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Have a 8.5"x11" PDF and need to upscale to 4'x5'

Jun 8, 2011, 22:32 (This post was last modified: Jun 12, 2011 19:24 by idrove.)
Post: #1
Have a 8.5"x11" PDF and need to upscale to 4'x5'
As the title says I have a PDF made in open office (actually 4) that have text. I removed the photos on the bottom and the logo at the top as I need to scale these pdf's up to 4'x5' (48"x60") and add my High Resolution images back to the PDFS to send them to our banner printing company. They are requesting the files in 300dpi.

When I have tried to upscale the PDF's to that size the file has been huge and not sure if I am doing it correctly. Could someone please explain how to upscale these properly to 300dpi?

Thank you,
Newb

**Attached is one of the PDF's for example. A image will be added below the text and logo above.


Attached File(s)
.pdf  LR2 (08+) - NO IMAGES.pdf (Size: 27.27 KB / Downloads: 99)
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Jun 8, 2011, 23:35 (This post was last modified: Jun 8, 2011 23:38 by ofnuts.)
Post: #2
RE: Have a 8.5"x11" PDF and need to upscale to 4'x5'
Of course you can load the PDF in GIMP, which will politely ask you for a size. But 48"x60" at 300DPI is 14400x18000 pixels, or 260Mpixels. Your first layer in already over one GB (4 bytes/pixel...) and this will increase fast. Assuming Gimp can handle this, it is going to be extremely slow. And the final result will be a gigantic image file (TIFF, JPG...)(but not a PDF) that is going to be extremely difficult to handle.

In fact you are doing it the wrong way... A PDF is size-neutral (it's mostly vector-based), and can be scaled at will without losing sharpness. Either you can edit the PDF and graft a better image in it (there must be utilities for that)(maybe Inkscape) or you go back to the source in Open Office and make it work with a big output page (I could define a 48"x60" page in OO). If you haven't got the OO original source, you can still copy/paste the text from a PDF reader.

Now answering your questions on
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Jun 12, 2011, 19:27
Post: #3
RE: Have a 8.5"x11" PDF and need to upscale to 4'x5'
Thank you for the reply...I went back to the source Open Office file and made it bigger.
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