Handwritting input apparatus for handwritting recognition using more than one sensing technique
First Claim
Patent Images
1. Handwriting recognition apparatus comprising:
- handwriting input apparatus employing at least two different sensing techniques to sense handwriting and including at least one accelerometer located in a hand held writing implement other than at a tip thereof; and
symbol identification apparatus receiving an output of the handwriting input apparatus for providing an output indication of symbols represented by the handwriting, and wherein said symbol identification apparatus includes a first identification channel for employing an input from said handwriting input apparatus to provide a first output representing identification of symbols, a second identification channel for employing an input from said at least one accelerometer to provide a second output representing identification of symbols, and symbol selection apparatus for selecting between the first and the second outputs based on predetermined criteria.
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Abstract
Handwriting recognition apparatus including handwriting input apparatus employing at least two different sensing techniques to sense handwriting and symbol identification apparatus receiving an output of the handwriting input apparatus for providing an output indication of symbols represented by the handwriting.
225 Citations
54 Claims
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1. Handwriting recognition apparatus comprising:
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handwriting input apparatus employing at least two different sensing techniques to sense handwriting and including at least one accelerometer located in a hand held writing implement other than at a tip thereof; and symbol identification apparatus receiving an output of the handwriting input apparatus for providing an output indication of symbols represented by the handwriting, and wherein said symbol identification apparatus includes a first identification channel for employing an input from said handwriting input apparatus to provide a first output representing identification of symbols, a second identification channel for employing an input from said at least one accelerometer to provide a second output representing identification of symbols, and symbol selection apparatus for selecting between the first and the second outputs based on predetermined criteria. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Apparatus for detecting pen-surface contact comprising:
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at least one accelerometer located in a pen other than at a tip thereof measuring at least one component of acceleration of a user'"'"'s hand manipulating the pen; and a pen-surface contact detector receiving an input from the accelerometer which is filtered to remove components other than noise. - View Dependent Claims (8, 9)
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10. A handwriting recognition method comprising:
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receiving information regarding the acceleration of a writing implement from three mutually orthogonal accelerometers mounted on the writing implement other than at a tip thereof; and identifying symbols written by the writing implement at least partly on the basis of a comparison between the acceleration of the writing implement and stored acceleration sequences characterizing each of a plurality of symbols, and wherein said step of identifying symbols employs input from a digitizer to provide a first output representing identification of symbols along a first identification channel and employs input from said accelerometers to provide a second output representing identification of symbols along a second identification channel and selects between the first and the second outputs based on predetermined criteria.
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11. Handwriting recognition apparatus comprising:
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a characteristic acceleration sequence memory operative to store acceleration sequences characterizing each of a plurality of symbols; a writing implement monitor operative to receive information regarding acceleration of a writing implement from three mutually orthogonal accelerometers mounted on said writing implement other than at a tip thereof; and a symbol identifier operative to provide an output indication of symbols written by the writing implement at least partly on the basis of a comparison between the acceleration of the writing implement and the stored acceleration sequences, wherein said symbol identifier includes a first identification channel for employing input from a digitizer to provide a first output representing identification of symbols, a second identification channel for employing input from said accelerometers to provide a second output representing identification of symbols, and symbol selection apparatus for selecting between the first and the second outputs based on predetermined criteria. - View Dependent Claims (12)
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13. Handwriting recognition method comprising:
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employing at least one accelerometer located in a hand held writing implement other than at a tip thereof and at least one additional different sensing technique to sense handwriting; and receiving an output indication of the handwriting and providing an output indication of symbols represented by the handwriting, and wherein said step of providing an output indication of symbols employs input from a digitizer to provide a first output representing identification of symbols along a first identification channel and employs input from said at least one accelerometer to provide a second output representing identification of symbols along a second identification channel and selects between the first and the second outputs based on predetermined criteria. - View Dependent Claims (14, 15, 16)
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17. A method for detecting pen-surface contact comprising:
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employing at least one accelerometer located in a pen other than at a tip thereof for measuring at least one component of acceleration of a user'"'"'s hand manipulating a pen; and receiving an input from the accelerometer which is filtered to remove components other than noise.
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18. Handwriting recognition apparatus comprising:
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handwriting input apparatus including; at least first and second different handwriting sensors producing first and second handwriting outputs, at least one of said first and second different handwriting sensors comprising at least one accelerometer located in a hand held writing implement other than at a tip thereof; and an associator for combining the first and second handwriting outputs to provide an enhanced performance handwriting output; and symbol identification apparatus receiving said enhanced performance handwriting output for providing an output indication of symbols represented by the handwriting, and wherein said symbol identification apparatus includes a first identification channel employing said first handwriting output to provide a first identification output, a second identification channel employing said second handwriting output to provide a second symbol identification output, and symbol selection apparatus for selecting between the first and the second symbol identification outputs based on predetermined criteria. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A handwriting recognition method comprising:
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employing at least one accelerometer located in a hand held writing implement other than at a tip thereof and at least one additional different sensor to produce first and second handwriting outputs; combining the first and second handwriting outputs to provide an enhanced performance handwriting output; and employing said enhanced performance handwriting output for providing an output indication of symbols represented by the handwriting, and wherein said steps of combining and employing employ said first handwriting output to provide a first output representing identification of symbols along a first identification channel and employ said second handwriting output to provide a second output representing identification of symbols along a second identification channel and select between the first and the second outputs based on predetermined criteria. - View Dependent Claims (26, 27, 28)
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29. Hand imaging recognition apparatus comprising:
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hand imaging input apparatus employing at least two different sensing techniques to sense hand imaging and including at least one accelerometer located in a hand held writing implement other than at a tip thereof; and shape identification apparatus receiving an output of the hand imaging input apparatus for providing an output indication of shapes represented by the hand imaging, wherein said shape identification apparatus includes a first identification channel for employing an input produced using a first one of said at least two different sensing techniques to provide a first output representing identification of shapes, a second identification channel for employing an input produced using a second one of said at least two different sensing techniques to provide a second output representing identification of shapes, and shape selection apparatus for selecting between the first and the second outputs based on predetermined criteria. - View Dependent Claims (30, 31, 32, 33, 34)
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35. A hand imaging recognition method comprising:
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receiving information regarding the acceleration of a writing implement from three mutually orthogonal accelerometers mounted on said writing implement other than at a tip thereof; and identifying shapes written by the writing implement at least partly on the basis of a comparison between the acceleration of the writing implement and stored acceleration sequences characterizing each of a plurality of shapes, and wherein said step of identifying shapes employs input from a digitizer to provide a first output representing identification of shapes along a first identification channel and employs input from said accelerometers to provide a second output representing identification of shapes along a second identification channel and selects between the first and the second outputs based on predetermined criteria. - View Dependent Claims (36, 37)
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38. Hand imaging recognition apparatus comprising:
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a characteristic acceleration sequence memory operative to store acceleration sequences characterizing each of a plurality of shapes; a writing implement monitor operative to receive information regarding acceleration of a writing implement from three mutually orthogonal accelerometers mounted on said writing implement other than at a tip thereof; and a shape identifier operative to provide an output indication of shapes written by the writing implement at least partly on the basis of a comparison between the acceleration of the writing implement and the stored acceleration sequences, wherein said shape identifier includes a first identification channel for employing an input produced using a first sensing technique to provide a first output representing identification of shapes, a second identification channel for employing an input produced using a second sensing technique to provide a second output representing identification of shapes, and shape selection apparatus for selecting between the first and the second outputs based on predetermined criteria. - View Dependent Claims (39)
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40. A hand imaging recognition method comprising:
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employing at least one accelerometer located in a hand held writing implement other than at a tip thereof and at least one additional different sensing technique to sense hand imaging; and receiving an output of the hand imaging and providing an output indication of shapes represented by the hand imaging, and wherein said step of providing an output indication of shapes employs input from a digitizer to provide a first output representing identification of shapes along a first identification channel and employs input from said at least one accelerometer to provide a second output representing identification of shapes along a second identification channel and selects between the first and the second outputs based on predetermined criteria. - View Dependent Claims (41, 42, 43)
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44. A hand imaging recognition method comprising:
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employing at least one accelerometer located in a hand held writing implement other than at a tip thereof and at least one additional different sensing technique to sense hand imaging; and receiving an output of the hand imaging and providing an output indication of shapes represented by the hand imaging and wherein said receiving and providing comprises extracting noise out of the acceleration data and employing the noise for detecting pen-surface contact.
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45. Hand imaging recognition apparatus comprising:
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hand imaging input apparatus including; at least first and second different hand imaging sensors producing first and second hand imaging outputs, at least one of said first and second different hand imaging sensors comprising at least one accelerometer located in a hand held writing implement other than at a tip thereof; and an associator for combining the first and second hand imaging outputs to provide an enhanced performance hand imaging output; and shape identification apparatus receiving said enhanced performance hand imaging output for providing an output indication of shapes represented by the hand imaging, wherein said shade identification apparatus includes a first identification channel employing said first hand imaging output to provide a first shape identification output, a second identification channel employing said second hand imaging output to provide a second shape identification output, and shape selection apparatus for selecting between the first and the second shape identification outputs based on predetermined criteria. - View Dependent Claims (46, 47, 48, 49, 50)
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51. A hand imaging recognition method comprising:
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employing at least one accelerometer located in a hand held imaging implement other than at a tip thereof and at least one additional different sensor to produce first and second hand imaging outputs; combining the first and second hand imaging outputs to provide an enhanced performance hand imaging output; and employing said enhanced performance hand imaging output and providing an output indication of shapes represented by the hand imaging, and wherein said steps of combining and employing employ said first hand imaging output to provide a first output representing identification of shades along a first identification channel and employ said second hand imaging output to provide a second output representing identification of shapes along a second identification channel and select between the first and the second outputs based on predetermined criteria. - View Dependent Claims (52, 53, 54)
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Specification