On Mon, Oct 16, 2017 at 11:21 PM, Tobias Ellinghaus <m...@houz.org> wrote: > 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?
but if you rotate the camera around "z" (or whatever axis goes inside the screen) you'd need a non-uniform blur kernel anyways. and these methods seem to support spatially varying deconvolution. so i think we should be good either way. -j. >> 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 >> >> ___________________________________________________________________________ >> darktable developer mailing list >> to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org > ___________________________________________________________________________ darktable developer mailing list to unsubscribe send a mail to darktable-dev+unsubscr...@lists.darktable.org
