I re watched the video, and you're right. They said they used the masks to help prevent against mask attacks.
To the extent that it worked, we don't know. Since I am very familiar with the tech, I know that IR light does not have any special properties in detecting a mask vs human skin. But I assume the nueral network they trained looks for movement of some sort.
> Since I am very familiar with the tech, I know that IR light does not have any special properties in detecting a mask vs human skin.
Since you're familiar with the tech, you'll be aware that humans, who are alive, emit IR light which can be picked up by an IR camera, and a mask, which is not, does not.
"IR" as in the heat coming of a human body is very different from "IR light" that is used in setups like this. Just like a cheap phone camera might be able to see the IR from a TV remote, but can't see body heat.
And even if it could, heating a mask to body temperature isn't all that difficult.
