I'm Kazia Otake from Nagoya University.I'm going to talk about tactile-texture rendering forElectro-static friction displays in cooperation oflow frequency friction model and high frequency texture model.An electro-static friction display controls theelectro-static adaptive force between the finger part and the panel.It is suitable for presenting fine textures.In previous data-driven models for rendering textures,mainly the high frequency texture component were used.However, since the low frequency friction component also containsthe material information, both frequency components should be considered.Our objective is to improve texture quality by combiningtwo types of models to cover a wide frequency range.One of them is a physical model for the low frequency component,and the other is a statistical model for the high frequency texture component.We measure the coefficient of friction while a finger slides on a texture.Then,the coefficient of friction was divided into low and high frequency components.For example,the left figure shows a coefficient of friction of then.The central and right one shows its low and high frequency components.The low frequency friction component is rendered by a physical model,which responds to the finger load and the velocity.The high frequency friction component is rendered by a statistical model,autoregressive model that preserves frequency characteristics of the coefficient of friction.To compare the two similar conditions,we conducted a user study.We investigated whether the combination of low and high frequency stimuliimproves the quality of texture.We compared two similar conditions.In one condition,low and high frequency components were incorporated.In another condition,only the low frequency component was presented.The experiment was a two-ontentive task.Participants selected the more realistic stimulus from the two similar conditions.Four types of materials,weather,cork,dain and wood,were presented.This shows the main proportions of participant's answersand their 95% confidence interval.BlueBush shows the proportions that the combined model was selected as more realisticand RangeBush shows the proportions of friction model only.For cork and dain,the combined model was preferred.In contrast,there was no significant difference between the twosimilar conditions for the weather and wood.So,the effect of the method depends on the types of texture.In summary,the combination of physical model for the low frequency componentand statistical model for the high frequency componentimproves the realism of virtual textures.Thank you for listening.