On 15/02/2015 14:57, Francisco Cribari wrote: > I have been noticing moiré in several Fujifilm RAW files (.RAF, > X-Trans). Here is an example: > > RAW file: https://dl.dropboxusercontent.com/u/2171814/_FFX7922.RAF > > XMP (RAW): https://dl.dropboxusercontent.com/u/2171814/_FFX7922_01.RAF.xmp > > JPG (SOOC): https://dl.dropboxusercontent.com/u/2171814/_FFX7922.JPG > > XMP (JPG): https://dl.dropboxusercontent.com/u/2171814/_FFX7922.JPG.xmp > > There is moiré in the blue shirt in the RAW file, but not in the SOOC > JPG. (Take a look, e.g., at the area between his camera and his vest > after zooming in.) Even with Markesteijn 3-pass demosaic + five times > color smoothing I still see moiré. > > I wanted to find out whether this is a Fujifilm-related issue or a > Darktable-related issue, so I asked a friend to open the RAW file in > Lightoom (version 5.7.64) and export a full resolution JPG. (Since all > my computers rum Linux, I do not access to LR.) Here is the resulting JPG: > > JPG exported by Lightroom: > https://dl.dropboxusercontent.com/u/2171814/_FFX7922b.jpg > > I see no moiré. > > Is there a way to get rid of moiré in X-Trans images when using > Darktable? Comments and tips and welcome. Best, Francisco >
Hi, I've been toying with your import. What was weird was that I didn't get the moiré at all with my default settings. After a bit of trial and error, I found that it's my profiled denoise (wavelet, on color) that removes the moiré. It seems logical afterwards, but maybe you'll get a better explanation by one of the experts on the mailing list. Meanwhile, give a try to this setting. I could improve a bit the result by being more agressive with the denoising (as the camera must have done, as the resolution on the shirt isn't that wonderful on the SOOC jpeg), then removing fringing. Here are the jpeg I managed to get http://dl.free.fr/rm.pl?h=qplZFfYAV&i=71793947&s=RYsfRXzrsDAPVfCLYHWtaTqwzUvwNVao and the XMP http://dl.free.fr/rm.pl?h=v5E43Q0ZK&i=71793977&s=NhKwhz2Am1DoTsJTr3YgOrmXNQCNiHA8 Regards Marc ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Darktable-users mailing list Darktable-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/darktable-users
