What does Dots Per Inch mean in regards to an image on the computer?

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  1. ThompsonPen profile image66
    ThompsonPenposted 11 years ago

    What does Dots Per Inch mean in regards to an image on the computer?

    I'm working on createspace.com to do a tester print for one of my stories, and I am stuck on the cover! I have gotten it to the size and everything that it says, but it keeps telling me it needs to be 300 dots per inch, and I have no idea what that means, and it won't "approve" my cover until it does and it's driving me insane!!!!

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  2. kschang profile image86
    kschangposted 11 years ago

    And what file did you feed it that it complained about 300 dpi? Usually only Photoshop have dpi settings.

    How big is the image? (in terms of x by y pixels, not file size)  How big is it supposed to be in terms of inches? Multiple the inches by 300 and you get the actual x by y in pixels.

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    1. ThompsonPen profile image66
      ThompsonPenposted 11 years agoin reply to this

      it was meant to be 11.95x5.79", and the pixels are 862x431.
      I don't have photoshop. I tried to find a download of it, but none I could find were free

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    2. kschang profile image86
      kschangposted 11 years agoin reply to this

      Your cover then is nowhere NEAR 300 dpi.

      You need to submit a picture that is... 1737 wide and 3585 tall. pixels of course.

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    3. ThompsonPen profile image66
      ThompsonPenposted 11 years agoin reply to this

      Thanks for the help, Friend! smile

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  3. derek gulbranson profile image79
    derek gulbransonposted 11 years ago

    DPI, Dots Per Inch, is a measurement for print medium. The screen equivalent is PPI, Pixels Per Inch. They are effectively the same thing, but one is a dot on your monitor (pixel, short for picture element) and the other is a dot that comes out of your printer.

    Your 826x431 measurement is the size of your image in pixels, or dots. So if you try to print it at 300dpi your image will be approximately 2.75" x 1.43"

    Try GIMP.

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    1. ThompsonPen profile image66
      ThompsonPenposted 11 years agoin reply to this

      I've been attempting gimp but it's a slow learning process. Thanks for the info! smile

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