backend/config.py - Added MIN_AUTO_MATCH_FACE_SIZE_RATIO = 0.005
backend/services/face_service.py - Multiple changes:
Added load_face_encoding() function (supports float32 and float64)
Added _calculate_face_size_ratio() function
Updated find_similar_faces() to filter small faces
Updated find_auto_match_matches() to exclude small reference faces
Fixed reference face quality calculation (use actual quality, not hardcoded 0.5)
Fixed duplicate detection (exclude faces from same photo)
Updated confidence threshold from 40% to 50%
Updated confidence calibration (moderate version)
backend/api/faces.py - Updated default tolerance to 0.5 for auto-match endpoints
backend/schemas/faces.py - Updated default tolerance to 0.5
admin-frontend/src/pages/AutoMatch.tsx - Updated default tolerance to 0.5
admin-frontend/src/api/faces.ts - Added tolerance parameter support