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I always had the idea of building something similar to this for my own use: have a dashcam recording while I was driving, and every night taking those videos an
by yegle 3y ago
I always had the idea of building something similar to this for my own use: have a dashcam recording while I was driving, and every night taking those videos and extract the timestamp/GPS/plate number and a short video clip of all cars I encountered on that day.
I haven't thought too much about why documenting these would be useful, but on top of my mind I could get answer of these questions:
- have I seen this fancy/unique looking car in the past?
- is this the same douche bag that I saw last week who can't drive?
- what's the last CA plate number starts with now? Is it 9G or 9H?
- are there more people driving w/ a 9[A-Z] plate in my town? (As a proxy of knowing how many people are still buying new cars in my town)
- alsodumb 3y agoI believe this is illegal in many states.
- loeg 3y agoIt is sometimes illegal for cops/parking enforcement to do this, which might be what you are thinking of.
- CameronNemo 3y agoWhy would it be illegal? You are just filming things you see in public.
- rahimnathwani 3y agoRing should make a dashcam.
- greyface- 3y agoThey do. https://ring.com/products/car-cam https://ring.com/products/car-cam
- rahimnathwani 3y agoWow, a network of these with ANPR would be better than fixed cameras.
- zht 3y agoI've had the same idea! honestly the hard part is remembering to take the SD card out every night and put it into a computer inside. and then I thought maybe I can hook up a raspberry pi and put the sd card in it and have it upload via wifi but then it's a lot of work for no clear benefit
- 0x00000000 3y agoHave you ever tried to read a license plate on dash cam footage? Unless they’re right in front of you in traffic it’s basically impossible. You would probably need a high resolution camera taking pictures every couple seconds instead or maybe when 8k dash cams are commonly available.
- mnw21cam 3y agoUm, yeah, a couple of months ago I pulled my 4k dashcam footage for a car I was following reasonably closely, and I was shocked at how hard it was to make out the correct number plate. But that's largely because the camera is (rightly) extremely wide-angle. Police cars with ANPR presumably have a camera with a slightly more zoomed-in view. I don't know.
- defrost 3y ago> Police cars with ANPR presumably have a camera with a slightly more zoomed-in view. Sixteen+ years ago when making demo plate recognition systems for mobile use, the "cameras" were good lenses onto industrial machine vision processing arrays. Light sensor cells backed by neighbourhood array processing hardware that was uploaded with a series of filters - anti jiggle filter to reduce vibration effects so that successive frames "stacked" correctly and the ROI (region of interest) didn't wobble, Then a ROI search to best guess "back end" of vehicle and licence plate location sharpness filters to enhance letter against plate contrast letter + digit "trained" filters that were primed to do the best match The output was dejiggled "smoothed" images (ie nearly raw made up of rolling average of a few successive frames == good clear slighly processed image) + "best match" image (previous smoothed image + sharpened + overlaid best guess letter shapes) + text output of guessed licence plate. All that worked pretty well - that was my last contact with that specific job, I was doing a lot of speculative contract work for a machine vision specialist supplier at the time.
- sukebe 3y agoThis guy did it on a Tesla Model 3 https://www.wired.com/story/tesla-surveillance-detection-scout/ https://www.wired.com/story/tesla-surveillance-detection-sco...