Return-Path: Received: from eu1sys200aog119.obsmtp.com ([207.126.144.147] verified) by media-motion.tv (CommuniGate Pro SMTP 4.2.10) with SMTP id 4615892 for AE-List@media-motion.tv; Fri, 03 Feb 2012 22:13:54 +0100 Received: from mail-lpp01m010-f48.google.com ([209.85.215.48]) (using TLSv1) by eu1sys200aob119.postini.com ([207.126.147.11]) with SMTP ID DSNKTyxPdSXuYrm8bExbJzlifmHp05UJDHCS@postini.com; Fri, 03 Feb 2012 21:19:49 UTC Received: by lagw12 with SMTP id w12so2877592lag.35 for ; Fri, 03 Feb 2012 13:19:48 -0800 (PST) Received: by 10.152.145.7 with SMTP id sq7mr4685627lab.30.1328303988677; Fri, 03 Feb 2012 13:19:48 -0800 (PST) Return-Path: Received: from [10.170.116.230] (host-95-199-20-230.mobileonline.telia.com. [95.199.20.230]) by mx.google.com with ESMTPS id w10sm5733489lbe.14.2012.02.03.13.19.46 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 03 Feb 2012 13:19:48 -0800 (PST) Subject: Re: [AE] Inverse a LUT? References: From: Stiller Mail Content-Type: multipart/alternative; boundary=Apple-Mail-A5531480-8E1A-43E2-8B78-1BC7DEB9066F X-Mailer: iPhone Mail (9A405) In-Reply-To: Message-Id: Date: Fri, 3 Feb 2012 22:19:40 +0100 To: After Effects Mail List Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) --Apple-Mail-A5531480-8E1A-43E2-8B78-1BC7DEB9066F Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Is it really? I understand that the actual lut file is a 3d lut but isn't th= e colour operation 'just' a curve adjustment? In Nuke there is no problem to= use a Colorspace node to convert between logC and rec709, and as far as I k= now that node only handles 1d luts. So, if you just want to convert your log= o into logC color space, that shouldn't be a problem, and it will match with= the rest of the footage. But I might be misunderstanding what you want to d= o. >=20 >=20 > On Fri, Feb 3, 2012 at 10:25 AM, Byron Nash wrote: > It's a 3D LUT Simon. If I try to reverse it on the Arri site, it gives me a= 1D LUT. But I haven't figured out how to utilize the 1D properly. It gives a= LUT for each ISO I think.=20 >=20 >=20 > On Fri, Feb 3, 2012 at 4:29 AM, Simon Bj=C3=B6rk = wrote: > Correct me if I'm wrong, but isn't the color operation done with a logC to= rec709 a 1D lut? >=20 >=20 > 2012/2/3 Brendan Bolles > On Feb 2, 2012, at 7:45 PM, Brian Maffitt wrote: >=20 > > Curious if this problem will go away with digital projection? Eventually= digital projectors should be able to represent any visible color, I should t= hink. >=20 >=20 > Any visible color, as in the entire gamut of the human eye? We're a long w= ay off from that, I'm afraid. Projectors are still making images by shining= red, green, and blue light up there, so that's a major constraint. But you= 'd think they'd be able show everything we can see on a computer monitor at l= east. Maybe they can. >=20 > Ironically, part of the forthcoming IIC/ACES standard is the "Reference Re= ndering Transform", which is like a standardized film look. And like other f= ilm looks, you can't get fully-saturated colors. Similarly, I worked on the= most recent "A Christmas Carol" which is a completely digital film (includi= ng projection), and yet we still created a film look for it. Somebody think= s that people still like that film look. But I assume with digital projecti= on you can opt out if you want. >=20 >=20 > Brendan >=20 >=20 > +---End of message---+ > To unsubscribe send any message to >=20 >=20 >=20 > --=20 > -------------------------------- > Stiller Studios > Liding=C3=B6/Sweden >=20 > Simon Bj=C3=B6rk > Stiller Studios > +46 (0)8 555 23 560 > Ekholmsn=C3=A4sv=C3=A4gen 40, S-181 41 Liding=C3=B6 > simon@stillerstudios.se > www.stillerstudios.se >=20 > find us: http://www.eniro.se/query?search_word=3Dstiller+studios&geo_area=3D= liding%F6&what=3Dall >=20 >=20 >=20 >=20 >=20 >=20 >=20 >=20 >=20 >=20 > --=20 > brian higgins | senior vfx artist > Sol Design > 312.706.5500=20 > higgins@soldesignfx.com > soldesignfx.com >=20 >=20 >=20 --Apple-Mail-A5531480-8E1A-43E2-8B78-1BC7DEB9066F Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8

Is it really? I unders= tand that the actual lut file is a 3d lut but isn't the colour operation 'ju= st' a curve adjustment? In Nuke there is no problem to use a Colorspace node= to convert between logC and rec709, and as far as I know that node only han= dles 1d luts. So, if you just want to convert your logo into logC color spac= e, that shouldn't be a problem, and it will match with the rest of the foota= ge. But I might be misunderstanding what you want to do.


On = Fri, Feb 3, 2012 at 10:25 AM, Byron Nash <byronnash@gmail.com> wrote:
It's a 3D LUT Simon. If I try to reverse it on= the Arri site, it gives me a 1D LUT. But I haven't figured out how to utili= ze the 1D properly. It gives a LUT for each ISO I think. 


On Fri, Feb 3, 2012 at 4:29 AM, Simo= n Bj=C3=B6rk <simon@stillerstudios.se> wrote:
Correct me if I'm wrong, but isn't the color o= peration done with a logC to rec709 a 1D lut?


2012/2/3 Brendan Bolles <= ;brendan@fnordwar= e.com>
On Feb 2, 2012, at 7:45 PM, Brian Maffitt= wrote:

> Curious if this problem will go away with digital projection? Eventuall= y digital projectors should be able to represent any visible color, I should= think.


Any visible color, as in the entire gamut of the human eye?  We'r= e a long way off from that, I'm afraid.  Projectors are still making im= ages by shining red, green, and blue light up there, so that's a major const= raint.  But you'd think they'd be able show everything we can see on a c= omputer monitor at least.  Maybe they can.

Ironically, part of the forthcoming IIC/ACES standard is the "Reference Rend= ering Transform", which is like a standardized film look.  And like oth= er film looks, you can't get fully-saturated colors.  Similarly, I work= ed on the most recent "A Christmas Carol" which is a completely digital film= (including projection), and yet we still created a film look for it.  = Somebody thinks that people still like that film look.  But I assume wi= th digital projection you can opt out if you want.


Brendan


+---End of message---+
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--
--------------------------------
Stiller Studios
Liding=C3=B6= /Sweden

Simon Bj=C3=B6rk
Stiller Studios
+46 (0)= 8 555 23 560
Ekholmsn=C3=A4sv=C3=A4gen 40, S-181 41 Liding=C3=B6
simon@stillerst= udios.se
w= ww.stillerstudios.se

find us: http://www.eniro.se/query?search_word=3Dstiller+studios&g= eo_area=3Dliding%F6&what=3Dall










--
brian higgins | senior vfx artist
Sol  Design
<= span style=3D"font-size:11px">312.706.5500 



= --Apple-Mail-A5531480-8E1A-43E2-8B78-1BC7DEB9066F--