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04-20-2011, 06:46 PM   #1
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Help! Newby question re: K-m image size

I usually shoot JPG. Whenever I edit an image in PSE, I see something referring to what I think is the image size in MB, e.g., 28.7. But when I save it, I see it as something much smaller. I'd like to sell some of my images, but there is a lower size limit on the site I want to use (24 MB), and I don't want to have my pictures rejected because I don't have them at least at the 24 MB size. Is there something in the camera itself that I should be changing to keep the image from being compressed?

04-20-2011, 07:28 PM   #2
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A 24mbyte jpeg is... huge. Your camera won't produce a 24mb RAW file, much less jpeg, which is always compressed (just to varying degrees, depending on your selection of quality.) What site are you using that requires 24mb?

Paul
04-20-2011, 07:36 PM   #3
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Hi, Paul. I'm considering Almany:

Preparing Images & Submission Guidelines | Alamy

My question comes from the submission guidelines (should I be converting from a JPG to a TIF then back again?)
04-21-2011, 09:18 PM   #4
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Not familiar with the software you're using. But what is displayed is probably the uncompressed (decompressed) size.
10MPixels times a number of bits per colour channel times number of colour channels will get you roughly to those values.

I just checked my K5 jpeg images in Irfanview; every single one is the same size (46.02 MB) regardless of content. Stored on disk they vary from roughly 7MB till 12MB

From reading the requirements on the site you mention, it clearly states uncompressed filesize (read 'decompressed filesize'). So you should be OK from that perspective (28.7 is bigger than 24).


Last edited by sterretje; 04-22-2011 at 10:10 AM.
04-22-2011, 06:29 AM   #5
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QuoteOriginally posted by Garlic Capital Newby Quote
I usually shoot JPG. Whenever I edit an image in PSE, I see something referring to what I think is the image size in MB, e.g., 28.7. But when I save it, I see it as something much smaller. I'd like to sell some of my images, but there is a lower size limit on the site I want to use (24 MB), and I don't want to have my pictures rejected because I don't have them at least at the 24 MB size. Is there something in the camera itself that I should be changing to keep the image from being compressed?
The only file type you could save to produce this size would be a TIFF... or have a 20+ Megapixel camera...

For PSE go here and post this same question, will probably get a definitive answer: Elements Village - Powered by vBulletin
04-25-2011, 07:10 AM   #6
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Thanks!
04-28-2011, 12:04 AM   #7
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Under 'We Need', their website says:
    • Alpha-numeric file names ending in .jpg.
    • RGB files, not single channel greyscale or CMYK.
    • Uncompressed file sizes of more than 24MB. This means you should make your JPEG file from an 8 bit TIFF file that is at least 24MB. If you have a camera that is capable of producing an uncompressed 8 bit file of over 24MB then leave it that size.
I think it could have been put more clearly. However I'd say they are hinting at:

1) shot RAW
2) save your edited results as TIFF / PSD / some other unlossy format
3) save a hi-quality JPG version for uploading

If you are shooting JPG make sure the camera is taking the largest possible image at the best possible quality. It is quite clear they want hi-quality JPG files, JPG is a compressed file format, so the size of the JPG file is never going to be 24MB.

Also read the bits further down about the IPTC information.
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