Anti-alias font generation

Details Anti-alias font generation Anti-alias font generation

1993-12-17

1995-02-14

Herndon, Heather R.

395138, G06F 1562

Patent

active

053902890

ABSTRACT:
A method of generating a second, substantially anti-aliased, representation of a character from a first representation. The second representation is comprised of horizontal lines of dots that are shifted horizontally relative to dots of the first representation, each dot of the first representation having a value DOT1 associated therewith. The method include a step of, for each horizontal line (1-m) within the first representation of a character and for each dot (1-j) within a horizontal line, (a) determining a modifying value (DOT1k) associated with a dot(k) of the first representation, DOT1k being a function of DOT1 of the dot(k). The method includes another step of determining a value (DOT2k) of a corresponding dot for the second representation, the value of the corresponding dot being determined in accordance with the expression DOT2k=((DOT1-DOT1k )+DOT1(k-1)), where DOT1(k-1) is a modifying value of an adjacent dot on the horizontal line. The modifying value is preferably determined by a table lookup procedure within a table of previously generated values.

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IBM Technical Disclosure Bulletin vol. 31, No. 3, Aug. 1988, pp. 437-450, Armonk, N.Y., U.S. "Fast Alogorithm for Shearing a Binary Image" p.437, 1st paragraph--p. 439, 2nd paragraph, FIG. 1.

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