12 Nov
2013
12 Nov
'13
10:35 a.m.
On Tue, Nov 12, 2013 at 10:05 AM, Steve Berl <steveberl(a)gmail.com> wrote:
Another thought. How about one of those monitor
calibration devices like
the Datacolor Spider. I've got one you could borrow. Here's an article
about how to use it with Linux.
http://www.gdargaud.net/Hack/LinuxSpyder.html
They use software called dispcal http://dispcalgui.hoech.net/
I'd guess that if you dig into the source for that you can find code to
control and read color data from the Spyder.
Nifty thought, but the kind of measurement we need can't be done with RGB
light producing devices or RGB light sensing devices. In fact, the
knee-jerk-didnt-think-it-through criticism that will be raised will use the
inherent limitations of RGB devices to try and discredit this instrument.
This is why true monochromatic sources, diffraction gratings, and
non-synthetic true pan-chromatic sensors are needed.
(It will work, because we are exploiting bandpass filters built into the
camera, so the criticisms aren't valid. But true monochromatic sources and
pan-chromatic sensors will be needed to validate and measure the true
response.)