Ziyuan Liu (刘子源)

Ziyuan Liu (刘子源)

Tsinghua University

👋 About Me

Ph.D. student at Tsinghua University.

🔍Research Topics

  • Remote Sensing: SAR Image Processing, Change Detection, etc.
  • Computer Vision: Deep Image Compression, Image Denoising, Image Super-Resolution, etc.
  • Deep Learning: Knowledge Distillation, Foundation Models, etc.

🔥 News

  • 2025.02: Our large-scale, high-resolution, all-inclusive remote sensing change detection dataset JL1-CD is now open-source! Dataset: JL1-CD Dataset, Paper: JL1-CD: A Large-Scale High-Resolution All-Inclusive Change Detection Dataset 📂.
  • 2025.01: 获得第二届“吉林一号”杯卫星遥感应用青年创新创业大赛 赛题A“高分辨率遥感数据道路提取研究”冠军和赛题B“高分辨率遥感影像全要素变化检测研究”亚军.
  • 2024.12: 荣获2024-2025年度清华大学马约翰杯游泳比赛甲组男子200米蛙泳冠军、6×50米自由泳接力冠军，助力电子系问鼎2024年游泳马杯甲组冠军 🏆.
  • 2024.11: 荣获研究生国家奖学金.
  • 2024.11: 在全国城市系列赛青岛站中，荣获18-24岁组200米蛙泳冠军、200米仰泳冠军 🏊‍♂️.
  • 2024.09: 在第24届全国成人游泳锦标赛中，荣获18-24岁组200米蛙泳冠军、200米仰泳冠军 🏅.

📖 Educations

💻 Work Experiences

📝 Selected Publications

Remote Sensing Change Detection

arXiv 2025
sym

JL1-CD: A New Benchmark for Remote Sensing Change Detection and a Robust Multi-Teacher Knowledge Distillation Framework
Ziyuan Liu, Ruifei Zhu, Long Gao, Yuanxiu Zhou, Jingyu Ma, Yuantao Gu

Code

  • We introduce JL1-CD, a new sub-meter, all-inclusive open-source CD dataset comprising 5,000 pairs of remote sensing image patches with a resolution of 0.5–0.75 meters.
  • We propose a multi-teacher knowledge distillation (MTKD) framework, which significantly improves the performance of CD models with various network architectures and parameter sizes without increasing any computational or time cost during inference.

SAR Image Processing

TGRS 2024
sym

DSRKD: Joint Despecking and Super-Resolution of SAR Images via Knowledge Distillation
Ziyuan Liu, Shaoping Wang, Ying Li, Yuantao Gu, Quan Yu

  • We propose the DSRKD network, with an encoder–upscaling–decoder architecture that allows for SR at various resolution scales. The encoder and decoder can also be replaced with various more complex modules, and various distillation methods can be easily added, making it a simple and efficient baseline for despeckling SR.
  • We innovatively combine the SR of speckled images with denoising using knowledge distillation (KD), significantly improving the performance of the model without introducing any additional computational overhead during inference.
GRSL 2024
sym

SAR Image Compression With Inherent Denoising Capability Through Knowledge Distillation
Ziyuan Liu, Shaoping Wang , Yuantao Gu

  • We innovatively utilize a KD mechanism to combine compression with denoising for speckled images. Our method exhibits superior performance compared to other methods on both synthetic and SAR datasets.
  • The distillation mechanism is applicable to various learned image compression algorithms and consistently enhances their performance.
  • This enhancement is achieved without introducing extra complexity in terms of computational time and memory utilization during inference.

🛠 Projects

  • 2023-2026, 针对XXX技术，国家自然科学基金XXX重点项目
  • 2022-2023, 基于全视觉的多运动自动检测项目

🏆 Selected Competitions

  • 2025, 第二届“吉林一号”杯卫星遥感应用青年创新创业大赛 赛题A“高分辨率遥感数据道路提取研究” TOP1. (Team leader) (URL)
  • 2025, 第二届“吉林一号”杯卫星遥感应用青年创新创业大赛 赛题B“高分辨率遥感影像全要素变化检测研究” TOP2. (Team leader) (URL | Code)

🎖 Honors and Awards

  • 2025, Champion of Topic A “Road Extraction from High-Resolution Remote Sensing Data” in the 2nd “Jilin-1” Cup Youth Innovation and Entrepreneurship Competition for Satellite Remote Sensing Applications, Jilin Provincial Department of Education | 第二届“吉林一号”杯卫星遥感应用青年创新创业大赛 赛题A“高分辨率遥感数据道路提取研究”冠军，吉林省教育厅
  • 2025, Runner-up of Topic B “Full-Element Change Detection in High-Resolution Remote Sensing Images” in the 2nd “Jilin-1” Cup Youth Innovation and Entrepreneurship Competition for Satellite Remote Sensing Applications, Jilin Provincial Department of Education | 第二届“吉林一号”杯卫星遥感应用青年创新创业大赛 赛题B“高分辨率遥感影像全要素变化检测研究”亚军，吉林省教育厅
  • 2024, National Scholarship for Graduate Student, Ministry of Education | 研究生国家奖学金
  • 2024, First Prize of Lu Dajin & Liu Runsheng Outstanding Teaching Assistant Award, Department of Electronic Engineering, Tsinghua University | 清华大学电子工程系陆大䋮·刘润生优秀助教奖一等奖
  • 2021, Sports Scholarship, Tsinghua University | 清华大学体育优秀奖
  • 2021, Social Work Scholarship, Tsinghua University | 清华大学社会工作优秀奖
  • 2020, Academic Scholarship, Tsinghua University | 清华大学学业优秀奖
  • 2020, Sports Scholarship, Tsinghua University | 清华大学体育优秀奖
  • 2019, National Scholarship for Undergraduate Student, Ministry of Education | 本科生国家奖学金
  • 2019, Comprehensive Scholarship, Tsinghua University | 清华大学综合奖学金
  • 2019, Academic Scholarship, Tsinghua University | 清华大学学业优秀奖
  • 2019, Sports Scholarship, Tsinghua University | 清华大学体育优秀奖

🏊‍♂️ Sports

  • 2024.12: 清华大学马约翰杯游泳比赛甲组男子200米蛙泳冠军、100米蛙泳第四、6×50米自由泳接力冠军、4×50米混合泳接力亚军，助力电子系问鼎游泳马杯甲组冠军 🏆.
  • 2024.11: 全国城市游泳系列赛青岛站，18-24岁组200米蛙泳冠军、200米仰泳冠军 🏆.
  • 2024.09: 第24届全国成人游泳锦标赛（成人游泳爱好者国内最高赛事），18-24岁组200米蛙泳冠军、200米仰泳冠军 🏆.
  • 2023.12: 清华大学健美马杯男子模特全场倒数第二 😅.
  • 2023.12: 清华大学游泳研究生联赛50米蛙泳冠军、4×50米自由泳接力冠军、4×50米混合泳接力冠军，助力电子系联赛三连冠 🏆.
  • 2023.11: 清华大学马约翰杯游泳比赛甲组男子200米蛙泳冠军、50米蛙泳第四 🏆.
  • 2023.08: 全国城市游泳系列赛北京站，18-24岁组200米蛙泳亚军、100米蛙泳第四 🏅.
  • 2023.06: 宁波梅山湾游泳马拉松挑战赛（全程13.5km）成功完赛.
  • 2023.03: 清华大学马约翰杯游泳比赛甲组男子200米蛙泳季军 🏅.
  • 2022.07: “梦之蓝杯”通化市大众游泳比赛100米蛙泳亚军 🏅.
  • 2021.11: 清华大学马约翰杯游泳比赛甲组男子200米蛙泳冠军 🏆.
  • 2021.03: 清华大学马约翰杯游泳比赛甲组男子200米蛙泳亚军、100米蛙泳第四 🏅.
  • 2018.12: 清华大学马约翰杯游泳比赛乙组男子100米蛙泳冠军、50米蛙泳冠军 🏆.

🔗 Academic Service

  • Reviewer for IEEE Transactions on Geoscience and Remote Sensing (TGRS)
  • Reviewer for IEEE Geoscience and Remote Sensing Letters (GRSL)