How do I find the dpi of an image in a pdf?

I have created a pdf and have opened it with Adobe Reader XI. My book printer (prepress operator) tells me the images are coming out 100 dpi or less. I'm creating the pdf in a different way the second time. I need to check the dpi of images before I send to the book printer again. How do I do that?

Is there any way to find the image dpi in a free or low cost program?

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How can i change the DPI of an image to 400 in illustrator?

I'm very stuck with trying to change the DPI of an image to 400 so that it is ready to print and the resolution will be fine once printed but i have no idea how to do this in illustrator?

dpi,
If you are talking about a raster image placed in Illy, you can only change the size to get the desired PPI/DPI.
If you are talking about raster effects or a raster image created in Illy, you may set the desired resolution of raster effects, or the desired resolution or total pixel x pixel size of the exported/saved image.
If you are talking about pure vector artwork, the resolution depends on your printer (driver) (settings), as Doug said.

How can I find the dpi of a photo?

I am looking to do some professional printing, but when I submit a photo, I am being told it is too low
resolution and they are requesting a higher "dpi" - on my MacBook, where can I go to see what the
dpi is?

DPI depends on the size of the print. It's determined by the number of pixel in the width divided by the size of the print's width in inches.
What are the pixel dimensions of the image you want to print and what size do you want to print.
More info can be found here: The Myth of DPI.
OT

How do you change the dpi in Illustrator and save as pdf?

I've created a file in Illustrator cs4 that I need to change the 350 dpi of and to save as a pdf before having it sent out to be printed. I've found ways to change the ppi...but will that do the same thing as changing the dpi? Any advice would be much appreciated!

This might explain it
http://forums.adobe.com/thread/370714
The device has the dpi not the file itself the file has a ppi resolution the screens are prepared in lpi.
The above explains it the highest resolution I have ever been asked for was 350 ppi for offset printing 300ppi is normal.
In other word you do not control the dpi as Steve mentions.

How does one set the DPI when resizing images in Bridge?

I am sure I am missing something here (so excuse me if its a simple answer) but I am used to using Photo Mechanic and there you are able to set lots of variables while resizing. I don't understand this Bridge resizing window when using Batch Processing thru Photoshop.
-There are two boxes for sizing. If you put the same dimension in both does it just set the longest dimension to that size?
-What if I want say a 10x10 inch image at 72 DPI for web use as opposed to a 10 x10 inch image at 300 DPI for printing purposes, where does one enter that info?
Thanks,
Joshua

You don't "resize" anything in Bridge, nor does it set PPI, pixels per inch—and most certainly NOT "DPI" (Dots [of ink] Per Inch) which is exclusively a feature of the printer.
Bridge is just a File Browser. It used to be called simply the Photoshop File Browser". It doesn't open, edit, manipulate resize or even save anything.
It merely hands the file(s) over to the appropriate application, whether that be Photoshop, adobe Camera Raw, Illustrator, InDesign or even MS Word.
You wrote:
-What if I want say a 10x10 inch image at 72 DPI for web use as opposed to a 10 x10 inch image at 300 DPI for printing purposes, where does one enter that info?
Again, you mean PPI in both instances there.
You enter that in whatever application you're sending the image from Bridge.
For instance in Photoshop:

How do you add the files name to images within a PDF

I have been searching the web trying to find an answer to this question, I am not sure what the proper term is called, but I refer to it as a 'coded pdf'. Hopefully someone knows what I am talking about and can help me find an answer!
The end product is a coded PDF that has the file name of all the images lableled on top the image. For example, a product brochure that has 500 images, all of them would be 'coded' with their file name, to find easy in source files. - Is this an export option in InDesign, or an option somewhere in Acrobat?
Thank you in advance for any help.
-Melissa

No, Melissa's asking for a filename that's searchable - text made of pixels is no use.
Acrobat cannot apply the original image filenames after the PDF has been created as it can't read the information from anywhere. You have two options, both in InDesign:
use smart captions to add the name of the file in a visible format beside each image.
use accessibility tagging and place the image filename in the ALT TEXT field, then export the PDF with tags enabled (the filename will not be visible on the page but will show if you hover your mouse over the image).

How to find the dpi on iPhoto on my MacBook Pro?

I have a MacBook Pro. How can I find the dpi on iPhoto?

the first time you asked this question earlier tonight, I had it moved to the iPhoto forum. Stick with your origional post that has been moved there. Be patient

In iPhoto, where do you find the dpi of your pictures?

I am trying to send some photos to a company that requires a specific dpi to make prints.
how do i find the dpi of my photos so i can size them appropriately?

i do not understand.
I selected an image in iPhoto.
I looked to the top right menu bar and did not see an italic i in a square.
From left to right, there ia an Adobe symbol, clock, 3 dots between brackets symbol, the volume symbol, then a symbol that looks like a B covered by 3 dots (it says bluetooth when i click in it), then the wifi symbol, day, time, my name, search symbol.
I didnt understand any of the math you mention.
Could you be a little more specific?
I am trying to send images to a print company to have reproductions made but when i sent the first image, they wrote me back and said there are certain sizes they can reproduce based on the dpi of my image and what i had sent so far was not adequate. so i want to see the dpi's of my images so i know what to do about it.
Thanks!

How can I find out the dpi of an image in Acrobat.

How can I find out the dpi of an image in Acrobat. I have tried the pre-flight option but I really don't understand the pixels width x depth information that I get. I basically just want to know at dpi of a single image. Is there other program that will read my pdf file and tell me this information.

Thank you, tylerdurdain! That was ridiculously difficult to find. Not sure what version of Acrobat you're using in your image, but for those using Acrobat Pro 11 (in Mavericks), it's buried under View > Tools > Print Production.
That opens a panel on the right.
To keep from having to chase it down this way each time, right click on "Output Preview" and choose "Add to Quick Tools Toolbar". That adds a button to the top right of the toolbar.
Now you can call up the inspector with one click. Choose Object Inspector as tylerdurdain shows above, then click on the item displayed to get its properties.

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Try going there

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I had beenadvised to save the cookies I want to keep but this is beyond me.
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Forgive me but I am an old man and not real great with computers.
Thanks,
Anthony

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How do I find the dpi of an image in a pdf?

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