diff -r 3e554af428a4 -r ef2afc5ceb3f day2/session1.tex
--- a/day2/session1.tex	Tue Oct 06 18:43:15 2009 +0530
+++ b/day2/session1.tex	Tue Oct 06 18:45:01 2009 +0530
@@ -326,7 +326,10 @@
     \begin{enumerate}
     \item Convert an RGB image to Grayscale. $ Y = 0.5R + 0.25G + 0.25B $
     \item Scale the image to 50\%
-    \item Introduce some random noise?
+    \item Introduce some random noise
+    \item Smooth the image using a mean filter
+      \\\small{Take the mean of all the neighbouring elements}
+      \\\small{How fast can you do it?}
     \end{enumerate}
 \inctime{15}
 \end{frame}