Projection Based HCI System using Image Processing

We use camera attach to the projector to locate a frame shape marker embedded in the large image. Interactive public displays give access as an innovative media to promote enhanced communication between people and information. In this project, we proposed idea to implement contents with interaction elements for vision-based digital public display. Virtual object, laser point detection and projection installation are applied for attracting attention from user. Preliminary study showed positive feedback of interactive content designing towards the public display. This project enables an effective low cost touch interface utilizing only a single camera and a projector. It embeds a small shape in the image generated by the user application (e.g. a touch screen menu with icons) and detects touch by measuring the geometrical distortion in the camera captured image.