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USM Application... Which Method Is Better?  
User currently offlineRoots From United States of America, joined Feb 2004, 98 posts, RR: 0
Posted (10 years 6 months 5 days 11 hours ago) and read 3568 times:

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!

12 replies: All unread, jump to last
 
User currently offlineJkw777 From , joined Dec 1969, posts, RR:
Reply 1, posted (10 years 6 months 5 days 11 hours ago) and read 3518 times:

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


User currently offlineFutterman From United States of America, joined Sep 2003, 1301 posts, RR: 44
Reply 2, posted (10 years 6 months 5 days 11 hours ago) and read 3512 times:

"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?
User currently offlineJkw777 From , joined Dec 1969, posts, RR:
Reply 3, posted (10 years 6 months 5 days 11 hours ago) and read 3507 times:

"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


User currently offlineFutterman From United States of America, joined Sep 2003, 1301 posts, RR: 44
Reply 4, posted (10 years 6 months 5 days 10 hours ago) and read 3418 times:

You suck Futterman!

I know  Sad...time to go open Photoshop.  Laugh out loud Nuts



What the FUTT?
User currently offlineJkw777 From , joined Dec 1969, posts, RR:
Reply 5, posted (10 years 6 months 5 days 10 hours ago) and read 3408 times:

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


User currently offlineWietse From Netherlands, joined Oct 2001, 3809 posts, RR: 55
Reply 6, posted (10 years 6 months 5 days 9 hours ago) and read 3389 times:

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
User currently offlineStaffan From , joined Dec 1969, posts, RR:
Reply 7, posted (10 years 6 months 5 days 9 hours ago) and read 3385 times:

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

Staffan


User currently offlineIL76 From Netherlands, joined Jan 2004, 2237 posts, RR: 48
Reply 8, posted (10 years 6 months 5 days 9 hours ago) and read 3375 times:

I don't use USM... Big grin

User currently offlineEDDL From Germany, joined Dec 2002, 738 posts, RR: 16
Reply 9, posted (10 years 6 months 5 days 9 hours ago) and read 3371 times:

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

EDDL

[Edited 2004-02-19 21:56:35]

User currently offlineTS From , joined Dec 1969, posts, RR:
Reply 10, posted (10 years 6 months 5 days 9 hours ago) and read 3357 times:

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


User currently offlineFUAirliner From Germany, joined Jul 2001, 538 posts, RR: 3
Reply 11, posted (10 years 6 months 4 days 14 hours ago) and read 3276 times:

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
User currently offlineAndrewuber From United States of America, joined Jul 2003, 2528 posts, RR: 40
Reply 12, posted (10 years 6 months 4 days 5 hours ago) and read 3227 times:

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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