Augmented reality (AR) is a combination of a physical scene viewed by a user and a virtual scene generated by a computer that augments the scene with additional information. Basically, a meaning of reality is real thing, while a meaning of augmented means increased or enhanced. A combination definition of augmented reality is to mix between real world and virtual world together. It is generated a composite view for the user. This textbook describes fundamental knowledge and recent interesting applications about augmented reality and computer vision (CV). This book is ideal for you if you want to learn and understand augmented reality and computer vision.