- Machine Learning for Beginners: An Introduction to Neural Networks
- CNNs, Part 1: An Introduction to Convolutional Neural Networks
- CNNs, Part 2: Training a Convolutional Neural Network
- 1. Setting the Stage
- 2. Training Overview
- 3. Backprop: Softmax
- 最终的计算公式:$L=-ln(p_c)$,其中$p_c$指正确的类的预测概率
- 正常的 cross-entropy loss 公式:$L=-sum_{x} p(x) ln(q(x))$,但是里面真实值除了正确的类都是 0,所以都可以消去,真实值的 概率 为 1,所以最终结果如上
- 4. Backprop: Max Pooling
- 5. Backprop: Conv
- 6. Training a CNN
- What Now?