Question about Dell 946 All-In-One InkJet Printer

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When scanning to pdf, files are huge compared to other scanners. it is not a resolution issue

How do I reduce the pdf file size when I scan?

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Use the PDF Optimizer
By selecting Advanced > PDF Optimizer > Audit Space Usage, you can find out which elements in your PDF (fonts? images?) are taking up the most space and make changes accordingly.

Posted on Oct 10, 2008

  • 2 more comments 
  • Priya darshan Oct 10, 2008

    Most PDF users can tell you, the main factors
    affecting the size of a PDF are image resolution, image type (bitmap or
    vector), fonts and how they're embedded, PDF version and the level of
    If you're comfortable manipulating these elements in a PDF, you're off to a good start.

    Below are a few tips to help you whip your heavyweights into bantam class performers.

    Use the Save As Command

    This is Adobe's No. 1 suggestion for reducing the sizes of your PDFs.
    When you make changes to your PDF, select Save As to overwrite the
    entire PDF. Otherwise, if you just click Save, changes are appended to
    your file, and you'll notice a slow and steady accretion of kilobytes.

    Named Destinations: Use 'em or Lose 'em
    destinations are markers that identify locations in a PDF file. Many
    PDF authors use named destinations for one document when they plan to
    link a second PDF file to a specific point in the first doc. (It's
    actually possible to deep link to a PDF file without named
    destinations. See this article for more info.) Unfortunately, every ten
    or so named destinations account for 1KB of file size. So if you don't
    need em, don't use em.

    Use the PDF Optimizer
    By selecting Advanced > PDF
    Optimizer > Audit Space Usage, you can find out which elements in
    your PDF (fonts? images?) are taking up the most space and make changes

    Manage your graphics
    Graphics are always a big
    problem when optimizing a PDF for size. First and foremost, use
    vector-based graphics whenever possible. Vector-based graphics scale
    perfectly, look better and take up less space than their GIF

    If you have to insert a graphic as a bitmap, prepare it for
    maximum compression and minimum dimensions. Don't compress the graphic
    beforehand, because distilling them in the PDF may cause the creation
    of noticeable artifacts in the image.

    To tinker with the image compression quality to size ratios,
    select Advanced > PDF Optimizer, and on the images tab select
    compression options for color, grayscale, and monochrome images. Or,
    select Enable Adaptive Compression and drag the slider to balance file
    size and quality.

    Manage Your Color
    If you're making a PDF for the Web
    and/or if you're not concerned about printing colors, use the RGB color
    space. RGB has one less data channel than CMYK, so your files will be
    that much smaller.

    Minimize Fonts
    Fonts take up a lot of space. If
    possible, don't embed your fonts. But if your document requires a
    certain look (and most do), keep the number of fonts to a minimum.
    Using subsetted fonts that only include the glyphs actually used will
    go a long way toward minimizing font size bloat.

    Watch out for version bloat
    Acrobat 5 (PDF version
    1.4) introduced JBIG2 (Joint Bilevel Image Experts Group) compression,
    which is superior to the CCITT or Zip algorithms that previous versions
    used when compressing scanned monochromatic copy. Most PDF users have
    made the switch to newer versions of Acrobat, but if you're still using
    an old copy, it may be time to make the switch.

  • Priya darshan Oct 10, 2008

    The two biggest things to look at when you want to reduce the size
    of PDF files are removing objects and downsampling/shrinking the images
    it contains.
    1. Re-create the PDF to reduce PDF file size
    A handy trick for reducing PDF file size is to re-create or ‘re-fry’
    your PDF. By creating the PDF again you can strip out plenty of
    unwanted objects, remove tags, and compress images further. You can do
    this with any tool that supports ‘print to PDF’ functionality. For this
    trick I’ll use the free free PrimoPDF print driver.

    1. Open the PDF file

    2. Open the Print dialog

    3. Select PrimoPDF from the list of printers

    4. On the PrimoPDF dialog, click eBooks. (Or to manually control the level of downsampling, choose Custom.)

    5. Click OK.

    2. Reduce PDF file size with ‘Save As’
    If you use a PDF editor such as Nitro PDF Professional
    or Adobe Acrobat you can make use of the ‘Save As’ functionality to
    trim some fat off your PDF files. Chris Dahl explained it succinctly in
    a recent post:

    PDF files have something that is called incremental
    updates, where any changes that you make to a document is appended to
    the end of the file without doing a complete rewrite. This is why the
    Save feature is much faster than a Save As, and also why PDF files
    saved this way can be large. The Save As feature will rewrite the
    entire file and provide you with a smaller file size.

    So, to shrink the PDF, do the following:

    1. Open the PDF in your PDF editor

    2. In Nitro PDF Professional, go to Nitro PDF Button > Save As. In Acrobat, go to File > Save As.

    3. Remove unwanted objects
    PDF files can contain a bunch of different objects, including
    bookmarks, links, annotations, form fields, JavaScript, Named
    Destinations and embedded fonts — all of which can be removed from an
    existing PDF file. Like tip two it requires a PDF editing tool such as Nitro PDF Professional or Adobe Acrobat.

    1. Open the PDF in your PDF editor

    2. In Nitro PDF Professional, go to Nitro PDF Button > Prepare > Optimize Document. In Acrobat 8, go to Advanced > PDF Optimizer.

    3. Choose the objects to remove

    4. Click OK

    4. Shrink all images in PDF files
    For PDF files that contain many images, downsampling all of them can make a noticeable difference.

    1. Open the PDF in your PDF editor

    2. In Nitro PDF Professional, go to Nitro PDF Button > Prepare > Optimize Document. In Acrobat 8, go to Advanced > PDF Optimizer.

    3. In Nitro PDF Professional, use the slider to select the level of downsampling. In Acrobat 8, in the images tab, specify the level of downsampling.

    5. Shrink individual images in PDF files
    If you want more granular control when downsampling you can shrink
    images one at a time and then view the result immediately. This trick
    requires Nitro PDF Professional (Adobe Acrobat doesn’t include the functionality).

    1. Open the PDF file

    2. Select the Edit Text & images tool (Ctrl+E)

    3. Double-click on an image

    4. In the Format ribbon tab, click Resolution, and then choose the level of downsampling to apply.

  • Priya darshan Oct 10, 2008

    For more information click on the blue coloured links which i have highlighted in my solution.

  • Priya darshan Oct 10, 2008

    You can also click on the below link for more help:


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How do I reduce the size of the .pdf files I make when I scan a document on my HP Officejet J4580? I get 15 page .pdfs sent to me that are half a mg in total size, but my docs, scanned at B&W or...

Hi, Brice,

Do not change anything with resolution.

After selecting Scan to PDF, click on Advance Option. Here in the new window which opens at the top you can see PDF as selected. Beside this "Options" button will be there. Click on it and a slider will appear. It will be at maximum. so you need to move the slider to minimum or closer to that and click OK Try scanning.

This will reduce the file size. This should be helpful


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Hi, you can reduce the file size by decreasing the DPI (dots per inch) or resolution of the scanned image. This can typically either be done from the scanner's control panel or from the software installed on your computer. The less DPI you set it for, the smaller your file will be.

Some scanners will also allow you to compress files. If the MFC-7840W will let you, the option would be in the software program, and it should say "enable file compression" or "enable image compression" or something similar.

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It depends also on what you are scanning....half tones, pictures etc. but the easiest way to control the file size of PDF's is to change the resolution setting. Also referred to as the quality setting. These are settings like Super Fine, Fine, Standard. It should be right on your control panel. It is the same setting you can change when sending a fax. If your default setting is Fine for example, changing it to standard will use a lower resolution and reduce the file size. In other words the higher resolution/quality setting you use make the file size much larger.
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Huge HP scanner files

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Scanned doucment at 75 is still too large - file is over 1MB

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Scanning docs & size of pdf files on Mac w/HP l7680 All-in-one

The scanner produces a "picture" of the document, much as if you laid it flat on a table and took a picture of it with your digital camera. If you did this, your .jpg from the camera would be several hundred K at a minimum - comparable to the file size off the scanner. That's why the file is so big, it contains a picture and not text data - even though it's still a .jpg file.
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Scan images file size seems very large

That entirely depends on your scan settings. The resolution has a huge impact on file size - doubling the resolution from, say. 150dpi to 300dpi actually quadruples your file size. That being said, your scans are probably saved as BMPs. If you scan to Paint or a proprietary image editor (like Photoshop), then you can save in a compressed format like JPG or PNG and reduce the file size some more.

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