diff --git a/datasets/noise_free_test_images/estimate_prnu.py b/datasets/noise_free_test_images/estimate_prnu.py
index b378696..932f1df 100644
--- a/datasets/noise_free_test_images/estimate_prnu.py
+++ b/datasets/noise_free_test_images/estimate_prnu.py
@@ -69,13 +69,13 @@ for splitNXNIndex, splitNXN in enumerate(SPLIT_N_X_N_S):
                     axis[0].set_title('First image without noise')
                     axis[0].imshow(imageWithoutPrnuNpArrayTile)
 
-                    axis[1].set_title('Actual Gaussian noised (G.n.) PRNU')
+                    axis[1].set_title('Actual Gaussian noised PRNU')
                     axis[1].imshow(prnuNpArray)
 
-                    axis[2].set_title('F. image with G.n.')
+                    axis[2].set_title('F. i. with G. n.')
                     axis[2].imshow(imageWithoutPrnuNpArray + imageNoise)
 
-                    axis[3].set_title('F. image with G.n. and PRNU')
+                    axis[3].set_title('F. i. with G. n. and PRNU')
                     axis[3].imshow(imageWithoutPrnuNpArray + prnuNpArray + imageNoise)
                 isFirstImage = False