@article{10.1145/3698113,
  author = {Zhang, Peiyu and Ying, Wen and Riggs, Sara L and Heo, Seongkook},
  title = {Moir\'{e}Tag: A Low-Cost Tag for High-Precision Tangible Interactions without Active Components},
  year = {2024},
  issue_date = {December 2024},
  publisher = {Association for Computing Machinery},
  address = {New York, NY, USA},
  volume = {8},
  number = {ISS},
  url = {https://doi.org/10.1145/3698113},
  doi = {10.1145/3698113},
  abstract = {In this paper, we present Moir\'{e}Tag—a novel tag-like device that magnifies displacement without active components for indirect sensing of subtle tangible interactions. The device consists of two overlapping layers of stripe patterns with distinct pattern frequencies. These layers create Moir\'{e} fringes that can move faster than the actual movement of a layer. Using a customized image processing pipeline, we show that Moir\'{e}Tag can reliably detect sub-mm movement in real-time (mean error = 0.043 mm) under varying lighting conditions, camera angles, and camera distances. We also demonstrate five applications of Moir\'{e}Tag to showcase its potential as a low-cost solution to capture and monitor small changes in movement and other physical properties, such as force and volume, by converting them into displacement.},
  journal = {Proc. ACM Hum.-Comput. Interact.},
  month = oct,
  articleno = {525},
  numpages = {19},
  keywords = {Moir\'{e} pattern, displacement magnification, force sensing, force visualization, tangible interface, wearable sensor}
}

@inproceedings{10.1145/3544548.3581148,
    author = {Hu, Erzhen and Gr\o{}nb\ae{}k, Jens Emil Sloth and Ying, Wen and Du, Ruofei and Heo, Seongkook},
    title = {ThingShare: Ad-Hoc Digital Copies of Physical Objects for Sharing Things in Video Meetings},
    year = {2023},
    isbn = {9781450394215},
    publisher = {Association for Computing Machinery},
    address = {New York, NY, USA},
    url = {https://doi.org/10.1145/3544548.3581148},
    doi = {10.1145/3544548.3581148},
    abstract = {In video meetings, individuals may wish to share various physical objects with remote participants, such as physical documents, design prototypes, and personal belongings. However, our formative study discovered that this poses several challenges, including difficulties in referencing a remote user’s physical objects, the limited visibility of the object, and the friction of properly framing and orienting an object to the camera. To address these challenges, we propose ThingShare, a video-conferencing system designed to facilitate the sharing of physical objects during remote meetings. With ThingShare, users can quickly create digital copies of physical objects in the video feeds, which can then be magnified on a separate panel for focused viewing, overlaid on the user’s video feed for sharing in context, and stored in the object drawer for reviews. Our user study demonstrated that ThingShare made initiating object-centric conversations more efficient and provided a more stable and comprehensive view of shared objects.},
    booktitle = {Proceedings of the 2023 CHI Conference on Human Factors in Computing Systems},
    articleno = {365},
    numpages = {22},
    keywords = {augmented communication, collaborative work, object-centered meetings, shared task space, video-mediated communication},
    location = {Hamburg, Germany},
    series = {CHI '23}
  }

@INPROCEEDINGS{10160313,
  author={Hildebrandt, Carl and Ying, Wen and Heo, Seongkook and Elbaum, Sebastian},
  booktitle={2023 IEEE International Conference on Robotics and Automation (ICRA)}, 
  title={Mimicking Real Forces on a Drone Through a Haptic Suit to Enable Cost-Effective Validation}, 
  year={2023},
  volume={},
  number={},
  pages={10518-10524},
  keywords={Propellers;Shape;Wind tunnels;Synthesizers;Transforms;Haptic interfaces;Behavioral sciences},
  doi={10.1109/ICRA48891.2023.10160313}
}

@inproceedings{10.1145/3526114.3558706,
  author = {Zhang, Peiyu and Ying, Wen and Heo, Seongkook},
  title = {Fringer: A Finger-Worn Passive Device Enabling Computer Vision Based Force Sensing Using Moir\'{e} Fringes},
  year = {2022},
  isbn = {9781450393218},
  publisher = {Association for Computing Machinery},
  address = {New York, NY, USA},
  url = {https://doi.org/10.1145/3526114.3558706},
  doi = {10.1145/3526114.3558706},
  abstract = {Despite the importance of utilizing forces when interacting with objects, sensing force interactions without active force sensors is challenging. We introduce Fringer, a finger sleeve that physically visualizes the force to allow a camera to estimate the force without using any active sensors. The sleeve has stripe-pattern slits, a sliding paper with stripe pattern, and a compliant layer that converts force into sliding paper movements. The patterns of the slit and the paper have different frequencies to create Moir\'{e} fringes, which can magnify the small displacement caused by the compliant layer compression for webcams to easily capture such displacement.},
  booktitle = {Adjunct Proceedings of the 35th Annual ACM Symposium on User Interface Software and Technology},
  articleno = {20},
  numpages = {3},
  keywords = {Moir\'{e} patterns, force sensing, force visualization, wearable sensor},
  location = {Bend, OR, USA},
  series = {UIST '22 Adjunct}
}