Finding Image resolution in PDF file?

Posted by Dave on Super User See other posts from Super User or by Dave
Published on 2011-11-21T16:22:30Z Indexed on 2011/11/21 17:56 UTC
Read the original article Hit count: 324

Filed under:

pdf

|

images

|

resolution

I have a problem of having some users creating very large PDFs. On the other hands I have PDF sent from our fax machines that are really small in size and totally printable. My question is

Is there any way I can find the resolution (DPI) of the PDF. I search the internet, could not find any answer. Checked the properties of the file, this information was not stored there, at least in my case.
What is the optimum resolution of converting text file into image PDF. 96dpi, 300dpi or more ?
Fun question. Can I resize a PDF which was scanned with high dpi into smaller dpi?

I know some answers might not be available as I have already searched the internet and could not find answers.

Note: My PDF are entirely images, text to images. I am also familiar with primoPDF (free) something you can experiment with

© Super User or respective owner

Related posts about pdf

PDF Converter wanted: Convert 8.5*11 PDF images into 600*800px PDF images for the Nook

as seen on Super User - Search for 'Super User'
I have PDF files that are maritime charts, For example this one from the Delaware Bay http://ocsdata.ncd.noaa.gov/BookletChart/12304_BookletChart_HomeEd.pdf There is a lot of detailed information in the image. When I show them on a monitor the details are shown. When I put them on the Nook they… >>> More
Loop through values and display in a pdf file

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello all! i have written the following code: As you can see there is a for loop to go through some values and display them in the generated pdf. The problem is that all the values are being written at the same place. I have tried to insert a new line but it does not seem to work. Can anyone suggest… >>> More
convert scanned images pdf file to searchable pdf file

as seen on Super User - Search for 'Super User'
I have a pdf of a scanned book. I'm looking for a free software that will perform ocr and then provide an option to save it as pdf/doc. Is there one? Thanks. >>> More
Integrate Nitro PDF Reader with Windows 7

as seen on How to geek - Search for 'How to geek'
Would you like a lightweight PDF reader that integrates nicely with Office and Windows 7? Here we look at the new Nitro PDF Reader, a nice PDF viewer that also lets you create and markup PDF files. Adobe Reader is the de-facto PDF viewer, but it only lets you view PDFs and not much else. … >>> More
foxpro to pdf and pdf to foxpro

as seen on Stack Overflow - Search for 'Stack Overflow'
how will i convert pdf database converted from foxpro back to foxpro >>> More

Related posts about images

Removing duplicate images (deduplication) - calculating "overlap" of images

as seen on Server Fault - Search for 'Server Fault'
Hello, I have a ton of product images on our file system. Our code removes 100% identical images (or does not allow them to be uploaded). However our sellers often upload items pictures which are very similar, but not exactly. They could have more whitespace, a worse quality (compression), a different… >>> More
How can I center XHTML content with CSS?

as seen on Stack Overflow - Search for 'Stack Overflow'
so I recently converted a website of mine from a table content format to a div content format. Table format Version: Table version of the website: here. Table version style CSS: body { width: 1020px; margin: 0 auto; background-image: url(images/bg.png); } .logo{ width:301px; … >>> More
CHAT ROOMs 7 by 6

as seen on Stack Overflow - Search for 'Stack Overflow'
I am looking for chatroom on one page with 7 loggedin users and 6+rows for say 42 users.these users will keep on adding wthnew users.Need urgent help.A PRETTY UNUSUAL Q FOR MOST OF U.What is MORE REQ new features: Usernames are unique to users currently chatting You can see a "currently chatting"… >>> More
Why can't I build Deluge?

as seen on Super User - Search for 'Super User'
Deluge is a BitTorrent Client. I am trying to build it from source, since I don't have privilege to install it as root. I am using python setup.py build. But, it failed following message, why? copying deluge/ui/web/themes/images/gray/slider/slider-v-thumb.png -> build/lib.linux-x86_64-2.4/deluge/ui/web/themes/images/gray/slider copying… >>> More
Warping Images using cvWarpPerspective Results in Some Parts of the images out of the viewable area

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am trying to stich two images together. In order to do so I extracted sift features and find matches on the two images using this C implementation. http://web.engr.oregonstate.edu/~hess/index.html After that I found the homography matrix using the matched points. http://www.ics.forth… >>> More