[Blindmath] Extracting bitmap images from pdf files

[Sina Bahram]

Here's one possible trick. Save the PDF as html, then harvest the images?


Website: www.SinaBahram.com
Twitter: @SinaBahram


-----Original Message-----
From: blindmath-bounces at nfbnet.org [mailto:blindmath-bounces at nfbnet.org] On Behalf Of Richard Baldwin
Sent: Wednesday, January 25, 2012 1:08 PM
To: BlindMath Mailing List; accessibleimage at freelists.org
Subject: [Blindmath] Extracting bitmap images from pdf files

Many blind students receive electronic textbooks in pdf format.

Many textbooks contain lots of images.

Many images are poorly described in textbooks.

Various ways to convert bitmap images into tactile images are available --
some fairly good, some not so good, some very poor. However, regardless of
the quality of the conversion to tactile format, you must have the original
image file in order to get anything.

I have tried four or five different online file conversion sites in an
attempt to find a clean way that a blind student can extract the images
from a pdf textbook file without success. Different sites have different
problems, but they all seem to have some kind of problems that make it very
difficult to extract the images from pdf files.

Has anyone identified an online site or downloadable program that is
available either free or at a reasonable price to cleanly extract the
images from pdf files, which often range up to 10 or more megabytes  or
more in size?

Thanks,
Dick Baldwin

-- 
Richard G. Baldwin (Dick Baldwin)
Home of Baldwin's on-line Java Tutorials
http://www.DickBaldwin.com

Professor of Computer Information Technology
Austin Community College
(512) 223-4758
mailto:Baldwin at DickBaldwin.com
http://www.austincc.edu/baldwin/
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