Glass patterns

 Here's some example "Glass patterns" formed when laying a transparent copy of an image on top of the image, which even works when the top image is rotated, shifted, or stretched. ( technically, affine transformations).

If there's streching involved you get spirals not circles but they're just as"obvious".

 

 phone book

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random stars

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random desert sand dunes

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random water waves

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random grass

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very organized brick wall

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