[mmvmax] [Up] [mmhmin] Connected Operators

mmhmax
Remove peaks with contrast less than h.

Synopsis

y = mmhmax ( f , h = 1, Bc = NullStrel )

Input

f Image Gray-scale (uint8 or uint16) image

h Double

Contrast parameter.

Default: 1 (1)
Bc Structuring Element

Structuring element ( connectivity).

Default: NullStrel (3x3 elementary cross)

Output

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

Description

mmhmax inf-reconstructs the gray-scale image f from the marker created by the subtraction of the positive integer value h from f, using connectivity Bc. This operator removes connected peaks with contrast less than h.

Examples

Numerical example:
a = uint8([
    [4,   3,   6,  1,  3,  5,  2],
    [2,   9,   6,  1,  6,  7,  3],
    [8,   9,   3,  2,  4,  9,  4],
    [3,   1,   2,  1,  2,  4,  2]])
print mmhmax(a,2,mmsebox())
[[4 3 6 1 3 5 2]
 [2 7 6 1 6 7 3]
 [7 7 3 2 4 7 4]
 [3 1 2 1 2 4 2]]
Signal example:
Image example:
f = mmreadgray('r4x2_256.tif')
mmshow(f)
fb = mmhmax(f,50)
mmshow(fb)
mmshow(mmregmax(fb))
f fb
mmregmax(fb)

Equation

See also

mmsecross Diamond structuring element and elementary 3x3 cross.
mmsebox Create a box structuring element.
mmfreedom Control automatic data type conversion.
mmhmin Remove basins with contrast less than h.
mmvmin Remove basins with volume less than v.
mmareaopen Area opening
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