Source code for mindarmour.defenses.defense

# Copyright 2019 Huawei Technologies Co., Ltd
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# See the License for the specific language governing permissions and
# limitations under the License.
Base Class of Defense.
from abc import abstractmethod

from mindarmour.utils.logger import LogUtil
from mindarmour.utils._check_param import check_pair_numpy_param, \

LOGGER = LogUtil.get_instance()
TAG = 'Defense'

[docs]class Defense: """ The abstract base class for all defense classes defending adversarial examples. Args: network (Cell): A MindSpore-style deep learning model to be defensed. """ def __init__(self, network): self._network = network
[docs] @abstractmethod def defense(self, inputs, labels): """ Defense model with samples. Args: inputs (numpy.ndarray): Samples based on which adversarial examples are generated. labels (numpy.ndarray): Labels of input samples. Raises: NotImplementedError: It is an abstract method. """ msg = 'The function defense() is an abstract function in class ' \ '`Defense` and should be implemented in child class.' LOGGER.error(TAG, msg) raise NotImplementedError(msg)
[docs] def batch_defense(self, inputs, labels, batch_size=32, epochs=5): """ Defense model with samples in batch. Args: inputs (numpy.ndarray): Samples based on which adversarial examples are generated. labels (numpy.ndarray): Labels of input samples. batch_size (int): Number of samples in one batch. epochs (int): Number of epochs. Returns: numpy.ndarray, loss of batch_defense operation. Raises: ValueError: If batch_size is 0. """ inputs, labels = check_pair_numpy_param('inputs', inputs, 'labels', labels) x_len = len(inputs) batch_size = check_int_positive('batch_size', batch_size) iters_per_epoch = int(x_len / batch_size) loss = None for _ in range(epochs): for step in range(iters_per_epoch): x_batch = inputs[step*batch_size:(step + 1)*batch_size] y_batch = labels[step*batch_size:(step + 1)*batch_size] loss = self.defense(x_batch, y_batch) return loss