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Image resampled

Jun 27, 2012 2:31 AM

We have a collection of Acrobat files supplied that have 300dpi images. Part of our 'preflighting' requires a FSC logo adding.

With multiple files we tend to use Pitstop with actions set up to add these details for bespoke trim sizes.

For a large number (50+) of files we may choose to create an Action in acrobat to add a created layer, flatten and save (replacing the existing file).

 

We have processed files and discovered that the images have been downsampled to 150 dpi, which makes them look awful, with all sorts of ugly artifacts bluring the whites.

 

We have looked at our actions and cant find anywhere where we are asking for the images to be compressed or resampled.

 

Can anyone shed any light on this?

 

Cheers

 
Replies
  • Currently Being Moderated
    Jun 27, 2012 10:42 AM   in reply to time18

    Have you looked at the settings of the flattener? Mine has various presets with different resolutions. Looks like you want the high resolution option.

     
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  • Currently Being Moderated
    Jun 29, 2012 4:22 AM   in reply to time18

    You said in your first post that you flattened before saving, but in your last post that you only saved. There's a huge difference. Flattening is a very important step, can change everything in a PDF, sometimes for the worse. So, what flattener settings are you using?

     
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  • Currently Being Moderated
    Jul 1, 2012 11:30 AM   in reply to time18

    You're right, I think we were confused. The kind of flattening I was thinking of was transparency flattening - a big deal. Layer flattening looks like a fairly cosmetic business of taking out the layer makers and leaving the contents unchanged, so I can't see how that would lower any resolution.

     

    Not preflighting to PDF 1.4 or PDF/X-1a or PDF/X-3 format?

     
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  • Currently Being Moderated
    Jul 1, 2012 11:59 AM   in reply to Test Screen Name

    It sounds like your layers are providing the resolution level. It may be that the flattening process you used put them together in the lower resolution of each level (a wild guess).

     
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  • Currently Being Moderated
    Jul 3, 2012 12:09 PM   in reply to time18

    It sounds very much as if some process, in Acrobat or not, is doing transparency flattening. Perhaps it was selected under the impression it was a good idea, or mistaken for layer flattening. An added vector layer sounds exactly the sort of thing to make the resolution change if transparency is flattened.

     

    Try taking the last good file and doing a transparency flattening deliberately, selecting low resolution. Compare the results to see if that is what is happening.

     
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