MaximumFinder().getMaxima() always return 0 with Image1.52n

[LThomas (Laurent Thomas)]

Within Fiji, the following jython macro returns indeed a number of maxima until ImageJ 1.52k but with the last 1.52n it always returns 0, for any images.
I could not find ImageJ 1.52l and m to test them.

#@ ImagePlus imp
from ij.plugin.filter import MaximumFinder

Tolerance = 0.1
excludeOnEdge=False

print imp.getProcessor()
Polygon = MaximumFinder().getMaxima(imp.getProcessor(), Tolerance, excludeOnEdge)
print Polygon.npoints

Can someone confirm that they have a similar behaviour ?

[Wayne (Wayne Rasband)]

Can someone confirm that they have a similar behaviour ?

Please provide a test image.

[LThomas (Laurent Thomas)]

I will be back in the office on Tuesday. But I observed it with some sample images too (Lena and blobs for instance)

[Wayne (Wayne Rasband)]

Within Fiji, the following jython macro returns indeed a number of maxima until ImageJ 1.52k but with the last 1.52n it always returns 0, for any images.

This 1.52n regression is fixed in the latest ImageJ daily build (1.52o10). Here is JavaScript code that reproduces the problem:

  imp = IJ.openImage("http://wsr.imagej.net/images/Dot_Blot.jpg");
  ip = imp.getProcessor();
  ip.invert();
  prominence = 35;
  excludeOnEdge=false;
  polygon = new MaximumFinder().getMaxima(ip, prominence, excludeOnEdge);
  print("npoints="+polygon.npoints);

[LThomas (Laurent Thomas)]

Great, thank you Wayne for the quick fix!