2 Replies Latest reply on Jun 11, 2007 9:41 AM by Newsgroup_User

    Image Resolution

    Level 7
      Pardon me for this somewhat OT question, I am working with a CMYK image
      where the original resolution is 72dpi. Is it
      possible to 'upsample' it to 300dpi (for printing purposes) by saving it at
      the higher resolution, or is that a pointless exercise (other than to give
      me a much larger file size)?


        • 1. Re: Image Resolution
          Level 7
          Sitara Lal wrote:
          > Pardon me for this somewhat OT question, I am working with a CMYK image
          > where the original resolution is 72dpi. Is it
          > possible to 'upsample' it to 300dpi (for printing purposes) by saving it at
          > the higher resolution, or is that a pointless exercise (other than to give
          > me a much larger file size)?
          >
          >

          If by upsample you mean increase both the ppi and the pixel dimensions,
          you will lose quality, and the end result in printing may not be worth it.

          Better to start with an original file at the right dimensions and
          resolution for printing at the output size you wish.



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          • 2. Re: Image Resolution
            Level 7
            > Pardon me for this somewhat OT question, I am working with a CMYK image
            > where the original resolution is 72dpi. Is it
            > possible to 'upsample' it to 300dpi (for printing purposes) by saving it
            > at the higher resolution, or is that a pointless exercise (other than to
            > give
            > me a much larger file size)?

            Changing JUST the DPI will make the image print smaller, albeit sharper, on
            paper. You'll still have the same number of pixels.

            If you want to increase the resolution of the image AND keep the relative
            print size the same, then you need to add pixels to the image, and that will
            typically only lead to a rather blurry final image.

            -Darrel