The graphics I'm extracting
from the PDF are at 72dpi resolution. Is there any way I can extract
these graphics with a higher resolution?
The information contained
within a PDF is actually in the form of PostScript® --
it's the same language printers speak. When you print a document, text
and graphic information is sent to the printer in the form of mathematical
representations known as PostScript. Since there's PostScript in a PDF,
we can extract the information with a program that works with Postscript
graphics. The program we use is Adobe Illustrator® 6.0. Here's the
method we use:
Take the PDF and drag
it on top of the Illustrator program icon. Illustrator will attempt
to open the PDF however it can do so only one page at a time. In lieu
of this, a special "Open" dialog
box appears asking you to choose which page of the PDF you wish to open.
You can scroll up to the page you desire with a left and right arrow
button so remember which page your graphics are on before you open the
document.
When it opens, all the information for the graphics and
text will appear as they normally do in an Illustrator document. All
you have to do it select the area that contains the graphic you want,
group the graphic parts, copy, and paste the information into your favorite
page layout program such as PageMaker or Quark Express. Repeat this process
for each graph and each page if you have multiple pages. It may seem
time consuming, however it takes a lot less time to do this than to recreate
the entire graph. |