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16th August 2014, 17:45 | #1 | Link |
Registered User
Join Date: Jul 2003
Location: Singapore
Posts: 26
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Looking for a USM filter with 8 pixel radius.
Hi!
I have this film in high definition but extremely soft focus. According to my pixel counting, the soft focus had a glow radius of about 8 pixels. I was thinking of using a vanilla unsharp masking filter like those found in Photoshop and GIMP to "subtract" out the soft glow with USM's halo. It works quite well in GIMP, but I had problem locating an equivalent filter for AVISynth. Most sharping filter uses 3x3 kernels which unsharps film grain rather than removing the soft glow. I was wondering if anyone knows a USM filter with an option to adjust the radius. I never had a need to use a sharpener until now. Thanks in advance.
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17th August 2014, 04:56 | #3 | Link |
Retried Guesser
Join Date: Jun 2012
Posts: 1,373
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I know of two good ways;
- with VariableBlur by Tritical: Code:
# http://avisynth.nl/index.php/Variableblur # http://forum.doom9.org/showthread.php?t=88645 # (libfftwf3-3.dll needs to be in the search path) LoadPlugin(pathBase + "variableblur07\variableblur.dll") #@function Unsharp(float "varY", float "varC", float "strength"[0-1], int "border"=4, ##\ bool "integrate"=false, int "Y"=3, int "U"=2,int "V"=2, ##\ int "gfunc"=-1, int "gfuncc"=-1, int "pcr"=0, int "pcrc"=0, int "nthreads") ## Unsharp(varY=Sqrt(8.0), varC=Sqrt(4.0), strength=0.7) Code:
## posted at: # http://forum.doom9.org/showthread.php?p=1555234#post1555234 #@function NonlinUSM(clip o, float "z", float "pow", float "str", ##\ float "rad", float "ldmp") ## @ z - default 6 (3 = subtle; 16 = massive) ## @ pow - default 1.6 (1.0 = oversharp; 4.0 = mild) ## @ str - default 0.7 (3 = strong; 18 = massive) ## @ rad - default 9 (0.6 = sharpen; 18 = soft) ## @ ldmp - default 0.001 (block overlap? 0.01 = a little smoother?) ## NonlinUSM(z=6, pow=1.0, str=0.7, rad=8.0) EDIT - for example: Code:
NonlinUSM(pow=4) ## enhance: for low bitrate sources NonlinUSM(z=3, pow=4.0, str=1, rad=6) ## enhance less NonlinUSM(z=6, str=1.5, rad=0.6).Sharpen(0.3) ## sharpen: for hi-q sources NonlinUSM(z=3, str=2.5, rad=0.6) ## sharpen: less noise NonlinUSM(z=6, pow=1.0, str=0.7, rad=6.0) ## unsharp NonlinUSM(pow=1.0, rad=2, str=0.7) ## smoothen: for noisy sources NonlinUSM(pow=1.0, rad=18, str=0.5) ## smear: soft glow NonlinUSM(z=16, pow=4.0, str=18, rad=6) ## B+W psycho NonlinUSM(z=16, pow=4.0, str=3, rad=6) ## sepia/artistic NonlinUSM(z=6, pow=4.0, str=1, rad=36) ## local contrast NonlinUSM(z=6, pow=1.0, str=1, rad=36) ## local contrast NonlinUSM(z=16, pow=2.0, str=2, rad=36) ## solarized Last edited by raffriff42; 17th August 2014 at 05:14. |
17th August 2014, 16:02 | #4 | Link |
Registered User
Join Date: Jul 2003
Location: Singapore
Posts: 26
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NonlinUSM seems to do the trick!
Thanks!
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Oh! Signature! My very own Signature! What should I put?! What can I write?! I must write something! Something that everyone can see! And it will appear at the bottom of my every post! Then everybody will be able to read my signature! Nobody will not read my signature! Somebody will tell others to read my signature! Which will be at the bottom of my every post! And i ca...<cropped> |
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