Re: Interesting Question about D2X sensors

In message <11ha4d9iv1j81c0@xxxxxxxxxxxxxxxxxx>,
Jeremy Nixon <jeremy@xxxxxxxxxxx> wrote:

> <JPS@xxxxxxx> wrote:
>
>> I just looked quickly through the latest version of dcraw.c, and it
>> looks pretty normal except for one thing; it seems to have four
>> different color filters. The scaling factors for the sensitivities are
>> pre_mul(n), where n is usually 0 for red, 1 for green, and 2 for blue,
>> with green (1) usually unstated for each camera, assumed to be 1.0. The
>> D2X has pre_mul() values for 0, 1, and 3. Very few cameras have 4
>> multiplier values.
>
>Is what you're looking at the same as the TIFF CFAPattern? If so, 3
>would be cyan. However, according to the metadata in my DNG files, the
>CFA layout is given as 0,1,1,2 (R/G/G/B), suggesting a standard layout.
>But if the values you're talking about are something else, I'm not sure
>what to look for; the difference could be in the color matrices.

It could also be that every other green has a different sensitivity.

Do you know where I can download sample RAW files?
--

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John P Sheehy <JPS@xxxxxxx>
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