Publications

2026

1. GetMobile ’25

   VFM in Your Hands: Optimizing Real-Time Scene Understanding for Mobile Augmented Reality

   Jeho Lee, Chanyoung Jung, Gunjoong Kim, and 3 more authors

   GetMobile: Mobile Computing and Communications, Vol. 29, No. 4

   (Invited)

   Abs PDF

   Mobile Augmented Reality (AR) applications demand high-quality, real-time visual prediction, including pixel-level depth and semantics, to enable immersive and context-aware user experiences. Recently, Vision Foundation Models (VFMs) have offered strong generalization capabilities on diverse and unseen data, supporting scalable mobile AR experiences. However, deploying VFMs on mobile devices is challenging due to computational limitations, particularly in maintaining both prediction accuracy and real-time performance. In this article, we present ARIA [3], the first system that enables on-device inference acceleration of a VFM. ARIA employs the heterogeneity of mobile processors through a parallel and selective inference scheme: full-frame prediction is periodically offloaded to a processor with high parallelism capability like GPU, while lowlatency updates on dynamic regions are conducted via a specialized accelerator like NPU. Implemented and evaluated using mobile devices, ARIA achieved significant improvements in accuracy and deadline success rate on real-world mobile AR scenarios.

2025

1. MobiCom ’25

   

   Vega: Fully Immersive Mobile Volumetric Video Streaming with 3D Gaussian Splatting

   Gunjoong Kim*, Seonghoon Park*, Jeho Lee, and 3 more authors

   In Proceedings of the 31st Annual International Conference on Mobile Computing and Networking (ACM MobiCom 2025)

   Acceptance ratio: 77/588=13.1%

   Abs PDF

   For highly immersive mobile volumetric video streaming, it is essential to deliver photo-realistic full-scene content with smooth playback. Unlike traditional representations such as point clouds, 3D Gaussian Splatting (3DGS) has gained attention for its ability to represent high-quality full-scene 3D content. However, our preliminary experiments show that existing methods for 3DGS-based videos fail to achieve smooth playback on mobile devices. In this paper, we propose Vega, a 3DGS-based photo-realistic full-scene volumetric video streaming system that ensures real-time playback on mobile devices. The core idea behind Vega’s real-time rendering is object-level selective computation, which allocates computational resources to visually important objects to meet strict rendering deadlines. To enable mobile streaming based on the selective computation, Vega addresses two challenges: (1) designing an encoding scheme that optimizes the data size of videos while being compatible with object-level prioritization, and (2) developing a rendering pipeline that efficiently operates on resource-constrained mobile devices. We implemented an end-to-end Vega system, consisting of a streaming server and an Android application. Experimental results on commodity smartphones show that Vega achieves 30 frames per second (FPS) for full-scene volumetric video streaming while maintaining competitive data size and visual quality compared to existing baselines.

2. MobiSys ’25

   

   ARIA: Optimizing Vision Foundation Model Inference on Heterogeneous Mobile Processors for Augmented Reality

   Chanyoung Jung*, Jeho Lee*, Gunjoong Kim, and 3 more authors

   In The 23rd Annual International Conference on Mobile Systems, Applications, and Services (ACM MobiSys 2025)

   Acceptance ratio: 43/233=18.0% | Invited to ACM GetMobile

   Abs PDF Teaser Presentation 🏆 Best Paper Award

   

   Best Paper Award

   Best Paper Award

   Mobile Augmented Reality (AR) applications demand high-quality, real-time visual prediction, including pixel-level depth and semantics, to enable immersive and context-aware user experiences. Recently, Vision Foundation Models (VFMs) offer strong generalization capabilities on diverse and unseen data, supporting scalable mobile AR experiences. However, deploying VFMs on mobile devices is challenging due to computational limitations, particularly in maintaining bothprediction accuracy and real-time performance. In this paper, we present ARIA, the first system that enables on-device inference acceleration of a VFM. ARIA employs the heterogeneity of mobile processors through a parallel and selective inference scheme: full-frame prediction is periodically offloaded to a processor with high parallelism capability like GPU, while low-latency updates on dynamic regions are conducted via a specialized accelerator like NPU. Implemented and evaluated using mobile devices, ARIA achieved significant improvements in accuracy and deadline success rate on diverse real-world mobile AR scenarios.

2024

1. MobiCom ’24

   

   Panopticus: Omnidirectional 3D Object Detection on Resource-constrained Edge Devices

   Jeho Lee, Chanyoung Jung, Jiwon Kim, and 1 more author

   In The 30th Annual International Conference on Mobile Computing and Networking (ACM MobiCom 2024)

   Acceptance ratio: 103/494=20.9%

   Abs PDF

   3D object detection with omnidirectional views enables safety-critical applications such as mobile robot navigation. Such applications increasingly operate on resource-constrained edge devices, facilitating reliable processing without privacy concerns or network delays. To enable cost-effective deployment, cameras have been widely adopted as a low-cost alternative to LiDAR sensors. However, the compute-intensive workload to achieve high performance of camera-based solutions remains challenging due to the computational limitations of edge devices. In this paper, we present Panopticus, a carefully designed system for omnidirectional and camera-based 3D detection on edge devices. Panopticus employs an adaptive multi-branch detection scheme that accounts for spatial complexities. To optimize the accuracy within latency limits, Panopticus dynamically adjusts the model’s architecture and operations based on available edge resources and spatial characteristics. We implemented Panopticus on three edge devices and conducted experiments across real-world environments based on the public self-driving dataset and our mobile 360° camera dataset. Experiment results showed that Panopticus improves accuracy by 62% on average given the strict latency objective of 33ms. Also, Panopticus achieves a 2.1× latency reduction on average compared to baselines.