乾明 发自 凹非寺
量子位 出品 | 公众号 QbitAI

A bunch of strange websites have appeared on the Internet, with pictures of cats, waifu (female anime characters, referring to wives) , people and rooms.

They have one thing in common: no one has ever seen them, nor does anyone know where they come from or what they are called.

Because they are all fake and do not exist.

Every time you refresh, these photos disappear and other photos appear.

There are two special websites among them. They do not require you to refresh manually, but will refresh automatically after 10 seconds.

These pictures on the website are all made with NVIDIA's StyleGAN. Since its birth, various "gods" have had a lot of fun playing with it and made various pictures generated by it into websites.

An enthusiastic guy named "Paul Bricman" collected these websites together and put them on GitHub.

With the current enthusiasm for StyleGAN, there may be more and more websites like this, and you may see more and more things that don’t exist.

Next, let’s start with meow and browse these websites together.

This cat does not exist

thiscatdoesnotexist.com

Every time the game refreshes, a cat disappears and a cat appears, and this cycle continues endlessly.

If you see your pet appear in there, don't panic, it may be the reincarnation of Schrödinger's cat.

Refreshing one cat at a time, those irritable cat lovers are getting impatient.

So, there is an upgraded version of the website. Every time you refresh it, more than 50 cats disappear and more than 50 cats appear.

thesecatsdonotexist.com

This waifu does not exist

thiswaifudoesnotexist.net

You may have guessed that the website that doesn't allow you to refresh manually is this one.

A colleague next to me stared at it for a long time and said, this website gives you a new waifu every second.

But she might be hallucinating; it takes about 10 seconds for the website to refresh.

After 10 seconds, one waifu disappears and a new waifu appears.

Not satisfied with just one?

And there are these non-existent websites of waifu…

https://www.obormot.net/demos/these-waifus-do-not-exist

You don’t need to do anything for this, it will automatically “flip the card”.

Friendly reminder: For better viewing experience, the bigger the screen, the better.

This person does not exist

thispersondoesnotexist.com

Every time this website is refreshed, a realistic face disappears and a realistic face appears, but he does not exist in this world.

A foreign netizen posted that he actually appeared on this website.

She said that one afternoon when she had nothing to do, she was browsing the website over and over again, and suddenly she realized that the face on the screen was exactly the same as hers, even the moles on her face were the same.

She was so scared that she went to the living room to find her boyfriend, but he was with another girl and didn't notice her at all.

In the comments, someone said that he saw his cousin, and then someone said that his cousin had passed away five years ago, and then his cousin appeared in the comment section...

In addition to these contents, there are also -

This room does not exist

https://thisairbnbdoesnotexist.com/

This site is much more informative than cats, waifu, and people.

Not only are there multiple pictures at a time for a refresh, but there is also information about those rooms.

For example, there are room descriptions, landlord names and photos, and some hyperlinks. But these hyperlinks are exposed immediately because they don't work when you click on them. After all, they don't exist.

The generative model of text content is mainly based on Tensorflow's "Predict Shakespeare with Cloud TPU" example. The training dataset comes from OpenDataSoft's Airbnb list data, which contains nearly 500,000 records.

Glory to Nvidia

StyleGAN is the latest research result released by NVIDIA at the end of 2018 and was officially named not long ago.

Moreover, NVIDIA officially open-sourced the code.

It can run on Linux or Windows, but considering performance and compatibility, I strongly recommend that you run it on Linux.

In addition, it requires Python 3.6 and TensorFlow 1.10 or above (with GPU support).

The official code was released with the Flickr high-definition face dataset. The realistic faces were generated by StyleGAN using this dataset.

The dataset contains 70,000 1024×1024 high-definition portraits. Nvidia said that these photos have strong diversity in age, race, and picture background.

If you want to try it yourself, here is the link.

Portal

Code implementation:
https://github.com/NVlabs/stylegan

FFHQ dataset:
https://github.com/NVlabs/ffhq-dataset

Paper:
https://arxiv.org/abs/1812.04948

One more thing

If you want to experience it, these small websites above can also be opened on your mobile phone.

But these generated photos are sometimes very strange.

This is a cat:

This is waifu:

one person:

However, compared with these, what you need to be most careful about is yourself.

Maybe, you are also fake and don’t exist.