roots
Posts: 98
Joined: Wed Feb 18, 2004 2:48 pm

USM Application... Which Method Is Better?

Fri Feb 20, 2004 3:23 am

I'm wondering what's the consensus here between these 2 methods:

1) Use a relatively small to moderate settings (50%/0.5 pixel/0 threshold) and apply it in multiple passes

2) Use a relatively large settings (100-150%/0.5 pixel/0 threshold) and apply it only once

What's the advantage / disadvantage of each? Is one a clear winner over the other?

I have tried both methods but personally most of the time I couldn't tell the difference.

Thanks!
 
Jkw777
Posts: 4427
Joined: Fri Sep 26, 2003 11:15 pm

RE: USM Application... Which Method Is Better?

Fri Feb 20, 2004 3:41 am

To be honest, I don't see the difference between the two. But the idea of applying it in small measures just takes that risk of producing jaggies. Personally I like to mix it up, it all depends how I feel to be honest.

Regards,

Justin  Big thumbs up
jkw6210@btopenworld.com or +447751242989
 
futterman
Posts: 1261
Joined: Wed Sep 24, 2003 11:04 am

RE: USM Application... Which Method Is Better?

Fri Feb 20, 2004 3:50 am

"How do you feel today, Justin?"
"Oh, a little pissed"
"Why don't you go sharpen some photos?"  Big thumbs up


Roots: I use USM usually in one shot, but sometimes apply it twice or three times. The values are in the range of 100/0.3/6. Justin might actually be on to something in regards to it being a 'mood' thing...
What the FUTT?
 
Jkw777
Posts: 4427
Joined: Fri Sep 26, 2003 11:15 pm

RE: USM Application... Which Method Is Better?

Fri Feb 20, 2004 4:02 am

"How do you feel today, Justin?"
"Oh, a little pissed"
"Why don't you go sharpen some photos?"


Haha! But it's a lovely UK saying I'm afraid! You suck Futterman!

Go home  Big thumbs up

Justin  Big grin
jkw6210@btopenworld.com or +447751242989
 
futterman
Posts: 1261
Joined: Wed Sep 24, 2003 11:04 am

RE: USM Application... Which Method Is Better?

Fri Feb 20, 2004 4:50 am

You suck Futterman!

I know  Sad...time to go open Photoshop.  Laugh out loud Nuts
What the FUTT?
 
Jkw777
Posts: 4427
Joined: Fri Sep 26, 2003 11:15 pm

RE: USM Application... Which Method Is Better?

Fri Feb 20, 2004 5:04 am

I know ...time to go open Photoshop.

Heheh  Big thumbs up Ok let me rephrase what I said.....

To be honest, I don't see the difference between the two. But the idea of applying it in small measures just takes that risk of producing jaggies. Personally I like to mix it up.

Justin  Smile/happy/getting dizzy
jkw6210@btopenworld.com or +447751242989
 
wietse
Posts: 3630
Joined: Thu Oct 18, 2001 12:49 am

RE: USM Application... Which Method Is Better?

Fri Feb 20, 2004 5:31 am

Always this for me

50%
.3
0

and applied 2-3 times. With L glass and a good DSLR you really dont need much sharpening. It all depends on your type of camera.

Wietse
Wietse de Graaf
 
Staffan
Posts: 3879
Joined: Tue Mar 18, 2008 9:21 am

RE: USM Application... Which Method Is Better?

Fri Feb 20, 2004 5:34 am

I shoot slides and they need some sharpening. Usually between .2 and .4 and anything from 80%-300%.

Staffan
 
IL76
Posts: 2237
Joined: Mon Jan 05, 2004 5:43 am

RE: USM Application... Which Method Is Better?

Fri Feb 20, 2004 5:44 am

I don't use USM... Big grin
 
eddl
Posts: 672
Joined: Fri Dec 20, 2002 4:54 am

RE: USM Application... Which Method Is Better?

Fri Feb 20, 2004 5:54 am

200% / 0.3 / 0 works for me ... (applied AFTER resizing).

EDDL

[Edited 2004-02-19 21:56:35]
 
TS
Posts: 717
Joined: Thu Sep 04, 2003 9:19 pm

RE: USM Application... Which Method Is Better?

Fri Feb 20, 2004 6:09 am

With L glass and a good DSLR you really dont need much sharpening. It all depends on your type of camera.
I can second that. It also depends on the how much you zoomed (100mm barely any sharpening, 400mm much more sharpening) & the cropping you have done to the pic (no crop—less sharpening). For uncomplicated photos I often use the auto-sharpening, for more difficult cases I usually try USM, sometimes also combined. I also tried this gradual sharpening but couldn't find any advantages.

Thomas
Even a broken clock is right twice a day.
 
fuairliner
Posts: 530
Joined: Mon Jul 16, 2001 7:23 pm

RE: USM Application... Which Method Is Better?

Sat Feb 21, 2004 12:36 am

I use two steps after resizing my slide scans (from around 3000 pixels to 1024 pixels wide): 500%/0.2/5 and 300%/0.2/0.

Explaination: By using 0.2 (instead of 0.3 or higher) small details are sharpened better, but it is not as strong. Therefore I need two passes. The 5 in the first pass is to reduce the grain, I guess this is not necessary with a digital SLR output.
Frank Unterspann - Hamburg, Germany
 
andrewuber
Posts: 2142
Joined: Tue Jul 22, 2003 10:45 am

RE: USM Application... Which Method Is Better?

Sat Feb 21, 2004 9:51 am

I have a dumb question. I use Paint Shop Pro, and it has an unsharp mask as well, but the setting are different. In PSP, the format for the USM filter is:
Radius (0-100); Strength (1-500); and Clipping (0-100). All numbers are whole, no decimal is available.

Can anyone please tell me what settings should be used to sharpen a photo without adding jaggies? I understand it will vary slightly by image, but can someone give me a starting point?

Thanks!

DREW
I'd rather shoot BAD_MOTIVE

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