DxO PhotoLab 2 Noise Reduction

Started 3 months ago | Discussions thread
TN Args
TN Args Veteran Member • Posts: 7,984
Re: PRIME vs my RawTherapee NR

nboyer wrote:

Thank you TN for posting your comparison. Ultimately, I believe we all have our favorite RAW processing software, not to say that it may be THE best. My personal favorite is LR, though I would rate DxO's PRIME's NR better. Perhaps, it comes down to individual's ability to coax the best from the software, who knows. Just to prove a point, I took my time and reprocessed the comparison image (the one you drew arrows on showing CA) in DxO and ultimately, produced better results, it is overlayed (left side) aside your RawTherapee image. I don't claim that mine is any better, but it's what I'm comfortable with. Cheers. -Norm

Thanks Norm, I agree with you and I think this discussion has now reached the right point: PRIME is not automatically 'the best' by 'a long way', but it is preferred by many people.

I saw a comment that my Rawtherapee 'rendering' was very different from the DxO, and the is how I get a better result. The problem was actually the opposite : the DxO rendering is highly non-neutral (probably subject to some default or custom tone mapping) and I actually did my best to move the Rawtherapee neutral rendering to something vaguely resembling the DxO. It's a very poor image to choose for an AB comparison of NR.


TN Args wrote:

TN Args wrote:

Adielle wrote:

TN Args wrote:

James Stirling wrote:

Adielle wrote:

Your version has the typical terrible jagged artifacts that Prime avoids. Other than that, too much sharpening.

I didn't add any sharpening beyond whatever default ACR applies Why not play along and show me how much better DXO does , I am trying out 2.2 at the moment

I couldn't actually see any 'terrible jagged artefacts' -- why I asked for side-by-side examples too.

Here's a render from PhotoLab. I used Adobe's E-M1 II DNG profile. As always, "Smart Lighting" Off. It's not hard to see what I mean, but I'll include a side by side picture as well.

Left: Adobe, Right: DxO

(Also, I found it very frustrating to use that 'hair' image as an example, almost impossible to know what is in focus and what is blurred due to out-of-focus vs NR)

Your comment applied to James' version, so here is side by side:

Left James, Right DxO PRIME


Now adding a side-by-side of your PRIME vs my RawTherapee NR

Arrows point to colour artefacts with PRIME, that are nice and clean with RawTherapee

Although both images have artefacts in the dark background to the left of the arrows, IMO your PRIME is the more chunky, granulated and 'noisy' in that area.

Rawtherapee is free open source software, but my point is not 'which wins', but IMO for you to say that PRIME is miles in front on a pedestal all by its own is not right.

Personally I am not a fan of using strong global NR in any case: I prefer to be light-handed with global NR at the raw stage, then only apply NR and sharpening judiciously to selected areas, to a degree that is appropriate for the intended exported image size and purpose.


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