Sungjoon Choi

When Visual Diversity Is Not Supervision Diversity: Diagnosing Localization-Label Collapse and Persistent Synthetic-to-Real Failure in Construction Object Detection

Generative synthetic imagery can broaden visual coverage while still providing invalid or incomplete supervision to an object detector. This study revisits a failed synthetic-data pipeline for pile detection and tests whether severe localization-label collapse was sufficient to explain its synthetic-to-real transfer fa...