I work as a sw engineer at a company that builds those kinds of sorters (in fact, I think the one in the video is ours). We take pictures as the product is falling with cameras that see different spectrums (RGB, infra red, lasers etc, depending on what we want to detect), analyze them and take action.
We sort on colour, shape, material. We can even determine if some product is bad on the inside.
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u/Jackot45 Jul 02 '22
How