diff --git a/Basics/5_Must_Know_OpenCV_Functions.py b/Basics/5_Must_Know_OpenCV_Functions.py
index e22c287..0e10e22 100644
--- a/Basics/5_Must_Know_OpenCV_Functions.py
+++ b/Basics/5_Must_Know_OpenCV_Functions.py
@@ -6,10 +6,10 @@
 print(kernel)
 
 path = "Resources/lena.png"
-img =  cv2.imread(path)
-imgGray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
-imgBlur = cv2.GaussianBlur(imgGray,(7,7),0)
-imgCanny = cv2.Canny(imgBlur,100,200)
+img =  cv2.imread(path)  #reads image
+imgGray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY) #this converts image to gray scale and opencv uses BGR not RGB
+imgBlur = cv2.GaussianBlur(imgGray,(7,7),0) #kernel size (7,7) must be odd , larger means more blur
+imgCanny = cv2.Canny(imgBlur,100,200) #detects sudden changes in pixel intensity
 imgDilation = cv2.dilate(imgCanny,kernel , iterations = 10)
 imgEroded = cv2.erode(imgDilation,kernel,iterations=2)