Sprites Video Data Generation Scripts

This repo contains scripts to generate the "Sprites" data used in the following paper:

Yingzhen Li and Stephan Mandt

Disentangled Sequential Autoencoder

International Conference on Machine Learning (ICML), 2018

The sprite sheets are collected from the following open-source projects:

Liberated Pixel Cup

Universal-LPC-spritesheet

We do NOT claim the ownership of the original sprite sheets. But if you will be using the code in this repo to generate the sprite video data, then consider citing the two original open-source projects, and our paper.

Create the dataset

You need to install python packages Pillow and imageio first. Using pip should be sufficient.

Then clone the repo to your working directory. Then first run

python random_character.py

This will create frames/ folder and generate .png files of 1296 unique characters with different actions.

Then run

python frame_to_npy.py

This will read the .png files in frames/, create path npy/, and generate numpy data files .npy.

After that if you don't want to retain the .png files, simply run

rm -rf frames/

Load the dataset

In your awesome python code, simply try

from load_sprites import sprites_act
X_train, X_test, A_train, A_test, D_train, D_test = sprites_act('npy/', return_labels=True)

Here X_train contains the video frames, represented as an numpy.array with shape (N_train, T, width, height, N_channel). A_train contains the attribute labels of shape (N_train, T, 4, 6), and D_train contains action labels of shape (N_train, T, 9).

Citing the paper (bib)

@inproceedings{li2018disentangle,
  title = {Disentangled Sequential Autoencoder},
  author = {Li, Yingzhen and Mandt, Stephan},
  booktitle = {International Conference on Machine Learning},
  year = {2018}
}