posted in Technology
A cybersecurity researcher covered a Toyota in an AI-generated pattern to confuse Flock cameras
www.techspot.com/news/113418-cybersecurity-researcher-covered-toyota-ai-generated-pattern-confuse.html
TechSpotA cybersecurity researcher covered a Toyota in an AI-generated pattern to confuse Flock cameras
Replying to @Nobody_Special@piefed.social
This approach only works in daylight with cameras that rely on colour only. Infrared spectrum cameras such as what Australia uses on mobile phone traffic cameras are much harder to deal with. Patterns don’t cut it and it’s a huge part of military research into hiding vehicles from infrared spotters.
Disabling the cameras entirely is much more effective.
Replying to @Funwayguy@lemmy.world
Can’t you make patterns in infrared reflective paint?
Not really. We don’t have materials that absorb or reflect infrared light. It’s one of the reasons it’s hard to beat inferred-guided (heat seeking) missiles, the only real solution is to drop something hotter than your plane, aka a flare.
So… get ready for a new era of commercial automotive flares I guess?
Replying to @Cocodapuf@lemmy.world
What if I just hold a sparkler out my window?
Replying to @Cocodapuf@lemmy.world
You are mixing different types of IR and on top are wrong for both cases too. We have materials for both NIR and thermal IR that absorb or reflect them.
Replying to @Eheran@lemmy.world
I’ve been wrong before, this wouldn’t be the first time. But what part of it was wrong? Genuinely, can you clear it up?
As far as absorbing IR light, I’m not even sure how that would work, wouldn’t it just be emitted again as heat?
So if we focus on thermal IR: shiny metal surfaces hardly emit or absorb it. A black surface emits and absorbs as much as possible. We quantify this via the emissivity (and also reflectivity, shiny metal is a mirror). Emissivity of 1 = theoretical maximum of a prefect absorber/emitter (both are directly linked), everyday stuff like skin or wood is about 0.95, shiny metal surfaces roughly 0.1, a rusty or painted surface again about 0.95.
You only emit and absorb the same in thermal equilibrium. If the surface is hotter, it emits more. If it is colder, it absorbs more.
Replying to @Eheran@lemmy.world
So with that last part, I get that in theory, but practically, you can only really absorb IR temporarily, right? Because it all gets released again as heat eventually. Like, say you have a mostly inert object, that isn’t creating any meaningful amount of heat. If you hit that object with 10 joules of thermal IR, over time, wouldn’t nearly all of that energy be either reflected or emitted off it as IR radiation?