An unofficial implementation of MemoPainter described in the paper using PyTorch.

• Coloring With Limited Data: Few-shot Colorization via Memory Augmented Networks

Published in CVPR 2019, written by S. Yoo, H. Bahng, S. Chung, J. Lee, J. Chang and J. Choo

• Python 3.6.5
• PyTorch 1.1.0
• Pillow 5.1.0
• numpy 1.14.5
• scikit-image 0.15.0
• scikit-learn 0.19.0
• colorthief 0.2.1

• Oxford102
• Pokemon (For one-shot colorization)
• Superhero (For few-shot colorization) I crawled images from the internet.

• FlowerColorizationModel (Color_feature : RGB colors extracted by ColorThief)

• PokemonColorizationModel (Color_feature : Color distribution)

All recommeded values for configurations are based on paper and supplementary material.

1. --color_info : Should be 'RGB' or 'dist'. What you want to use as a color information for color feature.

2. --color_feat_dim : If you use RGB color information, the option should be 30. If you use color distribution as a color information, the option should be 313.

3. --mem_size : The memory size. It is remmended to set the memory size to 1.2 times the size of training set.

4. --top_k : The parameter for computing the kNN with respect to cosine similarity. It is recommended to set --top_k to 32, if you use RGB color_info. If you use color distribution as color feature, to setting --top_k to 256 is recommended.

If you refer to run.sh in my repository, you can know how to train and test.

Experimental results on Oxford102 dataset.

I randomly split the oxford102 dataset into a training set(80%) and a test set(20%)

You can download full experimental results on my oxford102 test set. Link

Input	Result	Ground Truth

Experimental results on Pokemon data. Test images are crawled from the internet

Input	Result	Ground Truth

Experimental results on Superhero data. Train images and test images are crawled from the internet.

Input	Result	Ground Truth

If you have any questions or comments on my codes, please email to me. [email protected]

[1]. https://github.com/awesome-davian/Text2Colors

• The most parts of discriminator.py are borrowed from [1]

[2]. https://github.com/nilboy/colorization-tf

• The parts for quantizing ab values into 313 color bins are borrowed from [2]

[3]. https://github.com/NVlabs/MUNIT

[4]. https://github.com/RUSH-LAB/LSH_Memory