针对你遇到的错误信息 RuntimeError: sigmoid_focal_loss_forward_impl: implementation for device cuda:0 not found,我们可以从以下几个方面进行分析和解决: 1. 错误信息分析 这个错误信息表明,程序在尝试调用 sigmoid_focal_loss_forward_impl 函数时,无法在 CUDA 设备(这里是 cuda:0)上找到相应的实现。这通常意...
sigmoid_focal_loss( inputs, axis=- 1, alpha=0.25, gamma=2.0, start_index=0, reduction='valid', **kwargs)[source] Compute the focal loss of sigmoid cross entropy. [Lin et.al, 2017]. Examples: x = dragon.constant([[0.5, 0.5], [...
与上面的py_sigmoid_focal_loss函数(计算的是平均值)计算结果相同。 4.关于αtαt 因为Focal Loss的本意是将loss集中在正样本上,所以我一直以为α=0.25是负样本的权重,但是调试代码时发现0.25其实是乘在正样本上了。这是一个比较矛盾的地方,因为检测任务中负样本比正样本要多很多,而且大部分都是论文中提到过的...
This PR updates thesigmoid_focal_lossfunction to explicitly raise aValueErrorwhenalpha > 1. In the focal loss formulation,alphais meant to balance positive and negative examples and should generally lie within the range(0, 1)or be set to-1to ignore the balancing factor. Allowingalphato exceed ...
Whitespace Ignore whitespace Split Unified 188 changes: 0 additions & 188 deletions 188 maskrcnn_benchmark/csrc/SigmoidFocalLoss_cuda.cu Load diff This file was deleted. 0 comments on commit 4d1ba33 Please sign in to comment. Footer...