[CS3] Sharpening preview not representative of actual change.

JM
Posted By
Jesse_Martin
May 22, 2007
Views
498
Replies
5
Status
Closed
I’m noticing some odd behavior while using either USM or Smart Sharpening.

Basically, as I’m adjusting the sharpening settings (Amount and Radius)in the dialogue box, I use the Preview option to view the changes in my main window. This is because I typically find the actual sharpening preview box to be too small.

As I do this, the main picture window is usually zoomed to about 25% so I can get a broad overview of the sharpening changes taking place. Once I’m happy with my settings I’ll hit "OK". The problem is that the sharpening that’s applied looks nothing like it did during preview mode. The sharpening is much more subdued, almost to the point where it’s hard to even notice a difference.

If I zoom in to 100% I will see more of the sharpening effect, but not at the zoom level I was basing my adjustments on. For example, given a set of sharpening adjustments, 25% zoom level in the sharpening preview looks nothing like 25% zoom level after the sharpening is applied.

Is there any reason for this? Am I approaching this incorrectly?

Thanks for any help.

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MV
Mathias_Vejerslev
May 22, 2007
You should base the sharpening on a 100% preview. All other zooms are approximations, and as such are inaccurate.
C
chrisjbirchall
May 22, 2007
Mathias is quite correct of course – technically.

However… I have found that you get a closer to the result on your finished print if you judge the sharpening using a screen preview of 50%.

At 100% you need to adjust until it looks just a fraction overcooked.

Forget all the other, odd resolutions though.
FN
Fred_Nirque
May 23, 2007
Or do as Mat suggests at 100% and quadruple the distance you view your monitor at.
WE
Wolf_Eilers
May 23, 2007
I have found that you get a closer to the result on your finished print if you judge the sharpening using a screen preview of 50%

I believe Jeff Schewe made similar observations on the Luminous Landscape forum as well.
RK
Rob_Keijzer
May 23, 2007
Michael Reichmann suggested that also when he discussed PhotoKit Sharpener.

< http://www.luminous-landscape.com/reviews/software/pk-sharpe ner.shtml>

(It’s down in the Ouput Sharpening section)

But indeed, avoid the odd percentages, as stated above.

Rob

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