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Auflistung nach Schlagwort "Input Device"

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  • Konferenzbeitrag
    Demonstration of an Infrared Pen as an Input Device for Projected Augmented Reality Tabletops
    (Mensch und Computer 2022 - Tagungsband, 2022) Maierhöfer, Vitus; Schmid, Andreas; Wimmer, Raphael
    Interactive tabletops do not only offer a large surface for collaborative interaction. They also offer quick access to digital tools directly at the table - where a large number of everyday activities take place. Tabletops with an embedded display are generally less flexible and more fragile than ordinary massive tabletops. Physical objects on the tabletop occlude the digital content. In contrast, top-down-projected interfaces using an overhead projector-camera system allow for augmenting arbitrary tables and objects lying on them. However, detecting pointing input only via a camera image captured from above requires robustly recognizing whether a finger or pen touches the tabletop or whether it hovers slightly above it. In this demonstration, we showcase a solution for reliably tracking a pen on arbitrary tabletop surfaces. The pen emits infrared light via a tip made of optical fiber. A camera captures position and shape of the light point on the surface. Our open-source tracking algorithm combines heuristics and a neural network to distinguish between drawing and hovering. This system can be reliably used for drawing and writing on tabletops. However, occlusion by users’ hands can deteriorate tracking of the pen.
  • Konferenzbeitrag
    MultiKnob — A Knob for Multiplexing Rotation Inputs by Multitouch-based Grasp Recognition
    (Mensch und Computer 2022 - Tagungsband, 2022) Gellert, Edgar; Petersen, David; Böhmer, Matthias
    Rotary knobs are used on many devices. However, while we enrich the functionalities of smart devices, controlling such functionalities by using the rotation as sole input appears to be rather limited. Therefore, we created a physical rotary controller which enriches the input capabilities of a rotary knob, called MultiKnob. It takes the count of applied fingers as an input parameter for multiplexing rotation. The paper discusses three iterations of our prototyping: Beginning with an attempt to extend an existing rotary controller using conductive paint, to the development of several conductive 3D printed prototypes for use on a smartphone display, to a cylinder sensing multi-touch based on infrared light. We discuss possible applications and limitations of a knob which allows to recognize a user’s grasp.