Chinese/Kanji on-line recognition system
First Claim
1. An on-line Chinese symbol recognition system with an extendable vocabulary comprising:
- an on-line tablet device that collects pen position signals as the Chinese symbol is written,signal filter and segment integration means for receiving pen coordinate signals and pen up/down signals from said tablet device to define segments of strokes which correspond to continuous motion of a pen on a tablet in a fixed direction,base stroke classifying means, connected to the output of said signal filter and segment integration means, to classify the motion of the pen between pen down and pen up occurrences into one of a predetermined number of base stroke categories, including means for determining if the stroke has crossed a prior stroke,symbol element recognition means, connected to the output of said base stroke classification unit, for analyzing the base stroke and crossing information to detect the occurrence of members of a predefined set of symbol elements, each of said symbol elements being graphically descriptive of portions of the shapes of Chinese symbols,a symbol recognition output table, connected to the output of said symbol element recognition means, which contains a list of all the Chinese symbols in the system'"'"'s vocabulary, each symbol in the list having associated with it all of the symbol element sequences that correspond to it, andrecognition table readout means which accepts the sequence of symbol elements for a given input symbol, searches the recognition output table to determine the identity of the symbol that is associated with that sequence of symbol elements, and sends the symbol identity code to the desired output device.
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Abstract
A Chinese/Kanji on-line recognition system consisting of four main sections, these being tablet electronics, a signal filter and segment integration unit, a base stroke classification unit and a symbol element recognition unit, and a symbol recognition output table. The tablet electronics provides pen coordinate signals and pen up/down signals which are applied to the signal filter and segment integration unit to define segments of strokes which correspond to continuous motion of a pen on a tablet in a fixed direction. The base stroke classification unit classifies the motion of the pen between pen down and pen up occurrences into one of 42 categories and also indicates if the stroke has crossed a prior stroke. This is then analyzed by the symbol element recognition unit which interprets the base strokes that have been recorded for the word and generates a sequence of symbol elements, referred to as "alphabet" components, that occur in this symbol. The sequence of symbol elements are interpreted in the symbol recognition output table which provides a form of a simple table look-up to determine the word that had been written. Only 72 basic symbol elements (alphabet) are required to synthesize all of the Chinese/Kanji vocabulary.
103 Citations
10 Claims
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1. An on-line Chinese symbol recognition system with an extendable vocabulary comprising:
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an on-line tablet device that collects pen position signals as the Chinese symbol is written, signal filter and segment integration means for receiving pen coordinate signals and pen up/down signals from said tablet device to define segments of strokes which correspond to continuous motion of a pen on a tablet in a fixed direction, base stroke classifying means, connected to the output of said signal filter and segment integration means, to classify the motion of the pen between pen down and pen up occurrences into one of a predetermined number of base stroke categories, including means for determining if the stroke has crossed a prior stroke, symbol element recognition means, connected to the output of said base stroke classification unit, for analyzing the base stroke and crossing information to detect the occurrence of members of a predefined set of symbol elements, each of said symbol elements being graphically descriptive of portions of the shapes of Chinese symbols, a symbol recognition output table, connected to the output of said symbol element recognition means, which contains a list of all the Chinese symbols in the system'"'"'s vocabulary, each symbol in the list having associated with it all of the symbol element sequences that correspond to it, and recognition table readout means which accepts the sequence of symbol elements for a given input symbol, searches the recognition output table to determine the identity of the symbol that is associated with that sequence of symbol elements, and sends the symbol identity code to the desired output device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification