[Tig] da vinci tape-to-tape, then apply to 2k files?
Mon May 1 20:49:03 BST 2006
Thanks to oktobor for supporting the TIG
On Mon, 1 May 2006, Jamie wrote:
> The un-color corrected D5 master used as a source for the tape-to-taoe
> session was created from the same tiffs we're looking to apply the color
> list to. I understand that a color list where the client viewed & approved
> the Rec. 709 result is not the same color space as the 16b native 1920x1080
> RGB tifs, but would it be very close?
The sRGB transfer curve is fairly similar to Rec.709 but not exact.
The darker shades will look darker if Rec.709 full-range RGB is
interpreted as sRGB. See Charles Poynton's "Digital Video and HDTV"
Chapter 23 for info.
If you can find a way to convert your LUTs into ICC color profiles
describing the source space (including the correction) then you can
use an ICC-compliant CMS (e.g. software using LCMS) to create the
16-bit sRGB equivalents.
The Scarse project (http://www.scarse.org/) might be of some
assistance. I have made use of the Scarse profile library
(http://www.scarse.org/goodies/profiles/) a few times, including for
converting from Rec. 709 YCbCr to sRGB. I don't see any 1.0 gamma
profiles there though.
bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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