• An image or file comprised of pixel or dot values of either black or white.
  • Bi-tonal (black and white only, one bit per pixel). A Bi-tonal image is created by a thresholding process from a grayscale input, either during the scanning process or subsequently. Thresholding is an irreversible process which results in speckled images with noticeably “stair-stepped” diagonal lines.


  1. RSI, Glossary.
  2. Formerly American Document Management, Glossary of Terms, now 5i Solutions Glossary.
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