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I have to admit this is puzzling ... can you provide the code and the image ? In this notbook, there is an example with peaks of less than 4 degrees of azimuthal extent which are properly reduced. |
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So this is the code I used. |
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Thanks for the PDF: I agree with you, there is nothing "obviously" wrong. Maybe the parameter of the vmax option in imshow which should be 1000 rather than 200 in the last cell ? Is it possible to get the input image to investigate further ? |
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Thanks for the image.
Now the images look the same ... except pyFAI did not perform any interpolation, rather it did histograms. |
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I have been playing around with the 2D AzimuthalTransformation of pyFai just to be extremely suprised by the staggering difference in high frequency preservation with respect to e.g. skimage polar transform.

pyFAI 2D AI:
skimage warp_polar:
Is this behavior expected? I know the units are different (yes the axis names are wrong) but the 2D integration erased all the texture.
Cheers
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