About InftyReader:
InftyReader is a Windows-based Optical Character Recognition (OCR)
application that recognizes and translates scientific documents
(including math symbols) into

IML: an XML file format related to InftyEditor;

LaTeX: pronounced either "Lah-tech" or "Lay-tech, LaTeX is a
macro package based on TeX. Its purpose is to simplify TeX
typesetting, especially for documents containing mathematical
formulae.

XHTML (MathML): mathematical expressions are output using
MathML notation.

HR-TeX: a simplified LaTeX-like notation designed to be easier to
“read" by individuals who are blind.
InftyReader incorporates the use of three OCR engines. The first is
InftyReader’s own OCR engine which has been designed to recognize
scientific and mathematical symbols in formulae. The second and third
OCR engines are from the Toshiba Corporation (ExpressReaderPro)
and MediaDrive Corporation (WinReader). The ExpressReaderPro and
WinReader OCR engines operate simultaneously in order to improve
the recognition results of characters appearing in ordinary text areas.
InftyReader can recognize tables including math expressions so long
as the ruled lines are not broken.
InftyReader can also process image-based PDF files.
In order for InftyReader to process an image or image-based PDF file,
the images must be:
1. black and white (binary) only;
2. high resolution (600 dots-per-inch),
3. non-antialiased (no gray-scaling); and,
4. in TIFF, GIF or PNG formats
Web-based PDF files often contain low resolution images (<300 DPI) in
order to reduce download and load times. In such cases, InftyReader
will not work.
Copyright © 2008-2011 by InftyReader Group, Inc. All rights Reserved.
Page 1 of 9
Image-Based vs. Text-Based PDF Documents
The following screenshots are of an image-based PDF and a text-based
PDF document containing the same material. Both have the same
visual appearance, but functionally they are different. This is a good
test for determining whether InftyReader will process the PDF file
correctly.
Text-based PDF Documents:
Note, in the following image when using the selection tool, you can see
that the text is capable of being selected on a character, word, line or
paragraph basis. Likewise, the icon next to the selection is a “T”
representative of “Text”. Should any of these characters be other than
standard ASCII characters, InftyReader will not process this file
accurately!
Copyright © 2008-2011 by InftyReader Group, Inc. All rights Reserved.
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Image-based PDF Documents:
Note, in the following image, that the entire area is selected and
highlighted as opposed to simply the text. Also note in the bottom of
the page is an image icon to help communicate the selection is an
image. Assuming that the images of text contained in this imagebased PDF document meet the minimum quality requirements cited
previously, InftyReader should process it fine.
What is Anti-Aliasing (gray-scaling)?
Anti-aliasing is a method of fooling the eye that a jagged edge is really
smooth. Remember though that Anti-aliasing does not actually smooth
any edges of images it merely fools the eye. Let’s take a look at the
example below to demonstrate the effects of Anti-Aliasing.
The letter on the left is a blown up letter “a” with no anti-aliasing. The
“a” on the right has had anti-aliasing applied to it. In this blown up
form it looks blurred.
Copyright © 2008-2011 by InftyReader Group, Inc. All rights Reserved.
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Now look closely at the following two letters:
You can still tell that the letter of the left is jagged but the letter on
the right looks a lot smoother and less blurry than the example above.
So as you can see, anti-aliasing brings a much more pleasing image to
the eye. Something like what comes out of a high class printer rather
than what you can be used to seeing when on a computer screen.
InftyReader can not process anti-aliased images.
Source: http://www.pantherproducts.co.uk/Articles/Graphics/anti_aliasing.shtml
Additional comparisons of non/anti-aliased images:
Copyright © 2008-2011 by InftyReader Group, Inc. All rights Reserved.
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600% Magnification of a binary, non-anti-aliased, image.
InftyReader will correctly process this image.
Copyright © 2008-2011 by InftyReader Group, Inc. All rights Reserved.
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100% Magnification of non-binary, anti-Aliased, image.
InftyReader will not correctly process this file even though
it looks like a black and white (binary) image. It’s really
not. Take a look at the following sequence of enlargements.
Copyright © 2008-2011 by InftyReader Group, Inc. All rights Reserved.
Page 6 of 9
200% Magnification of non-binary, anti-Aliased, image.
InftyReader will not correctly process this file!
Copyright © 2008-2011 by InftyReader Group, Inc. All rights Reserved.
Page 7 of 9
300% Magnification of non-binary, anti-Aliased, image
InftyReader will not correctly process this file!
Copyright © 2008-2011 by InftyReader Group, Inc. All rights Reserved.
Page 8 of 9
400% Magnification of non-binary, anti-Aliased, image
InftyReader will not correctly process this file!
Copyright © 2008-2011 by InftyReader Group, Inc. All rights Reserved.
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