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Homework Help: How to create a histogram of a nifti file

  1. Dec 10, 2011 #1
    Hi,
    I'm trying to create a histogram of a .nii file but it's now working.
    1. loading the nifti file:
    >> Try2=load_nifti('DM.nii');
    2. hist(Try2);
    that generarates a histogram, where most of the values are concentrated between -150 and 200.(3 bars,the middle one is between -50 and 100).
    3. I then use a function that sets all pixels in the range to 1 (white)
    and all pixels that are out of range to 0 (black).
    range=(inputFileName >= I_min & inputFileName <= i_max);
    inputFileName(range)=1;
    inputFileName(~range)=0;

    4. Then I save the file and open it with ITKSnap
    save_nifti(inputFileName,outputFileName,1);
    but when I open it, it's almost all white.

    Not sure what I'm doing wrong, please help.
    Thanks in advance!
     
  2. jcsd
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