How to standardize image quality?

I am working in an INDD (CS 5.5) file and have placed into it EPS graphics that use layers of color at various transparencies. I embedded all the EPS links into this INDD file, then exported it as a PDF. The AI (CS4) file in which I created the graphics, the INDD file, and the PDF (CS5.5) are all in CMYK mode. For some reason, some of the images in the PDF appear washed out, with small dots at various edges of the image. I'm stumped--any ideas as to what the root problem could be?

Asley,
in addition to John's comment:
EPS doesn't ever contain layers with variable transparency (besides ordinary
transparency in areas, where no objects are placed).
Exporting AI files as EPS results in flattening. This is not generally wrong,
but it should be done deliberately.
For your workflow it's probably recommended to use AI files in ID.
A very different question is then, whether the ID file should be flattenened,
exporting as PDF. In my opinion it's recommended, because the result can
be checked by you. Flattening at RIP level may cause shifts which are not
under your control.
I'm aware of the cheap advice 'if your printer is not able to handle Adobe files
with live transparency correctly, the find a better one'.
By the way: I'm using regularly EPS for graphics which are programmed
directly in the programming language PostScript.
Best regards --Gernot Hoffmann

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Geoff the kiwi wrote:
Agfaclack - no need to even mention PS for this, it is only confusing.
i don´t think so.
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*For Users of 10.5 Only*
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Uploaded with plasq's Skitch!
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*For users of 10.4 and 10.5* ...
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price as the Apple 20" Cinema display. Unless the
image quality would be significantly worse, this
would seem to be the better option as I could also
watch TV or hook up a video game console as well. I
could kill two birds with one stone and get both a
better TV and monitor than what I already have, with
just one purchase.
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For the individual images, don't worry about the ppi or as you call it dpi (ppi is the correct term BTW) only worry about the pixel dimensions. If the pixel dimensions gets too low, it will look horrible as there is not enough data to work with.
Therefore the final document that will house all the other images must be large enough in pixel dimensions to handle the smaller images at a high enough dimension that they will look good.
That being said, if you can load your images in as smart objects as any scaling that takes place samples the original sized document. Making it possible to scale it down to a size that is barely visible and then reset the size back to where it was and have no loss of data.
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If your collage will span more than one page, you may want to do this in InDesign. All images are linked to their respective container (similar process as smart object in theory) Though I beleive smart objects are embedded which is debatable.
In both InDesign and Illustrator, scaling the image in the document affects the ppi of the image, scaling down would increase the ppi whereas scaling upward would decrease the ppi as the number of pixels (the pixel dimension) has not changed.
With photoshop, you have a choice, when scaling the entire document, you have the option to resample the image, doing so affects the pixel dimension and in that instance would degrade the image when scaling downward and bluring the image when scaling up. As photoshop is removing pixels when scaling down and guessing the neighbor pixels should be when scaling upward.
But, when resampling is off, the pixel dimensions do not change and therefore there is no degration or bluring.
Why this happens has to do with simple math.
inches x ppi = pixels
Knowing any two of the above forumula will give you the third.
When resampling is enabled, the pixels can change and when it is disabled, it is fixed so only the other two values can change.

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Hi,
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I know that this iMac was prior to videos becoming common online and I know that I have to sacrifice video quality.
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I've been sent a scan of a document as an attachment. Clicking on it, I get the message, "Pixel aspect ration correction is for preview purposes only. Turn it off for maximum image quality." What is pixel aspect ration and how do I turn it off?

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Example in next post

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