Features
THRESHOLD_FALLBACKenv var sets a separate confidence threshold for whole-image fallback classifications (when YOLO finds no animal to crop), instead of sharingTHRESHOLDwith real crops. Defaults toTHRESHOLD's value, so it's a no-op unless set explicitly. The tagging accuracy tool has consistently measured the fallback path as a meaningfully noisier signal than a real crop; this lets that be corrected for in live tagging (e.g. setting it higher thanTHRESHOLD) instead of only being visible in the diagnostic.