Seungjun Chu

Research

Two lines of work, one question

Given a lot of something ordinary and very little of anything else, how do you recognize the exception — and how do you keep recognizing it when the conditions move?

Industrial vision

Anomaly detection for industrial inspection

Real inspection lines rarely hand you what a supervised model wants. Defects are rare, so the positive class is thin. Labels are coarse — an operator records that a part failed, not which pixels failed. And the camera, the lighting, and the product itself shift between one line and the next, so a model calibrated on a reference set degrades the moment it meets the floor.

  • CDGP: Contrastive Dual Gaussian Processes for Weakly Supervised Anomaly Segmentation — AAAI 2027, under review, co-first author
  • SPARC: Subspace Position-Aware Robust Few-Shot Calibration for Distribution-Shifted Industrial Anomaly Detection — AAAI 2027, under review, co-first author
  • Wafer defect classification — in preparation for the International Journal of Production Research, first author
  • A Satellite Image-Based Framework for Digitizing Port Yard States and Evaluating Spatial Operational Decisions — KSCM Spring Conference 2026, Best Paper Award
  • Unsupervised anomaly detection — methodology under development, co-first author
  • 3D Gaussian splatting — methodology under development, co-first author

Try it

The playground runs a deliberately small version of this idea in your browser, on real MVTec AD textures and WM-811K wafer maps — a memory bank of presumed-normal patches, and a nearest-neighbor search to find the one that matches nothing. You can race it.

Urban & public systems

Where public systems fail people

A hospital three kilometers away is not close if getting there takes an hour. A train that runs on schedule is not adequate if you cannot board it. The gap between infrastructure that exists on a map and infrastructure that works for the people beside it is measurable — and measuring it honestly is most of the work.

  • Healthcare accessibility modeling — under review at Health & Place, first author
  • Urban rail crowding optimization — in preparation for Transportation Research Part A, first author
  • A Multidimensional Diagnostic and Explanatory Framework for Social Infrastructure Accessibility Using Digital Footprint Data — CHITA 2026, Washington, DC, oral presentation
  • Analysis of Determinants of 5 Major Crimes in Seoul using Spatial Big DataJKIICE 28(4), 2024
  • Application of Geographically Weighted Principal Component Analysis to Domestic Administrative Data — KIICE Spring Conference, 2024
  • Seoul Metropolitan Government — research assistant on commissioned policy research, 2025