I understand your point and all I can offer for now are intuitions to be
confirmed by experiments. But… :
1. the lens distorsion profiles provided by lensfun are user-produced
and my bet is they are not 100 % accurate, which could do more harm
than good,
2. to some extend, the deconvolution takes care of lens distortion too
*Aurélien PIERRE*
aurelienpierre.com <http://aurelienpierre.com>
------------------------------------------------------------------------
Le 2017-10-16 à 06:21, Tobias Ellinghaus a écrit :
> Am Sonntag, 15. Oktober 2017, 14:51:47 CEST schrieb Aurélien PIERRE:
>> Hi,
>>
>> this technic aims at solving all kinds of blurs (static and motion
>> blurs). The most challenging configuration is when the blur is not
>> uniform along the image. I fear that applying geometric corrections
>> before deblurring could modify the spatial distribution of the blur in
>> the corners and lead to some inconsistencies in the solution.
> But that's exactly what we want. When dealing with motion then the lens
> distortion has to be removed to have a uniform blur, otherwise the blur would
> be curved along the lens distortion. Or am I missing something here?
>
>> However, I'm working on a masked implementation which would take only a
>> relevant portion (512×512 px) of the image as an input for performance
>> purposes, so at the end, the order of applyance of the modules might not
>> make a difference.
>>
>> *Aurélien PIERRE*
>> aurelienpierre.com <http://aurelienpierre.com>
>>
>> ------------------------------------------------------------------------
>>
>> Le 2017-10-14 à 10:54, Tobias Ellinghaus a écrit :
>>> Am Donnerstag, 12. Oktober 2017, 22:30:51 CEST schrieb Aurélien PIERRE:
>>>
>>> [...]
>>>
>>>> I believe that it should be applied right after denoising since this is
>>>> low-level signal processing. Also a Total Variation and a Wiener filter
>>>> denoising methods should be added to the modules for better results with
>>>> the deconvolution (Total Variation is litteraly a gradient computation
>>>> plus 3 lines of code similar to the Unsharp Mask equation ; I'm not
>>>> familiar with Wiener filters, althouh they come often in the litterature
>>>> as a RL pre-processor).
>>> Wouldn't it be better to have it after lens distortion? If it's meant to
>>> fix camera shake then having lens distortion in the way seems like a bad
>>> idea.>
>>>> mit herzlichen Grüße ;-)
>>>>
>>> :)
>>> :
>>>> *Aurélien PIERRE*
>>>> aurelienpierre.com <http://aurelienpierre.com>
>>> Tobias
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