Re: StackStatisticks histograms precision

Posted by Rasband, Wayne (NIH/NIMH) [E] on Jul 14, 2015; 1:28pm
URL: http://imagej.273.s1.nabble.com/StackStatisticks-histograms-precision-tp5013544p5013552.html

On Jul 14, 2015, at 5:03 AM, damien.schnebelen <[hidden email]> wrote:
>
> Dear all,
> I have calculated stacks histograms using the StackStatisticks function and
> I have noticed that the maximum counts value is truncated to 2^31 -1.
> Is it possible to get a long precision histogram?


The ImageStatistics.getHistogram() method returns a long precision histogram. The following is a JavaScript example.

-wayne

  imp = IJ.createImage("Untitled", "8-bit black", 1024, 1024, 2050);
  stats = new StackStatistics(imp);
  longHistogram = stats.getHistogram();
  print("pixel count: "+stats.longPixelCount);
  print("stats.histogram[0]: "+stats.histogram[0]);
  print("longHistogram[0]: "+longHistogram[0]);
  print("2^31-1: "+ (Math.pow(2,31)-1));

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