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Author Topic: Q-SE RAW Noise Reduction on DNG files from a Scanner  (Read 4505 times)
Terry-M
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« on: June 18, 2009, 01:12:59 PM »

Mike,
I've been scanning some old slides on a flat-bed with VueScan and with an output of DNG-Tif files. The idea being that I can make use of the Q-SE raw image processing features on these files, including noise reduction for the film grain.
I was wondering how Noise Reduction works in this situation as there is no ISO value associated with the image. I cannot see any change to the image whatever the NR setting is used in the preferences.
Perhaps I'm on the wrong tack altogether!
EDIT: just to clarify, VueScan calls them Tiff DNG format and they have a .dng extension. Qimage reads them as a raw file and refine etc. works.

Terry.
« Last Edit: June 18, 2009, 01:53:28 PM by Terry-M » Logged
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« Reply #1 on: June 18, 2009, 02:19:03 PM »

The noise reduction isn't going to work if there is no ISO in the DNG file because the NR is adaptive.  You'd have to use the high ISO noise filter in the batch filter.

Mike
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Terry-M
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« Reply #2 on: June 18, 2009, 09:36:45 PM »

Thanks Mike,
I just wondered if there was a work-round. I used the NeatImage route in the end - just to exercise that program a little; Q-SE raw processing is has made it more-or-less redundant.  Smiley
Terry
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