Browse Prior Art Database

Automatic Switching of Recognition Character Set

IP.com Disclosure Number: IPCOM000112088D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Kitamura, K: AUTHOR

Abstract

Disclosed is a method for automatic switching of recognition character set in online handwritten character recognition.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 65% of the total text.

Automatic Switching of Recognition Character Set

      Disclosed is a method for automatic switching of recognition
character set in online handwritten character recognition.

      Limitation of the character set is effective for recognizing
similarly shaped characters, such as "0"(numeral) and "O"(letter), or
"1"(numeral) and "/"(symbol).  It is especially useful for Japanese,
since the number of characters is very large and there are many
ambiguous cases.  The limited sets are usually called character
modes.

      In the following example, the writer will start in alphabetic
mode and will temporarily change to numeral mode for "13."

Example:  "B looks like 13 in handwriting."

The temporary mode change requires two user operations: one to switch
from X mode to Y mode, and the other from Y to X.  However, a user
sometimes forgets to do the second operation, which causes
recognition errors or rejections for subsequent input characters.

      The problem here is not that the user forgets, but that the
recognition process does not allow for the existence of no probable
candidates.

      When there are no probable candidates in the current
recognition character set, the disclosed method (1) automatically
changes the recognition character set to the previous set or another
one, (2) re-recognizes the input character, (3) compares the
probability of the resulting character with that of the initial
recognition, and (4) selects the character with higher p...