Pytorch-UNet

Customized implementation of the U-Net in Pytorch for Kaggle's Carvana Image Masking Challenge, with only 1 output class, from a high definition image.

This model scored a dice coefficient of 0.988423 (511 out of 735), which is bad but could be improved with more training, data augmentation, fine tuning, and playing with CRF post-processing.

The model used for the last submission is stored in the MODEL.pth file, if you wish to play with it. The data is available on the Kaggle website.

Usage

Prediction

You can easily test the output masks on your images via the CLI. To see all options: python predict.py -h

To predict a single image and save it:

python predict.py -i image.jpg -o ouput.jpg

To predict a multiple images and show them without saving them:

python predict.py -i image1.jpg image2.jpg --viz --no-save

You can use the cpu-only version with --cpu.

You can specify which model file to use with --model MODEL.pth.

Warning

In order to process the image, it is splitted into two squares (a left on and a right one), and each square is passed into the net. The two square masks are then merged again to produce the final image. As a consequence, the height of the image must be strictly superior than half the width. Make sure the width is even too.

Dependencies

This package depends on pydensecrf, available via pip install.