[Blindmath] Extracting bitmap images from pdf files

[Tami Kinney]

Ben,

Thanks for this! I am so totally trying to round up money for that 
package... I am glad to hear it works well for you, and how!

Now I will know who I'm gonna call... /grin/

Enjoy!

Tami

On 01/25/2012 11:33 AM, Ben Humphreys wrote:
> Wow - Now I finally understand how the touchpad and embosser work
> together to enable greater functionality.
>
> It's a Eureka moment!
>
> Ben
>
> At 01:33 PM 1/25/2012, you wrote:
>> Dick, if someone is fortunate enough to have a ViewPlus embosser and IVEO
>> Creator Pro, she can have pretty good access to images.
>> * import the PDF into IVEO Creator Pro.
>> * Check the PDF to find which pages have images of interest and emboss
>> those
>> pages.
>> * Put the embossed page on the touchpad and "Zoom Rectangle" by
>> clicking on
>> diagonally-opposite corners of the image of interest. This will zoom that
>> image to occupy maximum size the page will permit.
>> * Emboss the zoomed image and read it using the touchpad. Horizontal text
>> on the image should read when pressed. The OCR in Creator Pro works
>> really
>> well with PDF's so if the resolution is at all decent, the text
>> usually is
>> OCRed well.
>> * Go back to the original image and do same for any other image on that
>> page. Repeat for images on other pages.
>>
>> Note that a sighted person can skip the first embossing step and just
>> zoom
>> those images. Handy to have sighted people around, but if there aren't it
>> just takes a little longer. By the way, that sighted person can create
>> overlays on important objects on the graphic and label them to improve
>> accessibility even more.
>>
>> John
>>
>> -----Original Message-----
>> From: blindmath-bounces at nfbnet.org
>> [mailto:blindmath-bounces at nfbnet.org] On
>> Behalf Of Richard Baldwin
>> Sent: Wednesday, January 25, 2012 10:08 AM
>> 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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>> du
>>
>>
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>
>
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