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image-processing

Noise, revisited in the frequency domain

taught

DFT linearity applied to additive noise -- real sensor noise spreads broadband across the spectrum, crowding into the same high frequencies where an image's finest real detail lives.

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Requires

Required by

Local knowledge map

Local knowledge map

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Solid arrows are required prerequisites; dashed are recommended or helpful. Lower rows are more foundational. Click any box to jump to that concept.