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Does anyone do USM in Lab mode using what one might initially describe bizzare settings, such as amount: 50-60, radius: 7-20, Threshhold: 1.0?? I thought it was bizzare for the amount to be so small and for radius to be so huge, until I tried it. Boy the results are sharp!! This is dome on "L" channel only.

Alex

G'day mate,

Using a large radius (like 10-50) with a small percentage can be used to increase "contrast" in distant stuff like skies or details in a distant hillside etc...

Try it in a cloudy sky, looks great, or to give the impression of removing "haze" on the details within a distant hillside (like distant farms etc)... Works a treat, but I tend to only do that on things that you don't want to do the "higher percentage/smaller radius/fine grain" smart sharpening of core subject details... If you know what I mean

Cheers mate.

Waiting on my LAB book, then I will be able to understand a lot more........

Thanks for explanation, mudder. BP: the book is great, comes with a CD too, started reading today.

Alex

Alex wrote:Thanks for explanation, mudder. BP: the book is great, comes with a CD too, started reading today.

Alex

You should also get Russell Brown's Photoshop book......... I ordered off his web site....... can't wait to get my hands on the LAB book

http://www.russellbrown.com/tips_tech.html

Alex wrote:Does anyone do USM in Lab mode using what one might initially describe bizzare settings, such as amount: 50-60, radius: 7-20, Threshhold: 1.0?? I thought it was bizzare for the amount to be so small and for radius to be so huge, until I tried it. Boy the results are sharp!! This is dome on "L" channel only.

Very interesting. I just had to try this recipe on one of tonight's end-of-the-world shots. I think, though, the result goes far beyond sharpening, it's almost surreal. Here are the before and after pics, I used amount 55, radius 13 and thresh 1 for the second image:





Maybe I need to fiddle with the knobs a bit, or maybe The GIMP does things differently from Photoshop?

Cheers
Steffen.

I just like to add, I find it interesting how small detail (such as the TV antenna) doesn't get over-sharpened at all, but the roof line gets a halo of sorts. I tried the technique on a few other shots, and everything that sticks out (like tries) gets kind of a holy light around it in front of the clouds. The funny thing is, seeing the picture you know it's fake but it doesn't look fake.

Cheers
Steffen.

big pix wrote:

Alex wrote:Thanks for explanation, mudder. BP: the book is great, comes with a CD too, started reading today.

Alex

You should also get Russell Brown's Photoshop book......... I ordered off his web site....... can't wait to get my hands on the LAB book

http://www.russellbrown.com/tips_tech.html

Thanks BP,

So many books, so little time.

Alex

Photoshop abillity is awesome, I had a play with the above method with this out come..


Origonal.


Edited




Colours come out different on the web to my print and screen oh well you get the idea.
MATT