diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..a013e51
Binary files /dev/null and b/.DS_Store differ
diff --git a/main.cpp b/main.cpp
index 1021036..c530213 100644
--- a/main.cpp
+++ b/main.cpp
@@ -74,6 +74,12 @@ int main()
     //                        Part 2: Average                                    //
     ///////////////////////////////////////////////////////////////////////////////
 
+    // Calculate the upper envelope
+	// ??
+	// Calculate the lower envelope
+	// ??
+    
+	// Calculate the Average
     CImg<unsigned char> imgMoyenne = (imgMax+imgMin)/2;
     CImgDisplay dispMoyenne(imgMoyenne,"Image Moyenne");