JP2008225631A - Document management system and management method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a document management system maintaining the visibility and design of a document, reducing cost and load during document preparation than before, and to provide a management method therefor. <P>SOLUTION: This document management system 10 sets data of security for a document and data of a seal included in information written in the document by a seal registration device 18, combining the data to generate registration data 38, registers them, outputs the data 50 of the seal to a document management device 14 from a security decision device 20, collates the seal data of the previously registered registration data and the data of the seal included in the information written in the document desired with output by the document management device 14, supplies the data of the security of the corresponding registration data to the security decision device 20 when they correspond by the collation, and it is decided whether or not the security decision device 20 permits subsequent processing based on the data 46 of the security. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a document management system and a management method thereof, and more particularly to a system that applies image search technology and dynamically changes and manages security in various documents and slips.

  So far, for example, security is set for a document created by a company organization according to the content of the document. In accordance with this setting, stamps such as “confidential” and “important” are stamped on the document, and a symbol indicating security is printed in the document, thereby classifying the document management level. Document management has been used for the purpose of prohibiting browsing and copying according to this classification.

  However, the value of a document has a correlation with the period and place, and the importance of the document often decreases as the conditions of the period and place change. As described above, the document information is considered to have a change in value such as the expiration date in time and place. For this reason, if the document security is permanently the same, there is a problem that document management becomes complicated only by increasing the number of documents having a high management level.

As an example of a method for improving this problem, for example, Patent Document 1 and Patent Document 2 are proposed. Patent Document 1 enables document management by printing a barcode in a document and reading the barcode information. In Patent Document 2, an RFID (Radio Frequency IDentification) chip is provided in a document to enable document management. Therefore, it can be assumed that electronic management of the document itself becomes possible by using such barcode information and RFID information. For this reason, it is thought that the above-mentioned problem can be improved.
JP 2002-157392 A JP 2006-139568 C. Harris and M. Stephens, “A combined corner and edge detector”, Proceedings of the Fourth Alvey Vision Conference, Manchester, pp.147-151, 1988, [online], [searched February 19, 2007], Internet <URL: http://www.csse.uwa.edu.au/~pk/reseach/matlabfns/Spatial/Docs/Harris> N. Sebe and MS Lew, “COMPARING SALIENT POINT DETECTORS”, Proc. IEEE Int. Conf. OnMultimedia and Expo, pp.65-68, 2001, [online], [February 19, 2007 search], Internet < URL: http://citeseer.ist.psu.edu/sebe01comparing.html>

  However, these systems use special paper or devices that print barcodes in the document or embed RFID. For this reason, the document creation process becomes complicated. This processing places a burden on the document creator and increases the cost. Further, for example, printing of a barcode that is not related to the content of the document may impair the design of the document.

  Furthermore, things like RFID cannot be used to easily check document security. In this case, since a special reading device is prepared in advance for this confirmation, there is a problem in use of the document attached to the RFID.

  The present invention provides a document management system and a management method thereof that eliminate such drawbacks of the prior art, maintain visibility and document design, enable cost reduction, and have a smaller load at the time of document creation. The purpose is to do.

  In order to solve the above-mentioned problem, the present invention extracts first image input means for capturing information described in a document as an image, extracts an image of a seal area included in the captured image, and extracts the image of the seal area from the extracted image First feature extraction means for obtaining feature points as feature point data, and seal registration including first control means for setting security for a document, generating registration data in which feature point data and security are combined, and outputting the registration data Apparatus and second image input means for capturing information described in a document requiring determination as an image, extracting an image of a seal area included in the captured image, and extracting feature points from the extracted image of the seal area as feature point data Second feature extraction means obtained as a search control means for generating and outputting search data including feature point data and requesting search; Security judging device including a second control means for generating a control signal according to whether printing is possible in a document requiring printing, storage means for handling and storing feature point data and security as a set, search data and read registration data The collation means for collating the feature points, and the writing to the storage means is controlled in response to the supply of the registration data, the registration data is read from the storage means in response to the supply of the search data, and the feature points of the search data are read A document management device including a third control unit that controls collation with the feature points of the data, reads out stored security corresponding to the storage unit according to the collation match, and outputs the stored security to the security determination device; Features.

  In order to solve the above-mentioned problem, the present invention sets seal data included in information described in a document and security data for the document, and combines registration data and security data to obtain registration data. The first step of generating and registering and the second step of matching the stamp data included in the information described in the document desired to be output with the stamp data of the registered data registered in advance matched and matched A third step of determining whether or not to allow subsequent processing based on the security data of the matched registration data, wherein the third step outputs a permission control signal according to the determination result to be permitted. A prohibition control signal is output according to a determination result to be output and prohibited.

  According to the document management system and the management method according to the present invention, the seal data and the security data for the document are set in the seal registration device, and the seal data and the security data are combined. Registered data is generated, registered, and the seal data included in the information described in the document desired to be output from the security judgment device is output to the document management device, and is described in the document desired to be output by the document management device. The data of the seal included in the information is compared with the seal data of the registered data registered in advance. If the data matches and matches, the security data of the matching registered data is supplied to the security judgment device, and is supplied by the security judgment device. Based on the security data, determine whether to allow further processing, and according to the determination result By outputting a permission control signal and outputting a prohibition control signal according to the determination result to prohibit, the seal data and the security data for the document are managed in association with each other, and the current security is determined based on the security data. This enables flexible document management. In addition, the document management system and its management method improve visibility for people who understand the meaning of registered seals, and do not impair document design for those who do not understand the meaning of seals. Security on document management can be set according to the level. Further, since it is not necessary to embed a special chip in the document, security can be managed according to the level only by imprinting or printing a seal, which can be implemented at low cost. Furthermore, since it is not necessary to add a barcode or RFID when creating a document, the load at the time of document creation can be reduced compared to the method of adding the barcode or RFID.

  Next, an embodiment of a document management system according to the present invention will be described in detail with reference to the accompanying drawings. Referring to FIG. 1, in the embodiment of the document management system according to the present invention, the seal registration device 18 sets the seal data and the security data for the document included in the information described in the document, and the seal data and the security data. To generate registration data 38, register it, and output the seal data 50 included in the information described in the document desired to be output from the security judgment device 20 to the document management device 14 and output it by the document management device 14 The data of the seal included in the information described in the desired document is compared with the seal data of the registered data registered in advance. The security judgment device 20 determines whether or not to permit subsequent processing based on the security data 46 supplied by the security judgment device 20, and permits it. It outputs a permission control signal according to the determination result, and outputs the disable control signal according to the determination result of prohibiting. As a result, the document management system 10 associates and manages the seal data and the security data for the document, can determine the current security based on the security data, and enables flexible document management.

  In this embodiment, the document management system of the present invention is applied to the document management system 10. The illustration and description of parts not directly related to the present invention are omitted. In the following description, the signal is indicated by the reference number of the connecting line in which it appears.

  As shown in FIG. 1, the document management system 10 includes a terminal device 12 and a document management device 14. The terminal device 12 and the document management device 14 are each connected to, for example, the Internet 16 and communicate with each other via the Internet 16.

  The terminal device 12 includes a seal registration device 18 and a security determination device 20. Further, the terminal device 12 may be only one of the seal registration device 18 and the security determination device 20. The seal registration device 18 has a function of extracting a seal from a document and transmitting it to the document management device 14, and includes an image acquisition unit 22, a feature extraction unit 24, a control unit 26, and a communication unit 28. The image acquisition unit 22 shoots a document using, for example, a CCD (Charge Coupled Device) type or C-MOS (Complimentary-Metal Oxide Semiconductor) type digital camera / scanner optical device, and stores the obtained image data 30 It has the function to do. The image acquisition unit 22 inputs and outputs image data according to the control of the control unit 26. The image acquisition unit 22 may include an optical digitizing function. The image acquisition unit 22 outputs the image data 32 to the feature extraction unit 24.

  The feature extraction unit 24 has a function of extracting the image data of a seal as a specific feature amount from the supplied image data 32. The feature extraction unit 24 uses the feature extraction methods of Non-Patent Document 1 and Non-Patent Document 2 under the control of the control unit 26 to extract the characteristic features of the seal shape. Non-Patent Document 1 is a method for detecting local protruding points of an object shape using a Harris function or the like. Non-Patent Document 2 is a method for detecting local protruding points of an object shape using wave red. The feature extraction unit 24 compares the vector quantities of the local feature quantities using, for example, a Euclidean distance calculation method, and enables retrieval of similar image data. Such utilization of local features makes it possible to search for an image with a smaller amount of data than to search for image data itself, thereby enabling high-speed processing. The feature extraction unit 24 outputs document image data and data 34 indicating the stamp feature amount to the control unit 26.

  The control unit 26 controls the feature extraction unit 24, acquires the data 34 detected by the feature extraction unit 24 together with the document image data, sets security including an expiration date in the data indicating the seal feature amount, and registers the data. It has a function of generating a control signal to instruct. The control unit 26 has a function of supplying the document image data 36 to a monitor (not shown). The control unit 26 outputs registration data 38 to the communication unit 28 as a registration signal.

  Here, the security means a management period and a department / department. The security period as an expiration date is a security start date and a security end date. The security level is a department ID or a department ID. It is desirable to input the security period and department ID while confirming them using an input unit and a display unit (not shown).

  The communication unit 28 has a function of communicating with the document management device 14 via the Internet 16. The communication unit 28 transmits the registration data 38 as registration data 40 to the document management apparatus 14.

  The security determination device 20 has a function of inputting a seal and determining a seal, and includes an image acquisition unit 22, a feature extraction unit 24, a control unit 42, a search control unit 44, and a communication unit 28. Although not shown, the control unit 42 has a function of controlling the image acquisition unit 22, the feature extraction unit 24, and the search control unit 44. In addition, the control unit 42 receives information 46 including security attached to the feature amount that matches the collation result, compares the security information 46 with the information held by the control unit 42, generates and outputs an instruction control signal 48. It has a function. The controller 42 has a timer (not shown). Specifically, the control unit 42 compares the security information 46 indicating the expiration date with information on the timer, and generates an instruction control signal 48. When the control unit 42 determines that the security expiration date has passed, the control unit 42 generates and outputs an instruction control signal 48 that enables printing of the print document. If the control unit 42 determines that the expiration date has not passed, the control unit 42 generates and outputs an instruction control signal for prohibiting printing. Instead of simply generating an instruction control signal for prohibiting printing, the control unit 42 may control the user by, for example, requesting a password, raising the management level, and confirming it.

  The search control unit 44 has a function of receiving a local feature amount of image data in a print document from the feature extraction unit 34 as data 34, and generating and outputting a search control signal 50 including the data 34 as search data. Further, the search control unit 44 has a function of receiving data 50 as a collation result from the document management apparatus 14 via the communication unit 28, and outputting the collation result as security information 46 to the control unit 43. Thus, the search control unit 44 outputs the search control signal 50 and the security information 46, and inputs the data 50 including the security information that is the search result.

  The communication unit 28 in the security determination device 20 communicates the data 52 with the document management device 14 via the Internet 16. The document management device 14 communicates the data 54 with the seal registration device 18 and the security determination device 20 via the Internet 16.

  The document management apparatus 14 is a management server and includes a communication unit 28, a control unit 56, a data storage unit 58, and a collation unit 60. The document management device 14 has a function of managing the seal data stored in response to requests from the seal registration device 18 and the security determination device 20. In particular, the document management device 14 has a function of registering the data 54 in response to a request from the seal registration device 18, and a function of collating the similarity between the features of the data 54 and the seal data stored in the document management device 14. Have both.

  The control unit 56 outputs the supplied data 62 to the data storage unit 58 and the verification unit 60 via the communication unit 28, respectively. The control unit 56 has a function of controlling registration in the data storage unit 58 in accordance with the supplied data 62. When the supplied data 62 is the registration data 38, the control unit 56 outputs the data 64 to the data storage unit 58. Further, the control unit 56 has a function of controlling the collation unit 60 in accordance with the supplied data 62. When the supplied data 62 is the search control signal 50, the control unit 56 outputs the data 66 to the collation unit 60.

  The data storage unit 58 is a storage, stores stamp data 64 including security information set according to the control of the control unit 56, and stores the seal data 64 stored in the determination via the control unit 56. It has a function to read out. The collation unit 60 has a function of supplying data supplied from the data 62 and the data 64 as data 66 in accordance with the control of the control unit 56, and searching for an image. The collation unit 60 performs collation using a conventionally known Euclidean distance calculation method described in the feature extraction unit 24 described above. The collation unit 60 outputs data 66 indicating the collation result to the control unit 56. The control unit 56 outputs data 62 to the security determination device 20 via the communication unit 28.

  Next, the registration procedure in the document management system 10 will be described with reference to FIG. The seal registration device 18 captures the document 70 including the supplied seal using an optical device, obtains captured image data, and stores it in the image acquisition unit 22 (step S10). The document 70 includes a seal 72 as shown in FIG.

  Next, the characteristic extraction unit 24 extracts the characteristic features of the seal shape based on the image data 32 supplied from the image acquisition unit 22 (step S12).

  Next, security is set for the data 34 indicating the characteristic amount specific to the seal detected by the control unit 26 from the feature extraction unit 24 (step S14). Security has an expiration date, for example. The control unit 26 sends the registration data 38 including the security and the unique features of the seal shape to which the expiration date is set to the document management apparatus 14 via the communication unit 28.

  Next, the document management apparatus 14 receives the data 38 as the data 54 and stores the data 64 in the data storage unit 58 via the control unit 56 (step S16). The control unit 56 determines whether the data 62 indicates the registration data 38 or not. When the data 62 indicates the registration data 38, the control unit 56 outputs to the data storage unit 58 as a set of data 64 of the set security and the feature points that are characteristic features inherent to the seal shape. The data storage unit 58 stores the supplied data 64. This storage ends the registration of the seal.

  Next, collation and seal determination procedures in the document management system 10 will be described with reference to FIG. When copying a document, the image acquisition unit 22 in the security determination device 20 acquires image data 30 of a print document including a seal using, for example, an optical scanner, and stores the image data 30 (step S10). Next, local features are extracted from the image data 32 supplied by the feature extraction unit 24 (step S12).

  Next, the search control signal 50 generated by the search control unit 44 is sent to the document management apparatus 14 and collated, and the security of the data 50 obtained from the collation result is acquired (step S18). The search control unit 44 receives the data 34 from the feature extraction unit 24, and receives data 34 via the communication unit 28 so as to collate the similarity between the features of the data 34 and the seal data stored in the document management device 14. A search control signal 50 including 34 is generated and output. In the collation in the document management apparatus 14, the collation unit 60 collates the data indicating the feature amount of the seal data included in the search control signal 50 with the data indicating the feature amount of the seal data from the data storage unit 58. When the collation is matched by the collation unit 60, the document management apparatus 14 searches the data storage unit 58 for security corresponding to the data set indicating the special amount of the seal data as the data 50 via the communication unit 28. Output to the control unit 44. The search control unit 44 sends data 46, which is security information associated with the feature amount with the matching result, to the control unit 42. The security data 46 includes an expiration date.

  Next, the security and timer values are compared (step S20). The control unit 44 compares the received expiration date with the timer value held in the control unit 44, and proceeds to expiration date determination processing (to step S22). If the data 46 whose timer value is obtained by the control unit 44 is greater than the security expiration date, that is, if the security expiration date has passed (YES), the process proceeds to the print document printing permission process (go to step S24). ). If the timer value has not yet expired (NO), the process proceeds to a password request (to step S26). This request improves the management level.

  Next, when permitting printing of the print document, the control unit 42 generates a print permission signal 48 and outputs it to a printer (not shown) (step S24). After this printing is permitted, the determination procedure is terminated. The printer that has received the print permission signal 48 prints the corresponding document. In response to the password request, the control unit 42 sends and displays character information indicating that the password is requested on a display (not shown) (step S26). The user inputs a password in response to this display via a keyboard (not shown) of the security judgment device 20.

  The security determination device 20 determines whether the password is compatible with security (step S28). If the input password matches the password corresponding to security (YES), it is determined that the password has been approved, and the process proceeds to a print document print permission process (to step S24). If the input password does not match the password corresponding to the security (NO), it is determined that the password has been rejected, and the process proceeds to the print document printing prohibition process (to step S30). In the printing document printing prohibition process, the control unit 42 outputs a print prohibition signal 48 to a printer (not shown) (step S30). After this printing prohibition, the determination procedure ends. The printer that has received the print prohibition signal 48 does not print the corresponding document.

  By configuring and operating in this way, a seal image in a document is acquired, treated as search key data, security information for the expiration date on document management is added to this key data, security is set, Register in the document management device 14. In the determination, the registration security of the print document corresponding to the matching of the collation result in the document management apparatus 14 is treated as a security threshold value, and this threshold value is compared with the value of the security determination apparatus 20 to determine whether printing or copying is possible. When the expiration date is set for security, information within the expiration date can be copied, the expiration date of the document can be dynamically changed, and the seal image can be searched. Can be copied, information can be easily reused, and convenience of information sharing can be improved.

  Next, another configuration example of the security judgment device 20 of the document management system 10 will be described with reference to FIG. The common constituent elements are denoted by the same reference numerals and the description thereof is omitted. The security determination device 20 dynamically changes this security by using position information for security. In this embodiment, the copy restriction is set by associating printer management information arranged at each workplace in the company, that is, a printer ID (IDentifwikation) and seal information in the printed document. The security determination device 20 further includes a printer ID storage unit 74 in addition to the components shown in FIG. The printer ID storage unit 74 is a register having a memory function. The printer ID storage unit 74 may use a memory. In the printer ID storage unit 74, the printer ID data 76 is written or read out under the control of the control unit.

  Next, registration, verification, and seal determination procedures according to this configuration will be described with reference to FIGS. The procedure for obtaining and storing the image data 30 in the image obtaining unit 26 in the seal registration device 18 and the procedure for extracting the local feature amount are the same as in the previous embodiment (steps S10 and S12).

  In the present embodiment, the control unit 26 sets, for example, a department name or ID number that can be specified from the seal as management information (step S32). The control unit 26 acquires the data 34 detected by the feature extraction unit 24 together with the document image data, and sets, for example, management information to the data indicating the seal feature amount, and generates a control signal instructing registration. Further, the control unit 26 supplies the document image data 36 to a monitor (not shown). The control unit 26 outputs registration data 38 to the communication unit 28 as a registration signal to which management information is added. The seal registration device 18 outputs data 40 from the communication unit 28 to the document management device 14.

  The control unit 56 in the document management apparatus 14 supplies and stores the feature points indicating the feature values and the management information in association with one set according to the received registration data 62 to the data storage unit 58 (step S34). By this storage, seal data and management information are registered. After this storage, the registration procedure is terminated.

  Next, the collation / determination procedure in the security determination device 20 is shown in FIG. Since the procedure up to the feature point extraction is the same as before, the description is omitted and the operation of the search control unit 44 is described. In the search control unit 44 of FIG. 5, the search control signal 50 is data including data 34 indicating feature points. The search control unit 44 sends the generated search control signal 50 to the document management apparatus 14 for collation and acquires management information of the data 50 obtained from the collation result (step S36).

  Here, the search control unit 44 receives the data 34 from the feature extraction unit 24, and through the communication unit 28 so as to collate the similarity between the features of the data 34 and the seal data stored in the document management device 14. Thus, the search control signal 50 including the data 34 is generated and output. In the collation in the document management apparatus 14, the collation unit 60 collates the data indicating the feature amount of the seal data included in the search control signal 50 with the data indicating the feature amount of the seal data from the data storage unit 58. When the collation is matched in the collation unit 60, the document management apparatus 14 uses the communication unit 28 as management data corresponding to the data set indicating the feature amount of the seal data from the matched data storage unit 58 as the data 50. The data is output to the search control unit 44. The search control unit 44 sends data 46, which is management information associated with the feature amount with which the matching result is matched, to the control unit 42. The security data 46 includes, for example, a printer ID indicating the department name and department ID of the read document.

  Specifically, the management information has items shown in FIG. That is, it includes a registered image 78, feature data 80, department ID 82, security periods 84 and 86, and presence / absence of password 88 and password 90. As described above, the management information is more useful information including the security period 84 and the security level 86. The security level represents the department or personnel level that can handle the document. The management information includes at least one item described above.

  Next, the control unit 42 acquires the management information stored in association with the seal data as data 50, reads the acquired information and the printer ID stored in the printer ID storage unit 74 in advance, and compares them. (Step S38). For example, the control unit 42 compares the department ID of the read document with the department ID included in the printer ID.

  Next, it is determined whether the comparison result matches and the print is approved (step S28). If it is approved (YES), the process proceeds to a print permission process (to step S24). If the comparison result is inconsistent and the result is NO (NO), the process proceeds to a print prohibition process (to step S30).

  In the print permission process, the control unit 42 generates and outputs a control signal 48 for permitting printing or copying of the read document to a printer or copier (not shown), for example (step S24). In the printing prohibition process, the control unit 42 generates and outputs a control signal 48 that prohibits printing or copying of the read document to a printer or a copying machine (not shown), for example (step S30). In this way, after the print permission or print prohibition control, the determination procedure ends.

  Although the embodiment according to the present invention has been illustrated for the case of restricting the copying of a printed document, the present invention is not limited to this. For example, a copy history is traced by associating a seal with the document itself. You can also. In addition, by applying the previous embodiment, it is possible to dynamically change the charge level of copying according to the expiration date of security.

  The expiration date in security is set via the input means and display means, but is not limited to this setting. For example, when a seal including the year, month and date is taken in, the control unit 26 will receive a number. By providing a recognition function, a number included in a seal may be recognized and set as an expiration date. If the expiration date is set to 2 years in advance, the control unit 26 of the seal registration device 18 changes the security period from April 1, 2006 to March 31, 2008, depending on the recognition in fiscal 2006 or 2006. It is also possible to give automatically.

  By configuring and operating in this way, the seal image in the document is used as a search key, and the search key is assigned the workplace name or workplace ID that is the owner of the printed document, and is registered and managed. Even if the features are matched and matched, printing by a device whose management information does not match can be prohibited by comparing the supplied management information. In other words, since printing other than a copying machine or printer owned by the workplace that manages the printed document is prohibited, it is possible to prohibit taking confidential documents out of the department and copying them with a copying machine in another department. In addition, when printing is performed outside the department, for example, if the print history and the user name are stored, the state and the printer when the confidential document is copied in a different place can be managed.

  Therefore, this configuration and its operation manage seal data in association with security data for the document, and can determine the current security based on the security data, thereby enabling flexible document management. Also, according to this configuration and its operation, the visibility is improved for those who understand the meaning of the registered seal, and the design of the document is not impaired for those who do not understand the meaning of the seal. Security on document management can be set according to the level. Further, since it is not necessary to embed a special chip in the document, security can be managed according to the level only by imprinting or printing a seal, which can be implemented at low cost. Furthermore, since it is not necessary to add a barcode or RFID when creating a document, the load at the time of document creation can be reduced as compared with this method of adding.

It is a block diagram which shows the schematic structure in the Example to which the document management system which concerns on this invention is applied. 3 is a flowchart for explaining a procedure for registering a seal in the document management system of FIG. 1. It is a figure which shows the example of the document and seal which the document management system of FIG. 1 handles. 3 is a flowchart for explaining a procedure for checking / determining a seal in the document management system of FIG. 1. It is a block diagram which shows the schematic structure of the other Example in the security determination apparatus in the document management system of FIG. It is a flowchart explaining the procedure of the seal registration in the document management system to which the security determination apparatus of FIG. 5 is applied. 6 is a flowchart for explaining a procedure for checking / determining a seal in a document management system to which the security determination device of FIG. 5 is applied. It is a figure which shows the example of the management information which the document management system to which the security determination apparatus of FIG. 5 is applied handles.

Explanation of symbols

10 Document management system
12 Terminal equipment
14 Document management device
16 IP network
18 Seal registration device
20 Security judgment device

Claims (11)

First image input means for capturing information described in a document as an image;
First feature extraction means for extracting an image of a seal area included in the captured image, obtaining a feature point as feature point data from the extracted image of the seal area, and setting security for the document; A seal registration device including first control means for generating and outputting registration data in which the security is set as one set;
Second image input means for capturing information described in a document requiring determination as an image;
Second feature extraction means for extracting an image of a seal region included in the captured image and obtaining a feature point as feature point data from the extracted image of the seal region;
Search control means for generating and outputting search data that includes the feature point data and requesting search, and second control for determining the security and generating a control signal according to whether printing is possible for the document that requires the determination A security judgment device including means;
Storage means for storing the feature point data and the security as a set;
A collation unit that collates the feature points of the retrieved data and the registered data that has been read, and controls writing to the storage unit in response to the supply of the registration data, and the registration from the storage unit in response to the supply of the search data Read the data, control the collation between the feature points of the search data and the feature points of the read registration data, read the stored security corresponding to the storage means according to the collation match, A document management system comprising a document management device including third control means for outputting to   2. The document management system according to claim 1, wherein the system manages the document that requires the determination by associating the security information with the feature point of the seal.   The document management system according to claim 1, wherein the security information includes at least one of an expiration date, a department, a personnel level, a password presence / absence, and a password.   2. The system according to claim 1, wherein the security determination device includes at least one of an expiration date, a department, a personnel level, a password presence / absence, and a password as information for managing the security, and has means for storing the information. A document management system characterized by that. A first step of setting data of a seal included in information written in a document and security data for the document, generating registration data by combining the seal data and the security data, and registering;
A second step of collating data of a seal included in information described in a document desired to be output with seal data of registered data registered in advance;
A third step of determining whether or not to permit subsequent processing based on the security data of the matched registration data when the matching is made,
The third step is to output a permission control signal according to a determination result to be permitted, and to output a prohibition control signal according to a determination result to be prohibited.   6. The method according to claim 5, wherein the first step captures information described in the document as an image, extracts an image of a seal area included in the captured image, and features from the extracted image of the seal area As a feature point data, setting a security for the document, generating a registration data combining the feature point data and the security, and a fourth step of registering the document management method.   6. The method according to claim 5, wherein in the second step, the information described in the document desired to be output is captured as an image, an image of the seal area included in the captured image is extracted, and the extracted seal area is extracted. A fifth step of obtaining a feature point from the image as feature point data, generating search data including the feature point data and requesting a search, and collating the feature point of the search data with the feature point of the registered data registered A document management method comprising:   6. The method according to claim 5, wherein in the third step, the security data stored in accordance with the corresponding registered data is read out and printed based on the security data when the matching results in matching. A document management method comprising a sixth step of determining whether to permit or not.   6. The document management method according to claim 5, wherein the security data includes at least one of an expiration date, a department, a personnel level, presence / absence of a password, and a password.   6. The document management method according to claim 5, wherein in the third step, charging for the output of the document desired to be output is changed according to the determination based on the security data.   6. The document management method according to claim 5, wherein the copy history is managed by attaching a unique seal to the document in advance.

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