This is quite a fascinating concept. Based around a Raspberry Pi, it takes photographs – lots of photographs – of trains passing through a station and then stitches them together to create a single long composite of the entire locomotive. It works on a similar principle to slit-scan photography, which is often used for capturing fast-moving subjects passing a fixed point – like horses finishing a race.
Slit-scan photography in the digital age typically shoots a stream of 1-pixel wide vertical slices. This is required if you’re trying to the capture speed between multiple moving objects, such as in a horse race. But in this project by “jo-m“, the “slits” are a little wider, which means fewer images are required in order to composite the final result together. But for applications such as this, it’s all that’s needed.
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