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What JPG format is NASA using?

Started by June 07, 2008 01:28 AM
2 comments, last by FFMG 16 years, 7 months ago
Hi, I am trying to use various editors to view the blue marble image. http://earthobservatory.nasa.gov/Newsroom/BlueMarble/images_bmng/2km/world.200406.3x21600x10800.jpg The image is over 20Mb but that should not be a problem as far as I know. Normally I would assume that the image is simply corrupted but seen that it is NASA I am not sure. How can I view/use that image? I want to use it into one of my app, but if I cannot even tell what the format is ... Can someone maybe convert it to a more standard jpg/png/gif format? Many thanks FFMG.
The uncompressed size of that image is 667,4MB. It takes a considerable amount of memory to display it with any kind of performance.

Both IE and Photoshop CS3 Extended can open the image in my machine just fine, and it seems to consist of ordinary JFIF header and stream (AKA a regular .jpg file). However, it took almost a minute to load to PS even though I have 8GB of physical memory here.

Niko Suni

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Try downloading the image in a different format.
Last time I browsed Nasa images that were free to download they offered several different formats and sizes. And yeah they were usually huge like close to 100MB if you downloaded the hi-res versions!
So just look at the filesize next time you download or get more ram for your machine like Niko or try to open the image in a different program.
Actually, after trying to open that image in several different applications I'm suprised there are still programs that cannot open or have problems with large jpg's!
Vista default image program photo gallery failed with corrupt file message.
Quicktime viewer just froze and stopped responding.
Nero snapviewer failed too.
Latest mozilla browser didn't give error or freeze but just displayed white screen?
Office 2007 picture viewer program opened it without a problem and pretty fast even. And of course acdsee image viewer and thumbsplus didn't have any problems with it either.
I'd definitely try downloading in a compressed image format if possible because another jpg file that I just downloaded at the same website balloned to 1.3GB uncompressed size from 40mb originally!
Otherwise very cool images for backgrounds or a game. Actually, they look very similar to some screenshots I've taken with Microsoft Flight Simulator X. You can zoom out to see the entire earth with the latest version.
p.s. Oh and all these test were done on an Intel 6600cpu running Vista x64 with SP1 and 4GB of ram just for sakes of comparison.

[Edited by - daviangel on June 7, 2008 4:28:54 PM]
[size="2"]Don't talk about writing games, don't write design docs, don't spend your time on web boards. Sit in your house write 20 games when you complete them you will either want to do it the rest of your life or not * Andre Lamothe
Quote: Original post by daviangel
Try downloading the image in a different format.


They only give one format for that file I think.
Either that or I cannot find others anywhere.

Quote: Original post by daviangel
Last time I browsed Nasa images that were free to download they offered several different formats and sizes. And yeah they were usually huge like close to 100MB if you downloaded the hi-res versions!


I did and it said 20Mb

Quote: Original post by daviangel
Vista default image program photo gallery failed with corrupt file message.
Quicktime viewer just froze and stopped responding.
Nero snapviewer failed too.
Latest mozilla browser didn't give error or freeze but just displayed white screen?
Office 2007 picture viewer program opened it without a problem and pretty fast even. And of course acdsee image viewer and thumbsplus didn't have any problems with it either.


I had the same kind of results here.
I am surprised that none of the apps report the actual error, (not enough memory).

Quote: Original post by daviangel
I'd definitely try downloading in a compressed image format if possible because another jpg file that I just downloaded at the same website balloned to 1.3GB uncompressed size from 40mb originally!


Thanks

FFMG

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