Figure 1: Qualitative comparison of supervision assignment. Point2RBox-v3 (Zhang et al., 2026)
uses a shared patch-wise supervision source, while our Instance Density Calibration (IDC) and
Instance-wise Supervision Assignment (ISA) perform instance-wise source assignment between
SAM (blue) and watershed (green) supervision. Yellow boxes denote the RBoxes and white dots
denote point annotations.