diff --git a/datasets/raise/split_and_compare_prnus_of_subgroups.py b/datasets/raise/split_and_compare_prnus_of_subgroups.py
index 65b7c70..91c5527 100755
--- a/datasets/raise/split_and_compare_prnus_of_subgroups.py
+++ b/datasets/raise/split_and_compare_prnus_of_subgroups.py
@@ -37,9 +37,15 @@ for subgroupIndex in tqdm(range(NUMBER_OF_SUBGROUPS), 'Subgroup'):
         subgroupIterativeMean.add(imagePrnuEstimateNpArray)
         subgroupPrnuEstimateNpArray += [subgroupIterativeMean.mean]
 
-    plt.imsave(f'prnu_subgroup_{subgroupIndex}.png', subgroupPrnuEstimateNpArray[-1])
     subgroupsPrnuEstimatesNpArray += [subgroupPrnuEstimateNpArray]
 
+mostImagesSubgroupPrnuEstimatesNpArray = [subgroupPrnuEstimatesNpArray[-1] for subgroupPrnuEstimatesNpArray in subgroupsPrnuEstimateNpArray]
+minimum = np.min(mostImagesSubgroupPrnuEstimatesNpArray)
+maximum = np.max(mostImagesSubgroupPrnuEstimatesNpArray)
+
+for subgroupIndex in range(NUMBER_OF_SUBGROUPS):
+    plt.imsave(f'prnu_subgroup_{subgroupIndex}.png', (subgroupsPrnuEstimateNpArray[subgroupIndex][-1] - minimum) / (maximum - minimum))
+
 rmss = []
 for numberOfImagesIndex in range(len(numberOfImagesThresholds)):
     rms = rmsDiffNumpy(subgroupsPrnuEstimatesNpArray[0][numberOfImagesIndex], subgroupsPrnuEstimatesNpArray[1][numberOfImagesIndex])