URGENT Help needed with compressing pictures

Discussion in 'Mac Basics and Help' started by Stinger123, May 14, 2007.

  1. Stinger123 macrumors member

    Joined:
    Oct 26, 2006
    #1
    Hello

    I need to send an email with 4 pictures (I don't have .mac) so I'll use me yahoo mail. The pictures are about 12MB so I need to compress them.

    I put them on my desktop
    Select them all, right click, and choose "Compress arcive" (it doesn't say exactly that since my machine isn't set to english)

    It then creates a single file calles "new arcive.zip" (it looks right) but the problem is that the size does NOT change. The size of the zip arcive is STILL 12Mb and I can't mail it.

    Help please

    thanks
     
  2. epochblue macrumors 68000

    epochblue

    Joined:
    Aug 12, 2005
    Location:
    Nashville, TN
    #2
    The problem with the zip style of compression is that the algorithm it uses doesn't compress things like pictures or music well. It really works best on text files and the like.

    I'd recommend taking that zip file and uploading it somewhere like http://www.senduit.com/ and sending the resulting URL it gives you to the person instead.

    senduit has a 100MB limit.
     
  3. Stinger123 thread starter macrumors member

    Joined:
    Oct 26, 2006
    #3
    Oh - so the zip program can't zip pictures? That's good to know. Thanks a lot.
     
  4. CanadaRAM macrumors G5

    CanadaRAM

    Joined:
    Oct 11, 2004
    Location:
    On the Left Coast - Victoria BC Canada
    #4
    It can, but the nature of the data file is that it may not result in any savings. What format are the pictures in originally?
     
  5. AlexisV macrumors 68000

    AlexisV

    Joined:
    Mar 12, 2007
    Location:
    Manchester, UK
    #5
    I've just tried zipping a 74Mb TIF image and it exactly halved in size. You should see at least some compression with your zipping.

    To do things properly though, you need to resave your images as JPEGs. They just reduce to no more than 3Mb each, less if you're happy to keep them to screen resolution (72dpi).
     
  6. epochblue macrumors 68000

    epochblue

    Joined:
    Aug 12, 2005
    Location:
    Nashville, TN
    #6
    JPEG is a compressed image format. TIF is lossless and has much more meta-type data that can be compressed. When you zip a TIF, you're compressing something that hasn't really been very compressed yet. Zipping a JPEG is trying to compress something that's already compressed, you're going to get much less out of it.
     

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