| Convolution
theorems |
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| Let F be
the 2D Fourier transform of f, H of h |
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| Define |
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| Convolution
theorem: Convolution in the spatial |
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| (image)
domain is equivalent to multiplication in |
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| the frequency
(Fourier) domain. |
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| Symmetric
theorem: Convolution in the |
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| frequency
domain is equivalent to multiplication in |
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| the spatial
domain. |
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| Why is
this useful? |
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