Supervision

Supervision, from Roboflow, is an open-source Python library of reusable computer vision utilities that sit around whatever detection or segmentation model you already run. It converts predictions from Ultralytics YOLO, Hugging Face Transformers, MMDetection, SAM, and other frameworks into a common Detections object, then layers on the pieces most vision applications need: configurable annotators for boxes, masks, and labels, object tracking, polygon zone counting, line crossing detection, heatmaps, and speed estimation. A dataset API loads, splits, merges, and converts data across YOLO, COCO, and Pascal VOC formats. Requiring Python 3.10 or newer and installable with pip, the MIT-licensed library is meant to eliminate the glue code that otherwise gets rewritten for every project, and it shows up in production systems from retail analytics to traffic monitoring as well as in prototypes and tutorials built by computer vision engineers.