Yes, the tag is defined against ColorPlanes, which, in turn, references CFAPlaneColor. On 11/8/22 17:30, WAYNE BRETL via colorsync-users wrote:
I am absolutely NOT a DNG expert; this is my first reading of the spec (dng_spec_1_6_0_0.pdf).
However, a direct reading of page 84 seems to indicate that the linear reference space uses unmatrixed sensor pixel values that have been linearized and scaled to values between 0 and 1.0. So, it is still the camera signal space, but normalized. (I hesitate to call it a color space, since it has not been converted to a standard color space yet.)
Then, page 85 continues with the conversion from linear reference space to XYZ.
So, as I read it, linear reference space is unique to the camera design, and in general is not XYZ, except in the unusual case of the camera pixel filters and sensor response being designed to produce XYZ values directly.
On November 8, 2022 at 2:47 PM Jeff Nova via colorsync-users <co ir G or B)lorsync-users@lists.apple.com> wrote:
Hey there all,
It's me again, poppin up like a meerkat in your inbox. I have another DNG question... See if anyone knows...
The field *AsShotNeutral* (I sometimes misread this, but I'm sure I'm the only one) is defined as:
"...[this field] specifies the selected white balance at time of capture, encoded as the coordinates of a perfectly neutral color in linear reference space values."
Do they mean XYZ? Or are other spaces permitted? Sounds quite vague to my amateur ears.
Very best, Jeff
Jeff Nova Chief Executive Officer
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