diff --git a/kindlecomicconverter/rainbow_artifacts_eraser.py b/kindlecomicconverter/rainbow_artifacts_eraser.py
index 29ed773..ee6d705 100644
--- a/kindlecomicconverter/rainbow_artifacts_eraser.py
+++ b/kindlecomicconverter/rainbow_artifacts_eraser.py
@@ -14,8 +14,8 @@ def fourier_transform_image(img):
     
     return fft_result
      
-def attenuate_diagonal_frequencies(fft_spectrum, freq_threshold=0.3, target_angle=135, 
-                                     angle_tolerance=10, attenuation_factor=0.25):
+def attenuate_diagonal_frequencies(fft_spectrum, freq_threshold=0.30, target_angle=135, 
+                                     angle_tolerance=10, attenuation_factor=0.15):
     """
     Attenuates specific frequencies in the Fourier domain (optimized version for rfft2).
     
@@ -64,15 +64,11 @@ def attenuate_diagonal_frequencies(fft_spectrum, freq_threshold=0.3, target_angl
     # Calculation of complementary angle
     target_angle_2 = (target_angle + 180) % 360
     
-    # Calulation of perpendicular angles (for better final rendering)
-    target_angle_3 = (target_angle + 90) % 360
-    target_angle_4 = (target_angle_3 + 180) % 360
-    
     # Create angular conditions in a vectorized way
     angle_condition = np.zeros_like(angles_deg, dtype=bool)
     
     # Process both angles simultaneously
-    for angle in [target_angle, target_angle_2, target_angle_3, target_angle_4]:
+    for angle in [target_angle, target_angle_2]:
         min_angle = (angle - angle_tolerance) % 360
         max_angle = (angle + angle_tolerance) % 360