News for hackers. Stuff that matters.

A comment on Show HN: Density – Anonymous People Counter and API. Parent comment

Re:Show HN: Density – Anonymous People Counter and API by escobar on Monday July 13, 2015 @01:31PM (#9879588)
Yeah, I find that claim particularly amusing since they're just using a single PIR sensor, which is far less accurate than any camera based system. There's no way that you can claim a single PIR beam is as accurate as a camera based system.

There's absolutely no information on what they consider "accurate," and anything I can find on older HN threads is very vague and implies that accuracy wasn't their main focus.

Here's a basic question I have: can this count a mob of 20 people walking out of store at the same time? If it can't, I believe "accuracy" should have some context, since there are other enterprise systems that do that no problem.

[ Parent | on HN ]
Re:Show HN: Density – Anonymous People Counter and API by tonyhb on Monday July 13, 2015 @01:46PM (#9879692)
> "With Density on a doorframe, we’ll tell you."

The landing page advertises this as an entry-level system for doorframes. It doesn't seem that this is made for costco-level swarms of people entering a large space at one time. That said, I also have my doubts on accuracy but the error margin is probably acceptable enough to most.

[ Parent | on HN ]
Re:Show HN: Density – Anonymous People Counter and API by Pyfagorass on Monday July 13, 2015 @02:20PM (#9879927)
Most camera systems wouldn't accurately count the mob of 20 (I work on camera count analytics, and we have to correct for this)
[ Parent | on HN ]