image (logical uint8).
b: Structuring element. structuring element Default: Elementary cross (mmsecross).
Output
y: Gray-scale (uint8 or uint16) or binary image (logical uint8). (same type of f).
Description
mmopenth creates the image y by subtracting the morphological opening of f by the structuring element b of f itself.
Examples 
a = mmreadgray('keyb.tif');
mmshow(a);
b = mmopenth(a,mmsebox(3));
mmshow(b);
image
(a)
image
(b)
Equation

equation

Algorithm 
function y=mmopenth_equ( f, b)
  y = mmsubm(f,mmopen(f,b);
See Also
mmcloseth - Closing Top Hat.
mmfreedom - Control automatic data type conversion.
mmgradm - Morphological gradient.
mmopen - Morphological opening.
mmopenrecth - Open-by-Reconstruction Top-Hat.
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