Re: Profiling a Leaf Volare
Re: Profiling a Leaf Volare
- Subject: Re: Profiling a Leaf Volare
- From: David Remington <email@hidden>
- Date: Mon, 24 Dec 2001 08:21:52 -0500
Does anyone know how to profile the Leaf Volare Digital Camera?
There are two issues, maybe more?, that exist: (other than eliminating
variable environmentals, i.e.: lighting, etc.)
1. the Leaf has a proprietary file format; how do you export this?
2. how do you characterize only the CCD's and bypass the image processor?
Thanks for any guidance.
I've made profiles for our Volares which work for some materials. I
use a Kodak Q-13 grayscale to check exposure and set the film curve.
I aim for 240 A, 100 M and 30 B The input value for the A patch is
fairly critical I can follow up with an exact value. I've also moved
the end point out of the pink area, 14152 I belive. These values are
calculated from patch density for a 1.8 gamma. I save this curve as
DIG standard. (Bear in mind that most of the photography done with
these cameras is flat copy work with even consistent lighting) I have
photographed and made profiles from a standard Macbeth, a DC Macbeth,
and a Kodak Q-60 using this curve and exposure. I do not use color
management in the ColorShop software. I have "camera profile" set to
none. Daniel, where did you hear that Leaf uses ProPhoto RGB? I then
export a 48 bit TIFF which opens as untagged in Photoshop. I can then
assign one of the profiles to see how well it works for that
particular image. Often I use an edited profile made for a group of
similar original material. Often I leave the file untagged, edit it
by hand, and tag it with my working space. I save the edits and can
apply them to subsequent captures as an action.
Only the HDR file is proprietary. You can save a 16 tiff. You cannot
save a tiff with out some curve applied.
--
David Remington
Photographer
Digital Imaging and Photography Group
DN-90
Widener Library
Cambridge, MA 02138
617-787-4032