Apparatus for recognizing and displaying handwritten characters and figures

• US 4,641,354 A
• Filed: 03/28/1985
• Issued: 02/03/1987
• Est. Priority Date: 03/30/1984
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Kawada, Shinichi, Yokoyama, Takanori, Shojima, Hiroshi, Koga, Kazuyoshi, Fukunaga, Yasushi, Kuzunuki, Soshiro, Hirasawa, Kotaro
• Primary Examiner(s): Moore, David K.
• Assistant Examiner(s): Todd, Jacqueline
• Application Number:
  US06/716,944
• Time in Patent Office: 677 Days
• Field of Search: 382/13, 382/18, 382/19, 382/24, 178/18, 178/19
• US Class Current: 382/189
• CPC Class Codes: G06V 30/1423 the instrument generating sequences of position coordinates corresponding to handwriting preprocessing or recognising digital ink G06V30/32
• CPC Class Codes: G06V 30/32 Digital ink

Abstract

An apparatus for recognizing and displaying handwritten characters and figures in which input stroke information on a handwritten input character or figure is read out by an electromagnetic tablet, recognition means performs character/figure recognition on the basis of the feature of the input stroke information, display means displays the input stroke information and the result of recognition, and when the result of recognition is displayed on a display screen of the display means, stroke information having been used for recognition is erased from the display screen, and stroke information which is not yet used for recognition, is left on the display screen.

Claims

1. An apparatus for recognizing and displaying handwritten characters and figures comprising input means for reading input stroke information as to a character and a figure each inputted by handwriting, recognition means for carrying out character/figure recognition on the basis of features of the input stroke information, display means including a display screen for displaying the input stroke information and the result of recognition, and processor means responsive to information received from said recognition means for controlling said display means so that said input stroke information is initially displayed on said display screen, and thereafter the result of recognition of the input stroke information as indicated by said recognition means is displayed and the input stroke information which has been used for that recognition is erased from said display screen, while input stroke information which has not contributed to said recognition is retained on said display screen.

2. An apparatus for recognizing and displaying handwritten characters and figures according to claim 1, wherein said processor means controls said display means to display the result of recognition after the input stroke information which has been used for the recognition is erased from said display screen.

3. An apparatus for recognizing and displaying handwritten characters and figures according to claim 1, wherein said recognition means sends information corresponding to the input stroke information which has been used for recognition to said processor means when the result of recognition is sent from said recognition means to said processor means, and said processor means is responsive to said information corresponding to the stroke information for identifying that part of the input stroke information which is to be erased from said display screen.

4. An apparatus for recognizing and displaying handwritten characters and figures according to claim 3, wherein said information corresponding to stroke information sent from said recognition means to said processor means includes a count of the number of strokes used for the recognition.

5. An apparatus for recognizing and displaying handwritten characters and figures according to claim 3, wherein said information corresponding to stroke information sent from said recognition means to said processor means includes a count of the number of position coordinates included in strokes used for the recognition.

6. An apparatus for recognizing and displaying handwritten characters and figures according to claim 1, wherein the input stroke information is displayed on said display means in the order read by said input means, and each time the result of recognition is sent from said recognition means to said processor means, that part of said input stroke information displayed by said display means which corresponds to said result of recognition is erased.

7. An apparatus for recognizing and displaying handwritten characters and figures according to claim 3, wherein said information corresponding to stroke information sent from said recognition means to said processor means includes a count of the number of strokes having been used for recognition and the number of position coordinates included in said strokes.

8. An apparatus for recognizing and displaying handwritten characters and figures according to claim 1, wherein said input means and said display means are disposed in overlapping relationship to each other to form a united body, and processing means controls said display means to display the input stroke information at the same place as inputted by handwriting.

9. An apparatus for recognizing and displaying handwritten characters and figures according to claim 1, wherein said recognition means carries out character/figure recognition each time stroke information is inputted and wherein each time character/figure recognition is completed, the input stroke information which has been used for recognition is erased from said display screen, and then the result of recognition is displayed on said display screen.

10. A display method in an apparatus for recognizing and displaying handwritten characters and figures, said apparatus including input means for reading input stroke information as to a character and a figure each inputted by handwriting, recognition means for carrying out character/figure recognition on the basis of the feature of the input stroke information, and display means having a display screen for displaying the input stroke information and the result of recognition, said display method comprising the steps of:

performing recognition processing in said recognition means each time said recognition means receives input stroke information from said input means so as to recognize a character or a figure;

displaying on the display screen of said display means the input stroke information received by said recognition means;

storing information as to the number of strokes

which have been used for the recognition processing; and

erasing only the stroke information which has been used in said recognition processing to achieve recognition of a character or figure from the display screen of said display means on the basis of said stored information when said recognition means has recognized a character or figure, and displaying the character or figure which is the result of recognition as well as stroke information which is being used for the next recognition processing on said display screen.

11. A display method according to claim 10, wherein said step of storing information includes storing the number of position coordinates included in said strokes.

12. A display method according to claim 10, wherein said step of storing information as to the number of strokes which have been used for the recognition processing is effected by storing the number of position coordinates included in said strokes.