Faster R-CNN: Intersection over Union
Beginner
The problem, from first principles
Faster R-CNN (Ren et al., 2015) proposes regions, then classifies and refines them. Intersection over union measures how well a proposal overlaps a ground-truth box, and it drives both training labels and the removal of duplicate detections.
From theory to code
Implement iou(a, b), the ratio of the overlap area to the combined area of two boxes.
Constraints
- Boxes are
[x1, y1, x2, y2].
Hints
Hint 1
Find the intersection rectangle; if it is empty the overlap is zero. Divide the intersection area by the sum of the two areas minus the intersection.
Keywords
research-paperscomputer-visiondetectionobject-detection
Python
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