Difference between Unsharp Mask and normal Sharpener

titlis · 1st December 2011, 23:53

And actually, I wonder what 'Unsharp Mask' stands for

Gavino · 2nd December 2011, 00:08

http://en.wikipedia.org/wiki/Unsharp_masking

Guest · 2nd December 2011, 01:16

See here to understand that "unsharp masking" is just a convolution kernel:

http://forum.doom9.org/showthread.php?t=51988

The strange phrase "unsharp mask" derives from the analog photographic domain; it originated before computers.

titlis · 2nd December 2011, 02:11

thanks now it's clear

so basically It behaves like a normal sharpener but functions in different method comparing original one and blurred one?
ooops now I understand why they call it 'unsharp'....
would better search wiki before asking... my bad

1st December 2011, 23:53	#1 \| Link
titlis Registered User Join Date: Apr 2011 Location: Republic of Korea Posts: 49	Difference between Unsharp Mask and normal Sharpener And actually, I wonder what 'Unsharp Mask' stands for

2nd December 2011, 00:08	#2 \| Link
Gavino Avisynth language lover Join Date: Dec 2007 Location: Spain Posts: 3,431	http://en.wikipedia.org/wiki/Unsharp_masking __________________ GScript and GRunT - complex Avisynth scripting made easier

2nd December 2011, 01:16	#3 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	See here to understand that "unsharp masking" is just a convolution kernel: http://forum.doom9.org/showthread.php?t=51988 The strange phrase "unsharp mask" derives from the analog photographic domain; it originated before computers. Last edited by Guest; 2nd December 2011 at 01:30.

2nd December 2011, 02:11	#4 \| Link
titlis Registered User Join Date: Apr 2011 Location: Republic of Korea Posts: 49	thanks now it's clear so basically It behaves like a normal sharpener but functions in different method comparing original one and blurred one? ooops now I understand why they call it 'unsharp'.... would better search wiki before asking... my bad