Checking image dpi in a pdf file
I'm trying to publish a book on one of the print-on-demand sites. I submitted the cover and got the message "The cover file contains images at 150 DPI, which will appear blurry and pixilated in print. For optimal printing, we recommend all images be at least 300 DPI."
Given my pdf for the cover, how exactly do I go about checking what the image resolution is? I'm not sure where the problem lies and don't have a way to know when I've solved it. A web search hasn't turned up anything I can use.
tia, bill
Given my pdf for the cover, how exactly do I go about checking what the image resolution is? I'm not sure where the problem lies and don't have a way to know when I've solved it. A web search hasn't turned up anything I can use.
tia, bill
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ok. I didn't find "List page objects, grouped by type of object" but under "Page Description" I was able to check images by resolution. I think I identified the images with low resolution.
The image resolutions are given in ppi. How does that relate to dpi? I've seen ppi defined as pixels/inch, but in Acrobat, it's given as pt/inch. Points per inch? Is this "point" as in a pixel in an image, or "point" as in the typographic unit of measure? The latter doesn't really make much sense.
The image resolutions are given in ppi. How does that relate to dpi? I've seen ppi defined as pixels/inch, but in Acrobat, it's given as pt/inch. Points per inch? Is this "point" as in a pixel in an image, or "point" as in the typographic unit of measure? The latter doesn't really make much sense.
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Thx ... and sorry for the delay in closing this.
ASKER
I used Visio to create the cover. On part of it, I embedded a MS Word object for the blurb on the back. That object contained a photo.
I generated the pdf using the AABBY converter (Visio also has one built it, but doesn't seem to offer control over resolution).
Now if I check the resulting PDF using Acrobat 9's preflight, will it tell me the resolution of the photo, since in a Word object contained in Visio?
So, this question might be impossible to answer ... but thot it'd be worth a try ...
-- Billl