JPS61272890A - Device for recognizing handwritten character - Google Patents

Abstract

PURPOSE:To correct easily some part of a handwritten character during inputting by employing an identifying means discriminating stroke data inputted through a tablet to be character data or erasure data. CONSTITUTION:When the titled device is in a normal input mode, the stroke (character) data inputted through the tablet 4 is accumulated in a character buffer 7, for instance. When an error is found in the middle of inputting and the device is made in an erasure mode, the inputted stroke (erasure) data is accumulated in an erasure buffer 8, for instance, so that the part concerned is enclosed through the tablet 4. Thus the relative coincidence between the part of the character to be corrected and that to be specified as erasure can be obtained. Then the mode is shifted to an erasure termination 43, whereby the character part to be corrected is erased by the part to be specified as erasure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a handwritten character recognition device, and more particularly to a handwritten character recognition device that facilitates correction of handwritten input.

[Summary of Disclosure] This specification and drawings describe a handwritten character recognition device that particularly facilitates correction of handwritten input, and describes an input means for inputting handwriting data and handwriting data input by the input means. Discloses a technology for a handwritten character recognition device that includes an identification means for distinguishing between character data and data instructing erasure, and erasing character data input by the input means with data input by the input means instructing erasure. It is something to do.

[Prior Art] An online handwritten character recognition device that recognizes handwritten characters inputted from an input device such as a tablet has an undo or rewrite function when it is desired to correct an error while inputting each character. 0, for example, "omitted", is entered again after erasing the characters in the middle of inputting.
If the ``each'' part of the character was written as ``bun'', it was necessary to re-enter it from the beginning, including the ``田'' part. Therefore, it is desired to develop a device that allows correction in the minimum necessary area and allows smooth character input.

[Problems to be Solved by the Invention] This invention attempts to solve the disadvantage of conventionally deleting an entire character by specifying an undo or rewrite function when it is desired to correct an error during input.

As a means for solving this problem, for example, the online handwritten character recognition device of the embodiment shown in FIG.

A tablet 4 for inputting y-coordinate data) and an identification means for distinguishing whether handwriting data input by the tablet 4 is character data or erased data (operations for erasing designation 42 and erasing end 43) Contains a flag E) that inverts the erase/input mode based on.

In the configuration shown in FIG. 1, when the device is in the normal input mode, the handwriting (characters) input by the tablet 4
Data is stored in a character buffer 7, for example. Further, when an error is discovered during input and the device is set to the erase mode, the handwriting (erasure) data input by the tablet 4 so as to surround the part concerned is stored in the erase buffer 8, for example. By doing this, you can find a relative match between the character part you want to correct and the character part you want to specify for erasure, and then finish erasing 4.
3, the character portion to be corrected is erased by the portion designated for erasure.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of the online handwritten character recognition device according to the embodiment. In FIG. ROM in which a correction processing program is stored; 3;
includes a flag E for identifying input/erase mode;
A RAM provides a work area for executing the program shown in FIG. 2, 4 is a tablet for outputting handwriting data (x, y data), and 5 is an input pen for inputting handwriting.

6 is a tablet control unit (TC) that controls the tablet 4 and the input pen 5; 7 is a character buffer that stores white character data of handwriting data; 8 is an erase buffer that stores erased data of the handwriting data; 9 is a handwritten character and handwriting. 10 is a controller (CRTC) for the CRT display device 9, and tt is a common bus for the CPUI.

Further, in the tablet 4, 4o is an input area for drawing handwriting, 41 is an operation area that notifies the CPU of the end of one character input and starts one character recognition process,
42 is an operation area for erasing designation, which informs the CPU of the intention to designate an erase area; 43 is an operation area for completing erasure designation, in which erasure is executed according to the designation of the operation area, and after the erasure is completed; , characters can be entered again. These areas 41, 42, and 43 are operated with the input pen 5 in the same way as the input area 4o.

FIG. 582 is a flowchart showing the partial erasure correction process of the embodiment. Here, the present invention will be described in detail by taking as an example a case where the part "each" in the character "abbreviation" is written as "sentence". In step Sl, the character buffer 7 that stores the character handwriting data to be recognized, the erase buffer 8 that stores the erase area designation data, and the flag E for character/erase mode identification are cleared, respectively. Step S2 waits for coordinate data (x, y) to be input by using the input pen 5. As a result, if the pen 5 is being used, control proceeds to steps S3 to S7, and the handwriting is stored in the character buffer 7. After the data is stored, step S again
Proceed to 2.0 Next, if the operator notices that the "each" part of the "abbreviation" character has been written as one sentence, point the erase designation operation area 42 with the pen 5,
As a result, the control moves from step S4 to step 310, flag E indicating the erase mode is set to erase mode, and the process returns to step S2 again. Even after flag E is set, the erasure range designation can be entered in handwriting in the same way as with letters. In this case, the process proceeds to step 312 via steps 52 to S6, and the erase designated area data is stored in the erase buffer 8.
For example, to change the part of ``one sentence that you accidentally entered'' to ``each'', use the pen 5 to specify an area around the ``sentence''. This designated area 81 is stored in the erase buffer 8, and the characters in the corresponding area of the character buffer 7 are erased by the next operation. That is, when it is determined in step S5 that the erasing end operation area 43 has been pressed with the pen 5, the flag E is cleared in step Sll to enter the character mode, and the erase area 81 in the character buffer 7 is moved in step S13. The handwriting data corresponding to the part surrounded by is cleared. In other words, it is the "sentence" part. Since the handwriting data in the character buffer 7 and the erasure buffer 8 are constructed based on the coordinate data (X, ?), such correspondence is easily possible. And from then on,
Returns to the input waiting state in normal character mode 0
Next, when the operator writes the character ``Each'' over the place where he wrote ``1 sentence,'' flag E has been cleared, so the control proceeds to step 33 to step S7, and the corresponding area of the 1-character buffer 7 is filled in with ``Each''. The handwriting data of each item is stored. Furthermore, “
When the operator finishes writing each character and uses the pen 5 to specify the operation area 41 where one character input is completed, the control moves from step S3 to step S8, where recognition processing is performed based on the handwriting data stored in the character buffer 7. As a result of the above-described operations, the handwriting of the character "abbreviation" is stored in the character buffer 7, so in step S9, the character code of "abbreviation" is obtained as the recognition output of the apparatus. After that, the process returns to step S1, and a new one-character input recognition process is performed.

[Effects of the Invention] As described above, according to the present invention, it is possible to easily partially correct handwritten characters that are being input.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an online handwritten character recognition apparatus according to an embodiment, and FIG. 2 is a flowchart showing partial erasure correction processing according to an embodiment. In the figure, l... central processing unit (CPU), 2...
ROM, 3...RAM, 4...Tablet, 5...
・Tablet input pen, 6...Tablet control unit (T
C), 7... Character buffer, 8... Erase buffer,
9...CRT display device, 10...CRT controller (CRTC), l l...common bus. Patent applicant Canon Co., Ltd. Figure 2

Claims (1)

[Claims] A handwritten character recognition device for recognizing handwritten characters, comprising an input means for inputting handwriting data, and an identification means for distinguishing between character data and data instructing erasure of the handwriting data inputted by the input means, A handwritten character recognition device, characterized in that only part of the character data inputted by the input means is erased using data inputted by the input means instructing erasure.