Stroke-based glyph-outline font generation in low/high resolution space

Claim 2

A resolution-independent character generating method for generating character images for display on an output device having a predefined level of resolution, wherein each generated character is defined by a set of stroke-based glyphs, said method comprising: selecting a character for display on the output device; retrieving prestored stroke-based glyphs that are associated with the selected character, wherein the prestored stroke-based glyphs comprise explicit and implicit data, the explicit data including key points and a width value of one or more strokes that define a glyph and the implicit data including feature points and curve values of the one or more strokes of the glyph; and generating the selected character by rendering the retrieved stroke-based glyphs of the selected character according to the predefined explicit and implicit data of the retrieved stroke-based glyphs and the level of resolution of the output device, wherein the feature points curve values, and level of resolution of the output device define curve segment intersection information for each intersecting stroke of a glyph.

Claim 3

The method of claim 1, wherein each glyph comprises information of one or more stroke.

Claim 4

The method of claim 1, wherein generating the selected character by rendering the retrieved stroke-based glyphs further comprises rendering each glyph by filling the outline of the intersecting strokes of the glyph.

Claim 5

The method of claim 3, wherein the feature points, curve values and curve segment intersection information are associated with a range of levels of resolution.

Claim 6

The method of claim 1, further comprising rendering a glyph at a display space location different from the glyph's prestored display space location according to the level of resolution of the output device, wherein the glyph's prestored display space location is defined by the key points of the glyph's strokes.

Claim 9

The method of claim 6, further comprising transmitting basic glyphs when the corresponding characters are requested.

Claim 10

A computer-readable medium encoded with a data structure for generating resolution-independent character images for display on an output device having a predefined level of resolution, wherein each generated character is defined by a set of stroke-based glyphs, said computer-readable medium for performing the steps comprising: selecting a character for display on the output device; retrieving prestored stroke-based glyphs that are associated with the selected character, wherein the prestored stroke-based glyphs comprise explicit and implicit data, the explicit data including key points and a width value of one or more strokes that define a glyph and the implicit data including feature points and curve values of the one or more strokes of the glyph; and generating the selected character by rendering the retrieved stroke-based glyphs of the selected character according to the predefined explicit and implicit data of the retrieved stroke-based glyphs and the level of resolution of the output device, wherein the feature points, curve values, and level of resolution of the output device define curve segment intersection information for each intersecting stroke of a glyph.

Claim 11

A computer-readable medium encoded with a data structure for generating resolution-independent character images for display on an output device having a predefined level of resolution, wherein each generated character is defined by a set of stroke-based glyphs, said computer-readable medium for performing the steps comprising: selecting a character for display on the output device; retrieving prestored stroke-based glyphs that are associated with the selected character, wherein the prestored stroke-based glyphs comprise explicit and implicit data, the explicit data including key points and a width value of one or more strokes that define a glyph and the implicit data including feature points and curve values of the one or more strokes of the glyph; and generating the selected character by rendering the retrieved stroke-based glyphs of the selected character according to the predefined explicit and implicit data of the retrieved stroke-based glyphs and the level of resolution of the output device, wherein the feature points, curve values, and level of resolution of the output device define curve segment intersection information for each intersecting stroke of a glyph.

Claim 12

The computer-readable medium of claim 8, wherein each glyph comprises information of one or more stroke.

Claim 13

The computer-readable medium of claim 8, wherein generating the selected character by rendering the retrieved stroke-based glyphs further comprises rendering each glyph by filling the outline of the intersecting strokes of the glyph.

Claim 14

The computer-readable medium of claim 8, wherein the feature points, curve values and curve segment intersection information are associated with a range of levels of resolution.

Claim 15

The computer-readable medium of claim 8 further comprising rendering a glyph at a display space location different from the glyph's prestored display space location according to the level of resolution of the output device, wherein the glyph's prestored display space location is defined by the key points of the glyph's strokes.

Claim 16

A graphical interface tool for defining a set of characters as a set of stroke-based glyphs, wherein each character is defined by at least one stroke identified by one or more key points and one or more width values, and feature points and curve segments associated with a range of levels of resolution, said graphical interface tool comprising: means for retrieving characters with a similar glyph from the set of characters, wherein a glyph includes at least one stroke; if the similar glyphs include intersecting strokes, means for determining the intersecting curve segments at the locations on the outlines of the intersecting strokes where the intersection between strokes occurs at various levels of resolution; means for determining the characters from the retrieved set of characters that include similar glyphs with the same determined intersecting curve segments at the various levels of resolution; means for saving the stroke information that identifies the similar glyphs and the intersecting curve segments at various levels of resolution as a basic glyph for the determined characters; and means for repeating the functions performed by the above means until all characters in the set of characters are identified by a basic glyph.

Claim 17

A graphical interface tool for defining a set of characters as a set of stroke-based glyphs, wherein each character is defined by at least one stroke identified by one or more key points and one or more width values, and feature points and curve segments associated with a range of levels of resolution, said graphical interface tool comprising: means for retrieving characters with a similar glyph from the set of characters, wherein a glyph includes at least one stroke; if the similar glyphs include intersecting strokes, means for determining the intersecting curve segments at the locations on the outlines of the intersecting strokes where the intersection between strokes occurs at various levels of resolution; means for determining the characters from the retrieved set of characters that include similar glyphs with the same determined intersecting curve segments at the various levels of resolution; means for saving the stroke information that identifies the similar glyphs and the intersecting curve segments at various levels of resolution as a basic glyph for the determined characters; and means for repeating the functions performed by the above means until all characters in the set of characters are identified by a basic glyph.