A gyricon platen cover provides a black background behind an original
document and a white background surrounding the document to mitigate
show-through of the back side of the document while the front side of the
document is being scanning. The gyricon platen cover also provides a black
background for the document for pre-scan detection of the location of the
edges of an original document for electronic registration, electronic skew
correction and automatic magnification selection during scanning of the
original document.
