pytorch-zssr
Unofficial PyTorch implementation of "Zero-Shot" Super-Resolution using Deep Internal Learning
Unofficial Implementation of 1712.06087 "Zero-Shot" Super-Resolution using Deep Internal Learning by Assaf Shocher, Nadav Cohen, Michal Irani.
his trains a deep neural network to perform super resolution using a single image.
The network is not trained on additional images, and only uses information from within the target image. Pairs of high resolution and low resolution patches are sampled from the image, and the network fits their difference.
TODO:
- Implement additional augmentation using the "Geometric self ensemble" mentioned in the paper.
- Implement gradual increase of the super resolution factor as described in the paper.
- Support for arbitrary kernel estimation and sampling with arbitrary kernels. The current implementation interpolates the images bicubic interpolation.
Deviations from paper:
- Instead of fitting the loss and analyzing it's standard deviation, the network is trained for a constant number of batches. The learning rate shrinks x10 every 10,000 iterations.
Usage
Example: python train.py --img img.png
usage: train.py [-h] [--num_batches NUM_BATCHES] [--crop CROP] [--lr LR]
[--factor FACTOR] [--img IMG]
optional arguments:
-h, --help show this help message and exit
--num_batches NUM_BATCHES
Number of batches to run
--crop CROP Random crop size
--lr LR Base learning rate for Adam
--factor FACTOR Interpolation factor.
--img IMG Path to input img
