{"type":"ScholarlyArticle","title":"Scale and Direction Guided GAN for Inertial Sensor Signal Enhancement","authors":[{"name":"Yifeng Wang","slug":"yifeng-wang","given":"Yifeng","family":"Wang","affiliation":"School of Science , Harbin Institute of Technology , Shenzhen"},{"name":"Yi Zhao","slug":"yi-zhao","given":"Yi","family":"Zhao","affiliation":"School of Science , Harbin Institute of Technology , Shenzhen"}],"abstract":"Inertial sensors, serving as attitude and motion sensing components, are extensively used in various portable devices spanning consumer electronics, sports health, aerospace, etc. However, the severe intrinsic errors of inertial sensors greatly restrict their capability to implement advanced functions, such as motion tracking and semantic recognition. Although generative models hold significant potential for signal enhancement, unsupervised or weakly-supervised generative methods may not achieve ideal generation results due to the absence of guidance from paired data. To address this, we propose a scale and direction-guided generative adversarial network (SDG-GAN), which provides dual guidance mechanisms for GAN with unpaired data across two practical application scenarios. In the unsupervised scenario where only unpaired signals of varying quality are available, our scale-guided GAN (SG-GAN) forces the generator to learn high-quality signal characteristics at different scales simultaneously via the proposed self-supervised zoom constraint, thereby facilitating multi-scale interactive learning. In the weakly-supervised scenario, where additional experimental equipment can provide some motion information, our direction-guided GAN (DG-GAN) introduces auxiliary tasks to supervise signal generation while avoiding interference from auxiliary tasks on the main generation task. Extensive experiments demonstrate that both the unsupervised SG-GAN and the weakly-supervised DG-GAN significantly outperform all comparison methods, including fully-supervised approaches. The combined SDG-GAN achieves remarkable results, enabling unimaginable tasks based on the original inertial signal, such as 3D motion tracking.","doi":"10.24963/ijcai.2024/567","url":"https://ijcai.org/proceedings/2024/567","pdf":"https://ijcai.org/proceedings/2024/0567.pdf","markdown":"https://ijcai.org/proceedings/2024/567.md","bibtex":"https://ijcai.org/proceedings/2024/bibtex/567","volume":{"slug":"2024","title":"Proceedings of the Thirty-Third International Joint Conference on Artificial Intelligence","short_title":"IJCAI 2024","url":"https://ijcai.org/proceedings/2024/","year":2024,"location":"Jeju, Korea","dates":"3-9 August 2024","editors":"Kate Larson","isbn":"978-1-956792-04-1","publisher":"International Joint Conferences on Artificial Intelligence Organization","doi_prefix":"10.24963/ijcai.2024"},"section":"Machine Learning","track":"Main Track","number":567,"pages":{"first":5126,"last":5134},"keywords":["Machine Learning: ML: Weakly supervised learning","Machine Learning: ML: Generative models","Multidisciplinary Topics and Applications: MTA: Sensor networks and smart cities","Machine Learning: ML: Unsupervised learning"],"videos":[],"references":[{"position":1,"raw":"[Boronakhin et al., 2022] Alexander M Boronakhin, Ro- man V Shalymov, Daniil Yu Larionov, Nguyen Quoc Khanh, and Nguyen Trong Yen. 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