Update README.md

Author: small-yellow-duck

README.md

@@ -43,6 +43,7 @@ OpenCV has a face detection tool that is based on an algorithm from 2001 called
 
 
 # project ideas
+- intermediate: adapt code for adding a face to an astronaut helmet so that it uses video instead of a still image (https://www.twilio.com/blog/2015/11/getting-started-with-opencv-and-python-featuring-the-martian-2.html)
 - (intermediate-hard) apply snapchat filters to faces in images from your webcam (http://blog.stickpng.com/create-snapchat-filters-png-stickers/)
 - (easy) write a function that will convert an rgb image with a solid colour background to an image with a transparent background
 - (intermediate-hard) write a program that will allow you to use opencv to draw a box on an image and to save the coordinates of the box (might be handy if you ever want to label your own face detection algoirthm training data!)