import tensorflow as tf from tensorflow.keras import layers # 构建卷积神经网络模型 def cnn_model(): model = tf.keras.Sequential() model.add(layers.Conv2D(32, (3, 3), activation='relu', input_shape=(28, 28, 1))) model.add(layers.MaxPooling2D((2, 2))) model.add(layers.Conv2D(64, (3, 3), activation='relu')) model.add(layers.MaxPooling2D((2, 2))) model.add(layers.Conv2D(64, (3, 3), activation='relu')) model.add(layers.Flatten()) model.add(layers.Dense(64, activation='relu')) model.add(layers.Dense(10)) return model # 数据增强 data_augmentation = tf.keras.Sequential([ layers.experimental.preprocessing.Rescaling(1./255), layers.experimental.preprocessing.RandomRotation(0.1), layers.experimental.preprocessing.RandomZoom(0.1), ]) # 引入先验知识 def prior_knowledge_loss(y_true, y_pred): loss = ... return loss # 构建图像攻击检测模型 def attack_detection_model(): base_model = cnn_model() inp = layers.Input(shape=(28, 28, 1)) x = data_augmentation(inp) features = base_model(x) predictions = layers.Dense(1, activation='sigmoid')(features) model = tf.keras.Model(inputs=inp, outputs=predictions) model.compile(optimizer='adam', loss=[prior_knowledge_loss, 'binary_crossentropy']) return model # 训练模型 model = attack_detection_model() model.fit(train_dataset, epochs=10, validation_data=val_dataset) # 测试模型 loss, accuracy = model.evaluate(test_dataset) print('Test accuracy:', accuracy)
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