local_max ( Image : LocalMaxima : : )

Detect all local maxima in an image.

local_max extracts all points in an image having a gray value larger than the gray value of all its neighbors. The neighborhood used can be set by set_system(::'neighbourhood',<4/8>).


Parameters

Image (input_object)
image(-array) -> object : byte / int1 / int2 / int4 / real
Image to be processed.

LocalMaxima (output_object)
region(-array) -> object
Extracted local maxima as regions.
Number of elements: LocalMaxima == Image


Example
#include  
#include  "HCPP.H"

int main (int argc, char *argv[])
{
  if (argc != 2)
  {
    cout << "Usage : " << argv[0] << " " << endl;
    return (-1);
  }

  HImage   image (argv[1]);
  HWindow  win;

  image.Display (win);

  HImage       cres = image.CornerResponse (5, 0.04);
  HRegionArray maxi = cres.LocalMax ();

  win.SetColored (12);
  maxi.Display (win);
  win.Click ();

  return (0);
}

Possible Predecessors

gauss__, smooth__


Possible Successors

fetch_coord, connection


Alternatives

grey_skeleton__, nonmax_suppression_amp, plateaus, plateaus_center


See also

monotony, topographic_sketch, corner_response__, laws_byte



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