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用全连接+softmax对图片的feature进行分类
2022-07-06 18:51:00 【子燕若水】
Softmax 将logits(多类分类神经网络的最后一个线性层的数字输出)转换为概率,方法是获取每个输出的指数,然后通过这些指数的总和对每个数字进行归一化,因此整个输出向量加起来为 1-所有概率加起来应该为 1。交叉熵损失通常是这种多类分类问题的损失函数。Softmax 经常附加到图像分类网络的最后一层,例如 ImageNet 竞赛中使用的 CNN(例如 VGG16)中的那些。
Softmax 函数在 CNN 架构中的位置。从neurohive cnn 增强的图像。如上所示,Softmax 的输入是紧接在其前面的全连接层的输出,它输出整个神经网络的最终输出。该输出是所有标签类候选的概率分布。来源 VGG16 — 用于分类和检测的卷积网络 https://neurohive.io/en/popular-networks/vgg16/
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