plot histogram after averaging images

Question

I have the following code to average a set of images (say 100 images) and to plot the histogram of the averaged image (one image). I am not getting the histogram with this code. Could you please help me in this code.

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# reading multiple images
 S01=[i for i in glob.glob("C:/Users/experiment 1/S01/*.tif")]
  #  Averaging images 
   s=np.array([np.array(Image.open(fname)) for fname in
   S01])   
   s_avg=np.array(np.mean(s,axis=(0)),dtype=np.uint16)   
   s_out=Image.fromarray(s_avg)
   #plot histogram
   plt.hist(s_out,bins=auto)
   plt.show()

Answer 1

No need to convert s_avg to an Image, you can compute the histogram of the array using .ravel()

fnames = [i for i in glob.glob("C:/Users/experiment 1/S01/*.tif")]
s=np.array([np.array(Image.open(fname)) for fname in fnames])

s_avg=np.mean(s,axis=(0)) 

#plot histogram
plt.hist(s_avg.ravel(),bins=100)
plt.show()