[sudo-discuss] Spectral Response Curves

[StCredZero]

On Tue, Nov 12, 2013 at 10:05 AM, Steve Berl <steveberl at 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.)
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