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Our objective is to create a system that enables users to interact with surrounding surfaces by using touch interactions. In this work, we propose a touch detection method that utilizes the shadows of a finger for use with a system featuring an infrared (IR) camera and two IR lights. Since the shape of a finger's shadow varies depending on the distance between the surface and the finger, the system...
In this paper, we propose the ‘in‐air finger motion interface’, which solves a problem users face in interacting with mobile devices. The interface uses only a single small camera to track the three‐dimensional (3D) position of the user's finger. The finger region is robustly extracted by using flashing infrared light‐emitting diodes (LEDs) and by obtaining the difference image between an illuminated...
Mobile devices are too small to operate freely using their input surfaces. To solve this problem, non-contact and natural gesture interfaces have been the focus of recent research. In this paper we propose a method of estimating multi-finger position and pose for operating such devices at high speed using a single camera. Our method achieves the finger tracking based on the appearance and shape deformation...
In this paper, we explore the usability of the “In-air Typing Interface” that we developed to overcome the problems common with traditional mobile interfaces. We performed two studies focused on frame rate, latency, and tactile feedback. We found that reducing the latency even by several milliseconds can improve the operating efficiency, and the frame rate partly affects the efficiency. Tactile feedback...
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