Pen-based handwritten character recognition and storage system
First Claim
1. A device for writing and processing handwriting comprising:
- a marking element for making strokes comprising a character on a surface;
a detector for detecting each stroke on the surface; and
a processor coupled to the detector, characterizing each detected stroke as one in a set of reference strokes.
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Accused Products
Abstract
The present invention is directed to an improved system and method in which a pen-sized and shaped device detects, recognizes and stores handwriting as it is written by the device. The invention employs both an active feedback network and a character recognition methodology of partitioning detected input into character components. The active feedback network continually monitors device output to determine the sufficiency of the data input. If the data input is insufficient, the device modifies its detection methodology to obtain data the device readily recognizes. Data recognition is performed in multiple asynchronous processes. Elements of individual characters are sampled by the detector. Character elements are processed and recognized on this elemental level. Recognized character elements are stored for subsequent assembly and recognition on a character level. Thus, preferably two recognition sub-processes take place, one on a character element level and another on a character level.
68 Citations
72 Claims
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1. A device for writing and processing handwriting comprising:
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a marking element for making strokes comprising a character on a surface;
a detector for detecting each stroke on the surface; and
a processor coupled to the detector, characterizing each detected stroke as one in a set of reference strokes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61)
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9. A device for writing and processing handwriting comprising:
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a marking element for providing on a surface a representation of a character;
a detector operating according to a detection parameter having a value, the detector detecting the character on the surface;
a processor for comparing the character to a set of reference characters and determining therefrom whether the character is represented by any one of the reference characters; and
an active feedback mechanism for modifying the value of the detection parameter if the character is represented by none of the reference characters. - View Dependent Claims (10, 11)
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62. A method of detecting handwriting comprising the steps of:
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(a) illuminating strokes comprising a character marked on a surface;
(b) detecting light reflected off the surface;
(c) converting the detected light into an electronic signal;
(d) interpreting the electronic signal to identify the strokes; and
(e) identifying the strokes as the character. - View Dependent Claims (63, 64, 65)
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66. In a pen utilizing a ball for marking strokes comprising a character on a surface, a method of detecting handwriting comprising the steps of:
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(a) detecting the strokes by directly detecting rotations of the ball;
(b) converting the detected rotations into electronic signals;
(c) interpreting the electronic signals to identify the strokes; and
(d) identifying the strokes as the character. - View Dependent Claims (67, 68, 69, 70, 71, 72)
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Specification