Wolfram Function Repository
Instant-use add-on functions for the Wolfram Language
Function Repository Resource:
Invert a zero-frequency shift
ResourceFunction["FourierShiftInverse"][data] rearranges a zero-frequency-shifted Fourier transform data back to the original transform output. | |
ResourceFunction["FourierShiftInverse"][data, dim] operates along the dimension dim of data. |
Swap the left and right halves of a vector:
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If a vector has an odd number of elements, then the middle element is considered part of the right half of the vector:
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Swap the first quadrant of the matrix with the third, and the second quadrant with the fourth:
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Swap halves of each column of matrix:
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Swap halves of each row of matrix:
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FourierShiftInverse can be applied to a multidimensional array:
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The dimension can be any valid part specification:
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An optical low-pass filter model:
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Apply the filter to a image:
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FourierShiftInverse is the inverse of the resource function FourierShift:
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FourierShiftInverse does not support ragged arrays:
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