YOLO: Assigning an Object to a Grid Cell
Beginner
The problem, from first principles
YOLO (Redmon et al., 2016) divides the image into an S by S grid. The cell that contains an object's centre is responsible for predicting it, so each object has exactly one responsible cell.
From theory to code
Implement cell_index(x, y, img, S), returning the grid cell that contains the object centre.
Constraints
- Coordinates on the far edge belong to the last cell.
Hints
Hint 1
Scale the coordinate to grid units, floor it, and clamp to S - 1.
Keywords
research-paperscomputer-visiondetectionobject-detection
Python
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