# encoding=utf-8 """ Created on 10:29 2018/12/29 @author: Jindong Wang """ import torch.nn as nn class Network(nn.Module): def __init__(self): super(Network, self).__init__() self.feature = nn.Sequential() self.feature.add_module('f_conv1', nn.Conv2d(3, 64, kernel_size=5)) self.feature.add_module('f_bn1', nn.BatchNorm2d(64)) self.feature.add_module('f_pool1', nn.MaxPool2d(2)) self.feature.add_module('f_relu1', nn.ReLU(True)) self.feature.add_module('f_conv2', nn.Conv2d(64, 50, kernel_size=5)) self.feature.add_module('f_bn2', nn.BatchNorm2d(50)) self.feature.add_module('f_drop1', nn.Dropout2d()) self.feature.add_module('f_pool2', nn.MaxPool2d(2)) self.feature.add_module('f_relu2', nn.ReLU(True)) self.class_classifier = nn.Sequential() self.class_classifier.add_module('c_fc1', nn.Linear(50 * 5 * 5, 100)) self.class_classifier.add_module('c_bn1', nn.BatchNorm1d(100)) self.class_classifier.add_module('c_relu1', nn.ReLU(True)) self.class_classifier.add_module('c_drop1', nn.Dropout2d()) self.class_classifier.add_module('c_fc2', nn.Linear(100, 500)) self.class_classifier.add_module('c_bn2', nn.BatchNorm1d(500)) self.class_classifier.add_module('c_relu2', nn.ReLU(True)) self.class_classifier.add_module('c_fc3', nn.Linear(500, 10)) def forward(self, input_data): # input_data = input_data.expand(len(input_data), 3, 28, 28) feature = self.feature(input_data) feature = feature.view(-1, 50 * 5 * 5) class_output = self.class_classifier(feature) return class_output # Exactly like forward function, but return features def get_feature(self, input_data): # input_data = input_data.expand(len(input_data), 3, 28, 28) feature = self.feature(input_data) feature = feature.view(-1, 50 * 5 * 5) fea = self.class_classifier.c_fc1(feature) fea = self.class_classifier.c_bn1(fea) fea = self.class_classifier.c_relu1(fea) fea = self.class_classifier.c_drop1(fea) fea = self.class_classifier.c_fc2(fea) fea = self.class_classifier.c_bn2(fea) fea = self.class_classifier.c_relu2(fea) return fea