RL Deconvolution

OldNoob · 02-04-2014, 07:02 AM

wow that RL Deconvolution is pretty nice. i had been using unsharp mask for years but that RLD is far superior

**Spodeworld** · 02-04-2014, 08:02 AM

Where did you run across RL Deconvolution...whatever that is?

OldNoob · 02-04-2014, 08:22 AM

Originally posted by Spodeworld

Where did you run across RL Deconvolution...whatever that is?

Its a fairly new sharpening formula. Raw Therapee has it.

**Miguel** · 02-04-2014, 08:40 AM - **1 Like**

Lightroom has had it since version 3, which is a contributor to why I've never needed any external sharpening plugin.

M

wildman · 02-04-2014, 02:30 PM

RL deconvolution = Richardson–Lucy deconvolution

It's most effective for motion blur.

I'm pretty sure Focus Magic uses it.

rawr · 02-04-2014, 04:14 PM

Originally posted by Miguel

Lightroom has had it since version 3

Where is deconvolution sharpening hiding in LR? I don't recall seeing the option anywhere.

**Miguel** · 02-04-2014, 04:28 PM

Originally posted by rawr

Where is deconvolution sharpening hiding in LR? I don't recall seeing the option anywhere.

"Hiding" is very much the proper description. Decon kicks in with the Details slider around the 50 value, so halos are suppressed. As you know, LR sharpening is very complex, indeed, mysterious, especially around the known effects of the Details slider. If I recall correctly, there is a funny paragraph in Schewe and Fraser's book about how even ACR's engineers don't fully have a handle on it.

Addendum: Rumor has it that Details 0-50 = USM; 50-100 ramps up Decon and tapers off USM.

M

rawr · 02-04-2014, 04:49 PM

Originally posted by Miguel

Decon kicks in with the Details slider around the 50 value

Aha. Thanks for the tip. I'd forgotten about that little slider. I barely ever touch it.

Now that you mention it, falconeye in these forums did describe long ago how the Details slider was implementing deconvolution. I must remember to use it more often.

**Kerrowdown** · 02-04-2014, 05:34 PM

Originally posted by Miguel

Rumor has it that Details 0-50 = USM; 50-100 ramps up Decon and tapers off USM.

The phrase you learn something new everyday, well I gonna make this mine for today, it's rumour that sounds very plausible to me.

**Kerrowdown** · 02-04-2014, 05:34 PM

Originally posted by Miguel

Rumor has it that Details 0-50 = USM; 50-100 ramps up Decon and tapers off USM.

The phrase you learn something new everyday, well I gonna make this mine for today, it's rumour that sound very plausible to me.

That is until I'm told otherwise, then I'll unlearn this.

02-04-2014, 07:02 AM	#1
OldNoob Veteran Member Join Date: Oct 2013 Posts: 402	RL Deconvolution wow that RL Deconvolution is pretty nice. i had been using unsharp mask for years but that RLD is far superior

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02-04-2014, 08:02 AM	#2
Spodeworld Site Supporter Join Date: Aug 2011 Location: New Joisey Photos: Gallery \| Albums Posts: 1,370	Where did you run across RL Deconvolution...whatever that is?

02-04-2014, 08:22 AM	#3
OldNoob Veteran Member Join Date: Oct 2013 Posts: 402 Original Poster	Originally posted by Spodeworld Where did you run across RL Deconvolution...whatever that is? Its a fairly new sharpening formula. Raw Therapee has it.

02-04-2014, 08:40 AM - 1 Like	#4
Miguel Site Supporter Join Date: Sep 2007 Location: Near Seattle Photos: Gallery Posts: 2,743	Lightroom has had it since version 3, which is a contributor to why I've never needed any external sharpening plugin. M

02-04-2014, 02:30 PM	#5
wildman Veteran Member Join Date: Jun 2008 Location: Flyover America Posts: 4,469	RL deconvolution = Richardson–Lucy deconvolution It's most effective for motion blur. I'm pretty sure Focus Magic uses it.

02-04-2014, 04:14 PM	#6
rawr Veteran Member Join Date: Jun 2009 Posts: 11,913	Originally posted by Miguel Lightroom has had it since version 3 Where is deconvolution sharpening hiding in LR? I don't recall seeing the option anywhere.

02-04-2014, 04:28 PM	#7
Miguel Site Supporter Join Date: Sep 2007 Location: Near Seattle Photos: Gallery Posts: 2,743	Originally posted by rawr Where is deconvolution sharpening hiding in LR? I don't recall seeing the option anywhere. "Hiding" is very much the proper description. Decon kicks in with the Details slider around the 50 value, so halos are suppressed. As you know, LR sharpening is very complex, indeed, mysterious, especially around the known effects of the Details slider. If I recall correctly, there is a funny paragraph in Schewe and Fraser's book about how even ACR's engineers don't fully have a handle on it. Addendum: Rumor has it that Details 0-50 = USM; 50-100 ramps up Decon and tapers off USM. M

02-04-2014, 04:49 PM	#8
rawr Veteran Member Join Date: Jun 2009 Posts: 11,913	Originally posted by Miguel Decon kicks in with the Details slider around the 50 value Aha. Thanks for the tip. I'd forgotten about that little slider. I barely ever touch it. Now that you mention it, falconeye in these forums did describe long ago how the Details slider was implementing deconvolution. I must remember to use it more often.

02-04-2014, 05:34 PM	#9
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,835	Originally posted by Miguel Rumor has it that Details 0-50 = USM; 50-100 ramps up Decon and tapers off USM. The phrase you learn something new everyday, well I gonna make this mine for today, it's rumour that sounds very plausible to me.

02-04-2014, 05:34 PM	#10
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,835	Originally posted by Miguel Rumor has it that Details 0-50 = USM; 50-100 ramps up Decon and tapers off USM. The phrase you learn something new everyday, well I gonna make this mine for today, it's rumour that sound very plausible to me. That is until I'm told otherwise, then I'll unlearn this.