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 PostPost subject: Biggest possible Jpg?        Posted: Thu Jul 23, 2009 4:11 pm 
Whats the biggest theoretically possible Jpg file? I mean, I havent found anything bigger than this here at all -->
http://dic.academic.ru/pictures/dewiki/ ... nantes.jpg
(DSL and especially 56K warning!!! :P)


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 PostPost subject: Re: Biggest possible Jpg?        Posted: Thu Jul 23, 2009 4:19 pm 
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The world's largest JPEG image is being kept on magnetic tape in a research laboratory in Palo Alto, California. The image measures 2,147,483,647 pixels wide by 2,147,483,647 pixels tall, and contains nothing but the color black.

If you wanted to print out the entire image on your new 600-dpi (dot per inch) laser printer, you'd need a sheet of paper over 50 miles-by-50 miles. "Though why, of course, you'd want to waste all of the toner is beyond me," Dr. Whoobint of the Palo Alto Institute for Really Useless Things commented. "You might as well use paint."

The image represents an advance in photographic technology, also, as each pixel corresponds to a real-world space about the width of a photon at the shutter aperture. In other words, Dr. Whoobint explained, "this picture contains absolutely all of the resolution that it's going to get."



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Last edited by OG on Thu Jul 23, 2009 4:25 pm, edited 2 times in total.

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 PostPost subject: Re: Biggest possible Jpg?        Posted: Thu Jul 23, 2009 4:22 pm 
Wow, thanks for that! :)


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 PostPost subject: Re: Biggest possible Jpg?        Posted: Thu Jul 23, 2009 4:28 pm 
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There's a few more here. I think the black one is sort of cheating to be honest as its not really an image. The 17 gigapixel (95 gigabytes) Yosemite one would look nice on a wall in your porn stars mansion don't you think? :D And as any image can be jpg, I guess this would be more about the largest resolution digital image than the largest jpg.

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 PostPost subject: Re: Biggest possible Jpg?        Posted: Fri Jul 24, 2009 4:15 am 
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The black image shouldn't take up much space if it was compressed? Why do they need a tape drive?

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 PostPost subject: Re: Biggest possible Jpg?        Posted: Fri Jul 24, 2009 5:29 am 
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Maybe it's the only method of storage large enough to store the image. I image it would be massive.

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 PostPost subject: Re: Biggest possible Jpg?        Posted: Fri Jul 24, 2009 10:49 am 
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Another point: if you really need to store that much image-data, you should use a flexible and fast format like TIFF with compression, not JPG.

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 PostPost subject: Re: Biggest possible Jpg?        Posted: Fri Jul 24, 2009 11:59 am 
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TIFF are generally larger than jpeg are are the quality vs size choice. This is a big black square, so can use the maximum lossy compression format and it will still look like a big black square. Also, TIFF has a 4gb filesize limit, so its useless in this case anyway.

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 PostPost subject: Re: Biggest possible Jpg?        Posted: Sun Jul 26, 2009 2:01 pm 
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Well TIFF is lossless, I wasn't aware of the 4GB file size limitation, the largest TIFF I've created was only about 1,3 GB.

Aside from BigTIFF, are there any other good formats like TIFF which can take any resolution (96-bit colours) and layers in Photoshop aside from the proprietary PSD?

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