The first ever Robust PCA applied in Imaging

One of the first ever analog Robust PCA applied in imaging happened in 1838 as Louis Daguerre took this photo. From wikipedia:

"Boulevard du Temple", taken by Daguerre in 1838 in Paris, includes the earliest known candid photograph of a person. The image shows a street, but because of the over ten-minute exposure time the moving traffic does not appear. At the lower left, however, a man apparently having his boots polished, and the bootblack polishing them, were motionless enough for their images to be captured.

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