Padding image with zeros in DFT

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ddd
ddd 2011-12-28
When using discrete Fourier transformation in case 1D and for case 3 D for color images is there a need to do the padding with zeros in the images ? If Yes , how much? Thank you very much

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回答（1 个）

Walter Roberson
Walter Roberson 2011-12-28
Usually there is no need to do padding; furthermore, often padding would not be correct. DFT assumes periodic signals, and padding with zeros complicates the periodic function a fair bit.

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