I am looking to equip my car with some cameras and a recorder. The specs might sound a little James Bond when you read it, but I would like to get it running without Q from the MI6, or needing their funds. :-)
I'm okay with spending some more if the constraints require it, but if there is a cheap solution that's a little worse, that might be fine too.
If something is unclear or underspecified, please let me know!
- The whole thing should run 24/7, so a low power profile would be good to not drain the car battery too much.
- Best would be two or three cameras inside of the car, so they are protected and "hidden", so not immediately visible. Small black box mounted on the back of the rear view mirror is okay too.
- Night vision without extra light (only from street lamps, no IR light) would be really nice. Also highly dynamic, like reading the licence plate of a car that has lights on. Long ago I read CMOS is better suited for that than CCD, is this still the case?
- Resolution should be recognize cars or persons in case something happens. Let's say anything that is between 5 and 20 meters away should be sharp.
- Is this possible with a fixed lens or does it need autofocus? If it does, best would be if it works without sending a signal like a focus grid. Same as the IR lights, I just don't want to tip off thiefs or whatever that there is a camera running.
- Cabling should be simple, so best everything on 12 volts and I think the cables to the recorder could get as long as 6-8 meters.
- Image quality should be around one mega pixels for "normal" 4:3 or 16:9 cameras. Or what would be even better, if it is wide angle around 2-3 mega pixels.
- I thought about two wide angle cameras or four normal ones, so around 4-6 mega pixels in total.
- Monochrome image is okay.
- No display needed.
- Data from all cameras should be stored 24/7 and maybe one week.
- Should connect to the wireless network while I am near home and record the data directly onto a home server and transfer all recorded data too.
- Data processing should happen on the home server to reduce power consumption in the car, like which images changed at all or compression algorithms.
- I thought about a raspberry pi, but only know the open circuit boards. If there is a version with full housing that would be perfect. Or specialized recorder hardware, whatever works.
- If multiple cameras is too much for one recorder, multiple recorders might be good too so each can use shorter cables.
- Should survive shocks during car rides, so a spinning disk might be bad, but with 3 images per second(?!) that should be around 10 tera bytes of SSD??
- Not sure if the camera should be in the car or outside, one would need weather protection, the other something to work when the windshield is fogging.
- Temperature is usually -10°C to 40°C here, but if the car parks longer in the sun, it could go up to 90°C?
If this is too much for one question, I could also split it up?