FFT Shift

Please use this identifier to cite or link to this publication: http://hdl.handle.net/1926/321
A common usage when working with Fourier transform is to shift the
the image to put the zero-frequency component in the center of the
image. This contribution comes with a filter to perform this
transform.
Data
minus 2 Files (634Kb)
Code
minus Automatic Testing Results by Insight-Journal Dashboard on Mon Nov 6 06:28:13 2006 for revision #2
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plus Automatic Testing Results by Insight-Journal Dashboard on Wed Oct 18 06:17:34 2006 for revision #1
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Reviews
minus fftshift multithreaded filter by Pierre Seroul on 12-05-2006 for revision #2
starstarstarstarstar expertise: 3 sensitivity: 4.5
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Summary:
Similarly to the fftshift and ifftshift functions of Matlab, this filter swaps the "half-spaces" of the input image along each dimension.

Evidence:
The author provides two input images and their corresponding outputs using or not the "inverse" option.

Open Science:
The author provides the source code and an example to reproduce his experiments. He also provides the images.

Reproducibility:
I compiled the code using CMake 2.4 and Visual C++ 2005 Express on Windows XP SP2, there is no error or warning. I ran it with different types of image supported by ITK (png, jpg, tiff, gif, 24-bit bitmap) and it works great.
The results are easily reproducible with the information from the paper.

Use of Open Source Software:
The authors use ITK.

Open Source Contributions:
The author provides his source code and describes clearly how to use it.

Code Quality:
The code is easy to read and all the necessary comments are presents.

Requests for additional information from authors:
Maybe the author could shortly describe how the filter puts the zero-frequency component in the center of the image (swapping parts of the image) in the pdf file.

plus Shift to the Center by Nick Tustison on 11-03-2006 for revision #1
starstarstarstarstar expertise: 3 sensitivity: 4.7
plus fftshift filter for ITK by Jakub Bican on 11-01-2006 for revision #1
starstarstarstarstar expertise: 4 sensitivity: 4.7
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Toolkits: ITK, CMake
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