Image captioning

End-to-end image captioning with ResNet50 + LSTM with Attention

Model is seq2seq model. In the encoder pretrained ResNet50 model is used to extract the features. Decoder is the LSTM with the Bahdanau Attention.

Dataset

The dataset is available at kaggle and contains 8,000 images that are each paired with five different captions.

Usage

run in terminal: python -m img_caption

Config

The user interface consists of file:

• config.yaml - general configuration with data and model parameters

Default config.yaml:

data:
  path_to_data_folder: "data"
  caption_file_name: "captions.txt"
  images_folder_name: "Images"
  output_folder_name: "output"
  logging_file_name: "logging.txt"
  model_file_name: "model.pt"

batch_size: 32
num_worker: 1
gensim_model_name: "glove-wiki-gigaword-200"

model:
  embedding_dimension: 200
  decoder_hidden_dimension: 300
  learning_rate: 0.0001
  momentum: 0.9
  n_epochs: 50
  clip: 5
  fine_tune_encoder: false

Output

After training the model, the pipeline will return the following files:

• model.pt - checkpoint with:
  • epoch - last epoch
  • model_state_dict - model parameters
  • optimizer_state_dict - the state of the optimizer
  • train_history - training history from a model
  • valid_history - validation history from a model
  • best_valid_loss - the best validation loss