Doom9's Forum - View Single Post - variable blur 0.4: a gaussian/binomial/average variable radius blur

Sagekilla · 30th November 2008, 17:45

You could futz something in like this, (in pseudo code):

luma = getLuminance(clip2)
strength = (luma < thr1) ? value1 : (luma < thr2) ? value2: (luma < thr3) ? value3: value4
Gaussianblur(strength)

replace thr1-4, value1-4 with appropriate thresholds/strengths, and then find some function that would get the luminance level of second clip and return a number.

All very easy.

Edit: If I could figure out why the hell my avisynth throws an error every time I try to call AverageLuma(), I could make a better script but here's an example for you:

Code:

Avisource("..")
clip1 = last
clip2 = clip1.SomeFilter() # or another source clip.
luma = AverageLuma(clip2)

thresh1 = 30
thresh2 = 60
thresh3 = 120
thresh4 = 200
str1 = 5
str2 = 4
str3 = 3
str4 = 4
str5 = 6

strength = (luma <= 30) ? str1 : (luma <= 60) ? str2 : (luma <= 120) ? str3 : (luma <= 200) ? str4 : str5
GaussianBlur(strength)

30th November 2008, 17:45	#51 \| Link
Sagekilla x264aholic Join Date: Jul 2007 Location: New York Posts: 1,752	You could futz something in like this, (in pseudo code): luma = getLuminance(clip2) strength = (luma < thr1) ? value1 : (luma < thr2) ? value2: (luma < thr3) ? value3: value4 Gaussianblur(strength) replace thr1-4, value1-4 with appropriate thresholds/strengths, and then find some function that would get the luminance level of second clip and return a number. All very easy. Edit: If I could figure out why the hell my avisynth throws an error every time I try to call AverageLuma(), I could make a better script but here's an example for you: Code: Avisource("..") clip1 = last clip2 = clip1.SomeFilter() # or another source clip. luma = AverageLuma(clip2) thresh1 = 30 thresh2 = 60 thresh3 = 120 thresh4 = 200 str1 = 5 str2 = 4 str3 = 3 str4 = 4 str5 = 6 strength = (luma <= 30) ? str1 : (luma <= 60) ? str2 : (luma <= 120) ? str3 : (luma <= 200) ? str4 : str5 GaussianBlur(strength) __________________ You can't call your encoding speed slow until you start measuring in seconds per frame. Last edited by Sagekilla; 30th November 2008 at 18:03.