Hi Elle -
I used the Colorchecker extensively DC-SG a lot back in the day when I
sold camera profiles; I made the profiles with Basiccolor Input (I had a
resale license) and edited mostly with a custom profile editor suite which
I wrote myself. I got these expensive targets by picking rejects out of the
trash at Gretag near Zurich when I visited; back then I provided some input
for their Passport product, and some other camera profiling issues.
If people want to do their own profiles, why shouldn't they? People in art
repro and product shooters can consider in-situ profiling to be a better
and useful form of white balance. General purpose profiles may prove a bit
harder to create, but as you suggest there is no reason to prevent people
from ... trying. :)
On Sat, Oct 15, 2016 at 2:15 AM, Elle Stone <ellestone@xxxxxxxxxxxxxxxxxxxx>
On 10/14/2016 07:09 PM, edmund ronald wrote:
The real use, I find, for measuring a CC24 is for screen and print
profiles, to check them visually one needs an image file with the measured
chart values rather than generic.
This applies to the bunch of us on list of course, probably not to the
general population ...
In past experiments I found by writing my own profiler in Matlab that
is useful for deriving accurate primaries in situ in mixed light; I
wouldn't use it for a generic profile myself.
I do wish camera makers provided a file tag with spectral sensitivity
Your uses of the CC24 seem indeed useful. I think a lot of people use the
CC24 to make a profile for each shooting session, yes?
Personally I use the Wolfe IT8 target chart for making a general purpose
camera input profile, as the Wolfe charts are affordable and make decent
profiles. Some day I would like to try using the "many patch" CC (sorry, I
forget what it's called).
The OP's original request was for how to "convert spectral reference file
that came with ColorChecker Passport to .cie file [to be used] with
scanin". Even if this information won't actually help him produce a better
general purpose camera input profile, it would be nice if someone could
tell him how to do what he's trying to do. I don't know the answer or I
would have already told him.
I've been strenuously objecting to the idea that no one should ever bother
to make a general purpose camera input profile, but instead should use RPP
profiles. Suggesting to use RPP profiles is perhaps good advice for some
people, and especially for people who already run MAC and don't understand
anything about making camera input profiles. But the OP clearly doesn't
fall into either of these categories.