From: "Roei Tzoref" Received: from mail-it0-f49.google.com ([209.85.214.49] verified) by media-motion.tv (CommuniGate Pro SMTP 6.1.0) with ESMTPS id 6433546 for AE-List@media-motion.tv; Tue, 10 Apr 2018 10:27:23 +0200 Received: by mail-it0-f49.google.com with SMTP id 19-v6so13780808itw.3 for ; Tue, 10 Apr 2018 01:32:42 -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=xx6BlGaIBwCaJuudwoQWnVjyNE8hf97Z6xC/C+gLrN4=; b=Mn59HiSqv1/HRW4aIrKKAOIIRWoQFmi1/4r40lusnHaKsU4ZiuY0GgNbCbDF8xx2EY rce8bgnRxU5Ol/Rh+eZaXd8e9U+LPHz/dF+1aLpE2cvA+ahtOM9dkmlXPe4OFDO8M/8g jwpWmmCkti5RYOQJPpQ8puT/e4Sv/gr/w0Cq9xS+aZt+8TVno848ldvbSRf3AnrgMIc8 h5BceJ2SqmWizr02CTah2uUDKaoeUZ3MVU8tIV6kEM5EBYAVa46fcqaNqWSzxMvivi/t BnbCnqlbcMbdz3OUKfHM5OJBkJHlFXajFT1NPHSVKIgn/r1PDq4wo5AZvK1Ct7xHSZ92 nEVA== 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=xx6BlGaIBwCaJuudwoQWnVjyNE8hf97Z6xC/C+gLrN4=; b=TgqXmZhhNiS7qd5ZIngIsjGfjlx/orB/e7FnmdeBZBX0LQnZ//mi9k0hBwtyDumh8y 33ecZESfVd8IUPa/jTxWUu4Oj2C8HbdWEUJvcRGzHdOQbvj5ic/Z726rVwIjNa+haQdG PuYlBt7bf/SZTrU5z7/7MsHLhc9DMxRfswwczWQVX/sn8AULb8fAgilgHRCx2tTqhol7 gP9EVUpRU6YKA9XSVEitgAvxrNHWag65pnLIlmUw1xCrFRqmoXnWbPMunFmeRt48KcmG MKjioE5gToDMGa8O199IOzgtMlq3vzbxsEv2eDZMN7PRzxJSFTz+Kb1ebaNBGLkxr5zJ AIYA== X-Gm-Message-State: ALQs6tDH0fTYqL1zYwVdpx+jnpvdPhpUppdSb8dUo81BqFst6Tg5Ke0X YHSYHzeBb64/BlLUmxCLG6/nsoSNeUBZWVnx1b8= X-Google-Smtp-Source: AIpwx48ecD3OTZ7C7BYgckv9twRicyMhQsOH41u6Iz0ZqVN2TbRhqbnKHO5quqZ+dx4UVKyvcBOi1O8ZrCRJdV9IVlM= X-Received: by 2002:a24:3dcc:: with SMTP id n195-v6mr1192900itn.25.1523349160893; Tue, 10 Apr 2018 01:32:40 -0700 (PDT) MIME-Version: 1.0 Received: by 10.2.59.96 with HTTP; Tue, 10 Apr 2018 01:32:00 -0700 (PDT) In-Reply-To: References: Date: Tue, 10 Apr 2018 11:32:00 +0300 Message-ID: Subject: Re: [AE] Unmult? To: After Effects Mail List Content-Type: multipart/alternative; boundary="0000000000009aa14905697a5da3" --0000000000009aa14905697a5da3 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable 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 the= problem > is that it is using the shift channels to copy the lightness value. This > isn=E2=80=99t correct, the better way to do it is to use the channel comb= iner > 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 AFA= IK > 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 3rd > 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 in= to the >> alpha then the RGB is preserved entirely, but this isn=E2=80=99t accurat= e. You >> need to use the remove colour matting plugin as well, which then takes t= he >> 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 blac= k >> solid, adding a lens flare effect, then trying to unmult. >> >> another free option exists in the VC Color Vibrance plugin which is free >> 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, Bria= n >>> 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 to >>> 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 unmult >>> 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 >>> >> >> >> > > --0000000000009aa14905697a5da3 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Great. Channel Combiner followed by remove color matt= ing give the precise result.

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

On Tue, Apr 10, 2018 at 5:59 AM, Chris Zwar <AE-List@media-motion.tv> wrote:
Oh O= k.=C2=A0 I haven=E2=80=99t looked 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 correct, the better way to do it is to use the ch= annel combiner plugin to copy the Max RGB value to the alpha channel.
<= br>
Try using that instead of shift channels and see if you get d= ifferent results. =C2=A0


On 10 Apr 2018, at 11:37 am, Roei Tzor= ef <AE-List= @media-motion.tv> wrote:

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

a simple test conf= irms this.=C2=A0examples here:
<= br>
AFAIK, the only way to unmul= t accurately in Ae is to use any of these 3rd party plugins: Knoll 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 RGB is pres= erved entirely, but this isn=E2=80=99t accurate.=C2=A0 You need to use the = remove colour matting plugin as well, which then takes the background colou= r 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's Umult - Alpha from Lightness (Unmult) prese= t) 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 black solid, adding a lens flare effect, then trying to unmult= .=C2=A0

another free option exists in the VC Color Vibra= nce plugin which is free by video copilot:=C2=A0

simply change the color = to 0 to have no effect in color, and change "matte alpha" to &quo= t;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 Alp= ha from Luminance) and muck about 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?


+---End of message---+
To unsubscribe send any message to <ae-list-off@media-motion.tv>

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