Current Research

  • Haptic augmented reality (AR) allows a user to explore a real environment augmented with virtual haptic stimuli. For example, medical students can palpate a virtual tumor inside a real mannequin using a haptic AR system to practice cancer screening. To realize such functionality of haptic AR, we need to alter the haptic attributes of a real object by means of virtual haptic feedback. Our research for haptic AR aims at developing a systematic methodology for modulating the haptic properties of a real object with the aid of a haptic interface.

  • This project aims at establishing methodology for modeling human sensorimotor skills and transferring the modeled skills to the trainee using haptic interfaces. Just like visual images and sound files, human skills should be able to be stored in digital media and reproduced on the need basis. This research strives to find effective means for coherent skill modeling and transfer, covering both force-feedback and vibrotactile interfaces.This project is supported by National Research Foundation of Korea under the National Research Laboratory (NRL) Program (currently called Do-Yak).

  • We have pursued diverse research projects in order to improve and extend user interaction and experience by means of vibrotactile feedback on several different platforms including mobile devices, automobiles, and chairs. To this end, understanding human perception of complex vibrotactile stimuli is essential to develop effective interfaces. Our research outcomes may provide applied yet crucial knowledge on vibrotactile perception for many important applications.

  • Mobile devices are an indispensable personal gadget in our daily life. It, however, suffers from relatively inconvenient user interface because of its small form factor. As such, extending the limited UI of mobile devices using vibrotactile feedback has been an intensive research topic in both academics and industry. We have been conducting various research topics in this regard. Many of our projects were supported by or in collaboration with major companies including LG Electronics and Samsung Electronics.

  • Convenient software that facilitates production of haptic content is indispensable for the widespread of haptics technology to the general public. However, such tools are very rare, and research effort to develop good ones has been less intense. To respond to this need, we have been developing several authoring tools for vibrotactile stimuli with distinctive features.

  •  This research is about PhysVib: a software solution on the mobile platform extending an open-source physics engine in a multi-rate rendering architecture for automatic vibrotactile feedback upon collision events. PhysVib runs concurrently with a physics engine at a low update rate and generates vibrotactile feedback commands at a high update rate based on the simulation results of the physics engine using an exponentially-decaying sinusoidal model.

  • Creating haptic effects that are well synchronized with visual-audio content is not a trivial task, requiring good software tools and significant man hours. One promising approach to alleviate this problem is to provide algorithms that can automatically synthesize haptic effects by extracting important features from existing visual-audio content.