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<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"/>  <style>  </style> </head> <body lang=EN-US link=blue vlink=purple> <div class=Section1> My background in physics, optics and image processing has always used the term monochrome to mean “an image is presented as different shades of gray from black to white”; with the more general definition to be “an image is presented as different shades of a single color from the color to white”.  After searching the web (do a Google search using the key words “define: monochrome”) you will discover that you can find just about any definition you want; including:<o:p></o:p> <o:p> </o:p>           Monochrome Printer - A monochrome printer can only produce an image consisting of one color,<o:p></o:p>             usually black. A monochrome printer may also be able to produce graduations <o:p></o:p> of tone of that color, such as a grey-scale.<o:p></o:p> <o:p> </o:p> So this mean monochrome is both B/W and grey (gray)!!!!!!!!!!!!!!<o:p></o:p> <o:p> </o:p> I believe you will find that the term monochrome migrated to it current association as a binary B/W representation from how people have talked about photos.   Photos have always been denoted as either being “Black/White” or “Color”.  This is done to distinguish two big classes of photos.  However, the B/W photos (images) are actually gray tone (black monochrome) not binary B/W. <o:p></o:p> <o:p> </o:p> People also to refer to monochrome displays; but these are not binary B/W either, since the display can display a range of gray (green, red, brown) values but adjusting the intensity of the electron beam.<o:p></o:p> <o:p> </o:p> <o:p> </o:p> I would like to propose the following.<o:p></o:p> <o:p> </o:p> Binary Image – An image composed of individual pixels having only two possible states and represented by a single binary value.  Example: Black and White, Red and White, Blue and White, Blue and Red.<o:p></o:p> <o:p> </o:p> Monochrome Image – An image composed of individual pixels having n number of possible states that corresponds to a graduation of tone of a single color and represented by 1 or more bytes per pixel.  Examples: 8-Bit-Gray-Tone (256 states going from black to white) and 16-Bit-Sepia (65536 states going from brown to white)<o:p></o:p> <o:p> </o:p> Color Image – An image composed of individual pixels having n number of possible states representing <st1:City w:st="on">Hue</st1:City>, Value and Intensity where the <st1:City w:st="on"><st1:place w:st="on">Hue</st1:place></st1:City>, Value and Intensity are represented as either indexed individual color values or color space coordinates.  Examples: 8-Bit-RGB (256 possible indexed states), 24-Bit-RGB ((8,8,8) = 16 million possible states), 48-Bit-RGB ((16,16,16) = 2.8 E14 possible states), CMYK, HSV<o:p></o:p> <o:p> </o:p> Glen<o:p></o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> </div> </body> </html>