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Print quality improves as resolution is increased, but high resolutions substantially increase communications or processing complexities.
English (United States)
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Low Resolution Print Quality Enhancement
Print quality improves as resolution is increased, but high resolutions
substantially increase communications or processing complexities.
A compromise is to scan, transmit or process print data at a low resolution
and then print the data with a higher resolution printer, placing multiple dots to
represent a single dot at the lower resolution.
Illustrated in Fig. 1 is a print enhancement scheme utilizing printing at twice
the resolution of the low resolution scanned or transmitted data. Specifically,
where diagonally located resolution bits indicate that printing of a diagonal line is
to occur, high resolution bits are inserted in the corners of the adjacent low
resolution bit areas to enhance the appearance of the resultant diagonal line. An
example is shown in Fig. 3 resulting from the enhancement of the data in Fig. 2.
Many other schemes similar to this one can be implemented to enhance images
other than typewritten characters and/or characters printed with different type
The circuitry for accomplishing the above print enhancement is similar to that
shown in U. S. Patent 3,573,789.
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