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Looking for options to remove sky halos produced in Lightroom
May 4, 2016 14:17:56 #
Sometimes I get a very bright, nearly white, halo effect at the boundary between the sky and objects after processing in Lightroom. It appears to be the result of several controls; highlights, sharpening, and brushes used to darken the sky.
In this example, I used a polarizing filter but it was set to darken water and not the sky.
I've tried a few Lightroom tools, but they were not satisfactory. I've corrected the effect in Photoshop using a darken blend layer and the brush tool. A bit laborious.
Does anyone have an alternative technique for fixing this? Especially in Lightroom.
Below are 100% crops showing the original problem and the corrected version from Photoshop.
In this example, I used a polarizing filter but it was set to darken water and not the sky.
I've tried a few Lightroom tools, but they were not satisfactory. I've corrected the effect in Photoshop using a darken blend layer and the brush tool. A bit laborious.
Does anyone have an alternative technique for fixing this? Especially in Lightroom.
Below are 100% crops showing the original problem and the corrected version from Photoshop.
Halo problem in Lightroom
Fixed with darken blend layer in Photoshop
May 4, 2016 14:29:52 #
Several things can aggravate it, but its root cause is sharpening. My advice would be to avoid it in the first place, which means moderate the global sharpening and apply sharpening selectively to any areas that need more.
You'll also find that jpegs are more prone to it than SOOC raw.
It's hard to tell from the thumbnail images - can you say that your treatment hasn't degraded the overall sharpness and detail of the image? Since it's a sharpening problem I would expect any cures to have an un-sharpening element. And if it has, can the corrective measures be applied selectively to just the problem areas?
You'll also find that jpegs are more prone to it than SOOC raw.
It's hard to tell from the thumbnail images - can you say that your treatment hasn't degraded the overall sharpness and detail of the image? Since it's a sharpening problem I would expect any cures to have an un-sharpening element. And if it has, can the corrective measures be applied selectively to just the problem areas?
May 4, 2016 14:55:18 #
R.G. wrote:
Several things can aggravate it, but its root caus... (show quote)
Below is a 100% crop with no sharpening applied by Lightroom. As you can see, the halo is there, although not as pronounced. But some sharpening is required, so the problem remains and must be corrected.
I'm not looking for a "don't do that" as an option for avoiding the halos. I'm looking for any options for removing them because they (sometimes) appear after all the other processing.
No sharpening applied in Lightroom
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May 4, 2016 15:07:52 #
Was the above image a jpeg? If it was it already had sharpening applied in the conversion process (that also applies to SOOC jpegs). There are some things that will aggravate haloing but not cause it, and if your starting point is a jpeg it's guaranteed to be susceptible to haloing because of the inherent sharpening.
Some images have an abundance of contrasty edges, and applying halo-removing adjustments selectively would be very laborious. I still suspect that whatever global processes reduce the haloing, they will also impact negatively on overall sharpness and clarity of detail.
Some images have an abundance of contrasty edges, and applying halo-removing adjustments selectively would be very laborious. I still suspect that whatever global processes reduce the haloing, they will also impact negatively on overall sharpness and clarity of detail.
May 4, 2016 15:28:38 #
R.G. wrote:
Was the above image a jpeg? If it was it already ... (show quote)
These are from RAW images, not JPG.
May 5, 2016 08:32:46 #
JC, thanks for posting this interesting problem. Sharpening does help. Please mark your attachments with download and provide basic camera, lens and exposure data to help us help you.
Could that artifact be chromatic aberration? Did you apply the lens profile and turn on the fix chromatic aberration feature, automatically or manually? CA usually is magenta or green depending upon the side of the object. I cannot tell from your last post if the artifact is colored. If CA and if you remove it, then sharpening may give work without creating that problem.
Could that artifact be chromatic aberration? Did you apply the lens profile and turn on the fix chromatic aberration feature, automatically or manually? CA usually is magenta or green depending upon the side of the object. I cannot tell from your last post if the artifact is colored. If CA and if you remove it, then sharpening may give work without creating that problem.
May 5, 2016 08:39:22 #
abc1234 wrote:
JC, thanks for posting this interesting problem. ... (show quote)
It's not CA, although I have CA correction applied. And it's not related to camera, lens, or exposure data, which is why I didn't bother with loading original images with EXIF.
This is not a question on how to avoid the problem, but on how to remove it after the fact.
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May 5, 2016 09:26:15 #
I am glad you tried that. I think you are asking me how to remove CA in LR. If so, here you go. Develop>lens corrections>basic and click on the profile and CA boxes. Go to the profile tab to make sure LR has this lens profile. Or, Develop>lens corrections>color and click on remove CA and adjust as desired.
When you sharpen in LR, do you hold down alt while adjusting the masking? This shows you what is sharpened. Or how about selective sharpening with the graduated and radial filters? While they do not give the precise control PS does, they may do the job. Let me know if you need more help with them.
When you sharpen in LR, do you hold down alt while adjusting the masking? This shows you what is sharpened. Or how about selective sharpening with the graduated and radial filters? While they do not give the precise control PS does, they may do the job. Let me know if you need more help with them.
May 5, 2016 16:39:11 #
jcboy3 wrote:
Sometimes I get a very bright, nearly white, halo ... (show quote)
Are you using ACR initially to bring your photo into LR?
--Bob
May 5, 2016 16:59:50 #
rmalarz wrote:
Are you using ACR initially to bring your photo into LR?
--Bob
--Bob
No, just a straight import into Lightroom.
May 5, 2016 17:17:59 #
jcboy3 wrote:
No, just a straight import into Lightroom.
You might try using ACR and the sharpen function in that.
--Bob
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May 5, 2016 17:20:48 #
rmalarz wrote:
You might try using ACR and the sharpen function in that.
--Bob
--Bob
It's not just an issue with sharpening; the affect shows up even without sharpening (it's just aggravated by sharpening). And using ACR would be contrary to the Lightroom philosophy of non-destructive editing. Which, of course, is the problem with using Photoshop to clean up after Lightroom in the first place.
May 5, 2016 17:40:56 #
jcboy3 wrote:
It's not just an issue with sharpening; the affect shows up even without sharpening (it's just aggravated by sharpening). And using ACR would be contrary to the Lightroom philosophy of non-destructive editing. Which, of course, is the problem with using Photoshop to clean up after Lightroom in the first place.
ACR is non destructive.
--Bob
May 5, 2016 19:18:58 #
rmalarz wrote:
ACR is non destructive.
--Bob
--Bob
Not if you want ACR edits to stick when you move back to Lightroom.
May 5, 2016 22:16:39 #
JC, when you sharpen, are you selecting and masking the foreground first? I wonder if the mask is feathered or expanded causing the artifact. What do you think? What did you think of my earlier suggestion of using a graduated or radial filter in LR?
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