Return-Path: Received: from mail-vc0-f175.google.com ([209.85.220.175] verified) by media-motion.tv (CommuniGate Pro SMTP 4.2.10) with ESMTP-TLS id 5022069 for AE-List@media-motion.tv; Tue, 02 Apr 2013 16:41:39 +0200 Received: by mail-vc0-f175.google.com with SMTP id hf12so499015vcb.6 for ; Tue, 02 Apr 2013 07:49:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:x-received:in-reply-to:references:date:message-id :subject:from:to:content-type; bh=dTWI+E2R9w0bgOug0ENbjJY8PIqSoci+RuWNvqbQ0Os=; b=SIk4Hy7rSzvnYM8HWOBYOiHC5kPs22rC2QxABrWKSE/uZ5c0E1R+Lu8sPEhfOQtWRG 7YXSntFnR/ayuhxZLdIXT6koiIEm6wc+3fCZf+R0NT8GB8wTmE3StyG4uIVfgp9+HT+8 EonHh2ayId+oFx4EIN49qwUl/QWRkAxe0xRRFXB6p4qpLXQN03u7wJ276TTXEqCMz6p3 TK1QA8ODZKf309ul/rAR7OEcNuCP/jBf9TcE4Eaynt+h4FQvLN4l4Y3rk64sB77VlNZa P1BPPYkF3ysT0MvueYlZ0mSGdKkocVYdnpg0rniHKsjJXwqAj96yyvcvv/13PdXVkv4c NgFQ== MIME-Version: 1.0 X-Received: by 10.52.100.5 with SMTP id eu5mr10841017vdb.66.1364914157758; Tue, 02 Apr 2013 07:49:17 -0700 (PDT) Received: by 10.52.92.169 with HTTP; Tue, 2 Apr 2013 07:49:17 -0700 (PDT) In-Reply-To: References: Date: Tue, 2 Apr 2013 07:49:17 -0700 Message-ID: Subject: Re: [AE] spill suppression From: Darby Edelen To: After Effects Mail List Content-Type: multipart/alternative; boundary=20cf3071cf9a85afc304d961d7a4 --20cf3071cf9a85afc304d961d7a4 Content-Type: text/plain; charset=ISO-8859-1 The method I just posted does not despill directly. It gives you the amount of green that despilling would remove from the image. You could set this layer to "Subtract" to remove that green from the original image. Also I wouldn't use the Darker Color blend mode for despill. Darker Color works based on the luminance of the pixel where as Darken works on a per channel basis. The results generally won't be any different (unless you've modified the R/B channels as well) but I consider Darken to be best practice. On Tue, Apr 2, 2013 at 1:46 AM, Robert Kjettrup wrote: > Hi Darby > > On my last two keying jobs i used your tip with channel mixer set to > GR:-50, GG:0, GB:-50 and setting the layer to DarkerColor with great > results, much better than the native despill in Keylight, thanks for that > tip. :-) > > Just tried this other channelmixer usage, and that i can also see as a > good alternative, but it is a bit harsher in its despill in darker areas, > more like the default despill in keylight. I setup the layer with the > channelmixer effect as a difference blending mode. Correct? it looks > correct :-) > > - Robert > > > > 2013/4/2 Darby Edelen > >> A different Channel Mixer setup can pull a good spill matte. In the case >> of a straight up average R+B spill suppression you'd zero out all the >> fields in Channel Mixer and enter for the Green channels: >> >> Green-Red: -50 >> Green-Green: 100 >> Green-Blue: -50 >> >> Then the green channel will contain the spill matte. Shift Channels can >> move that information around to use for either an Alpha or Luma matte. >> Sure it's not as easy as having a one stop solution, but it's not too much >> of a pain either :) >> >> >> On Mon, Apr 1, 2013 at 6:31 PM, Chris Zwar wrote: >> >>> Thanks for these links, I enjoyed the videos. What a shame the native >>> Cinegobs plugins are Windows only, it would be nice to be able to pull a >>> spill-matte so easily on a Mac. >>> >>> -Chris >>> >>> On 10/03/2013, at 9:55 AM, Daniel Griffin wrote: >>> >>> I've found the Green Limited by the Average of Red and >>> Blue technique very useful and has given me the best >>> spill suppression results so far: >>> >>> >>> http://ae.tutsplus.com/tutorials/workflow/advanced-spill-suppression-methods/ >>> >>> >>> Daniel Griffin >>> www.kubikafilms.com >>> >>> >>> 2013/3/9 Chris Meyer >>> >>>> Many thanks, and absolutely nothing personal, but I have a client >>>> confidentiality issue on these particular shots that I don't want to tread >>>> anywhere near. >>>> >>>> - Chris >>>> >>>> ________________________________________________ >>>> Chris Meyer | Crish Design >>>> http://www.crishdesign.com >>>> >>>> >>>> On Mar 9, 2013, at 12:48 PM, Andrew Embury wrote: >>>> >>>> I'd love to have a crack at that too Chris! >>>> >>>> Cheers. >>>> >>>> - Andrew >>>> >>>> >>>> On 2013-03-09, at 2:13 PM, Jack Tunnicliffe wrote: >>>> >>>> Chris: >>>> >>>> Can you send me a frame. I'd be curious if I could focus in on the area >>>> you're talking about. Maybe a screen grab with some arrows or pointers >>>> showing me the area as well as a frame of the original, like a tiff. >>>> >>>> Jack Tunnicliffe >>>> Java Post Production >>>> 402, 2206 Dewdney ave. >>>> Regina, SK >>>> Canada >>>> S4R 1H3 >>>> P. 306-777-0150 >>>> cell. 306-536-4321 >>>> www.javapost.ca >>>> ______________ >>>> >>>> >>>> >>>> On Mar 9, 2013, at 10:36 AM, Chris Meyer wrote: >>>> >>>> I have found the edge decontamination of Refine Matte very useful in >>>> some situations, but not all. The two shots causing me grief this week have >>>> 1) a large amount of spill across the bare shoulder/upper arm of an >>>> actress, and 2) more than half way across the shirt on the back of an actor >>>> who is turning. Unfortunately, when I increase the decontamination range on >>>> Refine Matte, it does something very ugly to the color channel information >>>> - what looks like a edge pixel repeat, instead of a simple removing of >>>> color from otherwise detailed pixels that I wish to keep. >>>> >>>> - Chris >>>> >>>> ________________________________________________ >>>> Chris Meyer | Crish Design >>>> http://www.crishdesign.com >>>> >>>> >>>> On Mar 9, 2013, at 12:41 AM, Todd Kopriva wrote: >>>> >>>> Check out the Refine Matte effect for the motion blur color >>>> decontamination. >>>> >>>> On Friday, March 8, 2013, Chris Zwar wrote: >>>>> >>>>> >>>>> >>>>> I don't know if it's technically 'spill', but motion blur is the >>>>> tricky thing to deal with when keying. If the key isn't set up well then >>>>> you can end up with footage that looks like it has a spill problem in >>>>> moving areas - actually the screen is showing through semi-transparent >>>>> regions. >>>>> >>>> >>>> >>>> -- >>>> -------------------------------- >>>> Todd Kopriva >>>> 1510 E Alder St >>>> Seattle, WA 98122 >>>> (206)437-2296 >>>> -------------------------------- >>>> "Ultimately, all knowledge is self-knowledge." >>>> - Bruce Lee >>>> >>>> >>>> >>>> >>>> >>> >>> >> > --20cf3071cf9a85afc304d961d7a4 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
The method I just posted does not despill directly.= =A0 It gives you the amount of green that despilling would remove from the = image.=A0 You could set this layer to "Subtract" to remove that g= reen from the original image.

Also I wouldn't use the Darker Color blend mode for despill.= =A0 Darker Color works based on the luminance of the pixel where as Darken = works on a per channel basis.=A0 The results generally won't be any dif= ferent (unless you've modified the R/B channels as well) but I consider= Darken to be best practice.


On Tue,= Apr 2, 2013 at 1:46 AM, Robert Kjettrup <robert@stvmayday.dk> wrote:
Hi Darby

On my last two keying jobs i used your tip with channel mixer set to GR:-5= 0, GG:0, GB:-50 and setting the layer to DarkerColor with great results, mu= ch better than the native despill in Keylight, thanks for that tip. :-)

Just tried this other channelmixer usage, and that i ca= n also see as a good alternative, but it is a bit harsher in its despill in= darker areas, more like the default despill in keylight. I setup the layer= with the channelmixer effect as a difference blending mode. Correct? it lo= oks correct :-)

- Robert
=



2013/4/2 Darby Edelen <dedelen@gmail.com>
A diffe= rent Channel Mixer setup can pull a good spill matte.=A0 In the case of a s= traight up average R+B spill suppression you'd zero out all the fields = in Channel Mixer and enter for the Green channels:

Green-Red: -50
Green-Green: 100
Green-Blue: -50=

Then the green channel will contain the spill matte.=A0 Shift= Channels can move that information around to use for either an Alpha or Lu= ma matte.=A0 Sure it's not as easy as having a one stop solution, but i= t's not too much of a pain either :)


On Mon, Apr 1, 2013 at 6:31 PM, Chris Zwar <chris@chriszwar.com&g= t; wrote:
Thanks f= or these links, I enjoyed the videos. =A0What a shame the native Cinegobs p= lugins are Windows only, it would be nice to be able to pull a spill-matte = so easily on a Mac.

-Chris

On 10/03/2013, at 9:55 = AM, Daniel Griffin <dagrial@gmail.com> wrote:

I've found the Green Limited by the Average of Red and Blue=A0technique= =A0very useful and has given me the best spill=A0suppression=A0results so f= ar:



Daniel Griffin
www.kubikafilms.com


2013/3/9 Chris Meyer &= lt;chris@crishde= sign.com>
Many thanks, and absolutely nothing per= sonal, but I have a client confidentiality issue on these particular shots = that I don't want to tread anywhere near.

=A0- Chris

________________________________________________
Chris Meyer | Crish Des= ign
http://www= .crishdesign.com

On Mar 9, 2013, at 12:48 PM, Andrew Embury wr= ote:

I'd love= to have a crack at that too Chris!

Cheers.=A0

- Andrew


On 2013-03-09, at 2:13 PM, Jack T= unnicliffe <jack@j= avapost.ca> wrote:

Chris:
Can you send me a frame. I'd be curious if I could focus= in on the area you're talking about. Maybe a screen grab with some arr= ows or pointers showing me the area as well as a frame of the original, lik= e a tiff.

Jack Tunnicliffe
Java Post Production=
402, 2206 Dewdney ave.
Regina, SK
Canada
S4R 1H3
______________
<= /span>

=

On Mar 9, 2013, at 10:36 AM, Chris Meyer <chris@crishdesign.com> wr= ote:

I have found the edge decontamination of Refine Matte very useful in some = situations, but not all. The two shots causing me grief this week have 1) a= large amount of spill across the bare shoulder/upper arm of an actress, an= d 2) more than half way across the shirt on the back of an actor who is tur= ning. Unfortunately, when I increase the decontamination range on Refine Ma= tte, it does something very ugly to the color channel information - what lo= oks like a edge pixel repeat, instead of a simple removing of color from ot= herwise detailed pixels that I wish to keep.=A0

=A0- Chris

________________________________________________
Chris Meyer | Crish Des= ign
http://www= .crishdesign.com

On Mar 9, 2013, at 12:41 AM, Todd Kopriva wrote:

Check out the=A0Refine Matte effect for the motion b= lur color decontamination.

On Friday, March 8, 2013, Chris Zwar wro= te:


I don't know if it's technically 'spill', but motion blur i= s the tricky thing to deal with when keying. =A0If the key isn't set up= well then you can end up with footage that looks like it has a spill probl= em in moving areas - actually the screen is showing through semi-transparen= t regions. =A0


--
--------------------------------
Todd Kopriv= a
1510 E Alder St
Seattle, WA 98122
(206)437-2296
---------= -----------------------
"Ultimately, all knowledge is self-knowledge."
=A0=A0 - Bruce Lee



<= br>




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