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Auflistung nach Schlagwort "display"

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  • Konferenzbeitrag
    DispLagBox: simple and replicable high-precision measurements of display latency
    (Mensch und Computer 2020 - Tagungsband, 2020) Stadler, Patrick; Schmid, Andreas; Wimmer, Raphael
    The latency of a computing system affects users' performance. One important component of end-to-end latency is display lag - the time required to turn framebuffer contents into photons emitted by a computer screen. However, there is no well-documented and widely available method for measuring display lag. Thus, the effect of display lag is rarely considered in scientific studies and system development. We developed DispLagBox, a simple open-source device for measuring display lag. It supports the International Display Measurements Standard but also offers additional metrics for characterizing display lag with a resolution of 0.1 ms. The device, based on a Raspberry Pi computer, measures the time between VSYNC and a change in brightness on the connected display. Repeated measurements can be conducted automatically, so that not only average latency but also latency distributions for each device can be reported. For most displays we tested, DispLagBox reports latencies that are close to those reported by a commercial black-box measurement device. Typically, the difference is 1 - 3 ms.
  • Workshopbeitrag
    Remote Drawing on Vertical Surfaces with a Self-Actuated Display
    (Mensch und Computer 2015 – Proceedings, 2015) Bader, Patrick; Pohl, Norman; Schwind, Valentin; Henze, Niels; Wolf, Katrin; Schneegass, Stefan; Schmidt, Albrecht
    Today, most digital devices are either stationary, often placed on horizontal surfaces like tables, or so-called mobile devices which are carried around by the user. In this demonstration we showcase our ongoing work on a novel type of self-actuated display. It can be placed on walls, or whiteboards and other arbitrarily oriented surfaces like ceilings. It is equipped with a whiteboard marker which allows the device to draw on surfaces it is attached to. In this work, we demonstrate the device's capabilities using an interactive scenario in which users are able to remotely control the self-actuated display to draw lines on a whiteboard. They control the device either by using their own smart phone or a provided tablet computer.