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Adobe Photoshop Family

4.5K Messages

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76.3K Points

Thu, Jun 30, 2011 1:26 AM

5

Lightroom/Camera Raw: Enable Sharpening Radius, Detail, & Masking even when Amount is Zero

I sometimes set global sharpening to zero then do local sharpening only.

The radius, detail, and masking sliders affect the local sharpening even when global sharpen amount is zero (and the aforementioned sliders are disabled), so they should be enabled.

As it stands, I set global sharpening to 1, just to enable them, then when I'm done, set global sharpening back to zero. (I realize I could just leave global sharpening on 1 and probably not notice a difference, but it bugs me...)

Hopefully this won't be an issue in Lr4, if local sharpening has independent settings, but if not, please consider this simple enhancement.

Thanks,
Rob.

Responses

427 Messages

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7.7K Points

9 years ago

Thank you for this post. Until now, I did not know that the sharpening in brush or graduated filter depends on the global details settings. BTW: Blurring (negative values) seems to be unaffected and works independent of the global details settings.

Oh, and two other things: 1) The manual does not mention this, and worse: 2) When the global details are *deactivated* (using the little switch), this also deactivates any sharpening in the local corrections - however *not* the blurring! This seems a little bit weird and could be a potential pitfall.

946 Messages

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13.8K Points

"Thank you for this post. Until now, I did not know that the sharpening in brush or graduated filter depends on the global details settings. BTW: Blurring (negative values) seems to be unaffected and works independent of the global details settings. "

-sharpening in the brushes from 0 to -50 just reduces the sharpening you apply in the detail panel. From -51 to -100 it applies something sort of like lens blur.

4.5K Messages

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76.3K Points

Yer velcum.

I'm hoping the whole local sharpening / masking / nr / blur business is cleaned up in Lr4, and ties to global sharpening are severed.

There is some significant non-intuitive behavior in the sharpening department, for example:

local sharpening amounts 1 to 150 *add* to global sharpen amount, *but*
local sharpening amounts -1 to -50 *don't subtract*, instead, they "mask" (in a non-additive fashion). -1 masks a tiny bit, but -50 masks *all* (regardless of global amount setting).
-51 to -100 blurs... (and is really an independent function as you noted above).

While this works fine once you know about it, it can lead to some huge surprises, especially when coming from PV2003 with negative sharpening locals applied! (which behaved differently in the negatives).

427 Messages

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7.7K Points

Thanks. Didn't known that, too ;-) So -50 effectively cancels out the global sharpening. This also means that 0...-50 does nothing when global sharpening is set to zero or is deactivated. This really should be explained in the manual. The current explanation is only "Enhances edge definition to bring out details in the photo. A negative value blurs details."

4.5K Messages

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76.3K Points

Right, on all counts, me-thinks.

Hot Tip - Use local sharpener on *exactly* -50 as a local noise reduction substitute - works surprisingly well assuming you also have significant global sharpening applied (otherwise not so much...).

Cheers,
Rob

4.5K Messages

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76.3K Points

9 years ago

See related 'Idea': blur tool.