JP2001067434A - Device and method for character correction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a character correction device which is superior in practicality and has a character recognition result correcting function. SOLUTION: In this character correcting method, when a user specifies a character string displayed by on-line handwriting input or OCR(optical character reader) input and recognition with a pen (A), for correcting the character string, specific reference lines L1 to L4 showing the upper and lower limit sizes of uppercase and lowercase characters of respective characters corresponding to the specified character string are selected and displayed together with the character string (B), so that when the reference line L1 is moved to the position of the reference line L2 through pen operation, a prescribed correction rule corresponding to the position movement is retrieved from a table and applied to the character string. Consequently, the character string is corrected from a lowercase character string to an uppercase character string and displayed and the reference lines are erased ((C) and (D)).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is applied to an online handwritten character recognition device for recognizing characters input by handwriting on a substrate such as a tablet in real time and outputting a character code as a recognition result, or a document image read by a scanner. And outputs a character code as a recognition result.
For example, the present invention relates to a character correction device and method applied to a recognition type information input device such as an optical character reading device, and particularly to a character correction device and method when a character as a recognition result is incorrect.

[0002]

2. Description of the Related Art Conventionally, an online handwritten character recognition device or an optical character reading device (hereinafter referred to as an OCR) equipped with a tablet is known.
In the case where the character of the recognition result displayed by the device is incorrect, if the device is equipped with a keyboard, the user can use the cursor keys of the keyboard to input the erroneously recognized character (character string).
Move the cursor to the back key (or delete key)
Is used to delete the erroneously recognized character (character string) to be corrected, and correct it to a desired character (character string) by kana-kanji conversion or the like.

[0003] Even when there is no keyboard, in an online handwritten character recognition device or an OCR having an online handwritten character recognition function, the user can recognize erroneously recognized characters (character strings).
Is selected and deleted with a pen provided on the tablet, and the desired character (character string) is input by handwriting and corrected.

In addition, an online handwritten character recognition device and an O
In the CR, when candidate characters (character strings) are stored in advance in correspondence with the characters (character strings) of the recognition result, for example, Japanese Patent Application Laid-Open No. 63-24455 or Japanese Patent Application Laid-Open No.
As disclosed in Japanese Patent No. 324901, a candidate character (character string) corresponding to the vicinity of the correction target character (character string) in the recognition result is displayed, and a desired character (character string) is selected from the candidate characters (character string). This has been corrected.

In order to make it easier to distinguish characters having similar shapes, as proposed in Japanese Patent Application Laid-Open No. 5-40845, a candidate character and its corresponding reading and meaning are simultaneously displayed. The display has been made.
Further, as shown in Japanese Patent Publication No. 1-50954, the size of a character is determined on the basis of the size of the character before and after, as shown in Japanese Patent Publication No. 1-50954.

[0006]

However, Japanese Patent Application Laid-Open No. 63-24455 or Japanese Patent Application Laid-Open No. 5-324901
According to the method proposed in Japanese Patent Application Laid-Open Publication No. H10-210, when a correct character (character string) is selected from a candidate character group corresponding to a correction target character or a character string or a candidate character string group, the character shape is included in the candidate group. When a similar character or character string is displayed, it is necessary to find and select a difference between characters having similar shapes, which increases the burden on the user and leads to a decrease in operability.

According to the method proposed in Japanese Patent Laid-Open No. 5-40845, readings are simultaneously displayed to assist in distinguishing candidate characters having similar shapes. By doing so, the difference is clarified for the first time, so that the user needs to perform the work of selection and confirmation, which increases the burden. Furthermore, when a candidate character string is displayed, a certain size is required on the display screen to display the reading and meaning indicating the difference in the display of the candidate character, and sufficient display is possible with a small device. Is difficult.

[0008] Regarding the size of characters, when character input to an area without a frame is considered, Japanese Patent Publication No. 1-50954 makes it difficult to determine the size when only one character is input. A user's task of displaying and selecting character candidates for large and small characters is required, increasing the burden.

An object of the present invention is to provide a character correcting apparatus and a character correcting method having a function of correcting a character recognition result which is excellent in practicality.

It is another object of the present invention to provide a character correcting apparatus and a character correcting method having a character recognition result correcting function capable of reducing the burden on the user in operation.

[0011]

According to the present invention, there is provided a character correcting apparatus for storing a recognition character string based on a recognition result of character information, a display for displaying the recognition character string in the storage, and a display. A reference line display unit for displaying a plurality of different reference lines for correcting a character string corresponding to the partial character string together with a desired partial character string in the recognition character string displayed in the display unit; When the position of one or more reference lines is changed by an external operation among the plurality of reference lines, the correction rule specified based on the mode of the position change is used for the recognition character string in the storage unit. Character string correcting means for correcting a partial character string.

Since the character correcting device according to the present invention is configured as described above, a plurality of characters for character correction are provided by the reference line display means corresponding to a desired partial character string in the recognized character string displayed on the display unit. When the reference lines are displayed and the positions of these reference lines are changed by an external operation, the character string correcting means uses the correction rule specified based on the mode of the position change to recognize the recognized character string in the storage unit. Is corrected.

Therefore, if the user checks the recognition character string displayed on the display unit and finds an error in the partial character string and wants to correct it, the user changes the position of the displayed reference line by external operation. All you need to do is to identify the corrective rule to apply,
Since the character can be corrected by using it, the character of the recognition result can be easily corrected, which is excellent in practicality, and the burden on the user is reduced.

The above-described character correction device may be configured such that the correction rule is a rule for converting characters of a partial character string to uppercase / lowercase.

Since the character correcting device according to the present invention is configured as described above, the partial character string in the recognized character string which is desired to be corrected can be changed by changing the position of the reference line by an external operation. If the string is lowercase, it is modified to a substring consisting of uppercase letters; if it is uppercase, it is modified to a substring consisting of lowercase letters.

Therefore, the user can correct the partial character string erroneously recognized as uppercase in the recognition character string to lowercase only by changing the reference line position. Because it can be modified to uppercase, it is practical.

The character correction device according to the present invention may be configured such that the correction rule is a rule for converting a character of a partial character string into another character having a similar shape.

Since the character correcting apparatus according to the present invention is configured as described above, the partial character string in the recognized character string, which is desired to be corrected, is externally operated to change the position of the reference line, so that the partial character string can be shaped. Is modified using a string of other similar characters.

Therefore, the user merely performs the operation of changing the reference line position, and the partial character string erroneously recognized as another character having a similar shape in the recognition character string is replaced with the original correct character having a similar shape. Since it can be modified to a partial character string consisting of characters, it is excellent in practicality.

The character correction device according to the present invention may be configured so that the correction rule is a rule for converting a character of a partial character string into another character having the same display size on the display unit.

Since the character correcting device according to the present invention is configured as described above, the partial character string to be corrected in the recognized character string can be displayed in a display size by changing the position of the reference line by an external operation. Is modified to another substring that is the same.

Therefore, the user simply corrects the partial character string which is erroneously recognized in the recognized character string by changing the reference line position without changing the display size. It has excellent practicality.

The character correcting device according to the present invention may be configured as follows. In other words, the character string correcting means includes a correction rule table storing a plurality of character codes for specifying a plurality of characters, one or more different correction rules corresponding to each character code, and each character of the partial character string. Correction rule specifying means for specifying one correction rule according to the position change mode among the one or more correction rules searched in the correction rule table based on the character code of (i).
Each of the plurality of different correction rules includes a different position change mode and a different character code used for the correction.

Since the character correcting device according to the present invention is configured as described above, when correcting a desired partial character string of the recognized character string, the correction rule specifying means changes the position of each character code of the partial character string and the reference line. The modification rule table is searched based on the aspect and the modification rule to be applied to the modification of the partial character string is specified.

Therefore, if a variety of correction rules are prepared and registered in the correction rule table in advance, the range of selection of the correction rules according to the manner of changing the position of the reference line by an external operation is expanded, and practical use is possible. Excellent in nature.

The character correcting device according to the present invention may be configured as follows. In other words, the reference line display means displays a plurality of different reference lines at positions for respectively defining the upper / lower size of uppercase / lowercase characters.

Since the character correcting device according to the present invention is configured as described above, when correcting the desired partial character string of the recognized character string, the upper limit of upper / lower case of the character corresponding to the desired partial character string by the reference line display means. A reference line is displayed at a position for defining the / lower limit size.

Therefore, the user can intuitively perform an external operation of changing the position of the reference line for correcting uppercase →→ lowercase characters, which is excellent in practicality.

The character correction method according to the present invention is applied to an information processing apparatus including at least a storage unit for storing a recognized character string based on a recognition result of character information, and a display unit for displaying the recognized character string in the storage unit. This is the character correction method used. The character correcting method includes a reference line displaying step of displaying a plurality of different reference lines for correcting a character string corresponding to the partial character string together with a desired partial character string in the recognized character string displayed on the display unit. When the position of one or more reference lines is changed by an external operation among the plurality of reference lines displayed in the reference line display step, using a correction rule specified based on the position change mode, A character string correction step of correcting a partial character string in the recognition character string in the storage unit.

Since the character correction method according to the present invention is configured as described above, a plurality of characters for character correction are displayed in the reference line display step in accordance with a desired partial character string in the recognized character string displayed on the display unit. Are displayed, and when the positions of these reference lines are changed by an external operation, the character string correction step uses the correction rule specified based on the position change mode to use the recognition character string in the storage unit. Is corrected.

Therefore, when the user finds an error in the partial character string in the recognition character string displayed on the display unit and wants to correct the partial character string, the user only needs to change the position of the displayed reference line by an external operation. Since the correction rule to be applied can be specified and the character can be corrected by using the specified correction rule, the character correction of the recognition result can be extremely easily performed, the practicability is excellent, and the burden on the user is reduced.

According to another aspect of the present invention, a computer-readable recording medium storing a character correction program for causing a computer to execute the character correction method has the following features. That is, the character correction method is applied to an information processing apparatus that includes at least a storage unit that stores a recognized character string based on a recognition result of character information, and a display unit that displays the recognized character string in the storage unit. A reference line displaying step of displaying a plurality of different reference lines for correcting a character string corresponding to the desired partial character string together with the desired partial character string in the recognized character string displayed on the display unit; Of the multiple reference lines displayed by the step,
When a position of one or more reference lines is changed by an external operation, a character string for correcting a partial character string in the recognition character string in the storage unit using a correction rule specified based on the mode of the position change And a correcting step.

Therefore, by executing the above-mentioned handwriting correction program, a plurality of reference lines for character correction are displayed in the reference line display step corresponding to the desired partial character string in the recognized character string displayed on the display unit. When a line is displayed and the positions of these reference lines are changed by an external operation, a part of the recognition character string in the storage unit is used by using a correction rule specified based on the position change mode in the character string correction step. The string is modified.

Therefore, when the user finds an error in the partial character string in the recognition character string displayed on the display unit and wants to correct the partial character string, the user only has to change the position of the displayed reference line externally. Since the correction rule to be applied can be specified and the character can be corrected by using the specified correction rule, the character correction of the recognition result can be extremely easily performed, the practicability is excellent, and the burden on the user is reduced.

[0035]

Embodiments of the present invention will be described below. Here, the function of correcting characters according to each embodiment is individually applied, but may be applied in combination with each other.

(Embodiment 1) FIG. 1 is a block diagram of a character correcting apparatus applied to each embodiment of the present invention. In the figure, the character correction device includes a control unit 2 comprising a microcomputer for centrally controlling and monitoring the device itself. The control unit 2 includes a display integrated tablet 1, an information editing unit 3 (3A, 3B), An information input unit 4 incorporating a buffer 41, an information storage unit 5, a program memory 6, a communication I / F (abbreviation of interface) 7 for connecting to a communication network 8 including the Internet, and an external storage medium 10 are set. An external storage unit driver 9 for reading and writing information is connected thereto.

The display-integrated tablet 1 has a main surface,
A tablet unit for inputting characters and figures handwritten on the main surface using a pen and a display unit for displaying characters and figures input to the tablet unit in real time are integrally formed. The display-integrated tablet 1 detects writing information (xy coordinate values on the main surface of the tablet, ON / OFF values of the pen, and information on the ON / OFF time of the pen) obtained by handwriting input, and detects the control information. Give to.

The program memory 6 stores various programs executed in the apparatus. Communication I /
F7 is provided for the device to transmit and receive various information via the communication network 8.

The information editing unit 3 (3A, 3B) stores a reference line table 32 in which information about a reference line for each character is stored, and a rule for correcting the corresponding character when the reference line is corrected. It has a reference line correction rule table 33 (331, 332) for storing information and a buffer 31. Details of the reference line table 32 and the reference line correction rule table 33 (331, 332) will be described later.

Here, the reference line is a line indicating a predetermined size of a target character (character string), for example, the upper or lower limit of upper or lower case (size in the height direction). Is a line indicated with reference to the position of the base line which is the basis of.

Further, the reference line is not limited to a line defined as a line for indicating the size of upper / lower case. In other words, it is displayed in association with the character to be corrected, and the correction content of the target character string (whether or not correction has been made, the content of correction, etc.)
Any line may be used as long as the line can be operated externally by the user to instruct the user.

FIG. 2 is a flowchart showing a processing procedure when handwritten information is input using the display-integrated tablet 1 in the apparatus shown in FIG.

Here, a processing procedure in the case where the information input unit 4 of FIG. 1 is provided with an online handwritten character recognition function and the display integrated tablet 1 is used for inputting writing data will be described with reference to FIG. I do.

When the user operates a pen (not shown) of the display-integrated tablet 1 to write characters on the tablet main surface, the display-integrated tablet 1 obtains writing information (xy coordinate information, pen ON / OFF information, Pen ON / O
FF time information) is detected in real time and transferred to the control unit 2 (S100).

The control unit 2 stores the transferred writing information in the internal buffer 21, and determines whether or not the writing of the character is completed based on, for example, time information indicating a pen OFF period (S101). When it is determined that the writing of the character is completed based on the fact that the time period in which the pen is OFF exceeds the predetermined period, the writing information held in the internal buffer 21 is transmitted to the information input unit 4. It is transferred and notified that the character recognition is to be started.

Then, the information input section 4 stores the transferred writing information in the internal buffer 41, and performs character recognition (S102). Since a known technique is used for character recognition, details thereof are omitted. The information input unit 4 transfers the character recognition result (character code for each character, information on size (size), writing information) to the information storage unit 5, and simultaneously notifies the control unit 2 that the recognition has been completed ( S103).

When the control unit 2 confirms that the recognition has been completed, it deletes the corresponding writing information in the internal buffer 21 and
The information based on the character code of the character recognition result in the information storage unit 5 is displayed on the display device of the display integrated tablet 1 (S1).
04). Then, the recognition process ends (S105).

In general, the display position of a displayed character string has a function that can be detected by a processing unit that controls display. For example, in the configuration of FIG. 1, it is assumed that information regarding a display position of each character of a character string displayed on the display-integrated tablet 1 is held in the internal buffer 21 of the control unit 2. A series of online handwritten characters are input by repeating the above procedure.

FIGS. 3A and 3B are diagrams showing examples of input of handwritten characters in the display-integrated tablet 1 of FIG. FIG. 4 is a diagram showing a relationship between writing information and strokes obtained when inputting handwritten characters using the display-integrated tablet 1 of FIG.

As shown in FIGS. 3A and 3B, the handwritten character "Pen" is composed of strokes st1 to st4.
Writing information P ₁ to P _k-1, as shown in FIG. 4, the writing information P
_{k to} P _l-1 , writing information P _{l to} P _{m -1} and writing information P _{m to} P _n
Is obtained. Writing information P _i (i = 1,
, N) are information (on / on) indicating the ON / OFF state of the pen.
off), xy coordinate values (xi, yi), and time information ti indicating the corresponding time. 4, the pointer ID ₀ ~ID ₄ is provided for uniquely identifying each handwritten information in the buffer 21.

As shown in FIGS. 3A and 3B, the flow of recognition when the user writes "Pen" on the display-integrated tablet 1 will be described below. The condition for completion of character writing determined by the control unit 2 is the time (T) from the end of writing the last character of a series of character strings, that is,
The time (T) after entering the FF state is a fixed time (Tt)
h) It is assumed that it becomes longer.

[0052] When the user writing a "Pen" in the display-integrated type tablet 1, handwritten information P ₁ to P _n detected by the display-integrated type tablet 1 is transferred to the control unit 2 (S100). In the control unit 2 the writing information P ₁ time from the time it receives a to P _n (T) is measured, performs comparison of the time information tn of P _n, when the T-tn> Tth (Yes in S101), character it is determined that the row writing of is completed to transfer the writing information P ₁ to P _n to the information input unit 4, an instruction to start recognition.

The information input unit 4 stores the writing information P _{1 to} P _n in the internal buffer 41, and sets continuous writing information in the pen-ON state as one stroke, and sets one overlapping stroke to one stroke.
Group as one character unit. For example, from the writing information of the input character “Pen” (see FIG. 4), FIG.
(A) The circumscribed rectangles ((q (0) 1, q (0) 2), (q (1) 1, q
(1) 2), (q (2) 1, q (2) 2), (q (3)
1, q (3) 2)) are obtained. At this time, the relation between the x coordinate values of each circumscribed rectangle is qx (i) 2> qx (i + 1)
When 1 (qx (i) 1: the minimum value of the x coordinate of the i-th circumscribed rectangle, qx (i) 2: the maximum value of the i-th circumscribed rectangle), the ith circumscribed rectangle and the (i + 1) th circumscribed rectangle Are defined as overlapping, qx (0) 2> qx (1) 1, so that the strokes st1 and st2 are different from those in FIG.
As shown in (B), they are grouped as one character unit.

Then, as shown in FIG. 3B, the information input unit 4 performs recognition for three character units and obtains a recognition result for each character unit (S102). Then, the information input unit 4 stores the character string length information A as the recognition result in the information storage unit 5.
1, character code string information A2, and character candidate information A3 for each character of the character string are stored. The character candidate information A3 includes candidate character number information A31 and candidate character information A3 for each character.
2. The circumscribed rectangle coordinate information A33 and the pointer A34 in the buffer for writing information are stored (S103).

FIG. 5 shows an example of the contents of the information storage unit 5 storing the recognition results corresponding to FIG. FIG. 5 shows the input “P
The character string length information A1 = “3”, the character code string information A2 = “pen”, and candidate information of each character are successively stored. Then, when the information input unit 4 notifies the control unit 2 that the recognition is completed, the control unit 2 displays characters on the display device of the display integrated tablet 1 according to the character code string information A2 in the information storage unit 5 ( S104).

FIG. 6 is a block diagram showing an embodiment of the present invention.
It is a flowchart of character recognition by a CR function and a result display. The apparatus shown in FIG. 1 may be configured to include an OCR function in which the information input unit 4 includes an image input device such as a scanner or a digital camera. The processing procedure in that case is shown in FIG.

For example, when the user sets an original to be read on the scanner of the information input section 4 and designates a recognition button (not shown) displayed on the display-integrated tablet 1, the control section 2 instructs the recognition button. Is detected and the information input unit 4 is instructed to input an image (Yes in S300).
s) The information input unit 4 performs image input, stores the input image data in the internal buffer 41 of the information input unit 4, and notifies the control unit 2 that the image input has been completed (S30).
1).

When the control unit 2 confirms that the image input has been completed, it instructs the information input unit 4 to start recognition. Therefore, the information input unit 4 confirms the instruction to start recognition and stores the image data in the internal buffer 41. Character recognition is performed based on (S3
02), the recognition result (character code, size (size) information, and character image information corresponding to each character) is transferred to the information storage unit 5, and at the same time, the control unit 2 is notified that the recognition is completed (S303). .

When the control unit 2 confirms that the recognition has been completed, the control unit 2 reads the character code of the recognition result from the information storage unit 5, and
Display integrated tablet 1 based on the read character code
(S304), and the recognition process ends (S305).

In general, the display position of the displayed character string is assumed to be stored in the internal buffer 21 of the control unit 2 here.

FIG. 7 is a flowchart showing a procedure for correcting the character recognition result in the apparatus shown in FIG. FIG. 1 described above
A description will be given of a flow of processing for correcting a character recognized by online handwriting input or OCR input in the device of FIG.

When the user designates a character string to be corrected using a pen in a character string displayed as a recognition result on the display-integrated tablet 1, writing information indicating this instruction is detected and transferred to the control unit 2 ( S200). The control unit 2 compares the writing information transferred from the display-integrated tablet 1 with the display position of the display character string held in the internal buffer 21 and determines that the character string is selected (S201). Yes), the corresponding recognition result is read from the information storage unit 5, and transferred to the information editing unit 3 as a correction target character string (S202).

Next, since the control unit 2 instructs detection of the reference line of the correction target character string, the information editing unit 3 obtains reference line information corresponding to each character code of the correction target character string from the reference line table 32. In the internal buffer 31 (S20).
3). The information editing unit 3 transfers the obtained reference line information to the control unit 2, and the control unit 2 receives the transferred reference line information,
A reference line based on this is displayed simultaneously with the correction target character string displayed on the display device of the display-integrated tablet 1 (S204).

Next, when the user designates the displayed reference line with a pen and corrects the position of the reference line, the writing information at that time is detected and transferred to the control unit 2 (S205). When the control unit 2 receives the transferred writing information and transfers it to the information editing unit 3, the information editing unit 3 receives the transferred writing information, and stores the received information and the received information in the internal buffer 31 in advance. Then, it is determined whether or not the user has corrected the position of the reference line by comparing the existing reference line information (S206).

When it is determined that the position has been corrected, the information editing unit 3 uses the internal buffer 31 based on the determination result.
Is corrected, the correction result is transferred to the control unit 2, and the completion of the correction processing is notified (S207). In response to receiving this notification, the control unit 2 deletes the display of the reference line of the correction target character string (S209), and corrects the recognition result of the information storage unit 5 using the received correction result, The recognition result displayed on the display device 1 of the display-integrated tablet 1 is updated by using this (S210), and a series of correction processing ends (S21).
1).

On the other hand, if it is determined that the selected character string is not selected (No in S201), the correction process ends.

If the information editing unit 3 determines that the reference line has not been corrected (No in S206), the control unit 2 is notified that the reference line has not been corrected. The unit 2 deletes the reference line displayed on the display-integrated tablet 1 (S208), and ends the correction processing (S211).

Next, the procedure for correcting the correction target character string using the reference line according to the present embodiment will be described in detail.

Correction of character string to be corrected in FIG. 7 (S207)
In step S20, the information editing unit 3 determines whether the reference line should be corrected (S20
Based on the determination result of 6), of the correction target character strings held in the buffer 31 that are to be converted to upper case ← → lower case, the lower case is used if the corrected conversion character string is upper case, and the upper case is used if the corrected conversion character string is lower case. And the correction target character string resulting from the correction is transferred to the control unit 2 to notify that the correction processing has been completed.

The character to be converted from uppercase to lowercase in the character string to be corrected is determined from its character code and converted to the corresponding uppercase or lowercase character code.

Here, for example, if the character recognition result is "pe
The procedure for correcting the uppercase letter →→ lowercase letter in the case of “n” will be described in detail with reference to the drawings.

FIGS. 8A to 8F are diagrams for explaining the relationship between a character font and a reference line according to each embodiment of the present invention. FIG. 9 is a diagram showing an example of the contents of the reference line table 32 corresponding to FIGS. 8A to 8F. 8 (A) to 8 (F)
In each of uppercase letters and lowercase letters, reference lines L2 and L1 indicating positions indicating the upper limit of the size (size) of the character in the height direction, and reference lines L3 and L4 indicating positions indicating the lower limit, respectively. Is shown.

In the reference line table 32 of FIG. 9, a plurality of character codes Ci and reference line information BIi corresponding to each character code Ci are stored. Information L1 [Ci] to L1 indicating the position of the reference line as described in FIGS. 8A to 8F for the character code Ci corresponding to the reference line information BIi.
4 [Ci] is stored.

FIGS. 10A to 10H are diagrams for explaining an example of correcting a character as a recognition result according to the first embodiment of the present invention.

FIG. 11 is a diagram showing an example of the reference line correction rule table 33 applied to the first embodiment of the present invention. The reference line correction rule table 33 stores a plurality of character codes Ci and a reference line correction rule Ri corresponding to each character code Ci. As shown in FIGS. 8A to 8F or 9, the reference line correction rule Ri is obtained by changing the reference line Lk (Ci) for the corresponding character code Ci using the pen to the reference line Lj (Ci). (However, j） k) is moved to or near the position and corrected,
The corresponding character code Ci is the character code Cm (where m ≠
i) is converted to “Lk (Ci) → Lj (C
i): Cm "or" Lk (Ci) → Lj (Ci) +
α: Cm ”. As described above, the reference line correction rule Ri stores the change mode of the position of the reference line and the corrected character (character code) defined corresponding thereto. You.

Now, the user inputs the character string “pen” of the recognition result.
When "pen" is selected with the pen of the display-integrated tablet 1 in order to correct the character to uppercase (see FIG. 10 (A)), the display-integrated tablet 1 receives writing information indicating that "pen" is selected by the pen. Transfer to control unit 2. The control unit 2 searches for a character corresponding to the position indicated by the writing information transferred from the display-integrated tablet 1, and determines that the user has “p”,
It detects that "e" and "n" have been selected.

For example, the control unit 2 compares the maximum and minimum x-coordinate values indicated by the transferred writing information with the display position of each character of “pen” stored in the internal buffer 21 of the control unit 2 in advance. Then, a character that falls within the range indicated by the maximum and minimum x-coordinate values of the writing information is detected as the selected character.

Then, the control unit 2 reads the character code string information A2 of the recognition result of “p”, “e”, and “n” from the information storage unit 5 and transfers it to the information editing unit 3. Information Editing Department 3
Is "p" based on the given character code string information A2,
Based on the character codes of “e” and “n”, the corresponding reference line information BIi is read from the reference line table 32 of FIG. 9 and stored in the internal buffer 31. A reference line is displayed based on the line information BIi (see FIG. 10B). When the user instructs the reference line L2 among the displayed reference lines with a pen and moves the reference line to the position of the reference line L1 (see FIG. 10C),
The display-integrated tablet 1 detects the writing information of the pen at that time and transfers it to the control unit 2.

Then, the control unit 2 transfers the transferred writing information to the information editing unit 3, and the information editing unit 3 receives the transferred writing information, and starts and ends coordinates of the pen indicated by this information. And reference line information BIi (“L1 [p], L2 [p], L3
[P], L4 [p] "," L1 [e], L2 [e], L
3 [e], L4 [e] ”,“ L1 [n], L2 [n],
L3 [n], L4 [n] ", for example, L2 [p] represents the upper-limit reference line of lowercase" p ", and L4 [p] represents the lower-limit reference line of lowercase" p ". As a result, it is detected that the reference line L2 has moved to the position of the reference line L1, and the characters "p", "e", and "n" in the reference line correction rule table 33 (see FIG. 11) are detected. It is determined whether or not each of the character codes Ci satisfy the corresponding reference line correction rule Ri.

Here, in the correction rule Ri of “p”, if the reference line L2 is moved to the reference line L1 and corrected, the character code is changed to “P” (“L2 [p]).
→ L1 [p]: P ″, “→” indicates the direction of movement of the reference line. ":" Describes a code of a character to be changed if the rule is true. ), The lowercase letter “p” is modified to an uppercase letter “P”. The other lowercase letters "e" and "n" are corrected to uppercase letters "E" and "N", respectively, in a similar procedure.

Then, since the correction result is transferred to the control unit 2, the control unit 2 deletes the displayed reference line and uses the transferred correction result to change the recognition result of the information storage unit 5 to "P".
EN ”, and the display result of the display device of the display-integrated tablet 1 is updated (see FIG. 10D).

FIGS. 10 (E) to 10 (H) are display examples in which only the character “p” of the character string pen is corrected to uppercase, and the processing of each part is the same as that described above. is there.

(Embodiment 2) In Embodiment 1 described above, the position of the reference line is changed, so that the uppercase ← → lowercase is changed in the correction of the recognition result. In Embodiment 2, At the same time, the character is changed to a similar character having a similar shape. This will be described below.

FIG. 12 is a diagram showing an example of the contents of the reference line correction rule table 331 applied to the second embodiment of the present invention. The reference line correction rule table 331 stores a plurality of character codes Ci, rule number information RNi and one or more correction rules Ri for each character code Ci. The rule number information RNi indicates the number of the corresponding reference line correction rules Ri, and each of the reference line correction rules Ri uses the reference line Lk (Ci) with the reference line Lj using a pen.
(Ci) The character code Ci is changed to the character code Cm (however, i ≠ m) by being moved to or near the position (where k ≠ j) by “Lk
(Ci) → Lj (Ci): Cm ”or“ Lk (Ci)
→ Lj (Ci) + α: Cm ″.

Here, the character code Cm is the character code C
a character code corresponding to the uppercase or lowercase i
This is a character code of a character similar to the character shape of the character code Ci.

In FIG. 11, if it is determined in FIG. 7 that the reference line has been corrected (Yes in S206).
s) Based on the result of the determination, the information editing unit 3A determines that the uppercase / lowercase conversion target character in the correction target character string held in the internal buffer 31 is uppercase as described above. Correction is made to lowercase letters, uppercase if lowercase letters, or correction to characters with similar shapes, and the result of the correction is transferred to the control unit 2 and the completion of the process is notified.

The details will be described below. First, a procedure in which the user writes a character string “P9” on the tablet of the display-integrated tablet 1 with a pen and corrects the recognition result “pq” at that time will be described. At this time, it is assumed that the internal buffer 21 of the control unit 2 holds the character string “pq” of the recognition result and the display position of each character. FIG.
(E) is a diagram illustrating a procedure of character string correction according to the second embodiment of the present invention.

The user sets the first character "p" of the recognition result character string "pq" displayed on the display-integrated tablet 1 to an uppercase letter and the second character "q" to a character having a similar shape. When "pq" is selected with the pen of the display-integrated tablet 1 in order to correct it to "9" (see FIG. 13 (A)), the display-integrated tablet 1 changes the pen's writing information indicating that "pq" has been selected. Transfer to control unit 2. The control unit 2 searches for a character corresponding to the position information indicated by the writing information transferred from the display-integrated tablet 1, and the user inputs the characters “p” and “q”.
Detects that has been selected. This detection method is the same as that described above.

Then, the control section 2 reads the recognition result corresponding to the characters “p” and “q” from the information storage section 5 and transfers it to the information editing section 3A. The information editing unit 3A searches the reference line table 32 based on the character code string information A2 of “p” and “q” indicated by the transferred recognition result, reads the corresponding reference line information BIi, and reads the internal buffer. The control unit 2 displays the reference line detected by the information editing unit 3A on the display-integrated tablet 1 (see FIG. 13B).

When the user instructs the reference lines L1 and L3 among the displayed reference lines with a pen and moves them to the positions of the reference lines L2 and L4, respectively (see FIG. 13B), the display is stopped. The body type tablet 1 detects writing information of the pen and transfers it to the control unit 2. Then, the control unit 2 transfers the transferred writing information to the information editing unit 3A.

The information editing unit 3A receives the transferred writing information, and stores the start point coordinates and end point coordinates thereof and the reference line information BIi (L1 [p], L2
[P], L3 [p], L4 [p], L1 [q], L2
[Q], L3 [q], L4 [q]), it is detected that the reference line L1 has moved to the position of the reference line L2, and the character code of the reference line correction rule table 331 in FIG. It is determined whether Ci satisfies any of the corresponding reference line correction rules Ri for each of “p” and “q”.

That is, the second modification rule of “p” (FIG. 12)
If the reference line L1 is moved to the reference line L2 and the reference line L3 is moved to the reference line L4, the correction rule Ra is corrected to uppercase “P” (“L1 [p] → L2).
[P], L3 [p] → L4 [p]: P ″, “→” indicates the direction of movement, and “,” indicates logical product. Below ":", the code of the character to be changed if the rule is true is described. )
Therefore, the lowercase letter “p” to be corrected is corrected to the uppercase letter “P”. Next, the second correction rule (the correction rule Rb in FIG. 12) of the small letter “q” is changed from the reference line L1 to the reference line L.
2 and the reference line L3 has moved to the reference line L4, the number is changed to “9” (“L1 [q] → L2).
Since [q], L3 [q] → L4 [q]: 9 ”is specified, the correction target lowercase letter“ q ”is corrected to the number“ 9 ”.
Then, the correction result is transferred to the control unit 2.

The control unit 2 deletes the reference line displayed on the display-integrated tablet 1 and changes the recognition result of the information storage unit 5 to “P”.
9 ", and the recognition result of the display device of the display-integrated tablet 1 is updated and displayed using the correction result (FIG. 13E).
reference).

(Embodiment 3) In Embodiments 1 and 2 described above, the display size of a character is also changed in the font correction by uppercase-> lowercase conversion, but in this embodiment, this font correction is This is done without changing the size. This will be described below.

If it is determined in FIG. 11 that the reference line has been corrected (Yes in S206), information editing unit 3B
Based on the result of the determination, of the correction target character string held in the internal buffer 31, the uppercase / lowercase conversion target character is corrected to lowercase if uppercase and uppercase if lowercase. Is transferred to the control unit 2 and the completion of the process is notified (S207).
The control unit 2 deletes the reference line of the correction target character string displayed on the display-integrated tablet 1 (S209). Then, the recognition result of the information storage unit 5 is corrected, the character size of the character string to be corrected is detected, and the recognition result of the display device of the display-integrated tablet 1 is updated and displayed with the detected character size (S210). The process ends (S211).

The correction procedure for converting the case without changing the character size of the recognition result will now be described in detail. At this time, it is assumed that the display position of each character of the recognition result is held in the internal buffer 21 of the control unit 2.

FIGS. 14 (A) to 14 (H) are diagrams for explaining a procedure for correcting a recognition result character according to the third embodiment of the present invention. FIG. 15 is a diagram showing an example of the contents of the reference line correction rule table 332 applied to the third embodiment of the present invention. The reference line correction rule table 332 stores a plurality of character codes Ci, rule number information RNi and one or more reference line correction rule information R for each character code Ci.
i is stored. The correction rule number information RNi indicates the number of corresponding reference line correction rule information Ri.

The reference line correction rule information Ri in FIG. 15 is such that the reference line Lk (Ci) moves upward or downward under an AND condition with the correction rule Ri of the reference line correction rule table 331 described in FIG. Then, displaying the character code Cj at the same character height (same character size) is represented by Lk (Ci) → UP / DOWN: ♯Cj.

First, the user gives the recognition result “pen”
When “pen” is selected with the pen of the display-integrated tablet 1 to change the character height (size) to the same uppercase letter (see FIG. 14A), the display-integrated tablet 1 becomes “p”.
The writing information of the pen indicating that “en” has been selected is transferred to the control unit 2. The control unit 2 searches the character corresponding to the position of the writing information transferred from the display-integrated tablet 1 and determines that the user has selected "p", "e", or "n" according to the first or second embodiment. Detection is performed in the same manner as in 2.

Then, the control unit 2 transfers the recognition results of “p”, “e”, and “n” from the information storage unit 5 to the read information editing unit 3B. The information editing unit 3B transmits the transferred “p”,
The reference line information BIi is read from the reference line table 32 based on the character code string information A2 of “e” and “n” and stored in the buffer 31, and the control unit 2 displays the reference line detected by the information editing unit 3B. Display on the integrated tablet 1 (FIG. 14)
(B)).

The user operates the reference line L among the displayed reference lines.
When the reference line L1 is moved to the position of the reference line L2 and the position of the reference line L2 is slightly lowered (see FIG. 14C), the display-integrated tablet 1 is moved to the position of the reference line 1 and L2. The handwriting information is detected and transferred to the control unit 2.

Then, the control unit 2 transfers the transferred writing information to the information editing unit 3B, and the information editing unit 3B compares the start point coordinates and the end point coordinates of the writing information with the reference line information BIi stored in the internal buffer 31. Then, the reference line L1 becomes the reference line L
2 is detected, and the corresponding correction rule Ri is satisfied for each of “p”, “e”, and “n” of the character code Ci in the reference line correction rule table 332 (see FIG. 15). It is determined whether or not.

That is, the second character code "p" in FIG.
If the reference line L1 moves to the position of the reference line L2 and the reference line L2 moves downward, the correction rule Ra changes the character to the character of the character code "P" having the same character height. “L1 [p] → L2 [p], L2 [p] → dow
n ": ♯P, down is downward, and ♯ is the same character height (size).) Therefore, the character" p "is corrected to" P ". Similarly, “e” and “n” are corrected to the same character height (size) “E” and “N” by applying the correction rules Rb and Rc in FIG. Then, the correction result is transferred to the control unit 2.

The control unit 2 deletes the reference line displayed on the display-integrated tablet 1, corrects the recognition result of the information storage unit 5 to “PEN”, and changes the recognition result of the display device of the display-integrated tablet 1 to “PEN”. The same character size as in FIG.
N "(see FIG. 14D).

FIGS. 14 (E) to 14 (H) show display examples when the entire uppercase “PEN” is modified to lowercase “pen” of the same character height (character size). The processing of each unit is the same as that described above.

(Embodiment 4) The character correction device described above is realized by a program for causing a character correction process to function. This program is stored in a recording medium readable by the microcomputer of the control unit 2. In this embodiment, a memory (not shown) necessary for the processing by the apparatus shown in FIG. 1 as the recording medium, for example, a ROM itself, may be a program. Or a program medium that can be read by setting an external storage medium 10 in an external storage unit driver 9 that is a program reading device. In any case, the stored program may be configured to be accessed and executed by the microcomputer of the control unit 2, or the program may be read in any case, and the read program may be stored in the apparatus of FIG. The program may be loaded into a predetermined program storage area (not shown) and read and executed by the microcomputer of the control unit 2. It is assumed that this loading program is stored in advance in the main unit of FIG.

Here, the above-mentioned program media is
This is a recording medium that is configured to be separable from the main unit.
Disk system of optical disk such as ROM / MO / MD / DVD, card system such as IC card (including memory card) / optical card, or mask ROM, EPROM, E
It may be a medium that stores a fixed program including a semiconductor memory such as an EPROM or a flash ROM.

Further, since a configuration is adopted that is connectable to the communication network 8 including the Internet, a medium that carries the program in a fluid manner so that the program can be downloaded from the communication network 8 may be used. When the program is downloaded from the communication network 8 in this manner, the download program may be stored in the apparatus main body in advance, or may be installed in advance from another recording medium.

The content stored in the recording medium is not limited to a program, but may be data.

The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

[0111]

According to the character correcting device and the character correcting method according to the present invention, when the user wants to correct an error in a partial character string in a recognized character string displayed on the display unit, the user can modify the partial character string. Just by externally changing the position of the reference line displayed corresponding to the column, the applicable correction rule can be specified and the character can be automatically corrected using it. The user can easily perform character correction without feeling a burden, and is excellent in practicality.

[Brief description of the drawings]

FIG. 1 is a block diagram of a character correction device applied to each embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure when handwritten information is input using the display-integrated tablet in the apparatus of FIG. 1;

3A and 3B are diagrams illustrating an example of input of handwritten characters in the display-integrated tablet in FIG. 1;

FIG. 4 is a diagram showing a relationship between writing information and strokes obtained when inputting handwritten characters using the display-integrated tablet shown in FIG. 1;

FIG. 5 is a diagram showing an example of the contents of an information storage unit storing recognition results corresponding to FIG. 4;

FIG. 6 is a flowchart of character recognition and a result display by an OCR function according to each embodiment of the present invention.

FIG. 7 is a flowchart showing a procedure for correcting a character recognition result in the apparatus shown in FIG. 1;

FIGS. 8A to 8F are diagrams illustrating the relationship between a character font and a reference line according to each embodiment of the present invention.

FIG. 9 is a diagram showing an example of the contents of a reference line table corresponding to FIGS. 8A to 8F;

10 (A) to 10 (H) show Embodiment 1 of the present invention.
FIG. 9 is a diagram for explaining an example of correcting a character as a recognition result according to FIG.

FIG. 11 is a diagram showing an example of a reference line correction rule table applied to the first embodiment of the present invention.

FIG. 12 is a diagram showing a content example of a reference line correction rule table applied to the second embodiment of the present invention;

13 (A) to 13 (E) show Embodiment 2 of the present invention.
It is a figure explaining the procedure of the character string correction by.

FIGS. 14A to 14H are diagrams illustrating a procedure for correcting a recognition result character according to the third embodiment of the present invention.

FIG. 15 is a diagram showing a content example of a reference line correction rule table applied to the third embodiment of the present invention;

[Explanation of symbols]

1 display integrated tablet, 2 control unit, 3, 3A, 3
B information editing unit, 4 information input unit, 5 information storage unit, 8
Communication network, 10 external storage media, 21, 31,
41 buffer, 32 reference line table, 33, 33
1,332 reference line correction rule table, Ci character code, RNi correction rule number information, Ri reference line correction rule. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (5)

[Claims] A storage unit for storing a recognition character string based on a recognition result of character information; a display unit for displaying the recognition character string in the storage unit; Reference line display means for displaying a plurality of different reference lines for correcting a character string corresponding to the partial character string, When the position of one or more reference lines is changed by an external operation, the partial character string in the recognition character string in the storage unit is changed using a correction rule specified based on a mode of the position change. A character correcting device comprising: a character string correcting unit for correcting the character string. 2. The character correction device according to claim 1, wherein the correction rule is a rule for converting characters of the partial character string to uppercase / lowercase. 3. The character correction device according to claim 1, wherein the correction rule is a rule for converting a character of the partial character string into another character having a similar shape. 4. The correction rule according to claim 1, wherein the correction rule is a rule for converting characters of the partial character string into another character string having the same display size as the display size on the display unit. The character correction device described in Crab. 5. An information processing apparatus comprising at least a storage unit for storing a recognition character string based on a recognition result of character information, and a display unit for displaying the recognition character string in the storage unit. A character correction method for correcting, together with a desired partial character string in the recognized character string displayed on the display unit, a plurality of different reference lines for correcting the character string corresponding to the partial character string A reference line displaying step of displaying, when the position of one or more reference lines among the plurality of reference lines displayed by the reference line displaying step is changed by an external operation, based on the position change mode. A character string correction step of correcting the partial character string in the recognition character string in the storage unit using the correction rule specified by the method.