PDF Image Resolution

khuon mau
I'm having a difficult time meeting a printers requirements and I thought I'd ask if there was any way to tell what the image resolution is on a PDF file.
The images are 300+ when I create the pdf (from Adobe Illustrator CS3), based on their creation instructions, but when I submit they say the images are not high enough quality.
Thanks in advance for any help.
Micah

With the preflight tool in Acrobat you can check the resolution of the images in the PDF document.

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I am currently working to perform some maintenance for an app that formats and resizes documents, usually PDFs. The problem happens when certain files are uploaded with an unusually large image resolution (according to the Preflight Properties, 2222.222/2222.222 pt/in). The documents with this resolution come in with file sizes of 36"x24" and end up formatted to 8.5"x11". This leaves the text and a lot of information unreadable.
I am using Visual Basic with iTextSharp to interact with the PDFs that come in. I'm able to find the width and height in points of the document without issue. Finding the image's width/height pixel count is what is giving me fits.
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I hate to reply again, but I'm still stuck. I've been through the SDK and documentation and have had no luck finding anything to help solve this problem. I don't really need to extract the image per se, I just need to find the resolution of it. Could you possibly point me in a definitive direction in the SDK/Documentation that I could use? There are a couple examples that deal with Preflight but none dealing with the image in the PDF or its properties.
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I am using Acrobat Pro XI. I added a 600 dpi image to my PDF file. When I click on it and copy a chunk of it, then paste it into paint, the image resolution is 96 dpi. How can I tell the resolution is of images in my PDF file? I am trying to keep at least 300 dpi image resolution. Thank you for any help in understand this.

then paste it into paint, the image resolution is 96 dpi
That's the consequence of using the OS's clipboard.
A PDF can have image content of different resolution.
You can look in the application's Preferences - Convert to PDF - [select one of the supported image file formats] to observe settings.
Some are user configurable.
Basically if you insert "x" ppi that's the resolution of that image that is not on the PDF page.
Be well...

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Hi..,
     I am the beginner in Photoshop.
     I want to change one image resolution from 72 dpi to 300 dpi.
     So, I search and got one pdf for change the resolution of the image. In that they mention, take the "Printscreen" of the image and paste in the photoshop and change the mode(Index - flatten) and change resolution via the "Image -> image size -> Resolution".
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     After that I Open one already saved image file in Photoshop and do that same steps but the resolution was not changed.
So, now how to change that saved image resolution to 300 dpi...??
Regards.,
VISWA

Viswa,
To find the current resolution of your image, follow these steps:
With your image open in Photoshop, Image > Image Size (Like you've already done earlier).
Check the resolution as shown above. If it doesn't show 300, enter 300, hit OK and 'Save' your image.
Open the file and check again. If it still shows 72, post back with more details of the type of file you're trying to open in Photoshop and if possible, a screenshot so we can help.
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I'm sorry what I mean if a pdf have 35 images I would to see the image resolution of all of them independently if they are 72 or 600 dpi.

Continuous tone image resolution lower than specified

The following message was posted in the incorrect forum; no legitimate solution to the problem was ever posted. I am re-posting it, as this is the same exact problem I am having, right down to the OS and version of Acrobat. Could someone please explain to me what this means and whether or not I should be concerned about it? I will also get two different kinds of results... one is a single number effective ppi on this error, such as 199, (which results in 200ppi if run through PitStop), and a two-number effective ppi, which we haven't been able to decipher, such as 501.357/179.55ppi (which should be a hi-resolution image).
Help?
Amy Carolyn Watson
>
>
>Nikola Viereckel - 09:45pm Dec 9, 2007 Pacific
>
>Hi - I have recently discovered the above error message when I
>check my distilled press quality pdf in preflight. I am using
>a PC and Version 7.0 of distiller and acrobat. The images are
>300dpi and are in my documents at 100% or lower, so there should
>be no resolution issues. The pdf itself looks fine, but the
>preflight does not. I find if I export out of InDesign (CS2)
>then I do not get the same error message, but this is not my
>preferred way to create pdfs for print.
>
>Any ideas? I the only thoughts I have had is to reinstall
>the program. Thanking you in advance for your help.
>Cheers
>Nikola

> All text should export as vector, since it's all on a layer above any kind of image.
Is there any transparency in the text, though? If you float text over
an image with transparency, it MUST be exported as an image. If it is
floated over vector art with transparency, it MIGHT.
It's easy to assume that just because something is on top, it doesn't
ever need to be flattened. This is not in fact true.
>
>I am a little concerned: is this a flaw in the Acrobat Program?
You mean in its preflight? Unlikely, it isn't rocket science to
calculate ppi, so the numbers are probably right.
>
>Where is this "Continuous tone image resolution" turned on/off? Why is it important?
That's probably a reference to Distiller settings. I think we've
established that you aren't using Distiller.
>
>Is InDesignCS2 flattening to low transparency settings, even though my settings dictate high?
You'd probably need to ask in the InDesign forum. But bear in mind
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Hi Forum,
I have tried to get alert for the links if it has 250 or 300 resolution. But if the pdf is placed, the script is replying error message.
"object does not support the property or method actualPPi"
How can i omit the check for PDF and continue to find other images resolution and alert.
var doc = app.activeDocument;
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hi -hans-
thanks for the quick reply,
on the flip side of it, it tried to check only for the "Grayscale" images. please see and if you can help on this...
var doc = app.activeDocument;
var graphics = doc.allGraphics;
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