'Sets the default model hyperparameters.'

def __init__(self):

    self.input_file_pattern = None
    self.image_format = 'jpeg'
    self.values_per_input_shard = 2300
    self.input_queue_capacity_factor = 2
    self.num_input_reader_threads = 1
    self.image_feature_name = 'image/data'
    self.caption_feature_name = 'image/caption_ids'
    self.vocab_size = 12000
    self.num_preprocess_threads = 4
    self.batch_size = 32
    self.inception_checkpoint_file = None
    self.image_height = 299
    self.image_width = 299
    self.initializer_scale = 0.08
    self.embedding_size = 512
    self.num_lstm_units = 512
    self.lstm_dropout_keep_prob = 0.7
