## Model Overview
StyleGAN3 pretrained models for FFHQ, AFHQv2 and MetFaces datasets.

We observe that despite their hierarchical convolutional nature, the synthesis process of typical generative adversarial networks depends on absolute pixel coordinates in an unhealthy manner. This manifests itself as, e.g., detail appearing to be glued to image coordinates instead of the surfaces of depicted objects. We trace the root cause to careless signal processing that causes aliasing in the generator network. Interpreting all signals in the network as continuous, we derive generally applicable, small architectural changes that guarantee that unwanted information cannot leak into the hierarchical synthesis process. The resulting networks match the FID of StyleGAN2 but differ dramatically in their internal representations, and they are fully equivariant to translation and rotation even at subpixel scales. Our results pave the way for generative models better suited for video and animation

## Model Architecture

You can see the details of this model on this link: https://nvlabs.github.io/stylegan3 and the related paper can be find here: https://nvlabs.github.io/stylegan3/


## Training
You can train new networks using train.py.
This release contains an interactive model visualization tool that can be used to explore various characteristics of a trained model. To start it, run:
```
python visualizer.py
```
### Dataset

FFHQ-U and MetFaces-U: We built unaligned variants of the existing FFHQ and METFACES datasets. The originals
are available at https://github.com/NVlabs/ffhq-dataset and https://github.com/NVlabs/
metfaces-dataset, respectively. The datasets were rebuilt with a modification of the original procedure
based on the original code, raw uncropped images, and facial landmark metadata. The code
required to reproduce the modified datasets is included in the public release.

AFHQv2: We used an updated version of the AFHQ dataset where the resampling filtering has been
improved. The original dataset suffers from pixel-level artifacts caused by inadequate downsampling
filters. This caused convergence problems with our models, as the sharp “stair-step” aliasing
artifacts are difficult to reproduce without direct access to the pixel grid.

## Performance
the result quality and training time depend heavily on the exact set of options. The most important ones (--gpus, --batch, and --gamma) must be specified explicitly, and they should be selected with care. See python train.py --help for the full list of options and Training configurations for general guidelines & recommendations, along with the expected training speed & memory usage in different scenarios.

The results of each training run are saved to a newly created directory, for example ~/training-runs/00000-stylegan3-t-afhqv2-512x512-gpus8-batch32-gamma8.2. The training loop exports network pickles (network-snapshot-<KIMG>.pkl) and random image grids (fakes<KIMG>.png) at regular intervals (controlled by --snap). For each exported pickle, it evaluates FID (controlled by --metrics) and logs the result in metric-fid50k_full.jsonl. It also records various statistics in training_stats.jsonl, as well as *.tfevents if TensorBoard is installed.

## How to Use this Model

Requirements:
- Linux and Windows are supported, but we recommend Linux for performance and compatibility reasons.
- 1–8 high-end NVIDIA GPUs with at least 12 GB of memory. We have done all testing and development using Tesla V100 and A100 GPUs.
- 64-bit Python 3.8 and PyTorch 1.9.0 (or later). See https://pytorch.org for PyTorch install instructions.
- CUDA toolkit 11.1 or later.
- GCC 7 or later (Linux) or Visual Studio (Windows) compilers. Recommended GCC version depends on CUDA version.


### Input

Datasets are stored as uncompressed ZIP archives containing uncompressed PNG files and a metadata file dataset.json for labels.

### Output
you can check the output of the model in the paper at this address:
https://arxiv.org/abs/2106.12423



## References

https://nvlabs.github.io/stylegan3/
https://arxiv.org/abs/2106.12423
## Licence
Copyright (C) 2021, NVIDIA Corporation & affiliates. All rights reserved.

This work is made available under the [Nvidia Source Code License](https://github.com/NVlabs/stylegan3/blob/main/LICENSE.txt).

"inception-2015-12-05.pkl" is derived from the pre-trained Inception-v3
network by Christian Szegedy, Vincent Vanhoucke, Sergey Ioffe, Jonathon
Shlens, and Zbigniew Wojna. The network was originally shared under Apache
2.0 license on the TensorFlow Models repository.

- https://arxiv.org/abs/1512.00567
- https://github.com/tensorflow/models/blob/master/LICENSE
- https://github.com/tensorflow/models

"vgg16.pkl" is derived from the pre-trained VGG-16 network by Karen Simonyan
and Andrew Zisserman. The network was originally shared under Creative
Commons BY 4.0 license on the Very Deep Convolutional Networks for
Large-Scale Visual Recognition project page.

- https://arxiv.org/abs/1409.1556
- https://creativecommons.org/licenses/by/4.0/
- http://www.robots.ox.ac.uk/~vgg/research/very_deep/

Additionally, "vgg16.pkl" incorporates the pre-trained LPIPS weights by
Richard Zhang, Phillip Isola, Alexei A. Efros, Eli Shechtman, and Oliver
Wang. The weights were originally shared under BSD 2-Clause "Simplified"
License on the PerceptualSimilarity repository.

- https://arxiv.org/abs/1801.03924
- https://github.com/richzhang/PerceptualSimilarity/blob/master/LICENSE
- https://github.com/richzhang/PerceptualSimilarity

stylegan3

StyleGAN3 pretrained models for FFHQ, AFHQv2 and MetFaces datasets.

Field	Response
Intended Application(s) & Domain(s):	Content generation (such as Adobe Photoshop) for generating images of people, animals, etc.
Model Type:	Generative Adversarial Network (GAN)
Intended Users:	Intended for reproduction of results.
Output:	Outputs image
List the steps explaining how this model works:	Recognizes different classes of objects
Name the adversely impacted groups this has been tested to deliver comparable outcomes regardless of:	Not Applicable
Technical Limitations:	Discriminator is not equivariant. Operators in sRGB color space (after tone mapping).
Performance Metrics:	Fréchet inception distance (FID)
Potential Known Risks:	None Known
Recommended Training:	https://www.nvidia.com/en-us/on-demand/session/gtcfall22-a41089/
End User License Agreement:	https://github.com/NVlabs/stylegan3/blob/main/LICENSE.txt

StyleGAN3 pretrained models

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