JP2019144853A - Information processing device for performing paint-out processing, control method thereof, and program - Google Patents

Abstract

To present a character string having a same pattern as a character string pattern specified by a user as an object to be paint-out in a document as a candidate character string to be paint-out processed.SOLUTION: An Information processing device, which performs paint-out processing, includes reception means for receiving, from a user, designation of a character string to be paint-out processed in an electronic document; acquisition means for acquiring, from the electronic document, a character string candidate having a same pattern as the character string received by the reception means; and display control means for displaying, on a display means, a screen for inquiring whether the character string candidate is to be paint-out processed.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a technique for performing redaction processing on an electronic document.

  An electronic document editing application has a function called “redaction” for deleting confidential information from an electronic document such as PDF (Portable Document Format). FIG. 1 is a diagram illustrating the redaction process. FIG. 1 shows a PDF page 101. In the page 101, character objects 102 to 104 are included. When the user designates the character object 104 to be redone and instructs execution of redaction, a page 110 is displayed. On the page 110, the area of the designated character object 104 is filled with a redaction area 105. Information that overlaps the redaction area is completely deleted from the PDF and cannot be restored. All objects such as characters, images and graphics can be deleted by redaction. Even when a plurality of objects overlap in the designated redaction area, all the objects existing in the redaction area are deleted or filled.

  Non-Patent Document 1 describes the redaction process of Adobe Acrobat (registered trademark), which is PDF editing software provided by Adobe Systems. Non-Patent Document 1 describes a function that collectively erases character strings having the same predetermined pattern. Specifically, the character strings corresponding to the pattern selected by the user from a predetermined pattern (phone number, credit card number, e-mail address, social security number, date, etc.) are collectively erased. be able to. For example, when a user redacts the pattern “phone number” from a document, it is possible to search for a combination character string of a phone number and a guessed number in the document, and to redact all of them. . With this function, the user can save, for example, the trouble of “deleting by specifying the character strings to be erased that exist in a plurality of places in the document”.

“Removing sensitive content from PDFs”, [online], June 6, 2017, Adobe Systems Incorporated, [Search January 6, 2018], Internet (URL: https://helpx.adobe.com/acrobat/using /removing-sensitive-content-pdfs.html)

  However, according to the method described in Non-Patent Document 1, only a character string that matches a character string pattern registered in advance is detected as a character string to be redacted. Therefore, a pattern that is not registered cannot be detected as a character string that is a candidate for redaction. For this reason, for example, a character string having a pattern similar to the character string pattern arbitrarily designated in the document by the user as a redaction target cannot be presented as a candidate character string to be redacted.

  An information processing apparatus according to an aspect of the present invention is an information processing apparatus that performs redaction processing, and includes: a receiving unit that receives designation of a character string to be redone in an electronic document from a user; and An acquisition unit that acquires a character string candidate having a pattern similar to the character string received from the electronic document, and a screen that inquires whether the character string candidate is to be redone is displayed on the display unit. And a display control means.

  According to the present invention, it is possible to present a character string having a pattern similar to the pattern of the character string designated as a redaction target by the user in the document as a candidate character string to be redacted.

The figure explaining redaction. The figure which shows the system example. The figure which shows the hardware constitutions of PC. The flowchart which shows a process. An example of a dialog. An example of a PDF file page. An example of a PDF file page after redaction.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The following embodiments do not limit the invention according to the claims, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention.

<< Embodiment 1 >>
<System configuration>
FIG. 2 is a diagram showing the overall configuration of a system for managing electronic documents in the present embodiment. The system 200 includes a PC (Personal Computer) 201 as an information processing apparatus and a file server 202 as data storage, and is connected to each other via a network 203 such as a LAN. An electronic document editor 210 is installed in the PC 201 as an application that can edit an electronic document. A user can create, edit, and print an electronic document in a predetermined format using the electronic document editor 210. Hereinafter, an electronic document in PDF format (hereinafter referred to as “PDF document”) will be described as an example. However, the electronic document is not limited to a PDF document. Any type of electronic document may be used as long as the redaction process can be applied.

  The electronic document editor 210 includes a library module 211 and a UI (User Interface) control module 212. The UI control module 212 and the library module 211 are software components. The library module 211 is a component that performs processing such as generation / editing of a PDF document. The UI control module 212 functions as a display control unit that generates and displays a user interface (UI) screen when a user generates or edits a PDF document. Further, the UI control module 212 functions as a reception unit that receives a user operation via the UI screen. The PDF document generated or edited by the electronic document editor 210 is stored in the local file system of the PC 201 or the file server 202. The PC 201 communicates with the file server 202 via the network 203.

<Hardware configuration>
FIG. 3 is a diagram illustrating an example of a hardware configuration of the PC 201. The PC 201 includes a CPU 301, a memory 302, an input / output interface 303, a network interface 304, a display interface 305, a mass storage device 306, and a system bus 307.

  The CPU 301 implements various processes such as generation or editing of a PDF document by the electronic document editor 210 by operating a predetermined computer program stored in a mass storage device 306 such as an HDD. The memory 302 functions as a main memory and a work area for the CPU 301. The input / output interface 303 is an interface that connects an input device 310 such as a mouse and a keyboard and an external memory 311 such as a memory card and the system bus 307. The network interface 304 is an interface that controls communication with the file server 202 via the network 203. The PC 201 can bidirectionally communicate with the file server 202 and other external devices (for example, a printer) via the network interface 304. The display interface 305 is an interface that controls display on the display device 312. A touch panel display in which the display device 312 and the input device 310 are integrated may be used.

<Flowchart>
FIG. 4 is a diagram showing a flowchart of the present embodiment. Hereinafter, the processing of this embodiment will be described with reference to a flowchart. 4 is realized by the CPU 301 functioning as the electronic document editor 210 by executing a program read by the CPU 301 into the memory 302. The process of FIG. 4 is started in a state where the PDF document is read by the electronic document editor 210, the document screen is displayed on the display device 312 and the mode for performing the redaction process is designated.

  In step S <b> 401, the UI control module 212 of the electronic document editor 210 accepts designation of a character string to be redone (hereinafter referred to as “character string A” for explanation) from the input device 310. The user uses the input device 310 to specify a character string to be redone on the document screen displayed on the display device 312. For example, the user may specify a character string to be redone in the electronic document displayed on the document screen by swiping with a finger or by specifying a range using a mouse cursor. Also good. In addition, when a predetermined character block is already recognized as a character string in the electronic document editor 210, a part of a predetermined area including the character string (for example, an arbitrary character included in the character string) is designated. The character string of the predetermined character block may be designated. A character string can be specified by any other method. Prior to step S401, a message that prompts the user to specify a character string to be redone may be displayed on the display device 312.

In step S402, the library module 211 of the electronic document editor 210 analyzes the pattern of the character string A designated in step S401. The character string pattern is a pattern classified according to, for example, a character type or the number of digits. Specific examples include the following.
・ Character string pattern (phone number, etc.) consisting of 10 numbers and 3 “-” characters
-Character string pattern consisting of only alphanumeric characters and alphabets (ID number, etc.)
-Character string pattern (money) consisting of numbers, currency symbol characters, and ","
-Character string pattern (address) containing multiple characters of prefectures, municipalities, groups, and wards
The above is an example, and the present invention is not limited to this. It is only necessary to obtain the pattern of the designated character string A.

  Next, in step S <b> 403, the library module 211 acquires a character string in the vicinity region of the character string A (hereinafter referred to as “character string B”). Note that all character string groups (for example, the upper, lower, left, and right character strings of the character string A) included in the vicinity region may be the character strings B, but here, for the sake of simplicity of description, the character string B Is assumed to be in the vicinity of the left side of the character string A. Here, it is assumed that the character string is composed of one or more characters and has been recognized in advance in the electronic document editor 210. When the number of characters in the character string B is greater than the predetermined number, a predetermined number of characters may be acquired as the character string B from the side adjacent to the character string A.

  The reason for acquiring the character string B in the vicinity of the character string A to be redone is that the character string B is estimated to be a character string having a high degree of association with the character string A. For example, when the character string A is a telephone number, a character string representing the telephone number (a character string pattern made up of 10 numerals and three “−” characters) is isolated in the PDF document independently. It is unlikely to appear. Rather, in order to indicate that the character string A is a telephone number, there is a high possibility that a character string such as “telephone number” appears in the character string in the vicinity of the character string A (character string B). By acquiring a string that has a high degree of association with the character string to be redacted in this way, when the user determines an additional area to be redone, the user can Thus, it is possible to easily determine whether or not to be redacted. Details will be described later. In addition, you may employ | adopt the form which does not perform the process of step S403. In other words, the character string B may not be acquired.

  Next, in step S404, the library module 211 determines whether there is a character string having the same pattern as the pattern analyzed in step S402 in the character string in the PDF document. That is, the library module 211 determines whether there is a character string having the same pattern as the character string A in the character string in the PDF document. For example, if the pattern analyzed in step S402 is a telephone number, it is determined whether there is a character string pattern composed of 10 numerals and three “-” characters in the PDF document. Hereinafter, a character string having the same pattern as the character string A existing in the PDF document is referred to as “character string C”. In step S404, determination processing is performed on all character strings in the PDF document. As a result, there may be a plurality of character strings C to be detected. As described above, in this embodiment, a process of analyzing a character string pattern designated as a character string to be redone by the user and detecting a character string that matches the analysis result is performed. If there is a character string C, the process proceeds to step S405; otherwise, the process proceeds to step S410.

  In step S405, the library module 211 determines the character string C as a character string candidate to be redacted. When there are a plurality of character strings C, all the character strings C are determined as candidate character strings to be redacted.

  In step S <b> 406, the library module 211 acquires a character string in the vicinity of the character string C (hereinafter referred to as “character string D”). The library module 211 may acquire all character string groups (character strings on the upper, lower, left, and right sides of the character string C) included in the vicinity area of the character string C as the character string D. For the sake of simplicity, it is assumed that the character string D is near the left. Note that, in response to the acquisition of the character string near the left in step S403, the character string near the left may or may not be acquired in step S406. The directions of the neighboring character strings acquired in step S405 and step S406 need not be linked. The character string D may be referred to as a second character string.

  The reason for acquiring not only the character string C but also the character string D will be described. The reason why the character string D near the character string C having the same pattern as the character string A is acquired is that the character string D is estimated to be a character string having a high degree of association with the character string C. For example, the character string D may be a character string that describes the character string C. For this reason, as will be described later, by displaying the character string C and the character string D together on the screen, the user can easily understand what meaning the character string C is. it can. Details will be described in step S407 below.

  In step S407, the library module 211 displays a UI screen for allowing the user to check whether the character string C that is the character string candidate to be redacted determined in step S405 is the character string to be redacted. 212 is displayed. At this time, the UI control module 212 displays the character string C and the character string D in association with each other on the display device 312. In addition, a message for causing the user to select a region to be redacted is displayed. This will be described using a specific example.

  FIG. 5 is a diagram illustrating an example of the dialog 501 displayed on the display device 312 in step S407. Here, an example is shown in which the pattern of the character string to be erased designated in step S401 is a 12-digit numeric character string. In the dialog 501, a message 502 including that there is a character string having the same character string pattern as the character string designated as the region to be redone, and prompting the user to select a character string to be redone among the character strings. It is displayed. The example of FIG. 5 shows a case where a plurality of character string candidates (character string C) to be erased are detected in the PDF document. Region 503 and region 504 include character string candidates to be redone and character strings in the vicinity of the character string candidates.

  As shown in FIG. 5, a character string candidate (character string C) to be redone and a character string (character string D) in the vicinity thereof are displayed together. Thereby, the user can easily confirm whether or not the character string C is a character string to be redone by referring to the character string D. In FIG. 5, different types of character strings “form ID” and “personal number” are extracted as character string candidates (character string C) to be redone as 12-digit number character strings. When only the character string C is displayed in the dialog 501, the user may not be able to determine whether the character string candidate (character string C) to be redacted can be treated as the target to be redacted. In the present embodiment, the character string candidate (character string D) in the vicinity of the character string candidate to be redacted (character string C) is also displayed in the dialog 501 so that the user can select the character string candidate to be redacted (character string D). It can be easily determined whether or not the character string C) should be redacted.

  When the user checks the check box of the character string C to be redone in FIG. 5 and presses the OK button 505, the checked character string C is determined as a redaction process target. If the OK button 505 is pressed in a state where nothing is checked in the check box, only the character string A designated in step S401 is determined as a redaction process target. When the cancel button 506 is pressed, the process is terminated without performing the redaction process.

  Note that the UI control module 212 can display the dialog 501 on the display device 312 in such a manner that the user can confirm whether or not the character string D in the vicinity of each character string C is the same as the character string B. It is. That is, in the check box in the dialog 501, the setting using the character string B acquired in step S403 may be performed in advance.

  For example, the character string B acquired in step S403 (sometimes referred to as a third character string) is compared with the character string D, and the character string C corresponding to the matched character string D is checked in advance. A dialog 501 may be displayed. For example, it is assumed that the character string B acquired in step S403 is “personal number”. At this time, in the example of FIG. 5, a check box is not checked in the area 503, and a dialog 501 in which the check box is checked in advance is displayed in the area 504. By using such a UI, it is possible to save the user from inputting a check into the check box.

  Note that the example of FIG. 5 is not limited to this example in which the character string candidate (character string C) to be redone is checked when it is checked. Conversely, when the character string candidate (character string C) to be redacted is checked, a message not to be redacted is displayed, and the character string C that is not checked is determined as the character string to be redacted. May be.

  Returning to the flowchart of FIG. In step S <b> 408, the library module 211 determines whether the user has selected that the character string C is to be redacted. In the example of FIG. 5, the determination can be made based on whether or not there is a character string C whose check box is checked. If it is determined that the character string C is also a redaction target, the process proceeds to step S409. If it is determined that the character string C is not a redaction target, the process proceeds to step S410.

  In step S409, the library module 211 performs redaction processing on the character string C selected as the object to be redone in addition to the character string A specified in step S401. Then, the process ends. On the other hand, in step S410, the library module 211 performs redaction processing on the character string A designated in step S401. Then, the process ends.

<Specific example>
A description will be given with a specific example. FIG. 6 is a diagram showing a page 600 of a PDF document to be redone using the electronic document editor 210. FIG. 6A shows an example of a page 600 displayed on the display device 312. FIG. 6B shows the same page 600 as FIG. 6A, but the character string detected by the processing shown in FIG. 4 is surrounded by a dotted rectangle and visualized. Although the dotted line rectangle is handled as not being displayed on the display device 312, the dotted line rectangle may be displayed on the display device 312.

  It is assumed that the user designates the character string “3455689091234” in the area 601 as a character string to be erased. This character string corresponds to the character string A in the above description (see step S401). Next, the electronic document editor 210 analyzes the pattern of the character string A. In this example, it is analyzed that the character string is composed of 12 numbers (see step S402). Next, the electronic document editor 210 searches for a character string B near the character string A. For simplification of explanation, the left neighboring region is searched. In this example, the character string “personal number” in the area 602 becomes the character string B (see step S403).

  Next, the electronic document editor 210 determines whether or not the same character string pattern as the character string A, that is, “a character string composed of 12 numbers” is present in the page 600 of the PDF document. In this example, the character string “0001567788353” in the area 603 and the character string “12343212456” in the area 604 are detected as having the same pattern as the character string A. That is, these two character strings become the character string C (see steps S404 and S405).

  Next, the character string D in the vicinity region of the character string C is searched. In this example, the character string D for the character string C in the area 603 is the character string “form ID” in the area 605. Further, the character string D corresponding to the character string C in the area 604 becomes the character string “personal number” in the area 606 (see step S406).

  Next, a UI (for example, FIG. 5) for confirming to the user whether or not the character string C is an object to be erased is displayed (step S407). In this example, two character strings corresponding to the character string C (character strings in the region 603 and the region 604) and character strings corresponding to the respective character strings D (the region 605 and the region 606) are the regions 503 in FIG. And an area 504 are displayed. A check box is provided for the user to select whether or not to redact the object. If the character string B (in this example, “personal number”) matches the character string D, the corresponding check box is pre-checked for redaction. When the OK button 505 is pressed with at least one check box to be redacted, the redaction process is performed on the character string A and the character string C designated as the object to be redone with the check box. Is performed (see steps S408 and S409). When the OK button 505 is pressed with no check marks, the redaction process is performed on the character string A (see step S410). When the cancel button 506 is pressed, the process ends without performing the redaction process.

  FIG. 7 shows an example of the result of executing the redaction process on the area 601 designated as the area to be redone by the user and the area 604 selected through the dialog 501. 6 and 7, the example in which the PDF document has one page has been described. However, the present invention can also be applied to a PDF document extending over a plurality of pages. In the case of a PDF document extending over a plurality of pages, it is possible to further save the user.

  As described above, the user can specify the redaction process for the character string regions having the same character string pattern without any trouble by simply specifying one character string region.

  As described above, in the present embodiment, a character string having the same pattern as the character string designated as a redaction target by the user is searched. Then, it presents to the user whether the retrieved character string is also subject to redaction processing. For this reason, for example, when a user tries to redact a character string of a certain pattern, even if there is a character string for which the specification of redaction processing is omitted, whether the character string is to be redacted. User can confirm. In addition, since it is not necessary to register a pattern in advance, it can be applied to character strings of various patterns. Further, by displaying the character string C and the character string D together, it is easy for the user to easily determine whether or not to use the character string to be redacted. Furthermore, the character string C corresponding to the character string D that matches the character string B is displayed with information indicating that it is a strong candidate for the redaction process, so that the user can select the character string to be redacted. The time and effort to specify can be saved.

<< Other Embodiments >>
In the above-described embodiment, an example has been described in which the character string A and the character string C are collectively subjected to the redaction process. However, the present invention is not limited to this example. Alternatively, the character string A may be redone first, and then the character string C may be presented to inquire whether the character string C is to be redone.

  The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in the computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

Claims (10)

An information processing apparatus that performs redaction processing,
Accepting means for accepting designation of a character string to be redone in an electronic document from a user;
Obtaining means for obtaining from the electronic document a character string candidate having the same pattern as the character string accepted by the accepting means;
An information processing apparatus comprising: a display control unit that causes a display unit to display a screen for inquiring whether to perform the redaction process on the character string candidate. The acquisition means further acquires a second character string that is a character string in the vicinity of the character string candidate,
The information processing apparatus according to claim 1, wherein the display control unit displays the character string candidate and the second character string in association with each other on the screen.   The information processing apparatus according to claim 2, wherein the reception unit further receives a selection of a character string candidate for performing the redaction process among the character string candidates displayed on the screen. The acquisition unit further acquires a third character string that is a character string in the vicinity of the character string received by the reception unit,
The display control unit causes the display unit to display a screen in a state where a character string candidate associated with the second character string that matches the third character string is selected in advance among the character string candidates. The information processing apparatus according to claim 3.   The screen includes a message for inquiring of the user whether to perform the redaction process on the character string candidate, in addition to the character string accepted by the accepting unit. 5. The information processing apparatus according to any one of 4.   The information processing apparatus according to claim 1, wherein the pattern is determined according to at least one of a character type and a digit number. The display control means causes the display means to display the electronic document,
2. The receiving unit receives a designation of a character string to be redone, by accepting designation of a character string area in the electronic document displayed on the display unit. The information processing apparatus according to any one of claims 1 to 6.   8. The processing device according to claim 1, further comprising processing means for performing the redaction process on the character string received by the receiving means and the character string candidate displayed and selected on the screen. The information processing apparatus according to any one of claims. A method of controlling an information processing apparatus that performs redaction processing,
Receiving from the user the designation of a character string to be redone in the electronic document;
Obtaining a character string candidate having the same pattern as the character string accepted from the designation from within the electronic document;
And a step of causing a display unit to display a screen for inquiring whether or not to perform the redaction process on the character string candidate.   The program for functioning a computer as each means of the information processing apparatus as described in any one of Claim 1 to 8.

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