[argyllcms] Re: Metameric Mismatch
- From: Brad Funkhouser <brad.funkhouser@xxxxxxxxxxx>
- To: "argyllcms@xxxxxxxxxxxxx" <argyllcms@xxxxxxxxxxxxx>
- Date: Mon, 13 Oct 2014 11:23:19 -0500
Alright, that's a bold undertaking. I already own a diffraction grating.
Thanks.
- Brad
> On Oct 13, 2014, at 10:01 AM, Ben Goren <ben@xxxxxxxxxxxxxxxx> wrote:
>
>> On Oct 13, 2014, at 7:49 AM, Brad Funkhouser <brad.funkhouser@xxxxxxxxxxx>
>> wrote:
>>
>> I wonder what targets camera manufacturers use for testing the spectral
>> response curves of their sensors?
>
> They are almost assuredly not using reflective targets but rather typical
> tunable monochromators.
>
> And, even then, the hard part isn't generating the monochromatic light...it's
> measuring the _intensity_ of the monochromatic light you're generating. All
> sorts of chicken-and-egg problems abound that make the standard laboratory
> equipment used for this sort of thing not exactly cheap. Then, just to put
> the icing on the cake, they're likely going to be doing this at all sorts of
> intensities, possibly including some relatively bright ones at some point.
>
> However, if you've already got an i1 Pro or similar spectrophotometer and
> you're just looking to profile an existing camera rather than design and
> engineer the whole system, it should be possible to do the rest on the cheap
> -- limited, of course, by the specifications of the i1 plus all the other
> sources of error you're going to introduce. That's the project I'm working on
> now....
>
> Cheers,
>
> b&
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