Request - SD9 raw files

The recent SD9 threads have made me wonder about what the Foveon sensor in
the SD9 really does record, prior to the processing that the Sigma RAW
convertor software peforms on the sensor data. I have been able to produce a
RAW convertor which will dump the raw sensor data, after decompressing it,
into a 16 bit Photoshop file[1], but I don't have a good supply of raw
files. If someone could point me at a file that they a) own copyright on,
and b) wouldn't mind me experimenting with, and posting my conclusions here,
I would really appreciate it. Ideally the image would have a good spread of
colour and contain some fine detail. It would be useful if the output of
Sigma's raw convertor could be provided as well.

Many thanks in advance.

[1] My convertor is a modified version of the open source dcraw convertor at
http://www.cybercom.net/~dcoffin/dcraw/dcraw.c with the colour interpolation
removed. I can provide source code if requested.

Chris Brown

Chris, I too am working on modifying Dave Coffin's converter, using VB.NET.
I am curious what language you are working in
"Chris Brown" <_uce_please.com> wrote in message
news:jp7o61-...
> The recent SD9 threads have made me wonder about what the Foveon sensor in
> the SD9 really does record, prior to the processing that the Sigma RAW
> convertor software peforms on the sensor data. I have been able to produce
a
> RAW convertor which will dump the raw sensor data, after decompressing it,
> into a 16 bit Photoshop file[1], but I don't have a good supply of raw
> files. If someone could point me at a file that they a) own copyright on,
> and b) wouldn't mind me experimenting with, and posting my conclusions
here,
> I would really appreciate it. Ideally the image would have a good spread
of
> colour and contain some fine detail. It would be useful if the output of
> Sigma's raw convertor could be provided as well.
>
> Many thanks in advance.
>
> [1] My convertor is a modified version of the open source dcraw convertor
at
> http://www.cybercom.net/~dcoffin/dcraw/dcraw.c with the colour
interpolation
> removed. I can provide source code if requested.

james

In article <qjgmb.771$ t>,
james <> wrote:
>Chris, I too am working on modifying Dave Coffin's converter, using VB.NET.
>I am curious what language you are working in

I modified the C version. Getting an actual "unprocessed" SD9 file isn't
actually very hard - you just remove the call to foveon_interpolate() in
main() and remove the call to foveon_coeff() in insert().

You can get an unprocessed Bayer image out of the tool simply by using
archive mode, but this doesn't work for the Foveon images - it appears to do
the interpolation anyway and then convert to greyscale, hence the
modifications.

Initial results are interesting, but my supply of sample images is limited
to what I can find on the web at the moment, and there don't seem to be
many.

Chris Brown

"Chris Brown" <_uce_please.com> wrote in message
news:jp7o61-...
> If someone could point me at a file that they a) own copyright on,
> and b) wouldn't mind me experimenting with, and posting my
> conclusions here, I would really appreciate it.

http://www.imaging-resource.com/NEWS/1056750463.html sample CD may still be
available.

Bart

Bart van der Wolf

In article <3f99ac26$0$58702$>,
Bart van der Wolf <> wrote:
>
>"Chris Brown" <_uce_please.com> wrote in message
>news:jp7o61-...
>> If someone could point me at a file that they a) own copyright on,
>> and b) wouldn't mind me experimenting with, and posting my
>> conclusions here, I would really appreciate it.
>
>http://www.imaging-resource.com/NEWS/1056750463.html sample CD may still be
>available.

Looks like a good place to fall back to if I don't get any responses here.
Thanks for the link.

Chris Brown

And on the Sigma page there's an offer dated 28-Aug-2003 for a demo disk
(http://www.sigma-photo.com/Html/Cameras_sd9_offer.htm). Not sure if holds
an actual raw file though.

Bart

Bart van der Wolf

In article <3f9a4d4f$0$58698$>,
Bart van der Wolf <> wrote:
>And on the Sigma page there's an offer dated 28-Aug-2003 for a demo disk
>(http://www.sigma-photo.com/Html/Cameras_sd9_offer.htm). Not sure if holds
>an actual raw file though.

Unfortunately I couldn't find a similar page on the Sigma UK site. Wonder if
they'll send one by airmail?

Chris Brown