At default resolution GS camera captures 1456x1088@60fps:The traffic is moving with the speed to 30 to 40 km/h
Code:
pi@raspberrypi5:~ $ rpicam-vid --list-camerasAvailable cameras-----------------0 : imx296 [1456x1088 10-bit RGGB] (/base/axi/pcie@120000/rp1/i2c@88000/imx296@1a) Modes: 'SRGGB10_CSI2P' : 1456x1088 [60.38 fps - (0, 0)/1456x1088 crop]1 : imx296 [1456x1088 10-bit RGGB] (/base/axi/pcie@120000/rp1/i2c@80000/imx296@1a) Modes: 'SRGGB10_CSI2P' : 1456x1088 [60.38 fps - (0, 0)/1456x1088 crop]pi@raspberrypi5:~ $ Now 40km/h is 40/3.6=11.11m/s or 40/3.6/60=0.1852m or 18.52cm between frames.
In case of higher speeds GS camera is still your friend, as you can go down to >300fps recordings with help of media-ctl crop:
https://stamm-wilbrandt.de/GS/
The problems is to get the plate into cropped camera view.
Even on German "Autobahn" cars seldom drive more than 300km/h.
With 60fps you would have 300/40*0.1852=1.39m between frames, so maybe you do not need high framerates.
You just need to make sure that shutter time is small enough to not blur the captured frames.
P:S:
Correction, you may not need GS camera, you just need very small shutter times.
With "only" 40km/h there will not be big rolling shutter effect.
I once captured 3Dprinted pellet inflight with 340m/s(!) by strobing with 2µs flash durations, with v1 camera:
viewtopic.php?p=1952629#p1956584
Statistics: Posted by HermannSW — Wed Apr 03, 2024 7:30 pm