On Sun, Aug 25, 2013 at 1:10 AM, David Vincent-Jones
<davi...@frontier.com>wrote:
> I was trying to compare values in imported jpg and raw files and notice
> that when I exported both as jpg format they appear to be of differing
> size.
>
> JPG size ... 4752 x 3168
> RAW size ... 4752 x 3158
>
if you mean the other way around it's normal. the raw is a bit bigger than
the jpg. it has some 10-100 px in width and height more, to estimate black
levels and to do easy on-chip spatial filtering i would assume. the black
pixels we usually cut away very early (in rawspeed for example) and some of
the others are actually useful pixels if you go through the pain and make
your algorithms aware of the borders.
-jo
>
> Looking at the files in dt this difference is also seen. Is this a Canon
> camera 'feature' or is this something in the dt system?
>
> David
>
>
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