On 17/02/2015 18:39, Francisco Cribari wrote: > Dear Marc: > > [1] May I ask you which base curve you used? I noticed you did not use > the Fuji X100S base curve that comes with Darktable. That's because your image is DR-200. I usually change the basecurve a bit and raise the exposition +1 to compensate, automatically (I have a lua script to do that). This basecurve boosts a bit the low lights. I'm not sure it is better, it's just the way I like it, and I tried to make it look close to what the camera produces with DR-200.
Maybe I should calibrate the camera in DR-200 to get a correct basecurve, one of these days, instead of relying on my handmade basecurve :) > > [2] I noticed you used an agressive denoise profiled setting (wavelet + > color): strength = 3.819. Yes, I still had a bit of moiré without such an agressive setting on your image. But maybe I went a bit too far, I don't know. I did it very quickly (I think my result was a bit overexposed, I just removed the moiré and got rid of the green artefacts I got by applying defringe). The purpose was just to show you that the way to go was probably the color/wavelet denoising (the only one I'm applying, most of the time). > > [3] This may be off-topic, but what are the advantages of an X-Trans > sensor for those who shot RAW? All my other gear have Bayer sensors > (Nikon D800, Nikon D7100, Nikon D7000, Canon G1X etc.) and I have never > had that much problem with moiré (the Nikon D7100 camera does not have > an AA filter). I have a couple of friends who have Nikon D800E cameras > (no AA filter) and they have not encountered problems with moiré either. > On the other hand, I have been delaing with moiré in several X-Trans RAW > images in DT. The default demosaic method is now different for X-Trans > images in DT which signals that moiré is a concern when it comes to such > images. Are there clear X-Trans advantages to X-Trans sensors that make > they worth? Are the X-Trans demosaic algorithms mature by now or can we > expect improvements in the next few years? On this point, I cannot really comment. I chose my camera (XE2) mostly because of the way it works (dials) and because of the XF lenses (good quality, aperture ring), and I got very good results straight from the camera when I tested it. That is my first and oly digital camera. I used to do film before, so I cannot even compare with Bayer sensors. Are you or your friends also using darktable with their cameras ? Or are they using Lightroom or another tool that may already do the denoising by default ? Or maybe, if they use darktable, they already do denoising by default ? I guess darktable needs a bit more tweaking than most proprietary software (in fact, I don't know, I never used any other tool except rawtherapee). ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=190641631&iu=/4140/ostg.clktrk _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
