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#1
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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 |
#2
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Help with compression research (Need sample images)
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...) 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? 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? Just D. "Sachin Garg" wrote in message oups.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 |
#3
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Help with compression research (Need sample images)
On Jan 26, 12:41 pm, "Just D" 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" wrote in ooglegroups.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 |
#4
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Help with compression research (Need sample images)
On Jan 26, 7:30 am, "Sachin Garg" wrote:
[snip] 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. [snip] Here are some sources: http://www.dimagemaker.com/specials/...s/camtests.php http://www.glasslantern.com/RAWpository/ http://digikam3rdparty.free.fr/TEST_...AW/HORIZONTAL/ -- Barry Pearson http://www.barrypearson.co.uk/photography/ |
#5
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Help with compression research (Need sample images)
On Jan 26, 1:49 pm, "Barry Pearson" wrote: On Jan 26, 7:30 am, "Sachin Garg" wrote: [snip] 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. [snip] Here are some sources: http://www.dimagemaker.com/specials/...s/camtests.php http://www.glasslantern.com/RAWpository/ http://digikam3rdparty.free.fr/TEST_...AW/HORIZONTAL/ -- Barry Pearson http://www.barrypearson.co.uk/photography/ This looks like exactly what I was looking for. Thanks a lot :-) While this solves my requirements, any more pointers/contributions are still welcome. Thanks again, Sachin Garg [India] www.sachingarg.com | www.c10n.info |
#6
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Help with compression research (Need sample images)
"Sachin Garg" writes:
While this solves my requirements, any more pointers/contributions are still welcome. Go to the Space Telescope archive, and find the FOC images sets of SN1987A, 4044 I think, but check. Down load them and have fun. They are the most compression hostile images I've ever come across! |
#7
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Help with compression research (Need sample images)
On Jan 29, 7:23 pm, Paul Repacholi wrote: "SachinGarg" writes: While this solves my requirements, any more pointers/contributions are still welcome. Go to the Space Telescope archive, and find the FOC images sets of SN1987A, 4044 I think, but check. Down load them and have fun. They are the most compression hostile images I've ever come across! Hmmm, that will be interesting. While my immediate interest was to focus on usual photographs, it won't hurt to see if there is a breakthrough waiting to happen there ;-) Or it will atleast help as as worst-case analysis. Thanks Sachin Garg [India] www.sachingarg.com | www.c10n.info |
#8
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Help with compression research (Need sample images)
On Jan 29, 7:23 pm, Paul Repacholi wrote:
"SachinGarg" writes: While this solves my requirements, any more pointers/contributions are still welcome. Go to the Space Telescope archive, and find the FOC images sets of SN1987A, 4044 I think, but check. Down load them and have fun. They are the most compression hostile images I've ever come across! I tried looking for this but lost my way big time :-) Can you please guide me where exactly to go? Sachin Garg [India] www.sachingarg.com | www.c10n.info |
#9
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Help with compression research (Need sample images)
"Sachin Garg" writes:
On Jan 29, 7:23 pm, Paul Repacholi wrote: "SachinGarg" writes: While this solves my requirements, any more pointers/contributions are still welcome. Go to the Space Telescope archive, and find the FOC images sets of SN1987A, 4044 I think, but check. Down load them and have fun. They are the most compression hostile images I've ever come across! I tried looking for this but lost my way big time :-) Can you please guide me where exactly to go? Not anymore! e-mail the help address for the archive. You want the pre-costar set of SN1987A from the Faint Object Camera. I think the data set ID is 4044, but don't bet on it. |
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