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A picture of two price displays each the size of a hand which have overlapping numbers, so that it is unclear, how much the product costs. At the top there is text saying “I am not sending mixed signals” at the bottom of one of the displays, it says “Mediamarkt” which is a German Media Tech market. It’s not important to know that for the joke, but I thought I’d just mention it.
Just do a fourier transformation, should clear up those mixed signals nicely.