Optimize to file size (image)

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  • André Næss
    #1

    Optimize to file size (image)

    Photoshop has a function called optimize to file size which tries to fit an
    image to some given file size. Because I need to make sure no images on a
    site I'm working on are larger than X KB I need something similar so that
    users don't have to worry so much about image file size. Does anyone know
    of a way to do this, preferably using ImageMagick or GD?

    Doing several calls to ImageMagick with different optimize settings is a not
    a good option.

    André Næss
    Tags: imagemagick optimize
    • Andy Hassall
      #2
      Re: Optimize to file size (image)

      On Tue, 25 Nov 2003 13:52:01 +0000, André Næss
      <andrena.spamre allysucks@ifi.u io.no> wrote:
      [color=blue]
      >Photoshop has a function called optimize to file size which tries to fit an
      >image to some given file size. Because I need to make sure no images on a
      >site I'm working on are larger than X KB I need something similar so that
      >users don't have to worry so much about image file size. Does anyone know
      >of a way to do this, preferably using ImageMagick or GD?
      >
      >Doing several calls to ImageMagick with different optimize settings is a not
      >a good option.[/color]

      I don't think there's any other alternative; there's no way of determining how
      well an arbitrary image will compress without doing at least most of the work
      of compressing it.

      --
      Andy Hassall (andy@andyh.co. uk) icq(5747695) (http://www.andyh.co.uk)
      Space: disk usage analysis tool (http://www.andyhsoftware.co.uk/space)

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        • André Næss
          #3
          Re: Optimize to file size (image)

          Andy Hassall:
          [color=blue]
          > On Tue, 25 Nov 2003 13:52:01 +0000, André Næss
          > <andrena.spamre allysucks@ifi.u io.no> wrote:
          >[color=green]
          >>Photoshop has a function called optimize to file size which tries to fit
          >>an image to some given file size. Because I need to make sure no images on
          >>a site I'm working on are larger than X KB I need something similar so
          >>that users don't have to worry so much about image file size. Does anyone
          >>know of a way to do this, preferably using ImageMagick or GD?
          >>
          >>Doing several calls to ImageMagick with different optimize settings is a
          >>not a good option.[/color]
          >
          > I don't think there's any other alternative; there's no way of
          > determining how
          > well an arbitrary image will compress without doing at least most of the
          > work of compressing it.[/color]

          Yeah I ended up definining a max width and height and forcing all images
          into 60% jpeg. This keeps me well within the limits. I'm sure there is an
          upper bound on how large a jpeg image can become if you know the max
          dimension, but I didn't bother to check.

          André Næss

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