Fred's on top of the graphic issues. Bottom line is JPG is the way
wrong format and is adding some bloat.
However, its not clear from the OP message whether you're copying the
graphic file in, or importing by reference.
Importing by refrence is the preferred way to do it. Copying is not
the way to go.
If you are copying them in, that would be a good reason for the slowdown.
art.campbell at gmail.com
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On Thu, Oct 9, 2008 at 6:06 PM, Fred Ridder <docudoc at hotmail.com> wrote:
> Deirdre Reagan wrote:
>> Anyhow, when I add jpgs to my Framemaker file (FM 8.0, Windows XP),
>> Framemaker slows way down when I scroll over the page with the jpg.
>> The jpgs are 300 dpi, which they need to be for good print resolution
>> (they are black and white drawings).
>> I import the file to an anchored frame, then resize the graphic to 80
>> percent because it is usually too large for the anchored frame.
>> I really don't know anything about graphics, so anything advice would
>> be most appreciated.
> To cover only a couple of the most basic issues:
> First and foremost, JPEG is *not* an appropriate file format for line art
> or anything containing text. JPEG was specifically designed for
> *photographic* images, which tend to conceal many of the format's
> shortcomings due to the continuous-tone nature of photographs.
> JPEG's area-based image compression algorithm inherently produces
> artifacts near abroupt color transitions, which is clearly seen as a
> kind of gray smudginess alongside lines in drawings or as a kind of
> cloud surrounding text. For line art you should be using a lossless file
> format like EPS, WMF (or EMF), or PNG (or GIF or TIFF or even BMP).
> The one file format you should *not* use is JPEG.
> Second, if you need to scale your graphics, you should use a vector
> file format (EPS, WMF, EMF) rather than a raster file format (any of
> the others mentioned). Vector images contain mathematical descriptions
> of the geometric and text objects in the drawing, which means that
> they can be rescaled over a wide range of sizes with no loss in quality.
> Raster graphics contain a pixel-by-pixel rendering of the image, and
> to rescale them you either have to change the pixel pitch or you have
> to resample them to throw away pixels or make up new pixels that
> don't exist.
> Third, if you do have raster images (screen shots, for example), the
> best way to change their reproduced size in FrameMaker is not
> to use the scaling command, but rather to change the dpi setting.
> Doubling the dpi will reduce the dimensions to 50%; halving the
> dpi will double the reproduced size of the image. If this approach
> is not acceptable for some reason, the other alternative is to use
> a tool like PaintShop Pro or Photoshop to resample the image, but
> this *always* causes a loss in quality.
> I'll leave any other issues to others to address.
> -Fred Ridder
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