Short notice for visiters (wrote 2020.10.27)

If you get interested in this repository, I recommend you to see Nvidia's official Pytorch implementation.
https://nv-adlr.github.io/publication/partialconv-inpainting

• This repository is implemented by Chainer which is no longer supported now.
• Pytorch is a very similar framework to Chainer and is one of the major deep learning framework.

chainer-partial_convolution_image_inpainting

Reproduction of Nvidia image inpainting paper "Image Inpainting for Irregular Holes Using Partial Convolutions" https://arxiv.org/abs/1804.07723

1,000 iteration results (completion, output, mask) "completion" represents the input images whose masked pixels are replaced with the corresonded pixels of the output images

10,000 iteration results (completion, output, mask)

100,000 iteration results (completion, output, mask)

Environment

• python3.5.3
• chainer4.0alpha
• opencv (only for cv.imread, you can replace it with PIL)
• PIL

How to try

Download dataset (place2)

Place2

Set dataset path

Edit common/paths.py

train_place2 = "/yourpath/place2/data_256"
val_place2 = "/yourpath/place2/val_256"
test_place2 = "/yourpath/test_256"

Preprocessing

In this implementation, masks are automatically generated in advance.

python generate_windows.py image_size generate_num

"image_size" indicates image size of masks.
"generate_num" indicates the number of masks to generate.

Default implementation uses image_size=256 and generate_num=1000.

#To try default setting
python generate_windows.py 256 1000

Note that original paper uses 512x512 image and generate mask with different way.

Run training

python train.py -g 0 

-g represents gpu option.(utilize gpu of No.0)

Difference from original paper

Firstly, check implementation FAQ

1. C(0)=0 in first implementation (already fix in latest version)
2. Masks are generated using random walk by generate_window.py
3. To use chainer VGG pre-traied model, I re-scaled input of the model. See updater.vgg_extract. It includes cropping, so styleloss in outside of crop box is ignored.)
4. Padding is to make scale of height and width input:output=2:1 in encoder stage.
5. I use chainer.functions.unpooling_2d for upsampling. (you can replace it with chainer.functions.upsampling_2d)

other differences:

• image_size=256x256 (original: 512x512)

Acknowledgement

This repository utilizes the codes of following impressive repositories

• chainer-cyclegan