dummy question about "median"

Posted by on Dec 14, 2006; 9:46am
URL: http://imagej.273.s1.nabble.com/dummy-question-about-median-tp3700824.html

Hi all,
I've a little doubt about median of an rgb image.
Could anybody explain me why in next fragment of code "median1" is different from "median2", while "stnd.Dev1" and "mean1" are respective the same of "stnd.Dev2" and "mean2"?

Suppose imp in an ImagePlus Object is an RGB image.


--------------
System.out.println(
   "Stnd.Dev1:" + imp.getStatistics().stdDev+", " +
   "Media1:" + imp.getStatistics().mean + ", " +
   "Median1:" + imp.getStatistics().median);
       
ImageStatistics stats = ImageStatistics.getStatistics(
   imp.getProcessor(),
   Measurements.MEAN+Measurements.MEDIAN+Measurements.STD_DEV,
   null);
       
System.out.println(
   "Stnd.Dev2:" + stats.stdDev + ", " +
   "Media2:" + stats.mean + ", " +
   "Median2:" + stats.median);
----------------------

Thanks All,
by

  Nicola B.





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