Get values from image stack

[Dejan Vuletic]

Hi,
i'm starting to use ImageJ and I have some simple (I hope) problem:
Stack is created of series black and white images. So there is only two
pixel values: 0 and 255.
I wish to create some output file which contains pixel values for each
image in stack. Result which I like to have is something like this:
image 1: 12543 of value 0   ; 23421 of value 255
image 2: ....
etc...
Can anybody help me to solve this problem?

Thank You,
Dejan

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[Rasband, Wayne (NIH/NIMH) [E]]

On Jul 24, 2012, at 2:26 PM, Dejan Vuletic wrote:

> Hi,
> i'm starting to use ImageJ and I have some simple (I hope) problem:
> Stack is created of series black and white images. So there is only two
> pixel values: 0 and 255.
> I wish to create some output file which contains pixel values for each
> image in stack. Result which I like to have is something like this:
> image 1: 12543 of value 0   ; 23421 of value 255
> image 2: ....
> etc...
> Can anybody help me to solve this problem?

Here is a macro that does this:

   String.resetBuffer;
   for (i=1; i<=nSlices; i++) {
      setSlice(i);
      getRawStatistics(n, mean, min, max, std, histogram);
      String.append(i+" "+histogram[0]+" "+histogram[255]+"\n");
   }
   File.saveString(String.buffer, getDirectory("home")+"counts.txt");

Instructions for running a macro are at

   http://imagej.nih.gov/ij/developer/macro/macros.html

The functions used by this macro, such as setSlice() and String.append, are described at

   http://imagej.nih.gov/ij/developer/macro/functions.html

-wayne
   

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