On 5 Feb 2006, at 21:24, Pierre-Olivier Latour wrote:
Im wondering if anyone can point me in the direction of finding
an example input file for the CIcolorcube node.
I work entirely in Floating Point with 3Dluts in Color Correction
of video and film data and need to get an example of the type of
3dLUT used by Quartz Composer so as I can transform my LUTs to
something it can use.
I can pretty much work out the format of the transform data but
need to know if composer expects a header.
An example file would be great.
The Color Cube Core Image filter cannot be used inside Quartz
Composer (the fact it appears in the list of patches is a bug). The
reason is that it expects a data object as one of its parameters
and such objects do not exist in QC world.
However, you could use the Color Cube programmatically outside of
QC and then pass the resulting CIImage to an image input of the
composition.
That doesn't actually answer the question. I've also looked and
failed to find any documentation on what the CIColourcube filter
actually does and the file format needed to use it.
Does it allow a complete 3d LUT to be applied in float space on video
using the graphics card?
If so, that's great, immensely useful to anyone in the visual
effects / film industry.
Please tell us where we can find the documentation on how to code lut
files for it.
I realise this is outside of Quartz Composer but as far as I know
there isn't a seperate CoreImage dev list and this seems to be
the best place to get core image answers.
