It's a real shame Google isn't more transparent about how it actually works, and doesn't provide any mechanism for classifying images in bulk or offline.

This is the best SynthID write-up I've found so far: https://fyx.me/articles/attempting-model-extraction-of-googl...

It covers how it actually works (probably), and how to train your own classifier for it, with some seemingly decent results.

They don't want you to know, because they're the baddies. Imagine how much money they can get from advertisers if they're able to identify every single piece of code, reddit thread, email, GitHub readme that you've ever written based on your secret ID. They're creaming themselves just thinking about it.

"Excellent work acquiring that outlook data Anat, now let's cross check the defunct company emails against YouTube videos edited with Google PrivateEditAI™ to figure out what the social security number of this YouTube account is."

> It's a real shame Google isn't more transparent about how it actually works

> classifying images in bulk or offline

You've described exactly the elements spammers and fraudsters need to be able to defeat this mechanism.