focal-loss

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use to trainFasterRCNN on Detectrone2 system

2

hello thanks for implementation sharng is it possible to use your implementation in FasterRCNN in Detectrone2 object detection system? I mean to have Focal loss as loss function in FasterRCNN...

mahilaMoghadami

多分类时参数α的意义是什么？

2

二分类时，α的作用是，让数量少的类别权重增大。 那么多分类时，同理，应该为每个类别设置一个α。 一个统一的α值如何能起到这个作用呢？

ChuanTianML

@unsky 多谢多谢！

guotong1988

这种问题如何解决？

XingLiuJia

Initialization

4

What is your initialization of the detector? Is that exactly the same with original paper to set bias = -log((1-pi)/pi) or use normal softmax for several times like your previous...

GOATmessi7

我按照论文3.3进行了初始化，但是loss非常大，请问你是如何解决的呢？

Hub-Tian

你好，感谢你的代码，我很好奇如何在faster rcnn中实现focal loss ，是要把softmax换成focal loss吗？你有提供在faster rcnn中实现它的代码吗？非常感谢。

zqdeepbluesky

why CE is not this:  by my formula,derivatives is different from yours.

Tveek

Focal Loss in Keras

5

Hi, Is there any implementation of Focal Loss in Keras or an ongoing effort? I really appreciate cooperation in such a work, please e-mail me if so.

mkocabas

In the original RCNN, cfg.TRAIN.BATCH_ROIS rois are selected. Does this implementation use the same setting and just modify the cls loss? Or, much more Rois are selected, following the spirit...

ChengpengChen