In this chapter, you learned about the premise of augmented reality and understood what an augmented reality system looks like. We discussed the geometric transformations required for augmented reality. You learned how to use those transformations to estimate the camera pose. You learned how to track planar objects. We discussed how we can add virtual objects on top of the real world. You learned how to modify the virtual objects in different ways to add cool effects. Remember that the world of computer vision is filled with endless possibilities! This book is designed to teach you the necessary skills to get started on a wide variety of projects. Now it's up to you and your imagination to use the skills you have acquired here to build something unique and interesting.