Modeling and Reducing Spatial Jitter caused by Asynchronous Input and Output Rates
| Autor: | Jingjie Zheng, Axel Antoine, Navid Zolghadr, Mathieu Nancel, Géry Casiez, Ella Ge |
|---|---|
| Přispěvatelé: | Université de Lille, Sciences et Technologies, Technology and knowledge for interaction (LOKI), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Research at Google, Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Google Faculty Research Awards Program, ANR-18-CE33-0010,Causality,Inclure la temporalité et la causalité dans la conception de systèmes interactifs(2018) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
noise
jitter Computer science output frequency Pipeline (computing) 05 social sciences Latency (audio) 020207 software engineering 02 engineering and technology Function (mathematics) Signal Refresh rate resampling Control theory Asynchronous communication asynchronicity 0202 electrical engineering electronic engineering information engineering 0501 psychology and cognitive sciences Noise (video) [INFO.INFO-HC]Computer Science [cs]/Human-Computer Interaction [cs.HC] spatial jitter input frequency 050107 human factors Jitter |
| Zdroj: | UIST 2020-ACM Symposium on User Interface Software and Technology UIST 2020-ACM Symposium on User Interface Software and Technology, Oct 2020, Virtual (previously Minneapolis, Minnesota), United States. ⟨10.1145/3379337.3415833⟩ UIST |
| Popis: | International audience; Jitter in interactive systems occurs when visual feedback is perceived as unstable or trembling even though the input signal is smooth or stationary. It can have multiple causes such as sensing noise, or feedback calculations introducing or exacerbating sensing imprecisions. Jitter can however occur even when each individual component of the pipeline works perfectly, as a result of the differences between the input frequency and the display refresh rate. This asynchronicity can introduce rapidly-shifting latencies between the rendered feedbacks and their display on screen, which can result in trembling cursors or viewports. This paper contributes a better understanding of this particular type of jitter. We first detail the problem from a mathematical standpoint, from which we develop a predictive model of jitter amplitude as a function of input and output frequencies, and a new metric to measure this spatial jitter. Using touch input data gathered in a study, we developed a simulator to validate this model and to assess the effects of different techniques and settings with any output frequency. The most promising approach, when the time of the next display refresh is known, is to estimate (via interpolation or extrapolation) the user’s position at a fixed time interval before that refresh. When input events occur at 125 Hz, as is common in touch screens, we show that an interval of 4 to 6 ms works well for a wide range of display refresh rates. This method effectively cancels most of the jitter introduced by input/output asynchronicity, while introducing minimal imprecision or latency. |
| Databáze: | OpenAIRE |
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