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Sir, there's a cat in your mirror dimension
Pets do the darndest things, especially if you teach them a bit of math.
This makes you wonder: if the frequency-domain representation of a typical image looks like diffuse noise, if most of it is perceptually unimportant, and if the transform is just a lever that takes us back and forth between two functionally-equivalent dimensions… could we start calling that mirror dimension home and move some stuff in? Next, I reused the photo of a woman from an earlier example and placed the mirror-dimension “cat noise” pattern over it, dialing down opacity to minimize visible artifacts: There’s plenty of prior art for using audio spectrograms for hidden messages, and some discussion of text steganography piggybacked on top of JPEG DCT coefficients.
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