JPH11191141A - Communication system, control method therefor and computer readable memory - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication system capable of improving processing efficiency concerning a communication system for performing communication between a terminal to perfom character recognition and a central control unit(CCU). SOLUTION: Concerning image data read by a scanner 104 at a mobile terminal 100, the character recognition is performed by a character recognizing part 106. A character recognized result transmitting part 108 transmit is the character recognized result to a CCU 120. At the CCU 120, a character recognized result receiving part 122 receives the character recognized result from the mobile terminal 100. The received character recognized result is displayed on a display part 126. An input part 128 inputs an instruction for performing processing to the character recognized result. Based on that input, the post- processing of the character recognized result is performed by a character recognized result post-processing part 124.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system for performing communication between a terminal and a central controller, a control method thereof, and a computer-readable memory.

[0002]

2. Description of the Related Art Generally, a terminal having a character recognition device is:
The character recognition result in the terminal is transferred to the central control unit, where post-processing such as error correction, search, and storage of the character recognition result is performed. At this time, if the terminal determines that the accuracy of the character recognition candidate is low, the terminal recognizes the character recognition candidate as unrecognizable, transmits a predetermined identifier (hereinafter, referred to as a reject code) to the central control device, and cannot recognize the character. To the effect. Then, the central control device uses the reject code for correcting the character recognition result.

[0003]

However, in the above-mentioned conventional communication system in which communication is performed between a terminal and a central control unit, misrecognition and correction in the central control unit are performed indirectly using the context of a reject code. This method can be performed only by the method, and its accuracy is generally low. Especially, it is extremely difficult to correct the misrecognition and correction of a numerical value or the like having no context at all.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a communication system capable of improving processing efficiency in a communication system for performing communication between a terminal for performing character recognition and a central control device, and a control method for the communication system. A method for providing a computer readable memory.

[0005]

A communication system according to the present invention for achieving the above object has the following arrangement.
That is, a communication system for performing communication between a terminal and a central control device, the terminal comprising: reading means for reading a document as image data; and character recognition for performing character recognition on the image data read by the reading means. Means, first communication means for transmitting a character recognition result of the character recognition means to the central control device, and second communication means for receiving the character recognition result of the character recognition means from the terminal, A display unit that displays a character recognition result of the character recognition unit received by the second communication unit; an input unit that inputs an instruction for performing a process on the character recognition result; and, based on an input of the input unit, Post-processing means for performing post-processing of the character recognition result.

Preferably, the character recognition means includes:
A recognition unit that outputs recognition candidate characters for the image data using a recognition dictionary, and that determines whether the image data is unrecognizable based on the control signal, based on a determination result of the determination unit. Output the character recognition result.

Preferably, the determining means determines whether or not the image data is unrecognizable by comparing the similarity between the control signal and the recognition candidate character.

Preferably, the determination means determines that the image data is unrecognizable when the value indicated by the control signal is larger than the similarity of the recognition candidate character.

Preferably, when the result of the determination by the determining means is that the image data is unrecognizable, the character recognizing means indicates that the image data cannot be recognized as a recognition result corresponding to the recognition candidate character. Outputs a predetermined code.

Preferably, when there is image data determined to be unrecognizable by the determination means, the first communication means transmits the image data together with the character recognition result.

[0011] A control method of a communication system according to the present invention for achieving the above object has the following configuration. That is,
A control method of a communication system for performing communication between a terminal and a central control device, a reading step of reading a document as image data, and for the image data read in the reading step,
A character recognition step of performing character recognition, a first communication step of transmitting the character recognition result of the character recognition step to the central control device, and a second communication step of receiving the character recognition result of the character recognition step from the terminal Displaying a character recognition result of the character recognition step received by the second communication step;
An input step of inputting an instruction to perform processing on the character recognition result is provided, and a post-processing step of performing post-processing of the character recognition result based on the input of the input step.

A computer readable memory according to the present invention for achieving the above object has the following configuration. That is,
A computer-readable memory storing a program code for controlling a communication system that performs communication between a terminal and a central control device, wherein a program code for a reading step of reading a document as image data, and image data read in the reading step. A program code of a character recognition step of performing character recognition, a program code of a first communication step of transmitting a character recognition result of the character recognition step to the central control device, and a character recognition of the character recognition step from the terminal. A program code for a second communication step of receiving a result;
Based on a program code of a display step of displaying a character recognition result of the character recognition step received by the communication step, a program code of an input step of inputting an instruction for performing a process on the character recognition result, and an input of the input step. And a program code of a post-processing step of performing post-processing of the character recognition result.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a diagram showing a configuration of a communication system according to an embodiment of the present invention.

As shown in FIG. 1, the communication system includes a mobile terminal 100 and a central control unit 120. Also,
The mobile terminal 100 and the central controller 120 are connected through a wireless network 130. Note that, here, the mobile terminal 100 is configured by one mobile terminal 100 and the central control device 120, but the present invention is also applied to a case where a plurality of mobile terminals 100 are configured. When each mobile terminal of the plurality of mobile terminals 100 communicates with the central control device 120, for example, a different identification signal is issued to the central control device 120 so that each mobile terminal can be identified. , The central controller 120 can identify each mobile terminal.

In the mobile terminal 100, reference numeral 102 denotes a read original. Reference numeral 104 denotes a scanner that reads the read document 102 and generates an image signal. 106 is a scanner 104
Dictionary 106a for character recognition of the image signal generated by
This is a character recognition unit performed using. Reference numeral 106b denotes a non-recognizable determining unit that determines whether or not the character recognition candidate character output by the character recognizing unit 106 is unrecognizable based on a non-recognizable determination threshold. Reference numeral 108 denotes a character recognition result transmission unit that transmits a character recognition result by the character recognition unit 106 to the central control device 120.

In the central control unit 120, a character recognition result receiving unit 122 receives a character recognition result from the mobile terminal 100. Reference numeral 124 denotes a character recognition result post-processing unit that performs post-processing of the character recognition result received by the character recognition result receiving unit 122. Reference numeral 124a denotes a storage unit that stores data such as a processing result by the character recognition result post-processing unit 124. 12
Reference numeral 6 denotes a display unit for displaying a processing result by the character recognition result post-processing unit 124. Reference numeral 128 denotes an input unit for editing the processing result displayed on the display unit 126 such as correction.

The mobile terminal 100 and the central control unit 120
Each have a CPU, RAM, and ROM (not shown) mounted thereon, and the CPU mounted on each terminal executes various programs for controlling the devices stored in the ROM.
Deploy to AM and execute. The RAM also functions as a data work area and a temporary save area.

Next, the operation of the communication system according to the present embodiment will be described with reference to FIG.

Scanned document 1 prepared on mobile terminal 100 side
In step 02, an image signal corresponding to the read document 102 is generated by the scanner 104. The generated image signal is sent to the character recognition unit 1
06, and performs character recognition. Here, the character recognition unit 1
At 06, the similarity between the recognition-unrecognizable determination threshold and each recognition candidate character is compared. As a result of the comparison, when the similarity of the recognition candidate character is larger than the threshold for determination of non-recognition, the character code corresponding to the recognition candidate character is output as the recognition result. On the other hand, when the similarity of the recognition candidate character is smaller than the threshold for determination of non-recognition, it is determined that recognition is not possible, and a predetermined reject code and image data corresponding to the recognition candidate character are output.
The details of the processing executed by the character recognition unit 106 will be described later. The character recognition result transmitting unit 108 transmits the character code as the character recognition result by the character recognizing unit 106, the reject code indicating that the character cannot be recognized, and the image data corresponding to the unrecognizable character to the central control device 120 via the wireless network 130. I do.

On the other hand, in the central control unit 120, first, the character recognition result transmitted from the mobile terminal 100 is received by the character recognition result receiving unit 122. The received character recognition result is corrected by the character recognition result post-processing unit 124 and stored in the storage unit 12.
4a, a storage unit 124a using a character recognition result as a key
, And the result of the processing is displayed on the display unit 126. Then, the display unit 12
6 according to the processing result displayed on the input unit 1
Edit using 28.

Next, regarding the processing executed in the present invention,
This will be described with reference to FIGS. Here, the details of the processing executed by the character recognition unit 106 and the character recognition result post-processing unit 124, which are the main features of the present invention, will be described.

FIG. 2 is a flowchart showing processing executed by the character recognition unit according to the embodiment of the present invention.

First, in step S200, the mobile terminal 10
The character recognizing unit 106 within 0 performs character extraction for extracting characters from the image signal input from the scanner 104. Specifically, the relative coordinates of the character to be recognized in the image signal are obtained. In step S202, a predetermined feature is extracted from the character extracted in step S200. Step S204
Then, the similarity between the recognition target character image signal and the learning characters in the recognition dictionary 106a is calculated based on the features extracted in step S202. In step S206, a predetermined number of recognition candidate characters (the number of recognition candidate characters) starting from the one with the highest similarity
Just select and sort. The number of candidate characters is set in a recognition candidate character number register (not shown).

In step S208, the unrecognizable determining unit 10
In step 6b, the first candidate of the recognition candidate character, that is, the similarity of the recognition candidate character having the highest similarity is compared with the threshold for recognizing non-recognition. If the similarity of the first candidate is smaller than the threshold for determination of non-recognition (NO in step S208), the process proceeds to step S210, where the recognition target character is determined to be unrecognizable, and a predetermined identifier, that is, a reject code is output. Also,
The image data corresponding to the recognition target character at this time is also output. On the other hand, if the similarity of the first candidate is larger than the threshold for determination of non-recognition (YES in step S208), at least one character recognition result can be output, so that recognition is successful and the process proceeds to step S212.

In step S212, a recognition candidate character number counter i (not shown) for counting the number of processed recognition candidate characters.
Is substituted for 2. In step S214, it is determined whether or not the contents of the recognition candidate character number counter i have exceeded the number of recognition candidate characters set in the recognition candidate character number register. If the content of the recognition candidate character counter exceeds the number of recognition candidate characters (YES in step S214), there are no more recognition candidate characters, so the subsequent processing is stopped, and step S2 is performed.
Proceed to 16. Then, in step S216, all the character codes corresponding to the recognition candidate characters whose similarity exceeds the threshold for unrecognizable determination are output. On the other hand, if the content of the recognition candidate character counter i does not exceed the number of candidate characters (NO in step S214), the process proceeds to step S218.

In step S218, the degree of similarity of the i-th candidate is compared with a threshold value for determination of non-recognition. If the similarity of the i-th candidate is smaller than the threshold for determination of non-recognition (NO in step S218), it is determined that candidate characters subsequent to the i-th candidate are not recognizable, and the process proceeds to step S216. On the other hand, when the similarity of the i-th candidate is larger than the threshold for unrecognizable determination (Y in step S218)
ES), the process proceeds to a step S220, the recognition candidate character number counter i is incremented, and the process returns to the step S214.

Note that the recognition candidate character number register and the recognition candidate character number counter are each realized in the central control device 200, for example, on a RAM mounted on the device, or by being constituted by dedicated hardware. You.

FIG. 3 is a flowchart showing a process executed by the character recognition result post-processing unit according to the embodiment of the present invention.

In step 300, the character recognition result receiving section 1
From the character recognition result received from 22, it is determined whether or not the character recognition result of the target character is a reject code. If not a reject code (N in step S300
O), that is, if the character code is a normal character code, it is determined that no correction is necessary, and the process proceeds to step 308. On the other hand, if it is a reject code (YES in step S300),
It is determined that the target character cannot be recognized and needs to be corrected, and the process proceeds to step 302. In step 302, the image data corresponding to the unrecognizable character transmitted together with the reject code is developed in the work memory of the storage unit 124a. In step 304, the image data expanded in the work memory is displayed on the display unit 126. In step 306, the operator observes the image data corresponding to the unrecognizable character displayed on the display unit 126, and receives a correction input of the correct character from the input unit 128. In step 308, it is determined whether or not the target character is the last character recognition result in the received character recognition results. If it is not the last character recognition result (NO in step S308), the process returns to step S300. On the other hand, if it is the last character recognition result (step S
The process ends (YES in 308).

As described above, according to the present invention, for a character that is determined to be unrecognizable by the character recognition unit 106 of the mobile terminal 100, the image data is transmitted to the central control unit 120 together with a reject code. This allows
In the central control device 120, editing such as correction of a character recognition result which is a reject code as an unrecognizable character can be directly performed. Thereby, the processing efficiency in the character recognition result post-processing unit 124 can be significantly improved. Further, since only the image data of the unrecognizable character is transmitted from the mobile terminal 100 to the central control device 120, an increase in the communication load can be minimized.

In the above embodiment, the mobile terminal 100 transmits the image data corresponding to the unrecognizable character together with the reject code to the central occupational device 120. However, the present invention is not limited to this. For example, JPEG, JBIG, MM
After performing compression processing such as R in the mobile terminal 100,
The configuration may be such that the image data is transmitted to the central control device 120 and the compressed image data is decompressed. In this case, the data amount can be reduced.

In the above embodiment, the number of recognition candidate characters output by the character recognition unit 106 of the mobile terminal 100 is plural, but the present invention is not limited to this. For example, the recognition candidate character having the highest similarity may be determined as the only recognition candidate character, and a determination made by the non-recognition determining unit 106b may be performed on the recognition candidate character. In this case, the processing can be speeded up.

In the above embodiment, the wireless network 13
Mobile terminal 100, central controller 120
The communication system consisting of is described as an example,
It is not limited to this. For example, there is no problem with a communication system including terminals connected by a wired network and a central control device.

The present invention can be applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, a printer, etc.), but it can be applied to a single device (for example, a copying machine, a facsimile machine). Etc.).

An object of the present invention is to provide a storage medium storing a program code of software for realizing the functions of the above-described embodiments to a system or an apparatus, and to provide a computer (or CPU) of the system or apparatus.
And MPU) read and execute the program code stored in the storage medium.

In this case, the program code itself read from the storage medium implements the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention.

As a storage medium for supplying the program code, for example, a floppy disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD
-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

When the computer executes the readout program code, not only the functions of the above-described embodiment are realized, but also the OS (Operating System) running on the computer based on the instruction of the program code. ) May perform some or all of the actual processing, and the processing may realize the functions of the above-described embodiments.

Further, after the program code read from the storage medium is written into a memory provided on a function expansion board inserted into the computer or a function expansion unit connected to the computer, based on the instructions of the program code, It goes without saying that the CPU included in the function expansion board or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.

[0041]

As described above, according to the present invention,
In a communication system that performs communication between a terminal that performs character recognition and a central control device, it is possible to provide a communication system capable of improving processing efficiency, a control method thereof, and a computer-readable memory.

[0042]

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a communication system according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a process executed by a character recognition unit according to the embodiment of the present invention.

FIG. 3 is a flowchart illustrating a process executed by a character recognition result post-processing unit according to the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 terminal 120 central control device 130 wireless network 104 scanner 106 character recognition unit 106a recognition dictionary 106b recognition failure determination unit 108 character recognition result transmission unit 122 character recognition result reception unit 124 character recognition post-processing unit 126 display unit

Claims (13)

[Claims] 1. A communication system for performing communication between a terminal and a central control device, the terminal comprising: reading means for reading a document as image data; and character recognition for the image data read by the reading means. A character recognizing unit, a first communication unit for transmitting a character recognition result of the character recognizing unit to the central control unit, and a second unit for receiving the character recognition result of the character recognizing unit from the terminal. Communication means; display means for displaying a character recognition result of the character recognition means received by the second communication means; input means for inputting an instruction to process the character recognition result; and input means for inputting the input means. And a post-processing means for performing post-processing of the character recognition result. 2. The character recognition unit outputs recognition candidate characters for the image data using a recognition dictionary, and determines whether or not the image data is unrecognizable based on the control signal. The communication system according to claim 1, further comprising: outputting a character recognition result based on a determination result of the determination unit. 3. The apparatus according to claim 2, wherein the determination unit determines whether the image data is unrecognizable by comparing the similarity between the control signal and the recognition candidate character. A communication system as described. 4. The apparatus according to claim 2, wherein the determining unit determines that the image data is unrecognizable when a value indicated by the control signal is larger than a similarity of the recognition candidate character. Communication system. 5. When the image data is determined to be unrecognizable as a result of the determination by the determining unit, the character recognizing unit outputs a predetermined code indicating unrecognizable as a recognition result corresponding to the recognition candidate character. The communication system according to claim 2, wherein the communication is output. 6. The image processing apparatus according to claim 2, wherein when there is image data that is determined to be unrecognizable by the determination unit, the first communication unit transmits the image data together with the character recognition result. A communication system according to claim 1. 7. A control method for a communication system for performing communication between a terminal and a central control device, comprising: a reading step of reading a document as image data; and performing character recognition on the image data read in the reading step. A first communication step of transmitting a character recognition result of the character recognition step to the central control device; a second communication step of receiving the character recognition result of the character recognition step from the terminal; A display step of displaying a character recognition result of the character recognition step received by the communication step; an input step of inputting an instruction to perform a process on the character recognition result; and, based on the input of the input step, And a post-processing step of performing post-processing. 8. The character recognizing step includes outputting a recognition candidate character for the image data using a recognition dictionary, and determining whether the image data is unrecognizable based on the control signal. The control method of a communication system according to claim 7, further comprising: outputting a character recognition result based on a result of the determination in the determination step. 9. The method according to claim 8, wherein the determining step determines whether or not the image data is unrecognizable by comparing a similarity between the control signal and the recognition candidate character. A control method of the communication system according to the above. 10. The method according to claim 8, wherein the determining step determines that the image data is unrecognizable when a value indicated by the control signal is larger than a similarity of the recognition candidate character. Communication system control method. 11. When the image data is determined to be unrecognizable as a result of the determination in the determining step, the character recognizing step sets a predetermined code indicating unrecognizable as a recognition result corresponding to the recognition candidate character. The control method for a communication system according to claim 8, wherein the output is performed. 12. When there is image data determined to be unrecognizable by the determination step, the first communication step transmits the image data together with the character recognition result. 3. The control method for a communication system according to item 1. 13. A computer-readable memory storing a program code for controlling a communication system for performing communication between a terminal and a central control device, wherein: a program code for a reading step for reading a document as image data; For the read image data, a program code of a character recognition step of performing character recognition, a program code of a first communication step of transmitting a character recognition result of the character recognition step to the central control device, and A program code of a second communication step for receiving a character recognition result of the recognition step, a program code of a display step for displaying the character recognition result of the character recognition step received by the second communication step, and a process for the character recognition result A program code of an input step of inputting an instruction to apply, based on the input of the input step, A computer-readable memory, characterized in that it comprises a program code of the post-processing step of performing post-processing of the serial character recognition result.