Erosion

Include <mln/morpho/erosion.hpp>

Image{I} image_concrete_t<I> erosion(I image, StructuringElement se)

Image{I} image_concrete_t<I> erosion(I image, StructuringElement se, BorderManager bm)

void erosion(Image image, StructuringElement se, OutputImage out)

void erosion(Image image, StructuringElement se, BorderManager bm, OutputImage out)

Erosion by a structuring element.

Given a structuring element 𝐵, the erosion \(\varepsilon(f)\) of the input image 𝑓 is defined as:

\[\varepsilon(f)(x) = \bigwedge \{ \, f(y), y \in B_x \, \}\]

An optional border management may be used to manage border side-effects. Only fill and user are currently supported.
If the optional output image is provided, it must be wide enough to store the result (the function does not perform any resizing).

Parameters:

ima – Input image 𝑓
se – Structuring element 𝐵
bm (optional) – Border manager
output (optional) – Output image

Returns:

(1,2) An image whose type is deduced from the input image
(3,4) Nothing (the output image is passed as an argument)

Exception:

N/A

Image{I} image_concrete_t<I> erosion(I image, StructuringElement se)
void erosion(Image image, StructuringElement se, OutputImage out): Parallel version of the erosion algorithm.

Notes

Complexity

Example 1 : Erosion by a square on a gray-level image

#include <mln/morpho/erosion.hpp>
#include <mln/core/wind2d.hpp>

// Define a square SE of size 21x21
auto input = ...;
auto rect = mln::se::rect2d(21,21);
auto output = mln::morpho::erosion(input, rect);