Threshold again, now with D&S filter

LH
Posted By
Linda_Hirsch
Oct 26, 2005
Views
335
Replies
1
Status
Closed
I’ve been trying to get a handle on threshold in USM because I’ve always just put it at zero and even read few articles saying that is fine, less complicated.

But someone just showed me results of dust and scratches filter with setting of 6/17. 17 being threshold. ANd I just did a test two images, one with 3/0 setting and other 6/17.

One one image no difference.
On other 6/17 much better. the d&s removed same, but with 17 threshold images retained lot of original grain and detail.

So still curious how threshold does that. and do other really get into tweaking threshold? What order do you apply setting. thanks.

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C
chrisjbirchall
Oct 26, 2005
Depends on the subject matter.

On a portrait, for instance, I would look for maximum sharpening to the eyes, lips, hair etc. Normally, this would also accentuate any flaws in the skin. Setting a threshold level of (say) 12 means the sharpening will only take place in areas of greater contrast and leave the skin unsharpened.

Another trick is to duplicate the layer and sharpen the new layer. Then add a layer mask and "paint out2 the areas you don’t want to be too sharp.

Chris.

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