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Thread: How to reduce the Size of the image files?

  1. #1
    Join Date
    Feb 2009
    Posts
    123

    How to reduce the Size of the image files?

    I have some images that are scans of negatives whose size are about 20mb each.I have them cropped to 4x6 but places like dot photo and Wal-Mart will not let you upload images over 8mb.

    What is the best way to reduce the size of image-files?

    I have Photoshop CS2 and Microsoft picture manager.

  2. #2
    Join Date
    Apr 2008
    Posts
    4,642

    Re: How to reduce the Size of the image files?

    Since, you have the images whose size is ranging around 20mb(so large),it seems the resolution of these images are quite high.

    You may reduce the resolution of these images. Reducing resolution will reduce the quality of the image keeping the dimensions same.
    Or else if you want to keep the resolution/quality of the images as it is,
    then reduce the dimensions.
    Either one of them.

  3. #3
    Join Date
    May 2008
    Posts
    4,570

    Re: How to reduce the Size of the image files?

    You can use Photoshop to do it.

    1. Open up one of the files. (Doesn't matter which.)
    2. Open up the Actions palette. (on Mac it's Option-F9, I'm guessing in Windows it's Alt-F9 but it's also available under Window -> Actions)
    3. In the Actions palette, choose to create a new action (either click the notepad looking button at the bottom or click the arrow on the right of the window and choose "New Action")
    4. Type a name and click Record
    5. Now in the Actions window, the record button should be active (red)


    You now have two options as to what you can do.
    You can either:
    -resize the images and save them, or
    -resave the images and enable some JPEG compression


    A. If you want to resize the images -
    (If you don't know this already, I'll tell you how)
    Image -> Image Size
    You can type a new size either by pixel dimension or document size, but I'd leave "Constrain Proportions" checked/selected; you should also (by default) have "Scale Styles" and "Resample Image: Bicubic" selected/checked.
    Click OK in the Image Size window.
    Save the document and close it. (Skip ahead to #6.)

    B. If you want to resave the files and enable JPEG compression -
    Either do File -> Save As or hit Open-Apple + Shift + S on Mac (or Control + Shift + S on PC) and select JPEG as the format. Click OK.
    Under "Image Options", move the slider to a desired compression. The best way to figure out what you need to do in order to make a smaller size yet keeping the best image quality possible - pay attention to the file info at the bottom of that window. It should say "Size" and then list it. Pick a good size and click OK. Close the document.

    6. You can now go back into the Actions palette and click "Stop Playing/Recording" (looks like a stop button, obviously).

    At any time during recording you can check the Actions palette and expand the listings to see what it has recorded. For instance, if you do resize, it should say you resized it to x pixels or x inches, or for resaving the file, it will say that it saved as JPEG with x compression.

    Now, you're set.

    Go to File -> Automate -> Batch
    Under "Play" choose the name of your recording (ie "resize images" or "resave images" for instance...whatever you named it)
    Under "Source" choose 'Folder' and then choose the folder where all of your images are located; it'd be a good idea to make a copy of the images folder (if possible) because it will overwrite all of those original files. If you don't want to lose the original sized ones, make a copy.
    Under "Destination" it should say "Save and Close"; if it doesn't, select it from the drop down menu
    Leave "Stop For Errors" checked/selected
    Click OK

    Photoshop will not automatically open all of the documents in that folder and resize or resave them in the same manner as you did the first one.

  4. #4
    Join Date
    May 2008
    Posts
    4,345

    Re: How to reduce the Size of the image files?

    I would recommend you to the software called Irfanview.
    IrfanView is a fast and compact image viewer/converter. It is trying to be simple for beginners and powerful for professionals. Many supported file formats and features.
    Features include: multi-language support, Thumbnail option, Painting, slideshow, toolbar skins, fast directory browsing, batch conversion/editing, multipage editing, file search, change color depth, scanning, cut/crop, IPTC edit, capturing, lossless JPG operations, effects, ICC support, EXE/SCR creating, many hotkeys, command line options and plugins.

    To download click on Irfanview

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