4 ms·

This is great! I've been meaning to build something like this for a long time. I'm always excited when I notice I've passed the same car on commutes on differen

This is great! I've been meaning to build something like this for a long time. I'm always excited when I notice I've passed the same car on commutes on different days, or see a car I recognize from home in a different part of town. Automating that process and having my phone tell me e.g. "You just passed a car that you once drove past 1,000 miles away from here" is such a tempting side project. Bit big-brothery, though.

tgot 6y ago
I want this tied to a crude speed estimation algorithm, from a stationary camera. Even with ALPR retention restrictions, I could trigger a video save and send the police a video of the idiots doing 50mph through the residential neighborhood.
- ALittleLight 6y ago
  For speed estimation, I wonder if the simplest thing would be two plate readers a fixed distance apart. Say they're attached to light poles N meters distant. When the reader triggers and takes a picture, it pings your server for a timestamp. It does the processing and records car X at time T provided by the timestamp. You then calculate the speed by the distance between the two meters divided by the time between the two timestamps for X. Provided that speeding cars are a problem in your neighborhood, I bet you could find the people responsible for the light poles (which likely have power associated to them) to let you install the devices, especially if you're providing the devices and servers. I don't think you'd necessarily be able to ticket the drivers though, as you're not law enforcement. Maybe you'd be able to work with local law enforcement though.
  - tgot 6y ago
    I was thinking of using the bounding boxes across frames. Maybe I could work with a neighbor, but then things need to be tightly time-synced. Zero chance I could get light pole access. A city endorsed surveillance system? No way.
ocdtrekkie 6y ago
Yeah, I am interested in adding LPR to my car's computer at some point, but it'd be locally processed and stored for personal reference. I'd maybe like to know if it detects the plates of people I know well nearby (sometimes I wonder when I see a car I feel I recognize), and I'd want to be able to mark bad drivers I see, and be warned if they come near my car again. My thought is that if I am driving around a driver bad enough that I think about the risk of accident, I might want to know if they're close to me again in the future.

tgot 6y ago

I want this tied to a crude speed estimation algorithm, from a stationary camera. Even with ALPR retention restrictions, I could trigger a video save and send the police a video of the idiots doing 50mph through the residential neighborhood.

ALittleLight 6y ago
For speed estimation, I wonder if the simplest thing would be two plate readers a fixed distance apart. Say they're attached to light poles N meters distant. When the reader triggers and takes a picture, it pings your server for a timestamp. It does the processing and records car X at time T provided by the timestamp. You then calculate the speed by the distance between the two meters divided by the time between the two timestamps for X. Provided that speeding cars are a problem in your neighborhood, I bet you could find the people responsible for the light poles (which likely have power associated to them) to let you install the devices, especially if you're providing the devices and servers. I don't think you'd necessarily be able to ticket the drivers though, as you're not law enforcement. Maybe you'd be able to work with local law enforcement though.
- tgot 6y ago
  I was thinking of using the bounding boxes across frames. Maybe I could work with a neighbor, but then things need to be tightly time-synced. Zero chance I could get light pole access. A city endorsed surveillance system? No way.

ocdtrekkie 6y ago

Yeah, I am interested in adding LPR to my car's computer at some point, but it'd be locally processed and stored for personal reference. I'd maybe like to know if it detects the plates of people I know well nearby (sometimes I wonder when I see a car I feel I recognize), and I'd want to be able to mark bad drivers I see, and be warned if they come near my car again. My thought is that if I am driving around a driver bad enough that I think about the risk of accident, I might want to know if they're close to me again in the future.