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digital-signal-processing

Spatial aliasing and 2D downsampling

taught

A fine enough 2D pattern sampled too coarsely can vanish into a falsely uniform block -- and shrinking an image is 2D decimation, needing chapter 14's own anti-alias filter first.

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Requires

Required by

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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.