Interactive spatial chirography device

Abstract

Disclosed herein is chirography system including a chirography stylus fitted with an ultrasonic transducer tip and a font frame reader employing sensors at reference points of a font coordinate system. The system may be provided with a symbol recognition module adapted to identify symbol path traces of the stylus as the stylus traces the path guided by a cue card for a handwritten symbol. The system may also include an output for affirming successful recognition of a spatial chirography symbol by audibly expressing the identified symbol when the recognition succeeds and / or audibly prompting for another attempt when the recognition procedure fails. The system may employ one of physical and electronic cue cards including symbols adapted to be traced during a learning session.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] The present application makes reference to, claims priority to and the benefit from the following U.S. Provisional Patent Applications: Ser. No. 60 / 542,309, filed Feb. 6, 2004, and Ser. No. 60 / 520,169, filed on Nov. 14, 2003, the complete subject matter of which are hereby incorporated herein by reference, in their respective entireties. [0002] The present application is a continuation-in-part of U.S. Non-Provisional Patent Application having Ser. No. 10 / 672,647, entitled “A Spatial; Chirographic Sign Reader”, and filed on Sep. 26, 2003, which is hereby incorporated herein by reference, in its entirety. [0003] The present application is also a continuation-in-part of U.S. Non-Provisional Patent Application having Ser. No. 10 / 840,905, entitled “A Spatial; Chirographic Sign Reader and System for Chirographic Reading”, and filed on May 7, 2004, which is hereby incorporated herein by reference, in its entirety. [0004] The present applicatio...

AI Technical Summary

Benefits of technology

[0060] In an embodiment according to the present invention, the housing may comprise a structure comprising outer surfaces adapted to minimize risk of injury.

[0065] In an embodiment according to the present invention, the method may further comprise selecting a set of cue cards to be used in the educational session, stowing selected cue cards into a first silo, placing the selected cue cards face up in a receptacle adapted to hold the cue cards in use, ensuring that a top of a symbol displayed upon a cue card is oriented toward a sightline of a learner, administering the education to the learner by powering the device, and facilitating a learner familiarization with the education device.

[0095] In an embodiment according to the present invention, the method may further comprise invoking a sample scheduler, invoking a position sampling routine, queuing acquired samples for processing, invoking averaging routines to improve accuracy, invoking recognition routines to identify handwritten text, invoking lesson assistant routines, and invoking emulation routines.

[0101] In an embodiment according to the present invention, setting the minimum spatial separation between objects to be a tactile distance at which the learner viewer is enabled to operate at the prevailing perspective may comprise scaling a distance for the perspective to a tactile movement distance of a chirographic stylus for the learner viewer, adding to the minimum separation distance a linear factor of a statistical standard error of a position when the position is an averaged value, canceling significant amplitude of tremor oscillation detected in the learner viewer positioning, and subtracting from the minimum separation distance a canceled oscillation amplitude.

[0111] In an embodiment according to the present invention, restoring the prior context may comprise providing one of a gradual spatial, graphic, and audible transition to the prior context to prevent disorienting the learner viewer.

Problems solved by technology

Many similar X-Y trace recognition efforts have resulted in numerically intense algorithms, which tend to restrict the recognition process to off-line batch processing, conducted as a separate procedure long after the writing has been done.

Field experience has shown that recognition error rates are high enough to cause manufacturers to begin supplanting the system with keypads and software keyboards.

Miniaturized keypads are slow when compared to normal handwriting speed.

Full-sized keyboards, although faster in use than miniature keyboards, are too cumbersome for optimum purposes.

Such a configuration may suffice for directional control over a planar range, but is inadequate for the capture of natural handwriting strokes because the latter requires a depth sensor.

Further limitations and disadvantages of conventional and traditional approaches will become apparent to one of skill in the art through comparison of such systems with embodiments presented in the remainder of the present application with reference to the drawings.

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