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DPChallenge Forums >> Tips, Tricks, and Q&A >> SIZING MY PHOTO FOR SUBMISSION...HELP! ASAP
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Showing posts 1 - 4 of 4, (reverse)
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Epson PhotoPC 3100Z
 08/30/2002 05:49:04 PM · #1
OK, I'M STUPID OR SOMETHING. I TAKE MY PHOTOS AT HIGH RES ON MY EPSON PHOTOPC 3100Z. THEY DOWNLOAD AT 9 megabytes, when i size them down to 640x480, they are still 899kb at 72dpi. the submission rate is 640x480 at 150kb? WHAT IS THE DEAL? I USE PHOTOSHOP 4 BY ADOBE.....SHOULD I TAKE THEM AT LOW REZ SINCE IT'S FOR THE WEB? I AM PERPLEXED OR JUST DUMB. IF YOU CAN RESPOND TO MEXICANLOVER1960@AOL.COM THAT WOULD BE GREAT.......THANKS TO ALL
Canon PowerShot S3 IS
Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)
 08/30/2002 06:01:34 PM · #2
900kb is the "Native" size for uncompressed data: (640x480x24-bits)/8 = 900,000-Bytes. If you save as uncompressed TIFF, it will be about that big. TIFF/LZW, Photoshop, CompuServe-GIF, JPEG, all use proprietary compression schemes to reduce the number of bytes used on the disk, while retaining the ability to (more-or-less) reconstruct the image.

I save my final Photoshop version as uncompressed TIFF, then use Save-As-Copy to save in JPEG mode with progresively more compression (lower number/quality) until I get a JPEG file smaller than 150kb.

--Paul

* This message has been edited by the author on 8/30/2002 6:02:37 PM.
Nikon D100
Tamron SP AF 28-75mm f/2.8 XR Di for Nikon
 08/30/2002 06:03:13 PM · #3
mex, i don't use photoshop, so i'm hoping you'll get a more detailed answer from someone else, but in the meantime, check if you have any additional settings when you save your file where you can specify the quality (1-10 or 1-00 usually). slide the quality slider down until the file size is just below 150k. usually, 85% or higher works for me in my software and you really don't see a difference.

if you have to save to see what size it saves at, make sure you don't resave the same .jpg file over and over, you loose data every time you save it. keep a separate copy of your source file and start from that one every time.

good luck! :)
 08/30/2002 07:29:54 PM · #4
lol! I did a gravestone once and resized, and resized until i got the perimeter right - believe that?!?!?!?!? Such a dummy I am ... my fam is not surprised - lol! GE and Gr8 are right tho - it's in the settings
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