Help with compression research (Need sample images)

Hi,

I am a computer science researcher working on image compression
algorithms and need some large, high quality images to help with my
research.

Most of the images available online are JPEG'ed, but I need images
which were captured digitally and then saved without any loss, maybe as
RAW. (I checked the digital cameras with all my friends, but ouch! none
of them had raw saving options, only jpeg

Data compression researchers have some famous (at least among us
researchers) image sets which were released by Kodak, Jpeg committee,
and some universities over the years but they are all very old to be
used for research now. For example, they are mostly 512x512 images
with 8-bit depth. Most modern cameras can capture *much* more detail
than this, and at 12 or even 16 bits per color.

I need around 50 RAW images taken from a wide-range of digital cameras,
saved as RAW with full quality, without any loss or editing. If some of
you can pool in a few images each, I will have the set ready

I can't think of any way other than this to get around 50 full-quality
snaps from 10-20 'expensive' cameras.

(I guess most of you are professional or enthusiast photographers, and
each snap you have taken must be a piece of art for you. I don't need
any of your prized photographs, just about any good snaps will do.)

Thanks in anticipation.

Sachin Garg [India]
www.sachingarg.com | www.c10n.info

On Jan 26, 12:41 pm, "Just D" <n... DeleteThis @spam.please> wrote:
> You're happy because you're using gmail.com, it's 2-3 GBytes of email space
> now, but anyway it's looking like committing a suicide if at least a few
> people send you their images say 10 each one to your mail account then you
> will be very happy downloading all them serialized into base64 (the mail
> size will be increased say at ~30-50% because of attachment serialization)
> or something...))) Although 50 RAW, 10 mpx each, times number of people
> wanting to help you... pretty enough amount of info...)

I guess I will try to setup an upload facility at my homepage, till
then you guys can try emailing stuff. I hope gmail will handle it.

> Let me know if you get nothing in a few days to let me send my part if
> pictures...) I guess content is not so important to avoid sending you some
> unique shots? You just need a set of different pictures to play with them,
> correct?

Right, I don't need anything special. Just a bunch of images from
different cameras, saved without loss.

> And you can read RAW from your app. Btw, what about compressed RAW
> producing by Nikon D80, can you read them? Have a source code? Can post it
> to me?

For proprietary RAW formats, I can maybe use Adobe's RAW-to-DNG
converter. Then I can handle DNG using opensource libtiff or just open
it in Photoshop to save it in some other basic format, like maybe PPM.

But am not very experienced with camera raw formats so if I face any
trouble, I can always come back to this forum

> Just D.
>
> "Sachin Garg" <schn... DeleteThis @gmail.com> wrote in messagenews:1169796650.946052.243130@j27g2000cwj.googlegroups.com...
>
>
>
> > Hi,
>
> > I am a computer science researcher working on image compression
> > algorithms and need some large, high quality images to help with my
> > research.
>
> > Most of the images available online are JPEG'ed, but I need images
> > which were captured digitally and then saved without any loss, maybe as
> > RAW. (I checked the digital cameras with all my friends, but ouch! none
> > of them had raw saving options, only jpeg
>
> > Data compression researchers have some famous (at least among us
> > researchers) image sets which were released by Kodak, Jpeg committee,
> > and some universities over the years but they are all very old to be
> > used for research now. For example, they are mostly 512x512 images
> > with 8-bit depth. Most modern cameras can capture *much* more detail
> > than this, and at 12 or even 16 bits per color.
>
> > I need around 50 RAW images taken from a wide-range of digital cameras,
> > saved as RAW with full quality, without any loss or editing. If some of
> > you can pool in a few images each, I will have the set ready
>
> > I can't think of any way other than this to get around 50 full-quality
> > snaps from 10-20 'expensive' cameras.
>
> > (I guess most of you are professional or enthusiast photographers, and
> > each snap you have taken must be a piece of art for you. I don't need
> > any of your prized photographs, just about any good snaps will do.)
>
> > Thanks in anticipation.
>
> > Sachin Garg [India]
> >www.sachingarg.com|www.c10n.info