Lightroom: Artifacts on some 5D mark II raw files with Lightroom 4.3

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  • Updated 6 years ago
  • (Edited)
Lightroom 4.3 with 5D mark II raw file. Artifacs on some photos in zones with contrast, usually it seems to appear on lines where there is contrast.

I try get lower LR version (4.2) but find the same issue.

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SergioR

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  • frustrated

Posted 6 years ago

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Steve Sprengel, Champion

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Can you upload the original CR2 file to dropbox.com, yousendit.com, skydrive.com, etc, and post a public download link, here?
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SergioR

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Can't this one just 'cause copyright but I'm gonna get search im my photo lib and if dont find will get my camera and same settings and go outside to repeat a shot so I can upload a CR2 file to public link.

thanks for the interest
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SergioR

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I found another photo, not as agresive results but the artifacts also show. Is like on photos where I have to get the lights down and the shadows up and there is lines.



The CR2 and xmp:

https://www.dropbox.com/sh/26gqiu8oc6...

Also the previous photo with Camera raw and a TIF file of the same CR2 through Canon DPP

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SergioR

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5D Mark II firmware version 2.1.2
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Dorin Nicolaescu-Musteață, Champion

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This is a limitation of current Highlight, Shadow and Clarity tools. See Eric's reply here: http://feedback.photoshop.com/photosh...
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Steve Sprengel, Champion

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Eric's comments were "rolled up" into a "more comments" link so here is the discussion:

LRuser24 7 months ago

LR 4.1 final and ACR 7.1 final: The "thick" artefacts when using lens corrections are gone, but the "thin" variant shown in my post above are still there. Note: The artifacts still change shape when changing lens correction parameters, but they always stay "thin".

I am slightly disappointed. However, the "thin" variant is probably visible only in 100% view on monitor. I am not sure whether it is visible in normal cases, e.g. prints.

Eric Chan (Customer) 7 months ago

This is a limitation of the current technology, a tradeoff we had to make to keep performance reasonable (otherwise to use the Highlights, Shadows, or Clarity sliders would be several times slower and use a lot more memory ...)

Dorin Nicolaescu-Musteață 7 months ago

Can you elaborate a bit, please? Under what circumstances do these limitations arise? Generally, I don't see these artefacts. Is this when Highlights, Shadows, or Clarity are pushed to far, when there's purple fringing on the edge or a combination of both?

Eric Chan (Customer) 7 months ago

Dorin, generally this can happen with strong edges (e.g., dark branches against a bright sky), when used in conjunction with strong settings of Highlights, Shadows, and/or Clarity. The tone mapping methods behind these controls are edge-aware in the sense that they try to minimize halos across strong edges, as you'd expect to see if you were to try doing local dodging/burning with a brush. The underlying masking technology to minimize these halos is very complex and expensive, so we had to make some tradeoffs to get performance to a reasonable level in an on-the-fly, parametric editing system.

Lee Jay 7 months ago

The "on the fly" part is why we really need a progressive rendering system, so we don't have to make those sorts of trades if we don't want to. We used to have "pixel doubling" and detail panel settings applied later, but these have been removed. I'd like to see them back with a slider for the user to decide just how "on the fly" the renderings have to be.

Eric Chan (Customer) 7 months ago

Unfortunately, such a progressive system would not help this case.
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Steve Sprengel, Champion

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Experimenting with the one picture you've made available, the issues appear in the gray halo area around the lamp when extreme highlight recovery is occurring. They do not occur in PV2010 with Recovery maxed out, so appear to be PV2012-specific, as if the boundary-computation between light-and-dark isn't quite right.

The jagged edges don't disappear when sharpening and sharp-detail and noise-reduction sliders are all zeroed, nor when lens-corrections are turned off, so don't appear to be an artifact of detail or lens-profile settings.

Backing off the highlight reduction makes the artifacts appear less prominent but sometimes that may not be what is wanted. There may be some adjustment-brush setting that can be applied to an edge with the spikes, but I haven't tried all the variations, yet. The moire brush didn't help.
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SergioR

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Thank you very much to both of you for the explanations.

I've read the link from Dorin and found is very usefull, I hope on next version can select a slower algorithm for final output result.

With PV2010 can find the issue too but requires even more agresive parameters.



At least I see is not a camera problem or a CR2 problem, and I just need to find another way to not limit the highlights/shadows parameters.

I think the solution now is just procesing with layer masks for the sky on external program, or just set lower parameters and use adjustement-brush for zones far from the borders.