My HDR function

[MattiasN]

Hi i have done a function for hdr that works very good when i use it for my 8mm transfer heh it did take me many many hours to find the right method or that did work very good for me anyway here it is

clip a_stab=normal exposure or low exposure
clip b_stab=High exposure

and you need HDRAGC from http://strony.aster.pl/paviko/hdragc.htm

function hdr(clip a_stab,clip b_stab)
{
ab=overlay( b_stab,a_stab,x=0,y=0,mask=b_stab,opacity=0.5,greymask=true,mode="Multiply",pc_range=true)
t=a_stab.coloryuv(autowhite=true).TurnLeft().HDRAGC(max_gain = 3.0,min_gain=0.5,coef_gain=2.0,coef_sat=2.00,MODE=1,shadows=true,protect=1,corrector=0.8).TurnRight()
ab1=overlay(a_stab,b_stab,x=0,y=0,mask=a_stab,opacity=0.5,greymask=true,mode="hardlight",pc_range=true)
l=overlay(ab,ab1,x=0,y=0,mask=ab,opacity=1.0,greymask=true,mode="blend",pc_range=true).coloryuv(autowhite=true)
last=overlay(l,t,x=0,y=0,mask=ab,opacity=1.0,greymask=true,mode="blend",pc_range=true).TurnLeft().HDRAGC(max_gain = 1.5,min_gain=0.1,coef_gain=2.0,coef_sat=0.90,MODE=1,shadows=true,protect=1,corrector=0.8).TurnRight()
return last
}

Here is some photos of my telecine diy but on does pictures i did not use this function for HDR it was a older function that was not so good http://www.flickr.com/photos/94271811@N03/

[2Bdecided]

Looking at your pictures, it looks to me like you are oversharpening. Look at the white halo you have added along the white/black transition at the top of the frame.

Cheers,
David.

[MattiasN]

yes hehe you are absolutely right in one of the avisynth pictures you can see little pixel grid or bayer pattern even
I did use videofreds script and did have unsharpmask at 125 if i remember right and that was to much
Last i did use the script i did have unsharpmask at 75 have to experiment more

[MattiasN]

i have more info on the fuction here and a aling script to and some hdr examples

http://forum.filmshooting.com/viewtopic.php?f=1&t=24257

[Selur]

link should be: http://www.filmshooting.com/scripts/forum/viewtopic.php?f=1&t=24257

[MattiasN]

yes you are right
hmm the link i did post did work this morning but not anymore

[MattiasN]

Here is a clip to see the hdr in action

https://vimeo.com/m/73398189

i did buy this super 8 from ebay