Question 1: Short answer
mediumAI-checkedSegmentationA 3-class segmentation model is evaluated on 120 pixels. Entry counts the pixels of true class (row) that were predicted as class (column).
| true \ predicted | background | cat | dog |
|---|---|---|---|
| background | 50 | 6 | 4 |
| cat | 5 | 21 | 4 |
| dog | 3 | 7 | 20 |
What is the mean IoU, the intersection over union averaged over the three classes?