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On-line handwriting recognition using a prototype confusability dialog

  • US 5,315,667 A
  • Filed: 10/31/1991
  • Issued: 05/24/1994
  • Est. Priority Date: 10/31/1991
  • Status: Expired due to Fees
First Claim
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1. In a handwriting recognition system, the combination comprising:

  • an integrated electronic tablet on which a user may write characters with a stylus and display on which recognized characters may be displayed, said tablet including action button surfaces which when touched by the user with the stylus invoke predetermined actions relative to written characters and displayed recognized characters;

    a prototype processor for processing prototype characters written on said tablet by the user in a training session;

    a character prototype memory in which said prototype characters processed by said prototype processor are stored;

    a character matcher which compares unknown characters written by the user with prototype characters stored in said character prototype memory to determine the best match between the unknown characters and the prototype characters for producing recognized characters;

    means for displaying on said display what the user is writing on said tablet;

    means for displaying recognized characters from said character matches on said display in response to the user writing on said tablet;

    means for determining if any characters in corresponding character positions in what the user has written and is displayed on said display, and what is recognized and displayed on said display as a recognized character are different;

    means responsive to said means for determining for displaying the written character and the recognized character at the corresponding character position as an intended character indicative of the displayed written character and an unintended character indicative of the displayed recognized character, respectively;

    means for displaying at least one prototype character stored in said character prototype memory for each of the intended character and the unintended character; and

    means for removing or replacing intended and unintended character prototypes in said character prototype memory in response to the user touching predetermined ones of the action button surfaces with the stylus in response to viewing the intended character and the unintended character and their respective prototypes on the display.

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