diff --git a/code/Noise.py b/code/Noise.py
index b6a5c1a..3906dba 100644
--- a/code/Noise.py
+++ b/code/Noise.py
@@ -52,14 +52,11 @@ class Noise:
 			uNoise.append( [] );
 			
 			for pixNoisy, pixRef in zip(lineNoisy, lineRef):
-				uNoise[pixRef.y].append( RGBPixel(
-						r   = 0 if pixNoisy.r-pixRef.r < 0 else pixNoisy.r-pixRef.r, # on tronque à 0 si négatif
-						g   = 0 if pixNoisy.g-pixRef.g < 0 else pixNoisy.g-pixRef.g, # on tronque à 0 si négatif
-						b   = 0 if pixNoisy.b-pixRef.b < 0 else pixNoisy.b-pixRef.b, # on tronque à 0 si négatif
-						x   = pixRef.x,
-						y   = pixRef.y,
-						bpp = pixRef.bpp,
-				) )
+				pix = RGBPixel(0,0,0,pixRef.x, pixRef.y, pixRef.bpp );
+				pix.r = pixNoisy.r-pixRef.r;
+				pix.g = pixNoisy.r-pixRef.g;
+				pix.b = pixNoisy.r-pixRef.b;
+				uNoise[pixRef.y].append( pix);
 
 
 		# on calcule la puissance du bruit
diff --git a/code/SaltAndPepper.bmp b/code/SaltAndPepper.bmp
new file mode 100644
index 0000000..559c7ab
Binary files /dev/null and b/code/SaltAndPepper.bmp differ
diff --git a/code/gtk/test2.py b/code/gtk/displayImage.py
similarity index 100%
rename from code/gtk/test2.py
rename to code/gtk/displayImage.py
diff --git a/code/test.bmp b/code/test.bmp
new file mode 100644
index 0000000..c070f2b
Binary files /dev/null and b/code/test.bmp differ