YOLO（You Only Look Once ），创造性的将物体检测任务直接当作回归问题来处理，将候选区和检测两个阶段合二为一。目前YOLO版本已经更新到YOLO7，另外还有许多YOLO变种。

YOLO1

论文：You Only Look Once: Unified, Real-Time Object Detection

YOLO2

论文：YOLO9000: Better, Faster, Stronger

YOLO3

论文：YOLOv3: An Incremental Improvement

YOLO4

论文：YOLOv4: Optimal Speed and Accuracy of Object Detection

YOLO5

论文：YOLOv5 Source

YOLO6

论文：YOLOv6: A Single-Stage Object Detection Framework for Industrial Applications

YOLO7

论文：YOLOv7: Trainable bag-of-freebies sets new state-of-the-art for real-time object detectors