We investigate camera-based interaction techniques suitable for generating simple, easy-to-use augmented reality applications. All the interaction techniques described are based on using only the camera as input device, so that users can interact with 3D content of the application by gesturing with camera movements. With two test applications, we have identified several camerabased interaction techniques that work well with interactive augmented reality 3D content and are intuitive to use and reliable to detect. The test applications are interesting also in their own right, demonstrating technical features such as markerless tracking as well as mobile phone implementation. Categories and Subject Descriptors H.5.1 [Information Systems]: Multimedia Information Systems – Artificial, Augmented, and Virtual Realities; I.3.6 [Computer Graphics]: Methodology and Techniques – Interaction Techniques. General Terms Design, Experimentation, Human Factors. Keywords augmented reality, interact...