Luminous Landscape Forum

Raw & Post Processing, Printing => Digital Image Processing => Topic started by: 1IRISHBOY on February 23, 2006, 09:52:02 am

Title: Unsharp Mask
Post by: 1IRISHBOY on February 23, 2006, 09:52:02 am

I am getting good results with PS7 using unsharp mask  - but - I really don't understand exactly what Radius and Threshold do. I imagine if I understood these parameters better I could use them more effectivly. Can anyone help me out particularly with radius which seems to have radical effects on outcome?

If it matters I'm using a Canon 100-400L IS and 20D.

Title: Unsharp Mask
Post by: francois on February 23, 2006, 10:41:59 am

Quote

I am getting good results with PS7 using unsharp mask  - but - I really don't understand exactly what Radius and Threshold do. I imagine if I understood these parameters better I could use them more effectivly. Can anyone help me out particularly with radius which seems to have radical effects on outcome?

If it matters I'm using a Canon 100-400L IS and 20D.
[{POST_SNAPBACK}][/a] (http://index.php?act=findpost&pid=58910\")

Did you read Michael's understanding USM (Unsharp Mask) article? If not then you can read it [a href=\"http://www.luminous-landscape.com/tutorials/understanding-series/understanding-usm.shtml]here[/url].
You can also read another essay about USM on CreativePro website here (http://www.creativepro.com/story/feature/11242.html) and if you need more then read this (http://www.cambridgeincolour.com/tutorials/unsharp-mask.htm).

Title: Unsharp Mask
Post by: 1IRISHBOY on February 23, 2006, 01:48:19 pm

Quote

Did you read Michael's understanding USM (Unsharp Mask) article? If not then you can read it here (http://www.luminous-landscape.com/tutorials/understanding-series/understanding-usm.shtml).
You can also read another essay about USM on CreativePro website here (http://www.creativepro.com/story/feature/11242.html) and if you need more then read this (http://www.cambridgeincolour.com/tutorials/unsharp-mask.htm).
[a href=\"index.php?act=findpost&pid=58912\"][{POST_SNAPBACK}][/a]

THANKS Francois. Swiss precision as usual.  

Title: Unsharp Mask
Post by: Jason Cory on February 24, 2006, 11:54:28 am

Ron Bigelow also has a great Sharpening Tutorial on his website. Do a google search and you'll find it. It goes much further than USM, too.