At ICME 2014 in Chengdu, China, we presented a technical demo called “Gesture Viewport,” which is a projector-camera system that enables finger gesture interactions with media content on any surface. In the demo, we used a portable Pico projector to project a viewport widget (along with its content) onto a desktop and a Logitech webcam to monitor the viewport widget. We proposed a novel and computationally efficient finger localization method based on the detection of occlusion patterns inside a virtual “sensor” grid rendered in a layer on top of the viewport widget. We developed several robust interaction techniques to prevent unintentional gestures from occurring, to provide visual feedback to a user, and to minimize the interference of the “sensor” grid with the media content. We showed the effectiveness of the system through three scenarios: viewing photos, navigating Google Maps, and controlling Google Street View. Click on the following link to watch a short video clip that illustrates these scenarios.
Many people who had seen the demo were impressed. They thought that the idea behind the demo, that is the proposed occlusion pattern based finger localization method, was very clever. That probably is a big reason why we won the Best Demo Award at ICME 2014. For more details of the demo, please refer to this paper.