On 4/29/2013 4:47 AM, SwissPace wrote:
> I had a quick look at some of my Xpro-1 raw files ... quite a bit of border
> is missing from the
> LR files which I have just discovered from viewing the aperture version.
Have you checked the image pixel sizes? I imagine you will find that LR
delivers all the camera claims.
If I recall correctly, camera specs and most converters ignore a few pixels
along each edge. This is because they cannot
be fully converted for accurate color, as some of the other, surrounding pixels
needed for full decoding of the Bayer
array are not there.That little set of border pixels are used in decoding color
for those next further in, but not used
directly as part of the image.
Soooo, they need to include them in the Raw files, for use by converters, but
they are not intended to be in converter
output.
DCRaw offers the option to produce these extra, edge pixels, so any GUI
converter/editor using it underneath has that
option, if desired. It's not really many pixels. On the A650, 3000x4000 becomes
3024x4032. I used DCRaw some time ago. I
couldn't see anything wrong with the color of the extra pixels, but I only look
closely at a very few images.
I can see why the camera makers would not include them in their specs and most
converters don't include them in their
output. All it takes is one yahoo blogging about false colors at the edge of
the image to cause endless trouble.
Assuming this is what you are seeing, I'm not sure why Apple would include it.
Edgy Moose
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