JP2006202026A - Information processor and control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information processor and a control method for reducing capacity of an electronic binder configured with a plurality of electronic documents wherein duplicated font data are embedded in consideration of the fact that font data is larger in data size as compared with text data so that an electronic document (PDF etc. ) embedded with fonts becomes extremely large in size. <P>SOLUTION: This information processor is provided with an archive means for, when archiving a plurality of electronic documents 301 in which fonts can be embedded, automatically detecting font data 306 common to the plurality of electronic document groups, then for organizing the duplicated font data 306 to generate an electronic document archive file. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an information processing apparatus and method, and a computer-readable memory constituting an electronic compressed archive composed of a plurality of types of electronic documents.

  Companies are introducing document management systems to promote document reuse. Early products used to capture paper documents as images with a scanner and register and save them. Recently, however, many electronic documents have been made on personal computers, and they can now be registered and stored.

  Recently, it has become possible to extract an arbitrary page from a plurality of registered electronic documents, compress and archive them, and bind them like a binder to form one electronic document. This is called an electronic binder here. Also, the bound electronic binder can be opened to edit the internal file or change the configuration file.

  Although this electronic binder can include various types of data as materials, PDF (Portable Document Format) of Adobe Corporation can be incorporated as one of the electronic document data.

  By using a PDF file as print data, it is possible to print with almost the same image layout as the application at the time of creation.

  A PDF file has text data and font information, but if the OS environment is different, the font and character code system of the system may be different, and the same display and printing as the creation application may not be realized.

  In order to solve this problem, a part of a font set corresponding to text data is often embedded as a subset in the PDF file included in the electronic binder by each PDF creator.

  When fonts are embedded in a PDF file, the fonts embedded in the OS are not used at the time of display and printing, and the embedded fonts are used. Therefore, the same display and printing as the original document at the time of creation are possible even under different OS environments.

  As a result, it is possible to display PDF files created in different languages and to prevent special characters that exist only in a certain character set from being replaced with other characters.

The electronic binder holds the PDF and other data in a compressed and archived state in order to save the capacity of the storage device and increase the confidentiality of the internal information.
JP 2001-351089 A JP 2002-091957 A

  However, the conventional electronic binder has the following problems.

  When a plurality of PDF files in which fonts are embedded are included in the electronic binder, a plurality of font subsets are embedded in the electronic binder as a whole.

  Since the font data is much larger in data size than text data, the PDF in which the font is embedded is much larger than the PDF having normal text data and font information.

  When text data described in a plurality of PDFs overlaps, the embedded font subsets possessed by each PDF overlap.

  Therefore, there is a problem that the compression efficiency of the PDF electronic document bound to the electronic binder is deteriorated.

  The present invention has been made to solve the above-described problem. When an electronic document that can be embedded with fonts is archived, the duplicated font data is automatically detected after the duplicated font data is automatically detected for each electronic document. Summarize and archive.

  For example, the information processing apparatus of the present invention is an information processing apparatus that creates an electronic document archive file from a plurality of electronic document files in which font data can be embedded, and when archiving the plurality of electronic document files, And an archive means for extracting the font data common to the electronic document file group and creating the electronic document archive file by collecting the common font data.

  According to the present invention, when binding a group of electronic documents (PDF or the like) in which font data is embedded to an electronic binder, instead of archiving as it is, font data that is commonly used is archived together. The capacity of the electronic binder composed of the electronic document including font data is reduced.

Example 1
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a conceptual diagram of an electronic binder according to the present embodiment and an electronic document bound therein.

  An electronic binder 102 is created by archiving a group of electronic documents (PDF documents in this embodiment) embedded with font data. Although there are various compression methods used for compression, the compression used in this embodiment is performed using an unspecified lossless compression algorithm.

  In FIG. 1, the file header 103 has information such as information on the electronic binder itself and creation date and time.

  The compression information table 104 has information regarding the compressed electronic document 105 included in the electronic binder 102. The compression information table has an address of the compressed electronic document 105, and the compressed electronic document 105 is accessed by referring to this address.

  The compressed electronic document 105 is extracted from the electronic binder 102 so that the compressed electronic document 105 bound to the electronic binder 102 can be processed by an application. The compressed electronic document 105 is decompressed using a decompression algorithm corresponding to the compression format used at the time of compression, and the electronic document 106 is created.

  FIG. 2 is a flowchart showing a process of extracting common font data and differential font data from each PDF electronic document, archiving the font data after collecting them when compressing and archiving a PDF electronic document group in which font data is embedded. It is.

  In step 201, the electronic document number i is initialized to 0, and determination is started from the first electronic document.

  In step 202, the font data embedded in the PDF file i is searched to check whether there is a font already registered in the database in steps 203 and 204. If the registered font is embedded in the PDF file i, the process proceeds to step 203. If the embedded font is not embedded up to the PDF file i-1, the process proceeds to step 204.

  In step 203, font data not registered as a common font among the font data embedded in the electronic document i is registered in the database. If there is any other font data not registered as a common font, it is extracted as differential font data of the PDF file i.

  The font data of the PDF file i is created by replacing the font data of the PDF file i with the font data information of the database. Then, the font data is deleted from the PDF file i.

  In step 204, the font data of the PDF file i are all new data, so they are extracted as differential font data. Register as new font data in the database. The font data of the PDF file i is created by replacing the font data of the PDF file i with the font data information of the database. Then, the font data is deleted from the PDF file i.

  In step 205, i is incremented.

  In step 206, it is determined whether or not all electronic documents have been determined based on whether or not the electronic document number i currently being processed is larger than the total file number filenum. If i is smaller than filen, the process proceeds to step 202 to determine the next electronic document. When i is equal to or greater than filenum and all electronic documents have been determined, the process proceeds to step 207.

  In step 207, all electronic documents and font information files are archived to create an electronic binder.

  FIG. 3 is a conceptual diagram showing a process of separating font data and other information from the PDF electronic document and archiving the font data collectively when archiving the PDF electronic document group using the method of the present invention.

  The electronic document 301 is a PDF electronic document. The electronic document 301 includes data 302 other than fonts such as a document, an operator, and an image, and font data 303 and 304. Font data 303 is font data common to other PDF electronic documents. Font data 304 is differential font data unique to each PDF electronic document that is not included in other PDF electronic documents.

  Data 302 other than fonts is extracted from each PDF electronic document and collected as document data 305.

  Also, common font data 303 and differential font data 304 are extracted and collected as font data 306.

  An electronic binder 307 is created by archiving document data, common font data, and differential font data extracted from these PDF electronic documents. Information about each electronic document is recorded in the compression information table of the electronic binder 307 at the time of archiving.

  FIG. 4 shows an example showing processing for extracting common font data and differential font data from font data included in a PDF electronic document.

  Assume that font data is included in the PDF electronic document 401 as shown in the figure. Since the PDF electronic document 401 is the first in the processing order, all font data in the PDF electronic document is registered as new font data. The circle numbers assigned to each character represent the registration number.

  Next, matching is performed using the font data included in the PDF electronic document 402 and the registered font data. If there is font data that is the same as or replaceable with previously registered font data, the font data is registered as common font data. A black circle number assigned to each character indicates a registration number of common font data. Font data that does not match the common font data is registered as new font data. Also, it is registered as differential font data.

  After processing all the target PDF electronic documents, the common font data, the difference font data of each document, and the font information of each document are combined into PDF integrated font information 403 of the electronic binder.

  An information processing apparatus applicable to the document management system according to the embodiment of the present invention described above is shown in FIG. FIG. 5 is a block diagram showing a configuration of an information processing apparatus applicable to the document management system of the present invention.

  In FIG. 5, the CPU 602 executes control of the entire information processing apparatus 501 via the main bus 507, and also inputs an input device 511 (for example, an image scanner, a storage device, a network line) connected to the outside of the information processing apparatus 501. Other information processing apparatuses connected via the telephone line, facsimiles connected via a telephone line, etc.) are controlled via an input I / F (interface) 505. Further, an output device 512 connected to the outside of the information processing device 501 (for example, a printer, a monitor, another information processing device connected through a network line, a facsimile connected through a telephone line, etc.) is output I. Control via / F506. The CPU 502 also inputs an image, performs image processing, color conversion processing, and image according to an instruction input from an input unit (for example, a keyboard 513, a pointing device 514, or a pen 515) via a KBDI / F (keyboard interface) 508. A series of processing such as output control is executed. Further, the display unit 510 that displays image data input from the input device 511 and image data created using the keyboard 513, pointing device 514, and pen 515 is controlled via the video I / F (interface 509).

  The ROM 503 stores various control programs that execute various controls of the CPU 502. In the RAM 504, the CPU 502 loads and executes the OS and other control programs including a control program for realizing the present invention. It also functions as various work areas and temporary save areas used for executing the control program. In addition, a VRAM (not shown) that temporarily holds image data input from the input device 511 and image data created using the keyboard 513, the pointing device 514, and the pen 515 is configured.

  Note that the present invention can be applied to a system (for example, a copier, a facsimile machine, etc.) consisting of a single device even if it is applied to a system composed of a plurality of devices (for example, a host computer, interface device, reader, printer, etc.). You may apply.

  Another object of the present invention is to supply a storage medium storing software program codes for implementing the functions of the above-described embodiments to a system or apparatus, and the computer (or CPU or MPU) of the system or apparatus stores the storage medium. Needless to say, this can also be achieved by reading and executing the program code stored in the.

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

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

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (operating system) operating on the computer based on the instruction of the program code. It goes without saying that a case where the function of the above-described embodiment is realized by performing part or all of the actual processing and the processing is included.

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

  When the present invention is applied to the storage medium, the storage medium stores program codes corresponding to the flowcharts shown in FIGS. 2, 3, and 4 described above.

  As described above, according to the present invention, when a PDF electronic document group in which font data is embedded is bound to an electronic binder, the font data that is commonly used is not archived but archived together. An information processing apparatus and method thereof, and a computer-readable memory can be provided.

  As a result, the capacity of the electronic binder composed of the PDF electronic document including font data is reduced.

It is a conceptual diagram of the document management system of this embodiment. It is the flowchart which showed the process which collects and archives font data. It is a figure which shows the font data extraction process from a PDF electronic document, and the archive process of a font data. It is a figure which shows the internal structural example of an electronic binder, a compression archive process, and an extraction expansion process. It is a block diagram which shows the structure of the information processing apparatus applicable to the document management system of this embodiment.

Claims (7)

An information processing apparatus for creating an electronic document archive file from a plurality of electronic document files in which font data can be embedded,
When archiving the plurality of electronic document files, font data common to the plurality of electronic document file groups is extracted, and the common font data is collected to create the electronic document archive file. A characteristic information processing apparatus.   The information processing apparatus according to claim 1, wherein the electronic document file in which the font data can be embedded is an electronic document file in a PDF format. Information acquisition means for acquiring the electronic document file information stored in the electronic document archive file when a read request for electronic document file information stored therein is issued to the electronic document archive file;
The information processing apparatus according to claim 1, further comprising: a restoration unit that restores the original electronic document file based on the acquired electronic document file information according to a predetermined restoration algorithm.   The said information acquisition means acquires the information regarding the electronic document file stored in the said electronic document archive file, without performing the said restoration means from this electronic document archive file. Information processing device.   The information processing apparatus according to claim 1, wherein the archive unit compresses the electronic document file with a predetermined compression algorithm. A control method for controlling an information processing apparatus that creates an electronic document archive file from a plurality of electronic document files in which font data can be embedded,
When archiving the plurality of electronic document files, the method includes an archiving step of extracting font data common to the plurality of electronic document file groups and collecting the common font data to create the electronic document archive file. An information processing apparatus control method. A computer program for creating an electronic document archive file from a plurality of electronic document files in which font data can be embedded,
When archiving the plurality of electronic document files, the computer executes an archiving step of extracting font data common to the plurality of electronic document file groups and creating the electronic document archive file by collecting the common font data A computer program comprising a program code for causing a program to be executed.

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