USM paramters in PS

offspring · 24th June 2003

Hi all

I'm new to DSLR. Got a 10D and the pics are generally slightly softer (however got some really sharp pics).

I am learning to use USM on PS. Would appreciate parameters u guys typically use.

Cheers

10D
28-135IS USM

willyfoo · 24th June 2003

Amount - 70% to 120% for prints, 150% for web
Radius - 1.5 pixels for 4-6MP
Threshold - 0 to 2

This is just what I'm used to... your mileage may vary

willyfoo · 24th June 2003

Got to clarify something with the numbers above..
These are used before resizing, though many believe that USM should always be done last, but I have the belief that resizing after sharpening will reduce the USB halo effect and introduce anti-aliasing, which makes the sharpening less pronounced, makes the photo more 'natural' and improves JPEG compression slightly.

Disclaimer: I can be totally wrong here, It's just my personal preference.

megaweb · 24th June 2003

my standard USM values

resize image to 700x??? (depend on format)
Amount : 80%
Radius : 0.8
Threshold : 0

Zerstorer · 24th June 2003

I'd turn off in camera sharpening and then employ a 2pass approach.

Amount: 500%
Radius: 0.3
Threshold: 0

Then resize to final web output dimensions:
Amount: (portrait)150-300%(architecture)
Radius: (architecture)0.4-0.7(portrait)
Threshold: 0-2(archi) 3-5(portrait)

For prints, it is highly dependent on size of file.

For a 6MP, target size 4R,
I'd use something like
150%
1.1
5

Experiment with the settings to find the optimal values for your camera. In general, prints require higher sharpening amounts and radiuses compared to onscreen viewing.

StreetShooter · 24th June 2003

For me, I use Smart Sharpening, which creates a mask of the edges where the sharpening effect is required. Reduces noise in the featureless areas.

http://forums.clubsnap.org/showthrea...&threadid=8110

You can set your own preferred parameters.

Note that this works in PS 4.0. Not sure about later versions.

offspring · 24th June 2003

Pardon my stupidity. Shouldn't we use the Amt value > 100% to make it sharper? If so, why use the range between 70 -100%???

I'm clueless in PS

24th June 2003	#1
offspring Member Join Date: Jun 2003 Posts: 1,470	USM paramters in PS Hi all I'm new to DSLR. Got a 10D and the pics are generally slightly softer (however got some really sharp pics). I am learning to use USM on PS. Would appreciate parameters u guys typically use. Cheers 10D 28-135IS USM __________________ blog flickr

24th June 2003	#2
willyfoo Senior Member Join Date: Jan 2002 Location: North Posts: 2,085	Amount - 70% to 120% for prints, 150% for web Radius - 1.5 pixels for 4-6MP Threshold - 0 to 2 This is just what I'm used to... your mileage may vary __________________ Singapore Wedding Photographer Willy Foo on Twitter & Facebook

24th June 2003	#3
willyfoo Senior Member Join Date: Jan 2002 Location: North Posts: 2,085	Got to clarify something with the numbers above.. These are used before resizing, though many believe that USM should always be done last, but I have the belief that resizing after sharpening will reduce the USB halo effect and introduce anti-aliasing, which makes the sharpening less pronounced, makes the photo more 'natural' and improves JPEG compression slightly. Disclaimer: I can be totally wrong here, It's just my personal preference. __________________ Singapore Wedding Photographer Willy Foo on Twitter & Facebook

24th June 2003	#4
megaweb Moderator Join Date: Jan 2002 Location: East Posts: 8,106	my standard USM values resize image to 700x??? (depend on format) Amount : 80% Radius : 0.8 Threshold : 0 __________________ See my Photo Gallery at the Clubsnap \| Pbase

24th June 2003	#7
offspring Member Join Date: Jun 2003 Posts: 1,470	Pardon my stupidity. Shouldn't we use the Amt value > 100% to make it sharper? If so, why use the range between 70 -100%??? I'm clueless in PS __________________ blog flickr

24th June 2003	#5
Zerstorer Senior Member Join Date: Jul 2002 Posts: 3,610	I'd turn off in camera sharpening and then employ a 2pass approach. Amount: 500% Radius: 0.3 Threshold: 0 Then resize to final web output dimensions: Amount: (portrait)150-300%(architecture) Radius: (architecture)0.4-0.7(portrait) Threshold: 0-2(archi) 3-5(portrait) For prints, it is highly dependent on size of file. For a 6MP, target size 4R, I'd use something like 150% 1.1 5 Experiment with the settings to find the optimal values for your camera. In general, prints require higher sharpening amounts and radiuses compared to onscreen viewing.

24th June 2003	#6
StreetShooter Moderator Join Date: Jan 2002 Location: Katong Posts: 4,702	For me, I use Smart Sharpening, which creates a mask of the edges where the sharpening effect is required. Reduces noise in the featureless areas. http://forums.clubsnap.org/showthrea...&threadid=8110 You can set your own preferred parameters. Note that this works in PS 4.0. Not sure about later versions.