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Subject: "Lrightroom 4 adjustment brush artifacts" Previous topic | Next topic
bobpilot Silver Member Nikonian since 08th May 2007Sun 02-Dec-12 03:46 PM
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"Lrightroom 4 adjustment brush artifacts"


Washington, US
          

Maybe I didn't notice this issue before, is this typical? When I use the adjustment brush to increase exposure, it leaves speckles. Here is the same image; the second is a 1:1 of the first image. The first image shows the adjustment brush settings.





Attachment #1, (jpg file)
Attachment #2, (jpg file)

  

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Replies to this topic
Subject Author Message Date ID
Reply message RE: Lrightroom 4 adjustment brush artifacts
coolmom42 Silver Member
02nd Dec 2012
1
Reply message RE: Lrightroom 4 adjustment brush artifacts
Antero52 Silver Member
02nd Dec 2012
2
     Reply message RE: Lrightroom 4 adjustment brush artifacts
bobpilot Silver Member
02nd Dec 2012
3
          Reply message RE: Lrightroom 4 adjustment brush artifacts
Antero52 Silver Member
02nd Dec 2012
4
               Reply message RE: Lrightroom 4 adjustment brush artifacts
bobpilot Silver Member
02nd Dec 2012
5
               Reply message RE: Lrightroom 4 adjustment brush artifacts
Antero52 Silver Member
02nd Dec 2012
7
               Reply message RE: Lrightroom 4 adjustment brush artifacts
Antero52 Silver Member
02nd Dec 2012
6
                    Reply message RE: Lrightroom 4 adjustment brush artifacts
bobpilot Silver Member
02nd Dec 2012
8

coolmom42 Silver Member Awarded for her enthusiastic support of the community and exemplifying the Nikonian mission “Share, Learn and Inspire” Nikonian since 30th Nov 2011Sun 02-Dec-12 03:57 PM
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#1. "RE: Lrightroom 4 adjustment brush artifacts"
In response to Reply # 0


McEwen, US
          

In the adjustment brush control pane, there is a box labelled "auto mask". If you un-check that box, I'm pretty sure your "speckles" will go away.

The automask function automatically sets a boundary at an area of high contrast, and does not apply the adjustment to that area. This is useful if you are trying to adjust only a continuous dark or light area. It helps you "color in the lines" so to speak. But if the area you wish to adjust has mixed dark/light fine detail (like beard stubble or dirt or grass), the automask function will not apply the adjustment to those as well. That is not the result you want, and you can un-check the automask box to avoid it.

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Antero52 Silver Member Awarded for his expertise in post-processing, being  consistently helpful and professional. Nikonian since 07th Jul 2009Sun 02-Dec-12 04:01 PM
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#2. "RE: Lrightroom 4 adjustment brush artifacts"
In response to Reply # 1


Vantaa, FI
          

Diane is right in that the speckles are areas which are too different from the spot where you landed the brush, and this is why Auto-mask ignored them. Simply unchecking Auto-mask will not fill the holes, and you have to paint over them with Auto-mask unchecked. The way I usually work is that I have Auto-mask on when I paint the border of my mask, and when I fill the mask I uncheck the Auto-mask.

Regards, Antero

  

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bobpilot Silver Member Nikonian since 08th May 2007Sun 02-Dec-12 04:18 PM
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#3. "RE: Lrightroom 4 adjustment brush artifacts"
In response to Reply # 2


Washington, US
          

Uh, I hope i understand this, no, I am sure I don't. Can you explain what LR means by 'mask?'

What do you mean, 'paint the border of my mask?'

I thought I knew how to use LR? I don't!

  

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Antero52 Silver Member Awarded for his expertise in post-processing, being  consistently helpful and professional. Nikonian since 07th Jul 2009Sun 02-Dec-12 07:44 PM
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#4. "RE: Lrightroom 4 adjustment brush artifacts"
In response to Reply # 3


Vantaa, FI
          

Bob, if you look at your first picture, which is a screen capture, you see a tick box "Auto mask". It is checked, which means that the adjustment brush "thinks" you are going to paint the adjustments into areas similar to the ones where you began the adjustment. If you toggle the "O" key for Overlay, or tick the check box under the photo, you see a red (by default, adjustable) mask which tells you which areas you have selected for adjustment. This it the adjustment "mask".

The "border" is then the border (edge, boundary) of the masked region. This is where the Auto mask feature is useful because there usually is good contrast between the areas you do want adjusted and those you don't. When you're well inside the region to be adjusted, it is best to have Auto mask off, precisely for the reason that pixels different from the starting point aren't selected for adjustment, and you get the spots which is the topic of your question.

Regards, Antero

  

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bobpilot Silver Member Nikonian since 08th May 2007Sun 02-Dec-12 07:47 PM
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#5. "RE: Lrightroom 4 adjustment brush artifacts"
In response to Reply # 4


Washington, US
          

Ah, this makes sense now, thank you.

  

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Antero52 Silver Member Awarded for his expertise in post-processing, being  consistently helpful and professional. Nikonian since 07th Jul 2009Sun 02-Dec-12 07:49 PM
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#7. "RE: Lrightroom 4 adjustment brush artifacts"
In response to Reply # 5


Vantaa, FI
          

Ha! We're online at the same time.

Antero

  

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Antero52 Silver Member Awarded for his expertise in post-processing, being  consistently helpful and professional. Nikonian since 07th Jul 2009Sun 02-Dec-12 07:48 PM
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#6. "RE: Lrightroom 4 adjustment brush artifacts"
In response to Reply # 4


Vantaa, FI
          

Note also in that your #1 picture the spot for the adjustment brush is white (non-selected). This means that the values for the adjustment brush you see in #1 are not those which are effect for the spot which is visible in #1. You can click on the spot with the adjustment brush to see the adjustment values, to re-adjust them or to paint or un-paint the mask.

Antero

  

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bobpilot Silver Member Nikonian since 08th May 2007Sun 02-Dec-12 09:15 PM
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#8. "RE: Lrightroom 4 adjustment brush artifacts"
In response to Reply # 6


Washington, US
          

I have a lot of rework to do; I didn't notice this until a few days ago.

I have no idea how many images are affected; probably hundreds.

  

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