Abstract
In this paper, we propose a tabletop interface in which a user wears a projector with a depth camera on his or her head and can perform touch operations on an image projected on a flat surface. By using the head-mounted projector, images are always projected in front of the user in the direction of the user's gaze. By changing the image to be projected based on the user's head movement, this interface realizes a large effective screen size. The system superimposes an image on the flat surface by performing plane detection, placing the image on the detected plane, performing perspective projection to obtain a 2D image, and projecting the 2D image using the projector. Registration between the real world and the image is performed by estimating the user's head pose using the detected plane information. Furthermore, touch input is recognized by detecting the user's finger on the plane using the depth camera. We implemented some application examples into the system to demonstrate the usefulness of the proposed interface.
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