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Why Noise Reduction on RAW?

Started Dec 16, 2015 | Discussions thread
otto k Senior Member • Posts: 2,252
Re: Why Noise Reduction on RAW?
1

OK, I don't have this camera so I used imaging resource samples and here's the thing: it does apply noise reduction in camera and quite strong one.

Here's a small crop of top edge of ISO 25600 SRW file, left side is demosaiced, right side is pure RAW in linear mode (scaled to 8 bits but it doesn't matter). Used dcraw in document mode to exclude any "smart" things raw developer might do (verified with raw therapee).

Left side demosaiced, right side raw SRW

You can actually see that NR is applied to inner part of image as borders are actually not included in final image anyway (jpeg). Transition is quite stark and illustrates the issue nicely.

What to do? Try shooting in continuous mode and see if you get better results. Why? Most (all?) of NX cameras cannot apply NR to images in continuous high mode due to processing needs. This might help you as well, just switch to continuous and give it a try.

IMO, this is extremely silly thing of Samsung to do, as you said, raw files exist for a reason, messing with them in this manner is plain wrong.

 otto k's gear list:otto k's gear list
Canon EOS 600D Samsung NX1000 Samsung NX500 Sony a6400 Samsung NX 30mm F2 Pancake +10 more
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