Hello. Thanks for the answer. Yes I did the same to remove them (ppg, small edge treshold and color smoothing) but I find the loss of sharpness too much. I'm still surprised that all the other raw converters I tried (I need to find a way to other Windows and Mac -only converters) get rid of them: do you think, as you suggest, that they detect then ignore those pixels? That would be useful indeed. Cheers denis
De: "johannes hanika" <hana...@gmail.com> À: "Denis Testemale" <de...@testemale.name> Cc: "darktable-users" <darktable-users@lists.sourceforge.net> Envoyé: Jeudi 23 Juillet 2015 07:29:07 Objet: Re: [Darktable-users] Panasonic LX100 - can't remove some strange isolated pixels hi, yes, these look like broken pixels to me. the black ones are dead green pixels and the bright crosses are red/blue colour channels i believe. i could get rid of them by setting the edge threshold to 0.001 in the demosaic module (this does a median filter on the greens) and use two iterations of colour smoothing (this handles the bright crosses), all for ppg. did you try that and found fail cases for it? of course this comes at a loss of sharpness :( a better way to handle this would probably be to detect completely black pixels and ignore them. cheers, jo On Thu, Jul 23, 2015 at 8:52 AM, Denis Testemale < de...@testemale.name > wrote: Hello DT users, during my tests with my new Panasonic LX100, I noticed that I sometimes can see some "strange" pixels, a bit like hot pixels. Some are black, some are green. An example is visible here: http://www.testemale.name/temp/lx100_dt_pixels.png I don't know if they can be considered defective pixels and I want to be sure before sending the camera back. What puzzles me is that: - the "hot pixels" module doesn't do anything - they are not visible in the OOC jpgs - they are not visible in Rawtherapee or Corel AftershotPro or UFRAW interpretations of the same files (only one white bright pixel is also visible through the other raw converters and removed by DT under some favorable conditions) - I can reduce or sometimes remove them by playing with the color smoothing and treshold slider of the demosaic module, but there is no reproducible and reliable method that I found. One raw file is available here: http://demo2.ovh.net/fr/d19b838bcddddefecadd3b60a757430d/ Can I hear your feedback on that please? Thanks. Cheers denis ------------------------------------------------------------------------------ _______________________________________________ Darktable-users mailing list Darktable-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/darktable-users
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