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Dose "alpha' make no contribution to multi_class classification?
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# Focal Loss for Dense Object Detection #
- Author: Tsung-Yi Lin, Priya Goyal, Ross Girshick, Kaiming He, Piotr Dollár
- Origin: https://arxiv.org/abs/1708.02002
- Related:
- https://github.co…
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这个focal loss做多分类语义分割需要改动吗?
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## 一言でいうと
物体検出では、物体が映りうる箇所全部を調べるとなると大半の領域には何も映っていないので、物体のある/なしのラベルに大きな偏りが生まれる。それがゆえに(経験的なルールで絞り込み、分類する2ステージに比べ)1ステージがうまくいっていないと仮定。ラベル数が多い場合に誤差の重みを調整する手法(Focal Loss)によりこの点を克服した。
### 論文リンク
http…
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### Search before asking
- [X] I have searched the YOLOv8 [issues](https://github.com/ultralytics/ultralytics/issues) and [discussions](https://github.com/ultralytics/ultralytics/discussions) and fou…
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Thanks for your released code.
When conducting experiments on the Horse scene, Francis scene and Church scene of the Tanks dataset using the default.yaml file, I found that the results were much wo…
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I'm training the segmentation EfficientViT B1 on Cityscapes, and achieving ~0.6 mIoU, however the reported results are around 0.8 mIoU.
Would you be able to offer some guidance or share more detai…
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您好:
focal_mask = alpha * tf.pow(tf.abs(object_mask - tf.sigmoid(pred_conf_logits)), gamma)
1*(label - logits)^2
是不是少计算了一个取对数log?
![8904720-ff70ec8fe128e133](https://user-images.githubuserco…
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你好,将focal loss 应用到faster rcnn中的话,应该代替的是rpn的 Cross Entropy还是RCNN的呢?目前运行得到的mAP感觉没什么变化?谢谢
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Hi,
https://github.com/DingKe/pytorch_workplace/blob/822b6d2b18bba15cc5f273e901903b7c5bdd94e8/focalloss/loss.py#L33
Here seems should be (1 - exp(log_input)), not (1 - log_input)