Hi John,
On Thu, 11 Jan 2007 13:18:03 -0500, John Francis wrote:
>> Compiled it without any modifications for the OS/2 (or eCS :-) platform.
>> using the OpenWatcom C++ compiler
>> Works just fine.
>
>Good. I thought I knew how to write platform-independent portable
>code by now, but it's nice to receive independent confirmation.
:-)
>> I was pleasantly surprised that it supports K10D compressed PEF,
>> as well as uncompressed AND compressed DNG files!
>
>The compression only affects the layout of the actual raw sensor data,
>not the metadata, so that really shouldn't be too much of a surprise;
OK, did not know that ...
<snip>
>One thing I haven't checked is whether I got things totally right for
>PEFs from the K10D. The low-numbered tags in the MakerNote will be
>fine, but it's possible that I got the data offset wrong. Could you
>take a look at the BlackPoint/WhitePoint tags (tag codes 512 and 513)
>in one of your files, and see if they look reasonable? The BlackPoint
>should be an array of four small numbers (either zero or 127/128),
>and the white point should be four numbers somewhere around 8192
>(except the first one is more likely to be something like 12000).
That looks fine to me, I checked all three (PEF, DNG compressed DNG)
and they all are in the expected range. This is from the compressed PEF:
++++
MakerNote: BlackPoint 512 3 4 @0x000006FC 0 0
0 0
MakerNote: WhitePoint 513 3 4 @0x00000704 13312 8192
8192 9568
++++
I have that original PEF file, together with the ShowTags output
for that and two DNG files (11 megs total !) for download at:
http://www.dfsee.com/download/k10dpef.zip
<snip>
>> (unfortunately, the MakerNotes are not preserved when creating a JPG,
>> otherwise it would be easy to display the lensname on a website
>> automatically using some PHP code :-)
>
>That depends on the program you use to create the JPEG - I'm sure
>some image editors will preserve all tags from the EXIF IFD.
Well, perhaps I did not search enough, it may be there.
I just tried to use 'ShowTags' on a JPG and it did
not display anything :-)
I am using Photoshop CS2 by the way, not the 'save for web'
since that strips everything but a a regular 'save as' and then
select JPG as output. The EXIF info is there, and perhaps
the MakerNote is somewhere to be found too, will investigate
that if I find some time ...
Regards, JvW
------------------------------------------------------------------
Jan van Wijk; http://www.dfsee.com/gallery
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