Layer | T = 20% | T = 30% | T = 40% | T = 50% | T = 60% | T = 70% | T = 80% |
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layer1_2_conv2 | 0.20 | 9.90 | 18.41 | 26.08 | 37.53 | 18.55 | 18.55 |
layer2_0_conv2 | 3.81 | 19.86 | 31.53 | 44.90 | 68.11 | 18.55 | 18.55 |
layer3_1_conv2 | 1.77 | 9.59 | 18.92 | 28.22 | 41.59 | 18.55 | 18.55 |
layer4_1_conv3 | 0.15 | 10.26 | 15.43 | 21.10 | 29.68 | 18.55 | 18.55 |
- The layer is used to generate the heatmaps and the threshold T is used to binarize the heatmaps (e.g., \(T=20\%\) means that only pixels with values at least \(20\%\) of the max pixel value in the image are included in the binary mask). The layers were sampled to include a low-level layer (layer1_2_conv2), a high-level layer (layer4_1_conv3) and two intermediate layers (layer2_0_conv2 and layer3_1_conv2) that showed good results based on a qualitative inspection of the maps. The threshold T is varied from \(20\%\) to \(80\%\) in increments of 10. The best result and the corresponding layer and threshold are highlighted in bold font