digitalFAQ.com Forums [Archives] - Avisynth: How to reduce redness?

digitalFAQ.com Forums [Archives] (http://www.digitalfaq.com/archives/)

- Avisynth Scripting (http://www.digitalfaq.com/archives/avisynth/)

- - Avisynth: How to reduce redness? (http://www.digitalfaq.com/archives/avisynth/6262-avisynth-how-reduce.html)

muhali3

10-22-2003 04:31 PM

Avisynth: How to reduce redness?

my question is how can i reduce the redness level in my source by using avisynth and not by TMPGenc :?:

i don't know what i should use, tweak, limiter, or what? :?

Thanks :D

Dialhot

10-23-2003 03:36 AM

Limiter has nothing to do with colors.
Tweak is for that.

There is a wonderfull thing that comes with Avisynth that is called THE MANUAL. You should read it once.

kwag	10-23-2003 07:31 AM

...which is around here http://www.avisynth.org/index.php?page=Tweak :)

-kwag

Dialhot

10-23-2003 07:37 AM

I' rather the version that is locally on my (and surely your) PC : in the "docs" directory of avisynth !

kwag	10-23-2003 08:11 AM

Quote:

Originally Posted by Dialhot

I' rather the version that is locally on my (and surely your) PC : in the "docs" directory of avisynth !

But isn't the one on the site more "up to date" :?:
It's a "WiKi" site, so it's updated on-line :!:

-kwag

Dialhot

10-23-2003 08:53 AM

Quote:

Originally Posted by kwag

But isn't the one on the site more "up to date" :?:
It's a "WiKi" site, so it's updated on-line :!:

Yes it is. But what is the interest to have a documentation talking about something you perhaps don't have on your PC because your avisynth version is rather old ?
It's like seeing tweaking hints for winXP on the net and being unable to use them at home because you have win2000.

sh0dan

10-23-2003 11:36 AM

If you only want to remove reddish colors, try:

coloryuv(cont_v=-64)

Values closer to 0 will pass more red, closer to -256 will completely remove all red.

muhali3

10-23-2003 11:48 AM

thanks shodan, its working just like i wanted it to. :D

jorel

10-23-2003 11:55 AM

Quote:

Originally Posted by sh0dan

If you only want to remove reddish colors, try:

coloryuv(cont_v=-64)

Values closer to 0 will pass more red, closer to -256 will completely remove all red.

great Sh0dan!

means that if i use:
coloryuv(cont_u=-64)
i can reduce the blue?

if is right,how can i reduce the green?
:?:

sh0dan

10-24-2003 03:37 AM

@jorel: Yes - reducing v will reduce blueish tones.

Green is a bit more tricky, but this helps:

Code:

v = coloryuv(off_u=-128, off_v=-128)

v = coloryuv(v,off_u=128, off_v=128)

mergechroma(last, v, 0.6)

Adjust the mergechroma factor to adjust how much green should be removed. The same method can be used for other colors, by changing the numbers.

jorel

10-24-2003 07:25 AM

thanks,
i got the "idea" !

:D

ps:
avisynth remember me the way
that "color channel" work in tvs.
sometimes is seamless!