python类convolution2d()的实例源码

def inference(input_img):
    # input_latent = Input(batch_shape=noise_dim, dtype=im_dtype)
    with tf.variable_scope('Net_Inf') as scope:
        xx = layers.convolution2d(input_img, 128, kernel_size=(5,5), stride=(2, 2), padding='SAME', activation_fn=None)
        xx = layers.batch_norm(xx)
        xx = tf.nn.relu(xx)
        xx = layers.convolution2d(xx, 256, kernel_size=(5,5), stride=(2, 2), padding='SAME', activation_fn=None)
        xx = layers.batch_norm(xx)
        xx = tf.nn.relu(xx)    
        xx = layers.convolution2d(xx, 512, kernel_size=(5,5), stride=(2, 2),  padding='SAME', activation_fn=None)
        xx = layers.batch_norm(xx)
        xx = tf.nn.relu(xx)  
        xx = layers.flatten(xx)
        xx = layers.fully_connected(xx, num_outputs=latent_size, activation_fn=None)
        xx = layers.batch_norm(xx)
        inf_latent = tf.nn.tanh(xx)
    return inf_latent

# specify discriminative model

def BN_ReLU(self, net):
        """Batch Normalization and ReLU."""
        # 'gamma' is not used as the next layer is ReLU
        net = batch_norm(net,
                         center=True,
                         scale=False,
                         activation_fn=tf.nn.relu, )
        self._activation_summary(net)
        return net

        # def conv2d(self, net, num_ker, ker_size, stride):
        # 1D-convolution
        net = convolution2d(
            net,
            num_outputs=num_ker,
            kernel_size=[ker_size, 1],
            stride=[stride, 1],
            padding='SAME',
            activation_fn=None,
            normalizer_fn=None,
            weights_initializer=variance_scaling_initializer(),
            weights_regularizer=l2_regularizer(self.weight_decay),
            biases_initializer=tf.zeros_initializer)
        return net

def model(img_in, num_actions, scope, reuse=False):
    """As described in https://storage.googleapis.com/deepmind-data/assets/papers/DeepMindNature14236Paper.pdf"""
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        out = layers.flatten(out)

        with tf.variable_scope("action_value"):
            out = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
            out = layers.fully_connected(out, num_outputs=num_actions, activation_fn=None)

        return out

def dueling_model(img_in, num_actions, scope, reuse=False):
    """As described in https://arxiv.org/abs/1511.06581"""
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        out = layers.flatten(out)

        with tf.variable_scope("state_value"):
            state_hidden = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
            state_score = layers.fully_connected(state_hidden, num_outputs=1, activation_fn=None)
        with tf.variable_scope("action_value"):
            actions_hidden = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
            action_scores = layers.fully_connected(actions_hidden, num_outputs=num_actions, activation_fn=None)
            action_scores_mean = tf.reduce_mean(action_scores, 1)
            action_scores = action_scores - tf.expand_dims(action_scores_mean, 1)

        return state_score + action_scores

def model(img_in, num_actions, scope, reuse=False):
    """As described in https://storage.googleapis.com/deepmind-data/assets/papers/DeepMindNature14236Paper.pdf"""
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        out = layers.flatten(out)

        with tf.variable_scope("action_value"):
            out = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
            out = layers.fully_connected(out, num_outputs=num_actions, activation_fn=None)

        return out

def dueling_model(img_in, num_actions, scope, reuse=False):
    """As described in https://arxiv.org/abs/1511.06581"""
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        out = layers.flatten(out)

        with tf.variable_scope("state_value"):
            state_hidden = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
            state_score = layers.fully_connected(state_hidden, num_outputs=1, activation_fn=None)
        with tf.variable_scope("action_value"):
            actions_hidden = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
            action_scores = layers.fully_connected(actions_hidden, num_outputs=num_actions, activation_fn=None)
            action_scores_mean = tf.reduce_mean(action_scores, 1)
            action_scores = action_scores - tf.expand_dims(action_scores_mean, 1)

        return state_score + action_scores

def model(img_in, num_actions, scope, reuse=False, concat_softmax=False):
    """As described in https://storage.googleapis.com/deepmind-data/assets/papers/DeepMindNature14236Paper.pdf"""
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        out = layers.flatten(out)

        with tf.variable_scope("action_value"):
            out = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
            out = layers.fully_connected(out, num_outputs=num_actions, activation_fn=None)
            if concat_softmax:
                out = tf.nn.softmax(out)

        return out

def dueling_model(img_in, num_actions, scope, reuse=False):
    """As described in https://arxiv.org/abs/1511.06581"""
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        out = layers.flatten(out)

        with tf.variable_scope("state_value"):
            state_hidden = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
            state_score = layers.fully_connected(state_hidden, num_outputs=1, activation_fn=None)
        with tf.variable_scope("action_value"):
            actions_hidden = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
            action_scores = layers.fully_connected(actions_hidden, num_outputs=num_actions, activation_fn=None)
            action_scores_mean = tf.reduce_mean(action_scores, 1)
            action_scores = action_scores - tf.expand_dims(action_scores_mean, 1)

        return state_score + action_scores

def model(img_in, num_actions, scope, reuse=False, layer_norm=False):
    """As described in https://storage.googleapis.com/deepmind-data/assets/papers/DeepMindNature14236Paper.pdf"""
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        conv_out = layers.flatten(out)

        with tf.variable_scope("action_value"):
            value_out = layers.fully_connected(conv_out, num_outputs=512, activation_fn=None)
            if layer_norm:
                value_out = layer_norm_fn(value_out, relu=True)
            else:
                value_out = tf.nn.relu(value_out)
            value_out = layers.fully_connected(value_out, num_outputs=num_actions, activation_fn=None)
        return value_out

def model(img_in, num_actions, scope, reuse=False):
    """As described in https://storage.googleapis.com/deepmind-data/assets/papers/DeepMindNature14236Paper.pdf"""
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        out = layers.flatten(out)

        with tf.variable_scope("action_value"):
            out = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
            out = layers.fully_connected(out, num_outputs=num_actions, activation_fn=None)

        return out

def dueling_model(img_in, num_actions, scope, reuse=False):
    """As described in https://arxiv.org/abs/1511.06581"""
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        out = layers.flatten(out)

        with tf.variable_scope("state_value"):
            state_hidden = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
            state_score = layers.fully_connected(state_hidden, num_outputs=1, activation_fn=None)
        with tf.variable_scope("action_value"):
            actions_hidden = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
            action_scores = layers.fully_connected(actions_hidden, num_outputs=num_actions, activation_fn=None)
            action_scores_mean = tf.reduce_mean(action_scores, 1)
            action_scores = action_scores - tf.expand_dims(action_scores_mean, 1)

        return state_score + action_scores

def Actor(img_in, num_actions, scope, reuse=False):
    """As described in https://storage.googleapis.com/deepmind-data/assets/papers/DeepMindNature14236Paper.pdf"""
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        out = layers.flatten(out)

        with tf.variable_scope("action_value"):
            out = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
            out = layers.fully_connected(out, num_outputs=num_actions, activation_fn=None)

        with tf.variable_scope("action_prob"):
            out = tf.nn.softmax(out)
        return out

def Critic(img_in, scope, reuse=False):
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        out = layers.flatten(out)

        with tf.variable_scope("state_value"):
            out = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
            out = layers.fully_connected(out, num_outputs=1, activation_fn=None)

        return out




# models defined in the original code

def discriminator_stego_nn(self, img, batch_size, name):
        eve_input = self.image_processing_layer(img)
        eve_conv1 = convolution2d(eve_input, 64, kernel_size = [5, 5], stride = [2,2],
        activation_fn= tf.nn.relu, normalizer_fn = BatchNorm, scope = 'eve/' + name + '/conv1')

        eve_conv2 = convolution2d(eve_conv1, 64 * 2, kernel_size = [5, 5], stride = [2,2],
        activation_fn= tf.nn.relu, normalizer_fn = BatchNorm, scope = 'eve/' + name + '/conv2')

        eve_conv3 = convolution2d(eve_conv2, 64 * 4,kernel_size = [5, 5], stride = [2,2],
        activation_fn= tf.nn.relu, normalizer_fn = BatchNorm, scope = 'eve/' + name + '/conv3')

        eve_conv4 = convolution2d(eve_conv3, 64* 8, kernel_size = [5, 5], stride = [2,2],
        activation_fn= tf.nn.relu, normalizer_fn = BatchNorm, scope = 'eve/' + name + '/conv4')

        eve_conv4 = tf.reshape(eve_conv4, [batch_size, -1])

        #eve_fc = fully_connected(eve_conv4, 1, activation_fn = tf.nn.sigmoid, normalizer_fn = BatchNorm,
        #weights_initializer=tf.random_normal_initializer(stddev=1.0))
        eve_fc = fully_connected(eve_conv4, 1, normalizer_fn = BatchNorm, 
        weights_initializer=tf.random_normal_initializer(stddev=1.0), scope = 'eve' + name + '/final_fc')
        return eve_fc

def model(img_in, num_actions, scope, noisy=False, reuse=False):
    """As described in https://storage.googleapis.com/deepmind-data/assets/papers/DeepMindNature14236Paper.pdf"""
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        out = layers.flatten(out)

        with tf.variable_scope("action_value"):
            if noisy:
                # Apply noisy network on fully connected layers
                # ref: https://arxiv.org/abs/1706.10295
                out = noisy_dense(out, name='noisy_fc1', size=512, activation_fn=tf.nn.relu)
                out = noisy_dense(out, name='noisy_fc2', size=num_actions)
            else:
                out = layers.fully_connected(out, num_outputs=512, activation_fn=tf.nn.relu)
                out = layers.fully_connected(out, num_outputs=num_actions, activation_fn=None)

        return out

def testDynamicOutputSizeWithRateOneValidPadding(self):
    num_filters = 32
    input_size = [5, 9, 11, 3]
    expected_size = [None, None, None, num_filters]
    expected_size_dynamic = [5, 7, 9, num_filters]

    with self.test_session():
      images = array_ops.placeholder(np.float32,
                                     [None, None, None, input_size[3]])
      output = layers_lib.convolution2d(
          images, num_filters, [3, 3], rate=1, padding='VALID')
      variables_lib.global_variables_initializer().run()
      self.assertEqual(output.op.name, 'Conv/Relu')
      self.assertListEqual(output.get_shape().as_list(), expected_size)
      eval_output = output.eval({images: np.zeros(input_size, np.float32)})
      self.assertListEqual(list(eval_output.shape), expected_size_dynamic)

def testDynamicOutputSizeWithRateOneValidPaddingNCHW(self):
    if test.is_gpu_available(cuda_only=True):
      num_filters = 32
      input_size = [5, 3, 9, 11]
      expected_size = [None, num_filters, None, None]
      expected_size_dynamic = [5, num_filters, 7, 9]

      with self.test_session(use_gpu=True):
        images = array_ops.placeholder(np.float32,
                                       [None, input_size[1], None, None])
        output = layers_lib.convolution2d(
            images,
            num_filters, [3, 3],
            rate=1,
            padding='VALID',
            data_format='NCHW')
        variables_lib.global_variables_initializer().run()
        self.assertEqual(output.op.name, 'Conv/Relu')
        self.assertListEqual(output.get_shape().as_list(), expected_size)
        eval_output = output.eval({images: np.zeros(input_size, np.float32)})
        self.assertListEqual(list(eval_output.shape), expected_size_dynamic)

def testDynamicOutputSizeWithRateTwoValidPadding(self):
    num_filters = 32
    input_size = [5, 9, 11, 3]
    expected_size = [None, None, None, num_filters]
    expected_size_dynamic = [5, 5, 7, num_filters]

    with self.test_session():
      images = array_ops.placeholder(np.float32,
                                     [None, None, None, input_size[3]])
      output = layers_lib.convolution2d(
          images, num_filters, [3, 3], rate=2, padding='VALID')
      variables_lib.global_variables_initializer().run()
      self.assertEqual(output.op.name, 'Conv/Relu')
      self.assertListEqual(output.get_shape().as_list(), expected_size)
      eval_output = output.eval({images: np.zeros(input_size, np.float32)})
      self.assertListEqual(list(eval_output.shape), expected_size_dynamic)

def testWithScopeWithoutActivation(self):
    num_filters = 32
    input_size = [5, 9, 11, 3]
    expected_size = [5, 5, 7, num_filters]

    images = random_ops.random_uniform(input_size, seed=1)
    output = layers_lib.convolution2d(
        images,
        num_filters, [3, 3],
        rate=2,
        padding='VALID',
        activation_fn=None,
        scope='conv7')
    with self.test_session() as sess:
      sess.run(variables_lib.global_variables_initializer())
      self.assertEqual(output.op.name, 'conv7/BiasAdd')
      self.assertListEqual(list(output.eval().shape), expected_size)

def _cnn_to_mlp(convs, hiddens, dueling, inpt, num_actions, scope, reuse=False):
    with tf.variable_scope(scope, reuse=reuse):
        out = inpt
        with tf.variable_scope("convnet"):
            for num_outputs, kernel_size, stride in convs:
                out = layers.convolution2d(out,
                                           num_outputs=num_outputs,
                                           kernel_size=kernel_size,
                                           stride=stride,
                                           activation_fn=tf.nn.relu)
        out = layers.flatten(out)
        with tf.variable_scope("action_value"):
            action_out = out
            for hidden in hiddens:
                action_out = layers.fully_connected(action_out, num_outputs=hidden, activation_fn=tf.nn.relu)
            action_scores = layers.fully_connected(action_out, num_outputs=num_actions, activation_fn=None)

        if dueling:
            with tf.variable_scope("state_value"):
                state_out = out
                for hidden in hiddens:
                    state_out = layers.fully_connected(state_out, num_outputs=hidden, activation_fn=tf.nn.relu)
                state_score = layers.fully_connected(state_out, num_outputs=1, activation_fn=None)
            action_scores_mean = tf.reduce_mean(action_scores, 1)
            action_scores_centered = action_scores - tf.expand_dims(action_scores_mean, 1)
            return state_score + action_scores_centered
        else:
            return action_scores
        return out

def register_conv_layer_functions(name, f):
    explanation = """and the keyword argument `activation_fn` is set to `tf.nn.{0}`.""".format(name)

    @TensorBuilder.Register1("tf.contrib.layers", name + "_conv2d_layer", wrapped=convolution2d, explanation=explanation) #, _return_type=TensorBuilder)
    def layer_function(*args, **kwargs):
        kwargs['activation_fn'] = f
        return convolution2d(*args, **kwargs)

def atari_model(img_in, num_actions, scope, reuse=False):
    # as described in https://storage.googleapis.com/deepmind-data/assets/papers/DeepMindNature14236Paper.pdf
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        out = layers.flatten(out)
        with tf.variable_scope("action_value"):
            out = layers.fully_connected(out, num_outputs=512,         activation_fn=tf.nn.relu)
            out = layers.fully_connected(out, num_outputs=num_actions, activation_fn=None)

        return out

def simple_model(img_in, num_actions, scope, reuse=False, num_filters=64):
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        gauss_initializer = initializers.xavier_initializer(uniform=False)  # stddev = 1/n
        with tf.variable_scope("convnet"):
            out = layers.convolution2d(
                out, num_outputs=num_filters, kernel_size=8, stride=4,
                activation_fn=tf.nn.relu, weights_initializer=gauss_initializer,
                trainable=False)
        out = layers.flatten(out)
        with tf.variable_scope("action_value"):
            out = layers.fully_connected(out, num_outputs=num_actions, activation_fn=None)

        return out

def _cnn_to_mlp(convs, hiddens, dueling, inpt, num_actions, scope, reuse=False):
    with tf.variable_scope(scope, reuse=reuse):
        out = inpt
        with tf.variable_scope("convnet"):
            for num_outputs, kernel_size, stride in convs:
                out = layers.convolution2d(out,
                                           num_outputs=num_outputs,
                                           kernel_size=kernel_size,
                                           stride=stride,
                                           activation_fn=tf.nn.relu)
        out = layers.flatten(out)
        with tf.variable_scope("action_value"):
            action_out = out
            for hidden in hiddens:
                action_out = layers.fully_connected(action_out, num_outputs=hidden, activation_fn=tf.nn.relu)
            action_scores = layers.fully_connected(action_out, num_outputs=num_actions, activation_fn=None)

        if dueling:
            with tf.variable_scope("state_value"):
                state_out = out
                for hidden in hiddens:
                    state_out = layers.fully_connected(state_out, num_outputs=hidden, activation_fn=tf.nn.relu)
                state_score = layers.fully_connected(state_out, num_outputs=1, activation_fn=None)
            action_scores_mean = tf.reduce_mean(action_scores, 1)
            action_scores_centered = action_scores - tf.expand_dims(action_scores_mean, 1)
            return state_score + action_scores_centered
        else:
            return action_scores
        return out

def _cnn_to_mlp(convs, hiddens, dueling, inpt, num_actions, scope, reuse=False):
    with tf.variable_scope(scope, reuse=reuse):
        out = inpt
        with tf.variable_scope("convnet"):
            for num_outputs, kernel_size, stride in convs:
                out = layers.convolution2d(out,
                                           num_outputs=num_outputs,
                                           kernel_size=kernel_size,
                                           stride=stride,
                                           activation_fn=tf.nn.relu)
        out = layers.flatten(out)
        with tf.variable_scope("action_value"):
            action_out = out
            for hidden in hiddens:
                action_out = layers.fully_connected(action_out, num_outputs=hidden, activation_fn=tf.nn.relu)
            action_scores = layers.fully_connected(action_out, num_outputs=num_actions, activation_fn=None)

        if dueling:
            with tf.variable_scope("state_value"):
                state_out = out
                for hidden in hiddens:
                    state_out = layers.fully_connected(state_out, num_outputs=hidden, activation_fn=tf.nn.relu)
                state_score = layers.fully_connected(state_out, num_outputs=1, activation_fn=None)
            action_scores_mean = tf.reduce_mean(action_scores, 1)
            action_scores_centered = action_scores - tf.expand_dims(action_scores_mean, 1)
            return state_score + action_scores_centered
        else:
            return action_scores
        return out

def dueling_model(img_in, num_actions, scope, reuse=False, layer_norm=False):
    """As described in https://arxiv.org/abs/1511.06581"""
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        conv_out = layers.flatten(out)

        with tf.variable_scope("state_value"):
            state_hidden = layers.fully_connected(conv_out, num_outputs=512, activation_fn=None)
            if layer_norm:
                state_hidden = layer_norm_fn(state_hidden, relu=True)
            else:
                state_hidden = tf.nn.relu(state_hidden)
            state_score = layers.fully_connected(state_hidden, num_outputs=1, activation_fn=None)
        with tf.variable_scope("action_value"):
            actions_hidden = layers.fully_connected(conv_out, num_outputs=512, activation_fn=None)
            if layer_norm:
                actions_hidden = layer_norm_fn(actions_hidden, relu=True)
            else:
                actions_hidden = tf.nn.relu(actions_hidden)
            action_scores = layers.fully_connected(actions_hidden, num_outputs=num_actions, activation_fn=None)
            action_scores_mean = tf.reduce_mean(action_scores, 1)
            action_scores = action_scores - tf.expand_dims(action_scores_mean, 1)
        return state_score + action_scores

def _cnn_to_mlp(convs, hiddens, dueling, inpt, num_actions, scope, reuse=False, layer_norm=False):
    with tf.variable_scope(scope, reuse=reuse):
        out = inpt
        with tf.variable_scope("convnet"):
            for num_outputs, kernel_size, stride in convs:
                out = layers.convolution2d(out,
                                           num_outputs=num_outputs,
                                           kernel_size=kernel_size,
                                           stride=stride,
                                           activation_fn=tf.nn.relu)
        conv_out = layers.flatten(out)
        with tf.variable_scope("action_value"):
            action_out = conv_out
            for hidden in hiddens:
                action_out = layers.fully_connected(action_out, num_outputs=hidden, activation_fn=None)
                if layer_norm:
                    action_out = layers.layer_norm(action_out, center=True, scale=True)
                action_out = tf.nn.relu(action_out)
            action_scores = layers.fully_connected(action_out, num_outputs=num_actions, activation_fn=None)

        if dueling:
            with tf.variable_scope("state_value"):
                state_out = conv_out
                for hidden in hiddens:
                    state_out = layers.fully_connected(state_out, num_outputs=hidden, activation_fn=None)
                    if layer_norm:
                        state_out = layers.layer_norm(state_out, center=True, scale=True)
                    state_out = tf.nn.relu(state_out)
                state_score = layers.fully_connected(state_out, num_outputs=1, activation_fn=None)
            action_scores_mean = tf.reduce_mean(action_scores, 1)
            action_scores_centered = action_scores - tf.expand_dims(action_scores_mean, 1)
            q_out = state_score + action_scores_centered
        else:
            q_out = action_scores
        return q_out

def model(H, x, training):
  net = dropout(x, 0.5, is_training = training)
  # net = conv2d(net, 64, [3, 3], activation_fn = tf.nn.relu)
  # net = conv2d(net, 64, [3, 3], activation_fn = tf.nn.relu)
  # net = max_pool2d(net, [2, 2], padding = 'VALID')
  # net = conv2d(net, 128, [3, 3], activation_fn = tf.nn.relu)
  # net = conv2d(net, 128, [3, 3], activation_fn = tf.nn.relu)
  # net = max_pool2d(net, [2, 2], padding = 'VALID')
  # ksize = net.get_shape().as_list()
  # net = max_pool2d(net, [ksize[1], ksize[2]])
  net = fully_connected(flatten(net), 256, activation_fn = tf.nn.relu)
  net = dropout(net, 0.5, is_training = training)
  logits = fully_connected(net, 1, activation_fn = tf.nn.sigmoid)
  preds = tf.cast(tf.greater(logits, 0.5), tf.int64)
  return logits, preds

def atari_model(img_in, num_actions, scope, reuse=False):
    # as described in https://storage.googleapis.com/deepmind-data/assets/papers/DeepMindNature14236Paper.pdf
    with tf.variable_scope(scope, reuse=reuse):
        out = img_in
        with tf.variable_scope("convnet"):
            # original architecture
            out = layers.convolution2d(out, num_outputs=32, kernel_size=8, stride=4, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=4, stride=2, activation_fn=tf.nn.relu)
            out = layers.convolution2d(out, num_outputs=64, kernel_size=3, stride=1, activation_fn=tf.nn.relu)
        out = layers.flatten(out)
        with tf.variable_scope("action_value"):
            out = layers.fully_connected(out, num_outputs=512,         activation_fn=tf.nn.relu)
            out = layers.fully_connected(out, num_outputs=num_actions, activation_fn=None)

        return out

def get_network(self, input_tensor, is_training):
        # Load pre-trained inception-resnet model
        with slim.arg_scope(inception_resnet_v2_arg_scope(batch_norm_decay = 0.999, weight_decay = 0.0001)):
            net, end_points = inception_resnet_v2(input_tensor, is_training = is_training)

        # Adding some modification to original InceptionResnetV2 - changing scoring of AUXILIARY TOWER
        weight_decay = 0.0005
        with tf.variable_scope('NewInceptionResnetV2'):
            with tf.variable_scope('AuxiliaryScoring'):
                with slim.arg_scope([layers.convolution2d, layers.convolution2d_transpose],
                                    weights_regularizer = slim.l2_regularizer(weight_decay),
                                    biases_regularizer = slim.l2_regularizer(weight_decay),
                                    activation_fn = None):
                    tf.summary.histogram('Last_layer/activations', net, [KEY_SUMMARIES])

                    # Scoring
                    net = slim.dropout(net, 0.7, is_training = is_training, scope = 'Dropout')
                    net = layers.convolution2d(net, num_outputs = self.FEATURES, kernel_size = 1, stride = 1,
                                               scope = 'Scoring_layer')
                    feature = net
                    tf.summary.histogram('Scoring_layer/activations', net, [KEY_SUMMARIES])

                    # Upsampling
                    net = layers.convolution2d_transpose(net, num_outputs = 16, kernel_size = 17, stride = 17,
                                                         padding = 'VALID', scope = 'Upsampling_layer')

                    tf.summary.histogram('Upsampling_layer/activations', net, [KEY_SUMMARIES])

            # Smoothing layer - separable gaussian filters
            net = super()._get_gauss_smoothing_net(net, size = self.SMOOTH_SIZE, std = 1.0, kernel_sum = 0.2)

            return net, feature