Course4 Week3: Understanding YOLO Algorithm

[ai_curious]

@arunnalpet

not clear on how each grid can detect an object which is larger than the grid

Applying YOLO anchor boxes

Applying YOLO Anchor Boxes A previous thread provides an introduction to extracting from labelled ground truth data a small set, on the order of 3 <= k <= 10 , of shapes for what is referred to in the YOLO 9000 paper as dimension clusters or priors, but in this class as anchor boxes . NOTE: Just to make things more confusing, the YOLO 9000 paper uses anchor boxes to refer instead to the hand-picked shapes described in the Faster R-CNN paper, not the ones generated by K-Means. The YOLO 9000 pap…

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(this works even if this results in values larger than the grid cell dimension – it is exactly the mechanism that allows YOLO to predict bounding box shapes larger than one grid cell).