Using the railway network as a flatbed scanner [video]
media.ccc.de17 points by Jimmc414 2 hours ago
17 points by Jimmc414 2 hours ago
Basically the inverse of https://daniel.lawrence.lu/photos/ or https://trains.jo-m.ch/ ;)
I love this so much! This is such a cool hack, just for the sake of it. Amazing hacking and amazing art!
In the preso, she has said the full size output is on the website-
can anyone see what that link is? I didn't find it on the video page, but I might've just missed it.
http://philo.gay/linecam/gallery.html -- it's linked within the middle of the talk.
It would have been pretty easy to use a horizontal line scanner to get image speed.
In any case, it seems that using a full frame video would be much easier to post process since frame to frame correlation tells you everything you need to know about motion.
One of the first scripts I vibecoded did exactly this. It works well, but is limited by framerate when there's high motion.
I'm not sure that video would have been easier to postprocess. At what fps and shutter speed?
Using the camera as a scanner has a long history in satellite cameras and other aerial photography
they need to connect with the skunkworks team, they solved this problem on sr 71 long time back !