Research Interest

• Applied Artificial Intelligence / Deepfake and AI-Generated Content (AIGC)

• Multimodal Learning / LLM

Education

• [Jul. 2025 ~ Present] Sungkyunkwan University, Republic of Korea

  •  M.S in Dept. of Applied Artificial Intelligence (DSAIL Lab)

Work Experience

• [Oct. 2022 ~ Jun. 2025] Data Scientist @ I-screamarts       

  • Developed PITR project for art therapy 

    • Image Classification, Segmentation, LLM, ONNX

  • Developed a multimodal API application project Text-to-Sketch, LLM

• [Jun. 2022 ~ Sep. 2022] Data Scientist @ AI-leader                                                

  • CCTV-based abnormal behavior detection project (Image Classification, Segmentation)        

• [Sep. 2021 ~ Dec. 2021] Intern @ HLab                                                    

  • Predictive maintenance project using vibration, temperature, and humidity sensor data (Time series prediction)

  • Smart mirror development project focused on healthcare solutions (Keypoint detection)

Leadership & Mentoring

• [Aug. 2024 – Present] Mentor, Comento

  • Mentored students on AI, Computer Vision, and project planning through online technical mentoring sessions.

Skills

* Skill level - 1: Basic / 2: Demonstrating / 3: Proficient

• Language | Python (3), HTML/CSS (2)

• Framgeworks | Pytorch (3), Tensorflow (3), FastAPI (3), Flask (1), MLflow (1)

• Infrastructure | Docker (2), AWS (2)

• Database | MySQL (2)

• BI | Streamlit (3), Tableau (1)

Publication
(* = (co-)corresponding author, ** = equal contributions) 

[2026]

• GRAIN: Detecting AI-Generated News via Article-Level Structure

  • Youjin Lee, Chaewon Kang, Yunseok Choi, Jinyoung Han*

  • ACM International Conference on Information and Knowledge Management 2026 (CIKM), 2026, accepted.; camera-ready version in preparation. (BK IF = 3)

• Adaptive Token-Aware Query Reformulation for Text-to-Image Retrieval

  • Seonah Kim, MinKeon Kim, Youjin Lee, Jaekwang Kim, Jinyoung Han, Eunil Park*

  • ACM SIGIR International Conference on the Theory of Information Retrieval 2026 (ICTIR), 2026, accepted.

• HAUTE: Harmonizing Action Units with Temporal-contextual Embeddings for Deepfake Detection

  • Chaewon Kang, Youjin Lee, Jinyoung Han*

  • The Web Conference 2026 (WWW), Jan. 2026, accepted. (acceptance rate 23%, BK IF = 4) 

• If I Change Your Eyes, Are You Still You? Identity Thresholds in Deepfake Perception

  • Chaewon Kang, Youjin Lee, Haewoon Kwak, Jisun An, Jinyoung Han*

  • The ACM CHI Conference on Human Factors in Computing Systems 2026 (CHI), Jan. 2026, accepted. (BK IF = 4)

• What I Meant, What You Felt: AI-Mediated Collaborative Drawing for Parent–Child Reflection

  • JongHan Kim**, Hyunseon Won**, Youjin Lee, Taeeun Kim, Yonghoon Kim, Jinyoung Han*

  • The ACM CHI Conference on Human Factors in Computing Systems 2026 (CHI), Jan. 2026, accepted. (BK IF = 4)

[2025]

• Decoding Stress and Coping Ability Levels through Drawing Features in the Person-In-The-Rain Test: An Exploratory Study Using a Digital Drawing Device.

  • Jeahong Kim, Minwoo Jo, Sooleen Nam, Youjin Lee, Yeonji Baik*

  • Computers in Human Behavior Reports, Elsevier, In press. (JIF = 5.5)

Honors & Awards

• AI SeoulTech Graduate Fellowship, Jun. 2026 — Merit-based fellowship awarded to outstanding AI graduate researchers (KRW 20 million)

• 3rd Place Award, Korea Gas Corporation Big Data & AI Startup Competition, Dec. 2021

• Excellence Award, POSTECH Hustar AI & SW Academy, Oct. 2021

• Excellence Award in Visualization Project, Multicampus K-Digital Training, Jan. 2021

Projects

• [Sep. 2025 ~ Oct. 2025] Adaptive Attention and Weighted Token Routing for Text-to-Image Retrieval

  • Improved retrieval quality by dynamically weighting text tokens and re-ranking image results

• [Oct. 2024 ~ Oct. 2025] eye and cataract classification @ LabSD, KakaoImpact      

  • Developed eye and cataract classification models (Image Embedding, Image Classification)

  • Optimized and compressed classification models for on-device deployment (ONNX)

• [Dec. 2021 ~ Jun. 2022] Plant and Plant Disease Recognition Project as part of Multicampus K-Digital Training                    

• [Oct. 2021 ~ Dec. 2021] Gas Supply Forecasting in Korea Gas Corporation Dacon Competition                               

• [Apr. 2021 ~ Oct. 2021] Mate Recommendation System Project at POSTECH Hustar AI & SW Academy        

Patents

• “PITR Evaluation Factor Automatic Extraction System with Object Detection Model for AI Stress Picture Psychological Test”, Korean Patent No. 10-2798773-0000, Granted April 16, 2025, Applicant: Icecream Art Co., Ltd.

• “Face Orientation Classification Model for AI Stress Picture Psychology Test”, Korean Patent No. 10-2797512-0000, Granted April 14, 2025, Applicant: Icecream Art Co., Ltd.

• “PITR Evaluation Factor Automatic Extraction System with Spatial Classification Model for AI Stress Picture Psychological Test”, Korean Patent No. 10-2797514-0000, Granted April 14, 2025, Applicant: Icecream Art Co., Ltd.

• “PITR Evaluation Factor Automatic Extraction System with Facial Emotion Classification Model for AI Stress Picture Psychological Test”, Korean Patent No. 10-2797513-0000, Granted April 14, 2025, Applicant: Icecream Art Co., Ltd.

• “Child Drawing Understanding and Analysis Reporting System”, Korean Patent No. 10-2772977-0000, Granted February 20, 2025, Applicant: Icecream Art Co., Ltd.

• “System and Method for Providing AI Stress-Related Psychological Examination Service”, Korean Patent No. 10-2698984-0000, Granted August 21, 2024, Applicant: Icecream Art Co., Ltd.