Generating X-Rite DNG camera profiles for LR. Did I miss something?
Generating X-Rite DNG camera profiles for LR. Did I miss something?
- Subject: Generating X-Rite DNG camera profiles for LR. Did I miss something?
- From: Paul Schilliger <email@hidden>
- Date: Wed, 08 May 2013 18:59:00 +0200
Hi,
Some of you had warned me that the DNG profiles were not near as good as the proper ICC camera Profiles. Since there is no other way to calibrate the camera sensor for LightRoom, I got the ColorChecker Passport to give it a go.
I hastily made some DNG profiles via the X-Rite 1.0.2 export module (out of unprocessed zeroed RAW). Here are my first impressions, tell me please if you think that I must have missed some important step on the way, or if that's simply the way it is.
What strikes me, is that contrarily to the ICC profiles I have previously built for Capture One for instance, the DNG camera profiles seem to only affect the chroma values and they leave the camera to RAW gamma curve mostly unaffected. Since the hues aren't automatically pinned at their proper place on a corrected luminance curve, they seem to be floating and the result can be caricatural sometimes. Attempts to reinforce the gamma curve on images linked to those profiles bring up inevitably an over-saturation, since this affects the RGB channels and not a Lab L curve. The profiles leave also the white balance shift uncorrected. Does that first impression merge with what others have seen, or did I miss perhaps some step on the way to producing those test profiles?
Paul Schilliger
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