Well, it sure takes a long time to turn the digest over, I hadn't
thought about this in months.
A consideration I ran into is that RAW files aren't just RGB, they're
more like RGGB because the sensors have twice as many green pixels as
reb and blue.
I don't remember why I stopped working on it though. I was using code
from dcraw to get the raw data. I later found an email from Dave
Coffin he sent 2/25/2016 in my spam folder, I didn't find it until
3/24/2016.
He said:
"dcraw -E -4" gets you the raw unscaled pixels;
this is mentioned in the manpage under the "-I" option.
This does not pass through any metadata, such as the
filter pattern, that you would need to correctly decode
the image.
Dave Coffin 2/25/2016
Filter pattern here refers to the RGGB thing I think.
Maybe it was discovering that my monitor has much more backlight at
the bottom than elsewhere, messing up photos taken of the screen. No
idea really.
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