RE: Spectral sensivities
RE: Spectral sensivities
- Subject: RE: Spectral sensivities
- From: Roger Breton <email@hidden>
- Date: Tue, 15 Mar 2016 15:03:27 -0400
"sin 4", is that "Sinar 4"? Some kind of Sinar software, Edmund?
/ Roger
-----Original Message-----
From: colorsync-users-bounces+graxx=email@hidden [mailto:colorsync-users-bounces+graxx=email@hidden] On Behalf Of edmund ronald
Sent: 15 mars 2016 14:21
To: Ben Goren <email@hidden>
Cc: ColorSync <email@hidden>
Subject: Re: Spectral sensivities
sin 4
On Tuesday, March 15, 2016, Ben Goren <email@hidden> wrote:
> On Mar 15, 2016, at 9:39 AM, Roger Breton <email@hidden
> <javascript:;>> wrote:
>
> > Is there a (simple) way to get at a particular camera sensors
> > spectral
> sensitivities?
>
> Simplest is to get it from somebody else.
>
> Cheap is to build your own large-sized spectroscope, photograph a
> spectrum, and combine it with various other measurements and math and
> what-not. I still need to type up and post instructions and plans and
> what-not. But the basic idea is that if you know the SPD reaching the
> sensor (which is a product of the illuminant and the efficiencies of
> everything between the illuminant and the sensor -- presumably, just
> the diffraction grating and the lens) then you can treat the rainbow
> image as a standard chart image to get your RGB values. Assuming the
> sensor is linear (a good assumption if your capture technique is
> impeccable), that's your spectral sensitivity.
>
> Cheers,
>
> b&
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