From: "Robert Kjettrup" Received: from mail-lf0-f67.google.com ([209.85.215.67] verified) by media-motion.tv (CommuniGate Pro SMTP 6.1.0) with ESMTPS id 6433940 for AE-List@media-motion.tv; Tue, 10 Apr 2018 13:24:46 +0200 Received: by mail-lf0-f67.google.com with SMTP id v207-v6so11145093lfa.10 for ; Tue, 10 Apr 2018 04:30:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=RjWj2LamB8dpnKTPt8jqpJv+bUSs/567EgTwJIbdA/Q=; b=ZB+4GEI7GwAXYj+Ca2pZcrftnIaA095uQcNRLV4pWh/I+P7UMk30Yl8W2mUGAVnLYf Zu7SIe3OECjNotW+2X2s79rcm04wnDXLzhnOkNGAX7l3Fu5A5sWi5Y0XhAKuQZdVFc+1 TJBDUVzml/EJD1Bwc25kPNQuuSiSfYNYAb0mWDDQKamsYqxFkTMZ9YUSZthlCi3wHvNT AAAHFKAi2TkBseUdEph1FvT0SwTsbMa/0RaiAK4DZrCH/G4IrCDWfsEmMQhviekB/pdA v4d1fRe/Kd0sV3+gLs0b0HVVTOlLykw+X+E2Fy96R/OCMCobLg5BjJXTe/dRnVuROlor onWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=RjWj2LamB8dpnKTPt8jqpJv+bUSs/567EgTwJIbdA/Q=; b=YeCWzR6LyOAnrCV2wt/6cAwo4Z5SSb/t3JDWKICxn7LvqzP8caGP9NftH/eMggBolK NOodFWqUnm8sRanIQs9b66aJYuYRjg2lzHHj95h8weBkpRo3C4fXp/5oMIIwf8Jdv5RH NMUO9mhmHP+YH4dHKtRgor5XshYb4FZMunhdOYF5xKaCKlrInKk+Wz0B8PLpk533S8pz 5cTBemgBAxNwLEEnplzl8drO7HIqRDJYlZSnJmDlGPCyg+zz+xXwHP6yHz+uuLbADt/G LUJsea6NFXeVnkgkW2zI82j/FeaWu1nBHrWpFyMKLJXO9XnlFNGqgwP+Mvrf91HN3ILw U4OQ== X-Gm-Message-State: ALQs6tBXwKjD2YYrQFqRq0MroD+Py2xDPdjGD9wDxowygzqFbQAGEodc 2pals7ZAaqZnGD74kxOPShshvWw3PPKxZOROBOA4Sw== X-Google-Smtp-Source: AIpwx49tL8UvBoBgCamB0jny6uOldn/bAqfFRM2kckRXcUcRAApGRwQv0EbAz9qq5uJj9x2+n5fdGSKgXIso90QEP5I= X-Received: by 10.46.29.140 with SMTP id w12mr2097lje.108.1523359805364; Tue, 10 Apr 2018 04:30:05 -0700 (PDT) MIME-Version: 1.0 Received: by 10.46.149.69 with HTTP; Tue, 10 Apr 2018 04:30:04 -0700 (PDT) In-Reply-To: References: Date: Tue, 10 Apr 2018 13:30:04 +0200 Message-ID: Subject: Re: [AE] Unmult? To: After Effects Mail List Content-Type: multipart/alternative; boundary="94eb2c1a6636105da505697cd89b" --94eb2c1a6636105da505697cd89b Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable The Channel Combiner is unfortunately still only 8bit and will disregard any masks on a layer, so if you want to do an accurate unmult with higher bitdepth with native AE tools then you need to first in a precomp do your own Max RGB. Seperating the footage in 3 layers, shifting each color channel into each of the other channel to get a full Red a full Green and a full Blue, then comp them with the Lighten blend mode and you will get the MaxRGB for that image. This precomp you use as an secondary input in a Set Matte effect on the original image and set "use for matte" to "luminance", and end with using Remove Color Matting... So much easier if we had a simple native Unmult effect :-/ to make it a bit simpler to understand the steps above you can download an .aep file here: https://adobe.ly/2JBrw30 Robert 2018-04-10 10:35 GMT+02:00 Chris Zwar : > Thanks for trying and sharing! > > > On 10 Apr 2018, at 6:32 pm, Roei Tzoref wrote: > > Great. Channel Combiner followed by remove color matting give the precise > result. > > Thanks Chris. one more plugin I don't have to use :) > > On Tue, Apr 10, 2018 at 5:59 AM, Chris Zwar > wrote: > >> Oh Ok. I haven=E2=80=99t looked at the AE preset, but I can see that th= e problem >> is that it is using the shift channels to copy the lightness value. Thi= s >> isn=E2=80=99t correct, the better way to do it is to use the channel com= biner >> plugin to copy the Max RGB value to the alpha channel. >> >> Try using that instead of shift channels and see if you get different >> results. >> >> >> On 10 Apr 2018, at 11:37 am, Roei Tzoref wrote= : >> >> Thanks Chris, I have watched your tutorial a while back. this does not >> solve the problem with Ae's unmult though... >> as I mentioned, Ae's Unmult preset, which simply does 2 things: Shift >> Channels with take alpha from lightness + remove color matting, is not a >> good tool for unmulting since it has a discoloring after effect which AF= AIK >> cannot be avoided. >> >> a simple test confirms this. examples here: >> https://imgur.com/a/JoTb0 >> >> AFAIK, the only way to unmult accurately in Ae is to use any of these 3r= d >> party plugins: Knoll Unmult, mekajik Unmult, VC Color Vibrance >> >> >> On Tue, Apr 10, 2018 at 4:03 AM, Chris Zwar >> wrote: >> >>> Actually it=E2=80=99s the opposite. If you simply copy the lightness i= nto the >>> alpha then the RGB is preserved entirely, but this isn=E2=80=99t accura= te. You >>> need to use the remove colour matting plugin as well, which then takes = the >>> background colour into account and adjusts everything accordingly. >>> >>> This video demonstrates what the remove colour matting plugin does and >>> why it=E2=80=99s important: >>> >>> https://www.provideocoalition.com/alpha-channels-good-bad-ugly/ >>> >>> >>> On 10 Apr 2018, at 10:57 am, Roei Tzoref >>> wrote: >>> >>> Ae's Umult - Alpha from Lightness (Unmult) preset) unfortunately is not >>> optimal since it has a discoloring result. it does not preserve the RGB >>> information in it's entirety. I have seen not any way in Ae to unmult >>> natively without this discoloring effect. a simple test is taking a bla= ck >>> solid, adding a lens flare effect, then trying to unmult. >>> >>> another free option exists in the VC Color Vibrance plugin which is fre= e >>> by video copilot: >>> https://www.videocopilot.net/blog/2016/02/color-vibrance-update-v1-06/ >>> >>> simply change the color to 0 to have no effect in color, and change >>> "matte alpha" to "on" >>> >>> >>> >>> On Tue, Apr 10, 2018 at 1:47 AM, Stephen van Vuuren < >>> AE-List@media-motion.tv> wrote: >>> >>>> And if you want to mess around with more creative kind of options, >>>> Brian Moffit eons ago suggested a Shift Channels (Take Alpha from >>>> Luminance) and muck about the a levels effect to boost/lower alpha to = taste. >>>> >>>> -----Original Message----- >>>> From: After Effects Mail List >>>> Sent: Monday, April 9, 2018 6:04 PM >>>> To: After Effects Mail List >>>> Subject: Re: [AE] Unmult? >>>> >>>> It=E2=80=99s not THAT cumbersome to do with standard AE tools=E2=80=A6= first you use >>>> the channel combiner, set the first option to Max RGB and the second t= o >>>> Lightness. Then use the =E2=80=9Cremove colour matting=E2=80=9D plugin= . The combination of >>>> those two effects is the same as unmult. >>>> >>>> > On 9 Apr 2018, at 11:43 pm, Byron Nash >>>> wrote: >>>> > >>>> > Looks like Red Giant put their unmult effect into legacy status and >>>> they have one in Universe now? What's the current pulse on which unmul= t >>>> effect to use? Is there another option these days? >>>> >>>> >>>> +---End of message---+ >>>> To unsubscribe send any message to >>>> >>>> +---End of message---+ >>>> To unsubscribe send any message to >>>> >>> >>> >>> >> >> > > --94eb2c1a6636105da505697cd89b Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
The Channel Combiner is unfortunately still only 8bit and = will disregard any masks on a layer, so if you want to do an accurate unmul= t with higher bitdepth with native AE tools then you need to first in a pre= comp do your own Max RGB.=C2=A0
Seperating the footage in 3 layers, shi= fting each color channel into each of the other channel to get a full Red a= full Green and a full Blue, then comp them with the Lighten blend mode and= you will get the MaxRGB for that image. This precomp you use as an seconda= ry input in a Set Matte effect on the original image and set "use for = matte" to "luminance", and end with using Remove Color Matti= ng... So much easier if we had a simple native Unmult effect :-/
=
to make it a bit simpler to understand the steps above you c= an download an .aep file here:

Robert


2018-04-10 10:35 GMT+02:00 Chris Zwar <AE-List@media-motion.tv= >:
Thanks for trying and sharing!


On 10 Apr 2018, = at 6:32 pm, Roei Tzoref <AE-List@media-motion.tv> wrote:

Great.= Channel Combiner followed by remove color matting give the precise result.=

Thanks Chris. one more plugin I don't have to= use :)

On T= ue, Apr 10, 2018 at 5:59 AM, Chris Zwar <AE-List@media-motion.tv= > wrote:
Oh Ok.=C2=A0 I haven=E2=80=99t l= ooked at the AE preset, but I can see that the problem is that it is using = the shift channels to copy the lightness value.=C2=A0 This isn=E2=80=99t co= rrect, the better way to do it is to use the channel combiner plugin to cop= y the Max RGB value to the alpha channel.

Try using that= instead of shift channels and see if you get different results. =C2=A0


On 10 Apr 2018, at 11:37 am, Roei Tzoref <AE-List@media-mo= tion.tv> wrote:

Thanks Chris, I have watched your tutorial a while back. this does n= ot solve the problem with Ae's unmult though...
as I mentioned, Ae's Unmult preset, which simply = does 2 things: Shift Channels with take alpha from lightness + remove color= matting, is not a good tool for unmulting since it has a discoloring after= effect which AFAIK cannot be avoided.

a simp= le test confirms this.=C2=A0example= s here:

AFAIK, the only = way to unmult accurately in Ae is to use any of these 3rd party plugins: Kn= oll Unmult,=C2=A0mekajik Unmult, VC Color Vibrance

On Tue, Apr 10, 2018 at 4:03 AM, Chris Zwar <AE-List@media-motion= .tv> wrote:
Actually it=E2=80=99s the= opposite.=C2=A0 If you simply copy the lightness into the alpha then the R= GB is preserved entirely, but this isn=E2=80=99t accurate.=C2=A0 You need t= o use the remove colour matting plugin as well, which then takes the backgr= ound colour into account and adjusts everything accordingly.

=
This video demonstrates what the remove colour matting plugin does and= why it=E2=80=99s important:



On 10 Apr 2018, at 10:57 am, Roei Tzoref <AE-List@media-motion.tv> wrote:
Ae&#= 39;s Umult - Alpha from Lightness (Unmult) preset) unfortunately is not opt= imal since it has a discoloring result. it does not preserve the RGB inform= ation in it's entirety. I have seen not any way in Ae to unmult nativel= y without this discoloring effect. a simple test is taking a black solid, a= dding a lens flare effect, then trying to unmult.=C2=A0

= another free option exists in the VC Color Vibrance plugin which is free by= video copilot:=C2=A0
https://www.video= copilot.net/blog/2016/02/color-vibrance-update-v1-06/

simply change the color to 0 to have no effect in col= or, and change "matte alpha" to "on"



On Tue, Apr 10, 2018 at 1:47 AM, Stephen van Vuuren <AE-List@m= edia-motion.tv> wrote:
And = if you want to mess around with more creative kind of options, Brian Moffit= eons ago suggested a Shift Channels (Take Alpha from Luminance) and muck a= bout the a levels effect to boost/lower alpha to taste.

-----Original Message-----
From: After Effects Mail List <AE-List@media-motion.tv>
Sent: Monday, April 9, 2018 6:04 PM
To: After Effects Mail List <AE-List@media-motion.tv>
Subject: Re: [AE] Unmult?

It=E2=80=99s not THAT cumbersome to do with standard AE tools=E2=80=A6 firs= t you use the channel combiner, set the first option to Max RGB and the sec= ond to Lightness. Then use the =E2=80=9Cremove colour matting=E2=80=9D plug= in.=C2=A0 The combination of those two effects is the same as unmult.

> On 9 Apr 2018, at 11:43 pm, Byron Nash <AE-List@media-motion.tv> wrote: >
> Looks like Red Giant put their unmult effect into legacy status and th= ey have one in Universe now? What's the current pulse on which unmult e= ffect to use? Is there another option these days?


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