Patent
1995-05-24
1996-11-19
Jankus, Almis R.
395170, G06T 500
Patent
active
055771777
ABSTRACT:
A computerized apparatus and methods for character shape recording develops new font descriptions from shapes received from pre-defined descriptions. It does so by modeling each such shape to find features, such as points on its outlines, which are a function of that shape itself, rather than the manner in which the pre-defined description defined that shape. The system bases the segmentation of the new font description on such description-independent points. It finds new line or curve segments to approximate the pre-defined font description between such description-independent points, and it picks the outline order, starting points, and directions of that description according to standard rules. This causes the new font descriptions to be free of non-shape-required aspects of the pre-defined descriptions. It is also preferred that the system find how finely the curve must be subdivided on playback so it can be accurately portrayed with vectors by recursively subdividing the curve into subdivisions, approximating each subdivision by a vector, and recursing on the worst fitted subdivision until the worst fit is acceptable. Preferably the system matches outline shapes for different characters of the same or different fonts, and saves storage space by recording a single description of any shape used in more than one new font description. It is also preferred that the system generate new font descriptions from non-character shapes, such as logos. The invention can be used to create portable documents, by receiving fonted input text, accessing and interpreting the pre-defined font descriptions associated with each character-font shape in the input text, and generating a new font description for that shape. Such a system creates a portable document which includes the sequence of characters in the input text, the new font descriptions for those characters; and an indication of which of new font description represents the shape of each such character.
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