JP5436040B2 - Image input / output device and monitoring system - Google Patents

Description

  The present invention relates to an image input / output device that can read and print an image, and a monitoring system that monitors illegal copying and the like.

  In recent years, when interest in information security has increased and important documents have been copied using an image input / output device, information such as the image of the document, the operator, the operation date and time, etc., is stored in the storage unit of the monitoring server as a log. A system is provided in which an administrator of an image input / output device can check an operator, an image, and the like using a monitoring server at a later date.

  In such an image input / output device and monitoring system, in order to search for an image, optical character recognition (hereinafter referred to as “OCR”) processing is performed on image data stored in advance as a log, and the operator, operation date and time, etc. In addition to the information, the OCR processing result is associated with the log and stored in the storage unit as “log data with image” (see, for example, Patent Document 1).

JP 2008-60807 A

  However, in the above conventional image input / output device, it is necessary to leave all image data as log data with an image for all read documents, the log capacity becomes enormous, a large-capacity storage device is required, There is a problem that the amount of search is enormous and the search time is long.

The present invention employs the following configuration in order to solve the above-described problems. That is, in an image input / output apparatus including an image reading unit that reads an image and a printing unit that prints the read image, a personal authentication unit that identifies an operator of the image reading unit, and the image reading unit Character recognition processing means for generating character strings by character recognition of image data; first storage means for storing first character string information for search; and the character strings generated by the character recognition processing means A search means for searching whether the first character string information exists, a character string searched by the search means for the presence of the first character string information , and words before and after the character string. Character string extraction means for extracting a character string and generating second character string information, and the first character string information is predetermined in the character string generated by the character recognition processing means based on a search result of the search means And a determining means for determining that it is necessary to store the second character string information to be included or, if the determination means determines that it is necessary to store the second character string information, The second character string information is stored in the second storage means in association with the personal authentication information authenticated by the personal authentication means.

According to the image input / output device of the present invention, in the image input / output device comprising an image reading unit for reading an image and a printing unit for printing the read image, a personal authentication unit for identifying an operator of the image reading unit; A character recognition processing means for generating a character string by recognizing the image data generated by the image reading means; a first storage means for storing first character string information for search; and the character recognition Search means for searching whether the first character string information exists in the character string generated by the processing means; and a character string searched by the search means for the presence of the first character string information ; A character string extraction unit that extracts a character string including words before and after the character string to generate second character string information; and the character string generated by the character recognition processing unit based on a search result of the search unit Comprising 1 character string information determination means that it is necessary to store the second character string information to be included more than a predetermined number, wherein the determination means stores the second character string information If it is determined that the second character string information needs to be stored, the second character string information is stored in the second storage means in association with the personal authentication information authenticated by the personal authentication means. In addition to minimizing the frequency, the search for monitoring can be performed efficiently and in a short time.

1 is a configuration diagram of an image input / output device of Embodiment 1. FIG. 1 is a functional block diagram of an image input / output device of Embodiment 1. FIG. 6 is a flowchart of an image log start operation of the image input / output device of Embodiment 1. FIG. 6 is a flowchart of a copy printing operation of the image input / output device of Embodiment 1. FIG. FIG. 6 is a flowchart of stored image retrieval and display operations of the image input / output device according to the first embodiment. FIG. 7 is an operation flowchart for copy printing of the image input / output apparatus according to the first exemplary embodiment. FIG. 3 is an exemplary diagram of a management file of the image input / output device according to the first embodiment. 6 is an operation explanatory diagram of log information storage of the image input / output device of Embodiment 1. FIG. 6 is a functional block diagram of an image input / output device according to Embodiment 2. FIG. 12 is an example of a genre-specific monitoring keyword table of the image input / output device of the second embodiment. FIG. 10 is a flowchart of an image log start operation of the image input / output device according to the second embodiment. FIG. 10 is a flowchart of an operation explanatory diagram of the image input / output device of Embodiment 2.

  Embodiments of the present invention will be described below with reference to the drawings. Elements common to the drawings are given the same reference numerals. In the following description, a multifunction printer (hereinafter referred to as “MFP”) in which an image reading unit, a printing unit, and the like are integrated as an image input / output device will be described as an example. Even if it is separated, the present invention can be similarly applied.

(Constitution)
FIG. 1 is a schematic configuration diagram of an image input / output apparatus according to the first embodiment. In the figure, a scanner unit 5 is arranged at the upper part of the image input / output device 1, and various setting operations such as a copy printing start instruction and setting of the number of prints, density, size, etc. are provided on the upper front. An operation unit 2 to perform is arranged.

  In addition, a plurality of stages of paper feed cassettes 3 are provided in the lower part of the image input / output device 1, and the paper feed cassettes 3 can be pulled out to the front with their respective handles. In addition, a paper discharge unit 4 is provided in the middle of the image input / output device 1, and a sheet fed from the paper feed cassette 3 and subjected to image formation is output to the paper discharge unit 4.

  FIG. 2 is a functional block diagram illustrating a functional configuration of the image input / output device 1 according to the first embodiment. As shown in the figure, the operation unit 2 has a function of acquiring a start instruction such as copy printing operated by the operator and various setting information, and the control unit 13 performs the copy printing from the operation unit 2. Upon receiving the instruction, the personal authentication unit 11 has a function of performing personal authentication of the operator. A monitoring server 40 is connected to the control unit 13 via a communication line or the like, receives an operator authentication execution command (to be described later), receives personal authentication, and receives a monitoring keyword set as a monitoring keyword. 26 has a function of storing the data.

  The personal authentication unit 11 stores personal authentication information in a contactless card or the like, and registers it in advance in the storage unit of the image input / output device 1 or the monitoring server 40 to give an operator when instructing copy printing or the like. The function of requesting the user to present a contactless card, reading the information in the presented contactless card, and performing personal authentication by collating with registered information. As described above, personal authentication may be performed by biometric authentication instead of card authentication. The personal authentication information may further include authenticated date and time information in addition to personal identification information such as an ID number.

  The scanner unit 5 has a function of optically reading an image of a document or the like set on a sheet feeder (hereinafter referred to as “scan”) and sending the image to an image processing unit 15 described later. The control unit 13 receives the result of the personal authentication of the personal authentication unit 11 and instructs the scanner unit 5 to scan the set document.

  The image processing unit 15 has a function of generating a desired image by performing an image process desired by the operator on an image acquired by scanning as an image for printing.

  The image primary storage unit 16 has a function of storing an image before image processing and an image created by the image processing unit 15.

  The OCR unit 17 has a function of receiving an image before image processing from the image primary storage unit 16 and performing character recognition processing. The search unit 18 functions as a search keyword search engine of the monitoring keyword database unit 26, and the character string extraction unit 25 searches the character string output from the OCR unit 17 by the search unit 18 for the presence or absence of the monitoring keyword. When there is, there is a function to extract the words before and after it.

  Based on the character string extraction result from the character string extraction unit 25, the information storage determination unit 19 determines whether to leave a log, for example, when there are more than a predetermined number of hit monitoring keywords, and needs to leave a log. If it is determined that there is a character string, the character string extracted by the character string extraction unit 25 is written into the monitoring character string storage unit 22 of the storage unit 24, and at the same time, the image is stored in the print image storage unit 21 of the storage unit 24. It has a function of giving an instruction, acquiring images for printing from the image primary storage unit 16, and writing them in the storage unit 24 in association with personal information. Note that when writing to the storage unit 24, each file name may be associated with personal information to form the management file 30.

  The print processing unit 20 has a function of performing print processing using the image data stored in the image temporary storage unit 16 and generating a printed material 23.

(Operation)
With the above configuration, the image input / output device of Embodiment 1 operates as follows. First, the operation for starting image log recording will be described with reference to the operation flowchart of FIG.

  First, when the monitoring server 40 transmits one or a plurality of pre-selected monitoring keywords to the image input / output device 1 to be described in an important document to be described later (step S01), the image input / output device. 1 registers the monitoring keyword in the monitoring keyword database unit 26 (step S02). At this time, the monitoring server 40 may be able to specify the number of words before and after a search keyword stored as a monitoring character string to be described later.

  The monitoring server 40 then transmits an image log recording start command to the image input / output device 1 (step S03), and when the image input / output device 1 receives the command, the image log recording is started (step S03). S04).

  Next, the operations of the monitoring server 40 and the image input / output device 1 when performing copy printing will be described using the operation flowchart of FIG.

  First, the image input / output device 1 authorizes the disclosure of copy printing to the monitoring server 40 before starting copy printing, and receives an operator authentication execution command from the monitoring server 40 in response to this, as described above. Operator authentication using a contactless card or the like of the operator is performed (step S11), and when authenticated, a copy printing operation is started (step S12).

  When the operator sets a document to be copied and printed on the sheet feeder, the image input / output device 1 scans and acquires the image, and reads characters written in the document by character recognition processing. A column is generated (step S13).

  The image input / output device 1 searches all the monitoring keywords to determine whether or not there is a monitoring keyword stored in the monitoring keyword database unit 26 in the extracted character string (step S14).

  Generally, there are cases where all half-width characters are mixed as a result of character recognition. In addition, as a result of character recognition, there are misread characters or unread characters, and therefore, when compared with the monitoring keyword, it is better to perform a process of matching even if there is a difference in the predetermined number of characters.

  When one or a predetermined number or more of monitoring keywords are hit, a character string including words before and after the character string hit by the monitoring keyword search in association with the personal authentication information of the operator (hereinafter referred to as “monitoring character string”). Is stored in the monitoring character string storage unit 22 of the storage unit 23, and the print image is stored in the print image storage unit 21 of the storage unit 23 (step S15).

  It should be noted that the image to be stored is preferably encrypted and stored with personal authentication information for security enhancement. As a method of extracting words before and after the hit character string, a known word string extraction technique may be used in JP-A-10-326275 or the like.

  Then, the monitoring character string is transmitted together with the personal authentication information to the monitoring server 40 (step S16). The monitoring character string to be transmitted is preferably encrypted with personal authentication information or the like for security enhancement.

  The monitoring server 40 that has received the monitoring character string or the like stores it as a monitoring character string in association with the received personal authentication information (step S17).

  As described above, the monitoring server 40 stores the monitoring character string in association with the personal authentication information, and forms a monitoring character string database. Using this database, the administrator of the monitoring server 40 can easily monitor copying and printing of important documents.

  Next, the operation of acquiring and displaying a print image stored in association with personal authentication information in the image input apparatus 1 will be described with reference to the flowchart of FIG.

  First, the administrator of the monitoring server 40 uses the monitoring character string database formed in the monitoring server 40 as described above to monitor from the monitoring character string that an important document has been copied and printed. When it is detected that the important document has been copied and printed, the personal authentication information is extracted, and a scan image acquisition request command is transmitted to the image input / output device 1 together with the personal authentication information (step S21).

  The image input / output device 1 that has received the scan image acquisition request command and the personal authentication information takes out the print image specified by the personal authentication information as the scan image from the print image storage unit 21 of the storage unit 24, and monitors the server. 40 (step S22).

  The monitoring server 40 receives the print image and displays it on the display unit of the monitoring server 40 so that the administrator can visually recognize it (step S23).

  Next, the operation of the image input / output device 1 during copy printing will be described in detail with reference to the flowchart of FIG.

  First, when the operator desires copy printing, sets a document or the like in the sheet feeder and designates copy printing, personal authentication is performed by an operator authentication execution command from the monitoring server 40 in response to a start request to the monitoring server 40 ( In step S31), the authentication result is determined (step S32). If personal authentication is not performed, the process is interrupted and the process is immediately terminated.

  If personal authentication is performed, scanning is performed to obtain a scanned image (step S33). Then, in order to perform OCR processing with high accuracy, edge enhancement processing is performed on the scanned image and temporarily stored in the image temporary storage unit 16 (step S34). Next, the image processing for printing which processes a scanned image into the printing image suitable for printing is implemented, and it memorize | stores temporarily. (Step S35).

  In addition, when performing special image processing for printing, the print image may be unsuitable as an image for performing OCR processing. Therefore, edge enhancement processing is performed separately from image processing for printing. Is good. Therefore, when the image processing for printing is processing similar to the edge enhancement processing, the edge enhancement processing in step S34 is not performed, and a print image that has been subjected to printing image processing for OCR processing may be used.

  Next, OCR processing is performed using the OCR image that has been subjected to the edge enhancement processing (step S36).

  Next, the character string extracted by performing the OCR process is searched by using a keyword stored in the monitoring keyword database 26 as a monitoring keyword (step S37). As a result, when it is determined that one or more than a predetermined number of monitoring keywords are included and the information needs to be stored (step S38), the character string for monitoring and the preceding and following words are also monitored. The data is stored in the monitoring character string storage unit 22 as a column (step S39).

  Next, when it is determined in step S38 that information needs to be stored, the print image temporarily stored for printing is further stored in the print image storage 21 (step S40).

  Then, after sending the monitoring character string and the personal authentication information to the monitoring server 40 (step S41), printing is performed using the print image that has been subjected to image processing for printing (step S42), and the copy printing process is terminated. .

  Next, the detailed configuration of each file stored in the storage unit 24 as the management file 30 in the image input / output device 1 during the above-described copy printing operation will be described below with reference to the management file illustrated in FIG. . The management file 30 includes a personal information management file 80 and a print log management file 90 for each individual.

  First, at the beginning of the personal information management file 80, an information storage number 80a is recorded as the number of people recorded as a log, and then a personal authentication number 80b (1) is recorded as a number for authenticating the individual. Next, the individual print log management file name 80c (1) is recorded as a pair with the personal authentication number 80b (1).

  In this example, the number of persons recorded as a log is n, the personal authentication number of the operator recorded first is “XX987”, and the print log management file name 80c (1) for each person is “ABC123”. This is an example.

  Similarly, the print log management file name 80c and the personal authentication number 80b for each person are recorded in pairs for the number of people recorded in the log, that is, the number of information storages 80a, and the last nth log As a result, a personal authentication number 80b (n) and a personal print log management file name 80c (n) are recorded.

  The individual print log management file 90 is an entity file corresponding to each individual print log management file name 80c (1) to 80c (n) recorded in the personal information management file 80, and the first personal authentication number. An individual print log management file “ABC123” is formed as an entity file of the individual print log management file name “ABC123” of “XX987” with the following configuration, and an individual print log management file is formed in order, Finally, the individual print log management file “DEF567” is formed as the entity file of the individual print log management file name “DEF567” of the personal authentication number “YY654” as shown in the lower right.

  At the top of the print log management file 90 for each individual, the number of log files that are determined to be left as a log, including the monitoring keyword, among the documents copied and printed by each operator according to the determination in step S38 in FIG. 6 is stored in the log file. The numbers 90a (11) and 90a (21) to 90a (n1) are recorded. The number of log files corresponds to, for example, the number of document pages determined to be left as a log.

  In this example, the number of log files in which the monitoring keyword is included in the document copied and printed by the operator with the first personal identification number “XX987” is m1, and the operator with the nth personal identification number “YY654” is copied. The number of log files in which the monitoring keyword is included in the printed document is mn, and this is recorded at the top.

  Next, the date and time of copy printing is recorded as the printing date and time 90b (11), 90b (21) to 90b (n1).

  Next, 90c (11), 90c (90c (11), 90c () as the monitoring character string file names stored in step S36 of FIG. 21) to 90c (n1), and print image file names 90d (11) and 90d (21) to 90d (n1) for storing print images are recorded in step S37 of FIG.

  Similarly, the printing date and time of the document including the monitoring keyword, the file name for storing the monitoring character string, and the file name for storing the print image are recorded.

  FIG. 8 is a diagram for explaining the operation of the image input / output apparatus according to the first embodiment in more detail using specific examples of monitoring keywords and document examples.

  In the figure, as shown in the upper part, keywords to be monitored are stored in the monitoring keyword database 26, and the operator of the personal authentication number “XX987” copies and prints the document of the scan image 50 described in the middle part. In this example, a log as shown in the storage unit 24 is formed.

  Then, as recorded at the top of the personal information management file 80 of the storage unit 24 shown at the bottom, 98 operators are recorded as a log, and are recorded at the top of the print log management file 90 for each individual. In this example, 53 logs are generated as the logs of the operator with the personal authentication number “XX987”.

  First, when the scanned image 50 is recognized, a character string is extracted, and a search is performed using the monitoring keyword set as the monitoring keyword 26x, "confidential", "handling attention" indicating the important document, and the creator are specified. ○ × Industry ”,“ Takasaki City, Gunma Prefecture ”hit.

  Depending on the search result, that is, when one or a predetermined number or more hits, the personal information management file 80, the individual print log management file 90 (file name: “ABC123”), the monitoring character file are stored in the storage unit 24. 100 (file name: “MJ123”) and print image file 110 (file name: “IM123”) are recorded as logs, and a log is formed as shown in FIG.

  The log is formed in the image input / output device 1, and at the same time the personal information management file 80, the personal print log management file 90 (file name: “ABC123”), and the monitoring character file 100 (file name: A file corresponding to “MJ123”) is formed, and the character string file corresponding to the monitoring character string file 100 is used to efficiently and appropriately monitor the document to be monitored.

(Effect of Example 1)
As described above in detail, according to the image input / output device and the monitoring system of the first embodiment, the personal authentication unit that authenticates the operator based on the personal authentication information, the character recognition unit that reads the character string from the document to be copied and printed, , Means for preliminarily storing a monitoring keyword, search means for searching whether the read character string includes the monitoring keyword, and determining whether to store as a monitoring character string based on a search result by the search means Information storage determination means, and the monitoring character string and the image data can be stored in association with the personal authentication information based on the determination result of the information storage determination means, so that the capacity of the monitoring log is minimized. And can be monitored efficiently.

(Constitution)
FIG. 9 is a block diagram illustrating a functional configuration of the image input / output device according to the second embodiment. As shown in the figure, in the image input / output device of the second embodiment, instead of the character string extraction unit 25 of the first embodiment, the stored keywords are classified into categories according to the types of important documents. A character string extraction unit 35 is provided. Other configurations are the same as the configurations described with reference to FIG. 2 of the first embodiment, and thus detailed description thereof is omitted for the sake of brevity.

  FIG. 10 shows a configuration example of the genre-specific monitoring keyword table transmitted from the monitoring server 40 and registered in the monitoring keyword database 26 of the image input / output device 1.

  Examples of genre information of important documents include contracts, minutes, applications, accounting materials, etc., which are used as genre information, and the number of front characters to be recorded as a character string before and after each monitoring keyword of each genre. If the number of rear characters is Nb, it is described as (Nf: Nb) and registered together with each monitoring keyword.

  In the case of a contract, “contract”, the company name of the company equipped with the image input / output device 1, the name of the officer, etc., the location, etc. are described, so the location excluding the lot number is registered as a monitoring keyword. .

  For example, in the case of “sales basic transaction contract”, the entire contract name is formed if there are about 10 characters as the front character of the character string of “contract” and 1 character as the rear character. , “Contract” (10: 1). Similarly, the locations excluding company name, officer name, and lot number are registered as company name (0: 0), officer name (0: 0), and location excluding lot number (0:10).

  In addition, examples of important documents for the minutes include the minutes of the board of directors meetings, etc. "Agenda", company name, and officer name are usually described, and these are used as monitoring keywords. If there are 5 characters such as “Board of Directors” and 1 character as the back character, the name of the minutes will be formed, so register as “Agenda” (5: 1). Similarly, the company name and officer name are registered as company name (0: 0) and officer name (0: 0).

  In the case of an officer name, only the name side may be registered as a monitoring keyword, and about 5 characters on the front side may be added and recorded as a monitoring character string. In this case, the officer name (5: 0) may be registered.

  In the case of the application form, the document that contains the personal information that identifies the individual is an important document, and “birth date”, “age”, “age” are the monitoring keywords, and “birth date” Then, if the subsequent 10 characters are added, a series of character strings is completed, so registration is made as “birth date” (0:10). Similarly, in the case of “age”, adding about 3 characters in front of “age” completes a series of character strings, so registration is made as “age” (3: 0).

  In the case of accounting materials, “\”, “yen”, and “memories” as a unit are important documents. In the case of “¥”, the last 10 characters “yen” In this case, since it is sufficient to add the previous 10 characters and record it as a monitoring character string, the description as shown in FIG.

(Operation)
With the above configuration, the image input / output device of Embodiment 2 operates as follows. First, an operation for starting image log recording will be described with reference to an operation flowchart of FIG.

  First, when the monitoring server 40 transmits the monitoring keyword selected as a character string that will be described in the important document and its genre information to the image input / output device 1 (step S51), the image input / output device 1 that has received the keyword is received. Registers the monitoring keyword and its genre information in the monitoring keyword database unit 26 (step S52). When the monitoring server 40 is hit by a monitoring keyword, the number of characters to be recorded as a character string before and after the character string may be designated.

  Subsequently, the monitoring server 40 transmits an image log recording start command to the image input / output device 1 (step S53), and the image input / output device 1 starts recording an image log (step S54).

  Next, the operation of the image input / output device 1 during copy printing will be described in detail with reference to the flowchart of FIG. Since steps S61 to S66 and S70 to 72 are the same as steps S31 to S36 and S40 to 42 of the first embodiment, the description thereof will be simplified.

  First, when the operator desires copy printing, sets a document or the like in the auto feeder and designates copy printing, personal authentication is performed by a non-contact card or the like as in the first embodiment, and if the result of determination is that the authentication is successful. The process is continued, and if the authentication is not successful, the process is interrupted and immediately terminated (steps S61 and S62).

  If personal authentication is performed, scan is performed to obtain a scanned image, and in order to perform OCR processing with high accuracy, edge enhancement processing is performed on the scanned image, OCR processing is performed, and printing is performed on the scanned image. Image processing is performed, and a print image suitable for printing is processed and temporarily stored (steps S63 to S66).

  Next, the monitoring server 40 uses the monitoring keywords stored together with the number-of-characters information added before and after each genre, as in the example of the genre monitoring keyword table in FIG. It is searched whether or not the monitoring keyword of the genre designated from the above is in the character string by OCR processing (step S67).

  As a result of the search, when it is determined that the monitoring keyword is included and information storage is necessary, the monitoring character string including the monitoring keyword and the preceding and following characters are also displayed for each genre based on the number-of-characters information added before and after. The print image stored in the monitoring character string storage unit 22 and temporarily stored for printing as described above is stored in the print image storage 21 (steps S68 to S70).

  For example, “contract” is selected as the genre of the genre monitoring keyword table in FIG. 10 for the character string extracted by the OCR process, and “sales basic transaction contract” is described as an example of an important document. When the contract is copied and printed, the character string “contract” is hit from “contract” (10: 1), which is one of the monitoring keywords, and the number of characters on the front side and the character string on the back side are 10 characters. Extracted, “XXX trading basic transaction” + “contract” + “book” is extracted as a monitoring character string.

  Then, after transmitting the extracted monitoring character string and personal authentication information to the monitoring server 40, printing is performed using the print image that has been subjected to image processing for printing (steps S71 and S72), and the copy printing process is terminated. .

(Effect of Example 2)
As described above in detail, according to the image input / output device and the monitoring system of the second embodiment, the personal authentication unit that authenticates the operator based on the personal authentication information, the character recognition unit that reads the character string from the document to be copied and printed, , Means for storing a monitoring keyword for each genre information, search means for searching whether the read character string includes the monitoring keyword, and whether to store as a monitoring character string based on the search result An information storage determination means for determining, and because the monitoring character string and the image data can be stored in association with the personal authentication information based on the determination result of the information storage determination means, in addition to the effects of the first embodiment, It is possible to classify by genre and take logs, and to monitor more efficiently.

<< Other modifications >>
In the above description of the embodiment, it has been described that the monitoring character string and the print image are stored as a log as a pair. However, only the print image may be stored as a log, and the print image may be visually monitored. Only the character string may be stored as a log and monitored.

  In the above description of the embodiment, it has been described that the monitoring keyword database unit 26, the print image storage unit 21, and the monitoring character string storage unit 22 are provided in the image input / output device 1, but some or all of them are provided. It is good also as a structure provided in the monitoring server 40. FIG.

  INDUSTRIAL APPLICABILITY The present invention can be widely used in an image input / output device that can read and print an image, and a monitoring system that monitors unauthorized copying and the like.

DESCRIPTION OF SYMBOLS 1 Image input / output apparatus 2 Operation part 5 Scanner part 11 Personal authentication part 13 Control part 15 Image processing part 16 Image temporary storage part 17 OCR part 18 Search part 21 Print image storage part 22 Monitoring character string storage part 24 Accumulation part 25 Character Column extraction unit 26 Monitoring keyword database unit 30 Management file storage unit 35 Keyword genre character string extraction unit 40 Monitoring server 50 Scan image 80 Personal information management file 90 Personal print log management file 100 Monitoring character string file 110 Print image file

Claims (10)

In an image input / output device comprising an image reading means for reading an image and a printing means for printing the read image,
Personal authentication means for identifying an operator of the image reading means;
Character recognition processing means for recognizing the image data generated by the image reading means to generate a character string;
First storage means for storing first character string information for search;
Search means for searching whether the first character string information exists in the character string generated by the character recognition processing means;
A character string extraction means for extracting a character string searched for when the first character string information is present by the search means and a character string including words before and after the character string and generating second character string information;
When the character string generated by the character recognition processing means includes a predetermined number or more of the first character string information based on the search result of the search means, the second character string information needs to be stored. Determination means for determining,
If the determination means determines that the second character string information needs to be stored, the second character string information is associated with the personal authentication information authenticated by the personal authentication means in the second storage means. An image input / output device characterized by storing.   2. The image input / output apparatus according to claim 1, wherein the image data generated by the image reading means in association with the personal authentication information is also stored in the second storage means.   2. The image input / output apparatus according to claim 1, wherein the search by the search means is performed while allowing a predetermined number of characters to be mismatched.   2. The image input / output apparatus according to claim 1, wherein the first character string information is character string information for monitoring unauthorized duplication. The first storage means for storing the first character string information is a type information storage means capable of classifying and registering a plurality of the first character string information,
The character string extracting means for generating the second character string information, when the character string information of the specified type is present in the character string generated by the character recognition processing means, Extraction means for extracting a character string as second character string information,
The determination means determines that the second character string information is stored based on a search result for each type when the first character string information is included in the character string generated by the character recognition processing means. Means,
Based on the determination result of the determination means , if the first character string information is included in the character string generated by the character recognition processing means, the second character string information is authenticated by the personal authentication means. 2. The image input / output apparatus according to claim 1, wherein the image input / output apparatus is stored in the second storage means in association with the personal authentication information.   6. The image input / output apparatus according to claim 5, wherein the image data generated by the image reading means in association with the personal authentication information is also stored in the second storage means.   7. The image input / output device according to claim 5, wherein the front and rear character strings are character strings corresponding to the number of front and rear characters set in advance for each first character string information.   8. The image input / output apparatus according to claim 5, wherein the type information is information for classifying a document type. An unauthorized copy monitoring system comprising at least the image input / output device according to any one of claims 1 to 8 and an external device connected to the image input / output device and monitoring unauthorized copying,
The image input / output device transmits the second character string information stored in the second storage means using the control unit and personal authentication information associated with the second character string information to the external device. Send to
The external device stores the second character string information and personal authentication information associated with the second character string information in association with each other, and the second character string information stored in the storage means And monitoring means for monitoring personal authentication information associated with the second character string information,
A monitoring system characterized by that. The monitoring system according to claim 9, wherein
The external device had a copy print of an important document from the second character string information stored in the storage means using the monitoring means and the personal authentication information associated with the second character string information. When the personal identification information associated with the second character string information stored in the storage means is extracted, the extracted personal authentication information and the scan image acquisition request command are sent to the image input / output device. To
The image input / output device transmits the image data of the image printed with the image data specified by the personal authentication information and generated by the image reading unit to the external device;
A monitoring system characterized by that.

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