Re:The Security Camera Shy Hoodie
by dale_glass on Tuesday February 28, 2023 @08:34AM
(#34969101)
> During daytime mode it employs an IR cut filter, and during nighttime mode it removes the filter and adds additional IR lighting for "night vision".
Ah, I see
> Being able to see a faint blinking LED from a remote is not sufficient to prove that the effect is strong enough to completely obscure a person's face when an IR cut filter is applied, in my opinion.
It's just a matter of intensity. An IR filter is going to block some percentage. If it blocks 90%, you just need a 10X stronger light. At some point this gets impractical of course, but you can buy some really powerful LEDs. Most security cameras are cheap and the IR filter is there to improve the image in the daytime, not to counteract intentional attacks.
No, the camera also has IR cut - it lists the feature right in the product title, and the customer-provided samples in the reviews clearly have an IR cut filter applied (you can tell by the "natural" colors in the daytime photos). Is has two modes of operation, daytime mode and nighttime mode. During daytime mode it employs an IR cut filter, and during nighttime mode it removes the filter and adds additional IR lighting for "night vision".
For more info on how IR-cut works in security cameras, see this support article from Annke (another seller of cheap security cameras on Amazon): https://help.annke.com/hc/en-us/articles/4403980153497-What-...
> They still can see the blinking LED on an IR remote, because the filter isn't perfect.
Being able to see a faint blinking LED from a remote is not sufficient to prove that the effect is strong enough to completely obscure a person's face when an IR cut filter is applied, in my opinion.