7 Replies Latest reply: Nov 20, 2012 9:34 AM by Eilert
Eilert Level 1 Level 1 (0 points)

When "reduce file sizes" is invoked, image quality degrades substantially, even for onscreen viewing.  Is there a way to control image quality when file sizes are reduced, such that onscreen viewing quality is good for creation of PDF files?


Mac Pro, Mac OS X (10.6.8)
  • 1. Re: problem with reduced file sizes option in Pages
    Barry Level 7 Level 7 (29,180 points)

    The greatest percentage of file size, in most cases, is the size of the included images. "Reduce File Size" works by reducing the resolution (and consequently, the file size), on these images.

     

    The only way I'm aware of to control the image quality is to do the reduction outside Pages, in iPhoto, or a similat application.

     

    Regards,

    Barry

  • 2. Re: problem with reduced file sizes option in Pages
    Eilert Level 1 Level 1 (0 points)

    Thanks, Barry.  I think this is just a limitation of Pages, it seems.  (my reference point is In Design, which is used by a friend of mine, and so I find out things talking to him)  I need to create the doc for printing, and I realize I could make the files smaller if I were just laying it out for the web, but I don't want to have to do everything twice, unfortunately.  I was hoping there would be a preference panel or such which would allow control of the reduced file size, but it seems no luck there.

     

    Eilert

  • 3. Re: problem with reduced file sizes option in Pages
    PeterBreis0807 Level 7 Level 7 (29,645 points)

    The Pages Help and Manual mention the reduction is to 72 dpi for images which is very low, to produce the maximum file size reduction.

     

    You can use Preview .app to both crop and reduce the resolution of the images, then place them into Pages. Usually 150dpi at the used scale is a happy compromise.

     

    Cropping often does a great deal to reduce file size because "Reduce File Size" does not crop away the unseen portion of the image which adds unnecessarily to file size.

     

    Peter

  • 4. Re: problem with reduced file sizes option in Pages
    Eilert Level 1 Level 1 (0 points)

    Thanks, Peter.  The idea of pre-cropping makes sense.  My problem is that when I am formating a page with mostly photos on it, and I am struggling to figure out how to arrange them in some kind of decent order, I end up cropping on the fly, and so I cannot anticipate just what crop will ultimately work ahead of time, unfortunately.  I do use quite modest jpeg quality (usually about 6), and with down-sizing, files sizes are typically in the 150 kb range, which I feel is minimal.  However, once in a while I am provided with a large pdf file which stays large so far.  (8-page newsletter)  Probably need to convert it to a jpeg to control file size, and I have done that on ocassion.  I just wish there was a parameter which the user could control when the resizing of the images was carried out to minimize the pdf file size....   It would be painful to have to go back and recrop the images after the document was formated.

     

    thanks again,  Eilert

  • 5. Re: problem with reduced file sizes option in Pages
    PeterBreis0807 Level 7 Level 7 (29,645 points)

    Sounds your images are taking a double hit. The initial low quality setting and the downsizing to 72 dpi.

     

    Try using the images at best quality and then letting Pages downsize them.

     

    An 8 page newsletter is quite manageable for image replacement pre-publishing. Be systematic and use this method:

     

    click on cropped masked image in Pages > Copy > switch to Preview > command n > Save as > Format: Jpeg > Quality: near best (default) > Resolution: 150 (default) > OK > Copy > Paste back into Pages

     

    Peter

  • 6. Re: problem with reduced file sizes option in Pages
    Mr Hopeful Level 1 Level 1 (0 points)

    Ignore the Reduce File Size option inside Pages.

     

    Using Pages you might experiment with File>Export>PDF> Good/Better/Best

     

    BEST size is the largest and highest resolution. Better and Good compress the images.  Compare the relative sizes using CMD-I.

     

    good luck

  • 7. Re: problem with reduced file sizes option in Pages
    Eilert Level 1 Level 1 (0 points)

    Hi Hopeful!

     

    I like your suggestion!  I had been simply using the PDF print option from the print panel, didn't consider using the export function!  Using the "better" option, the web view quality was just fine, and file size was 1/2 of the "best" option.  "Good" was pretty mediocre.  Appreciate your suggestion!!

     

    Eilert