how to copy & modify nets model on tensorflow slim

想要修改tensorflow-slim 中 nets中的某个model,例如明明为kk_v2.py

观察到train_image_classifier.py中调用模型的部分

network_fn = nets_factory.get_network_fn(
        FLAGS.model_name,
        num_classes=(dataset.num_classes - FLAGS.labels_offset),
        weight_decay=FLAGS.weight_decay,
        is_training=True)

调用了nets_factory.get_network_fn，get_network如下：

def get_network_fn(name, num_classes, weight_decay=0.0, is_training=False):
  """Returns a network_fn such as `logits, end_points = network_fn(images)`.

  Args:
    name: The name of the network.
    num_classes: The number of classes to use for classification.
    weight_decay: The l2 coefficient for the model weights.
    is_training: `True` if the model is being used for training and `False`
      otherwise.

  Returns:
    network_fn: A function that applies the model to a batch of images. It has
      the following signature:
        logits, end_points = network_fn(images)
  Raises:
    ValueError: If network `name` is not recognized.
  """
  if name not in networks_map:
    raise ValueError('Name of network unknown %s' % name)
  func = networks_map[name]
  @functools.wraps(func)
  def network_fn(images):
    arg_scope = arg_scopes_map[name](weight_decay=weight_decay)
    with slim.arg_scope(arg_scope):
      return func(images, num_classes, is_training=is_training)
  if hasattr(func, 'default_image_size'):
    network_fn.default_image_size = func.default_image_size

  return network_fn

我们看到model name 是通过 networks_map映射到func的

因此需要添加对于我们新的model,kk_v2的映射

networks_map = {'alexnet_v2': alexnet.alexnet_v2,
                'cifarnet': cifarnet.cifarnet,
                'overfeat': overfeat.overfeat,
                'vgg_a': vgg.vgg_a,
                'vgg_16': vgg.vgg_16,
                'vgg_19': vgg.vgg_19,
                'inception_v1': inception.inception_v1,
                'inception_v2': inception.inception_v2,
                'inception_v3': inception.inception_v3,
                'inception_v4': inception.inception_v4,
                'inception_resnet_v2': inception.inception_resnet_v2,
                'kk_v2':inception.inception_resnet_v2,
                'lenet': lenet.lenet,
                'resnet_v1_50': resnet_v1.resnet_v1_50,
                'resnet_v1_101': resnet_v1.resnet_v1_101,
                'resnet_v1_152': resnet_v1.resnet_v1_152,
                'resnet_v1_200': resnet_v1.resnet_v1_200,
                'resnet_v2_50': resnet_v2.resnet_v2_50,
                'resnet_v2_101': resnet_v2.resnet_v2_101,
                'resnet_v2_152': resnet_v2.resnet_v2_152,
                'resnet_v2_200': resnet_v2.resnet_v2_200,
                'mobilenet_v1': mobilenet_v1.mobilenet_v1,
               }

由于train_image_classifier.py中有如下参数，

tf.app.flags.DEFINE_string(
    'preprocessing_name', None, 'The name of the preprocessing to use. If left '
    'as `None`, then the model_name flag is used.'




preprocessing_name = FLAGS.preprocessing_name or FLAGS.model_name

因此还需要修改预处理的映射表

 preprocessing_fn_map = {
      'cifarnet': cifarnet_preprocessing,
      'inception': inception_preprocessing,
      'inception_v1': inception_preprocessing,
      'inception_v2': inception_preprocessing,
      'inception_v3': inception_preprocessing,
      'inception_v4': inception_preprocessing,
      'inception_resnet_v2': inception_preprocessing,
      'kk_v2': inception_preprocessing,
      'lenet': lenet_preprocessing,
      'mobilenet_v1': inception_preprocessing,
      'resnet_v1_50': vgg_preprocessing,
      'resnet_v1_101': vgg_preprocessing,
      'resnet_v1_152': vgg_preprocessing,
      'resnet_v1_200': vgg_preprocessing,
      'resnet_v2_50': vgg_preprocessing,
      'resnet_v2_101': vgg_preprocessing,
      'resnet_v2_152': vgg_preprocessing,
      'resnet_v2_200': vgg_preprocessing,
      'vgg': vgg_preprocessing,
      'vgg_a': vgg_preprocessing,
      'vgg_16': vgg_preprocessing,
      'vgg_19': vgg_preprocessing,
  }

还要修改arg_scopes_map，添加kk_v2的key

arg_scopes_map = {'alexnet_v2': alexnet.alexnet_v2_arg_scope,
                  'cifarnet': cifarnet.cifarnet_arg_scope,
                  'overfeat': overfeat.overfeat_arg_scope,
                  'vgg_a': vgg.vgg_arg_scope,
                  'vgg_16': vgg.vgg_arg_scope,
                  'vgg_19': vgg.vgg_arg_scope,
                  'inception_v1': inception.inception_v3_arg_scope,
                  'inception_v2': inception.inception_v3_arg_scope,
                  'inception_v3': inception.inception_v3_arg_scope,
                  'inception_v4': inception.inception_v4_arg_scope,
                  'inception_resnet_v2':
                  inception.inception_resnet_v2_arg_scope,
                  'kk_v2':
                  inception.inception_resnet_v2_arg_scope,
                  'lenet': lenet.lenet_arg_scope,
                  'resnet_v1_50': resnet_v1.resnet_arg_scope,
                  'resnet_v1_101': resnet_v1.resnet_arg_scope,
                  'resnet_v1_152': resnet_v1.resnet_arg_scope,
                  'resnet_v1_200': resnet_v1.resnet_arg_scope,
                  'resnet_v2_50': resnet_v2.resnet_arg_scope,
                  'resnet_v2_101': resnet_v2.resnet_arg_scope,
                  'resnet_v2_152': resnet_v2.resnet_arg_scope,
                  'resnet_v2_200': resnet_v2.resnet_arg_scope,
                  'mobilenet_v1': mobilenet_v1.mobilenet_v1_arg_scope,
                 }