Re: histogram x-axis

Posted by Wayne Rasband on Feb 28, 2008; 5:23pm
URL: http://imagej.273.s1.nabble.com/histogram-x-axis-tp3697053p3697054.html

> Dear imageJ experts,
>
> I'd like to compare histograms from lots of images. By default, the
> X-axis of the histogram ranges from the minimal up to the maximal
> intensity recorded from each image, e.g. image1 9-250, image2
> 200-7500. So it's quite difficult to visually compare two histograms.
> Can I manually set the limits to the min (0) and max (7500) for all
> images?. Any help is appreciated, thank you!

Hold the alt key down when running the Histogram command and you will
get a dialog box that allows you to specify the x-axis range. Or
install this macro, which generates a 0-7500 histogram when you press
'h'.

   macro "Histogram (0-7500) [h]" {
      setKeyDown("alt");
      run("Histogram", "bins=256 x_min=0 x_max=7500 y_max=Auto");
   }

Add this macro to ImageJ/macros/StartupMacros.txt to have it
automatically installed when ImageJ starts.

-wayne