Re: Betterlight Camera Calibration
Re: Betterlight Camera Calibration
- Subject: Re: Betterlight Camera Calibration
- From: "Stanley Smith" <email@hidden>
- Date: Thu, 02 Oct 2008 15:34:03 -0700
My thoughts exactly, but you still have to attach an HP printer to make
this system work. The more I think about this I am wondering if there
is not some "secret sauce" in HP's profile creation procedures. If they
truly are adding the spectral readings from the painting surface into
the mix of patches used to calculate the "scene referred" camera
profile, then they would have to know precisely where these
measurements were taken (down to the pixel), in order to compare the
spectral measurements to the corresponding area of the captured image.
There does not seem to be a way to do this, given the workflow diagrams
provided.
Unless these special profiles could be linked to another printer using
a device transformation, then I think that you may be stuck with the HP
(not a bad printer to be stuck with), but this is hardly a flexible
system. HP wants to sell lots of ink and paper, so this business model
probably makes lots of sense from that standpoint. However, it has been
my experience that the Betterlight generally yields really good captures
—(especially with the Northlights) requiring minimal color tweaking.
How much work is this system really saving? Especially if you factor in
the time it takes to measure 50 spots on a canvas.
Stanley Smith
Manager, Imaging Services
J. Paul Getty Museum
1200 Getty Center Drive, Suite 1000
Los Angeles, CA 90049-1687
(310) 440-7286
>>> Karsten Krüger <email@hidden> 10/2/2008 1:06 PM >>>
Am 02.10.2008 um 18:37 schrieb Stanley Smith:
> Raw files are carefully matched to the original art, and archived as
> 16-bit RGB tif files in ProPhotoRGB
So you end up with an 16bit RGB file, tagged to ProPhotoRGB.
---------
Am 01.10.2008 um 20:14 schrieb Robin Myers:
> The result of the spectral processing is an ICC profile attached to
> the original raw file.
RAW in this case is a Betterlight RGB file, not a CameraRaw CCD
pattern file like from a Canon or Nikon.
> It is a custom ICC profile for a specific artwork.
So you end up with an RGB file with an optimized ICC profile which
works ONLY for this image.
Robin, ist it possible to open this RGB file in Photoshop to convert
it to ProPhotoRGB ? Is it 16 bit ? If yes to both, I believe Stanley
has a way to get his files archived in his favourite color space using
your system.
Thanks,
Karsten
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden