Binary Vision refers to images or movies with no color and no continuous tone.
Important aspects of human vision are known to be binary.  Binary images are
also called "undithered", "bilevel", simple "bitmap", or the "raw primal sketch".

Binary images have long been popular in text, pattern recognition, and machine vision.
Another important example: The entire online U.S. Patent collection is in binary form.

Recent technology now allows binary images, for the first time, to also do a first 
rate job with natural images, including images of the human face in demanding 
applications such as biometric face recognition.

Today software for producing binary images from color or grayscale images comprises
hundreds of millions of complex, patented, computer instructions.  The software image
conversion to binary is completed in near realtime on modern microprocessors.

Binary images can be printed and displayed on many devices that can't process color
or grayscale images.  Binary images are easier, faster, and less expensive to copy,
fax, and transmit.  Also, in the U.S. an estimated 2,000,000 people deal with Low
Vision.  Often a binary image can be recognized by a person with Low Vision, while
color or grayscale cannot.