JP4375182B2 - Document image display device, control method for document image display device, program, and document image data - Google Patents

Description

  The present invention relates to a document image display device, a control method for the document image display device, a program, and document image data.

  The document image data may include many image elements having different properties such as a character (text) portion and a natural image portion (pattern portion). Due to the difference in properties of these image elements, it may be preferable to perform different image processing for each image element, for example, compression by a different method is suitable for compression processing. For this reason, document image data is configured to include image element data generated separately for each image element included in the document image.

By the way, as a display method of image data, progressive display of image data subjected to JPEG (Joint Picture Experts Group) compression processing is known (Patent Document 1). According to this display method, it is possible to allow the user to grasp the entire image even before the image is completely displayed.
JP-A-10-108180

  For document image data that includes image element data generated separately for each image element included in the document image, the document image is not completely displayed as in the above image data display method. It is desired that the user can grasp the whole picture.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide document image data that includes image element data generated separately for each image element included in the document image. Is to provide a document image display apparatus, a control method for the document image display apparatus, a program, and document image data that enable a user to grasp the entire image before the image is completely displayed.

  In order to solve the above-described problems, a document image display device according to the present invention includes image data representing image data and generated separately for each image element included in the document image. Image data acquisition means for acquiring the document image data to be displayed, and an image based on each image element data included in the document image data is displayed on the display means in an order based on the area of each image element in the document image In this way, it includes a document image display control means for displaying the document image on the display means.

  The document image display device control method according to the present invention is a document configured to include image element data generated separately for each image element included in the document image, the image data representing the document image. A document image data acquisition step for acquiring image data, and an image based on each image element data included in the document image data is displayed on the display means in an order based on an area related to each image element in the document image. And a document image display control step for displaying the document image on the display means.

  The program according to the present invention is a program for causing a computer such as a personal computer to function as a document image display device, and is image data representing a document image, and each image element included in the document image. Document image data acquisition means for acquiring document image data including image element data generated separately, and an image based on each image element data included in the document image data, A program that causes the computer to function as a document image display control unit that causes the display unit to display the document image in such a manner that the display unit displays the document image in an order based on the area of the image element.

  According to the present invention, image data representing a document image, and document image data including image element data generated separately for each image element included in the document image is acquired. Then, the image based on each image element data included in the document image data is displayed on the display means such that the image is displayed on the display means in the order based on the area related to each image element in the document image. The For this reason, the user can grasp the whole image of the document image data including the image element data generated separately for each image element included in the document image before the document image is completely displayed. You will be able to plan.

  In one aspect of the present invention, the document image data includes position specifying information for specifying a display position of each image element in the document image, and the document image display control means is included in the document image data. The order in which the display unit displays an image based on each image element data to be displayed is determined based on position specifying information included in the document image data.

  In one aspect of the present invention, the document image data includes display order information indicating a display order of each image element data determined based on an area related to each image element in the document image, and the document image The display control means causes the display means to display an image based on each image element data included in the document image data in an order based on display order information included in the document image data.

  The document image data according to the present invention is image data representing a document image, and the image element data generated separately for each image element included in the document image is related to each image element in the document image. This is document image data including an order based on area.

  The document image data according to the present invention is image data representing a document image, the image element data generated separately for each image element included in the document image, and each image element in the document image. Document image data including display order information indicating the display order of each image element data determined based on the area.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of the invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing an overall configuration of a document image display apparatus according to the present embodiment. The document image display device 10 is configured by a computer such as a personal computer, for example, and includes a control unit 11, a storage unit 12, a display unit 13, and an input unit 14, as shown in the figure.

  The control unit 11 operates in accordance with a program stored in the storage unit 12 and executes a process of displaying, for example, document data having a plurality of pages on the display unit 13.

  The storage unit 12 is realized by a computer-readable information storage medium and a device (for example, a hard disk device or a memory device) that writes data to the information storage medium or reads data from the information storage medium. The storage unit 12 stores a program executed by the control unit 11. The storage unit 12 also operates as a work memory that stores various data required in the process of the control unit 11.

  The display unit 13 is realized by a display device, for example, and displays an image according to an instruction input from the control unit 11. The input unit 14 is realized by an input device such as a mouse or a keyboard, for example, and receives a user operation.

  In document image display apparatus 10 according to the present exemplary embodiment, a document display program for displaying document data including a plurality of pages is executed.

  Here, document data that is a target of the document display program will be described.

  Document data handled by the document display program is document data composed of a plurality of pages, and includes image data for each page (image data representing an image of each page).

  FIG. 2 shows an example of an image (document image) of each page of document data. As shown in the figure, the image of each page of the document data can include image elements such as a character portion 20, a line drawing portion 21, and a photograph portion 22. Since these image elements have different properties, it is often preferable to perform different image processing for each image element, for example, compression in a different method is suitable for compression processing. For this reason, in the document data that is the target of the document display program, the image data for each page is generated separately for each image element included in the page (that is, each image included in the image of the page). It is configured as a set (image element data group) of image element data corresponding to elements.

  Specifically, for example, as shown in FIG. 3, image data (document image data) of each page includes image element data 30 representing the character portion 20 (hereinafter referred to as character layer data 30) and a line drawing portion 21. Including at least one of image element data 31 (hereinafter referred to as line drawing layer data 31) and image element data 32 (hereinafter referred to as photo layer data 32) representing the photograph portion 22. The image data is in a hierarchical structure format.

  These character layer data 30, line drawing layer data 31, and photograph layer data 32 are compressed by a compression method corresponding to the attribute (characteristic) of the image element. For example, the character layer data 30 for displaying the character portion 20 is image data compressed by a binary compression method (for example, a compression method such as G4, JBIG, and JBIG2) suitable for the image element. . Further, the line drawing layer data 31 for displaying the line drawing portion 21 and the photo layer data 32 for displaying the photographic portion 22 are compressed by a multi-value compression method (for example, JPEG, JPEG 2000 or the like) suitable for the image element. The image data is compressed by the method.

  The document image data includes background image data representing the background portion of the document image in addition to the above layer data. Further, coordinate information of a circumscribed rectangle of each image element (information for specifying the display position of each image element in the document image) is included.

  Next, a screen displayed by the document display program will be described.

  FIG. 4 shows an example of a page list screen displayed by the document display program. This page list display screen is displayed when a document display program is started and document data to be displayed is specified. As shown in the figure, a page icon 40 and a cursor 41 are displayed on the page list screen.

  The page icon 40 corresponds to each page of document data. On this page list screen, only the largest area among the image elements included in each page is displayed as the page icon 40. For example, in the case of the page shown in FIG. 2, an image (thumbnail image) based on the photographic part 22, that is, the photographic layer data 32 is displayed as the page icon 40. In the page list screen, page icons 40 may be displayed for all pages, or page icons 40 may be displayed for some pages.

  The cursor 41 moves on the screen according to an operation on the mouse (input unit 14). On the page list screen, when the user moves the cursor 41 over the desired page icon 40 and clicks the mouse (that is, when the desired page icon 40 is clicked), a page reference screen is displayed and corresponds to the page icon 40. The image of the page to be displayed is displayed.

  FIG. 5 shows an example of a page reference screen displayed by the document display program. As shown in the figure, the page reference screen includes a document image display area 51, a cursor 51, a previous button 52, a next button 53, and a page list button 54.

  In the document image display area 50, an image (document image) of each page of the document data is displayed. The cursor 51 moves on the screen in response to an operation on the mouse (input unit 14). In this page reference screen, when the user moves the cursor 51 over the document display area 50 and clicks the mouse (that is, when the user clicks the document display area 50), the image of the page next to the currently displayed page is displayed in the document display. It is displayed in the area 50. Similarly, when the user clicks the next button 53, the image of the next page is displayed in the document display area 50. When the user clicks the previous button 52, the image of the page before the currently displayed page is displayed in the document display area 50. When the user clicks the page list button 54, a page list screen (FIG. 4) is displayed.

  In this page reference screen, when the image of the display target page is displayed in the document image display area 50, the image elements are displayed in descending order of the areas related to the image elements. That is, it is displayed in order from the largest area. For example, in the case of FIG. 5 (when the image of the page shown in FIG. 2 is displayed), the photograph part 57 is displayed first, then the line drawing part 56 is displayed, and finally the line part 56 is displayed. A character portion 55 is displayed. For this reason, even before the document image is completely displayed, the user can grasp the characteristics of the display target page. Hereinafter, the configuration related to this point will be described in detail.

  FIG. 6 mainly shows functional blocks realized in the document image display apparatus 10 that are related to the present invention. As shown in the figure, the document image display device 10 includes a document image data acquisition unit 60, a display control unit 61, and a display unit 62. These functions are realized by the control unit 11 executing a program supplied by a computer-readable information storage medium or a communication network.

[1. Document image data acquisition unit]
The document image data acquisition unit 60 acquires document image data configured as described with reference to FIG. 3 as image data representing a document image. For example, when the document image data is stored in the storage unit 12 (such as a hard disk device), the document image data acquisition unit 60 reads the document image data from the storage unit 12. Further, for example, when document image data is stored in a document management apparatus that can communicate with the document image display apparatus 10, the document image data stored in the document management apparatus is acquired. For example, the document image data acquisition unit 60 transmits a document image data distribution request (document data distribution request) to the document management apparatus, and receives document image data (document data) transmitted from the document management apparatus in response to the document data acquisition request. ).

  Specifically, the document image data acquisition unit 60 displays the document image display area 50, the previous button 52, the next button when the page icon 40 is clicked on the page list screen (FIG. 4), or on the page reference screen (FIG. 5). When the button 53 is clicked, image data (document image data) of a page to be displayed in the document display area 50 is acquired.

[2. Document image display control unit]
The display control unit 61 causes the display unit 62 to display a document image based on the document image data acquired by the document image data acquisition unit 60. In particular, the display control unit 61 displays the document image by causing the display unit 62 to display an image based on each image element data included in the document image data in an order based on the area related to each image element in the document image. This is displayed on the unit 62.

  For example, the display control unit 61 determines the order in which the image based on the image element data included in the document image data is displayed on the display unit 62 based on the coordinate information (position specifying information) of the circumscribed rectangle of each image element. You may do it. Such coordinate information is included in the document image data.

  Specifically, the display control unit 61 reads out coordinate information of a circumscribed rectangle of each image element from the document image data. Then, the area of the circumscribed rectangle is calculated for each image element. Then, based on the area calculated for each image element, an order (display order) in which an image based on each image element data is displayed on the display unit 62 is determined. For example, the display order is determined so that the calculated areas are displayed in order from the largest image element. Note that the number of actual pixels included in the circumscribed rectangle may be calculated for each image element, and the display order may be determined based on the number of actual pixels calculated for each image element. For example, the display order may be determined such that the calculated image elements are displayed in order starting from the largest number of actual pixels.

  After determining the display order of the image element data, the display control unit 61 causes the display unit 62 to display an image based on each image element data according to the display order. Specifically, the process is performed as follows. In the following description, it is assumed that the display order of the image element data is determined as photographic layer data 32, line drawing layer data 31, and character layer data 30.

  The display control unit 61 first reads background image data from the document image data, and generates background image data. Next, the display control unit 61 extracts the photo layer data 32 from the document image data and decompresses it, and decompresses the photo layer data 32 to a corresponding position on the background image data based on the coordinate information of the circumscribed rectangle of the photo part 22. Image data overwritten with image data is generated. Then, the display control unit 61 causes the display unit 62 to display this image data.

  Here, when the photograph part 22 includes a plurality of objects (object areas), the display control unit 61 causes the display unit 62 to display each object (each object area) in the display order based on the coordinate information of the object area. You may do it. For example, the reference coordinate value (for example, the upper left coordinate value) of the circumscribed rectangle of each object may be acquired, and each object may be displayed on the display unit 62 in ascending order of the reference coordinate value. Further, for example, the area of the circumscribed rectangle of each object may be acquired, and the objects may be displayed on the display unit 62 in the descending order of the area. The same applies to the case where an image based on the line drawing layer data 31 or an image based on the character layer data 30 is displayed.

  Next, the display control unit 61 extracts the line drawing layer data 31 from the document image data and expands the line drawing layer data 31 to the corresponding position on the generated image data based on the coordinate information of the circumscribed rectangle of the line drawing portion 21. The image data is generated by overwriting the processed image data. Then, the display control unit 61 causes the display unit 62 to display the overwritten image data.

  Next, the display control unit 61 extracts the character layer data 30 from the document image data and expands it, and expands the character layer data 30 to the corresponding position on the generated image data based on the coordinate information of the circumscribed rectangle of the character part 20. The image data is generated by overwriting the processed image data. Then, the display control unit 61 causes the display unit 62 to display the overwritten image data. Thus, the document image is displayed on the display unit 62.

  Note that the processing in the display control unit 61 may be more easily realized by making the data structure of the document data as shown in FIGS. 7 and 8, for example. 7 and 8 show an example of document image data of a document image having a large area in the order of the photograph part 22, the line drawing part 21, and the character part 20, as shown in FIG.

  For example, as shown in FIG. 7, image element data generated separately for each image element included in the document image is included in an order based on the area of each image element in the document image, thereby configuring the document image data. You may make it do. The header data includes, for example, coordinate information of a circumscribed rectangle of each image element.

  In this case, the display control unit 61 extracts the header data, the background image data, and each image element data in order from the top of the document image data, and causes the display unit 62 to display an image based on the image element data. do it. In this way, the display control unit 61 does not need to determine the display order of the image element data, and the processing load on the display control unit 61 can be reduced.

  Further, for example, as shown in FIG. 8, image element data generated separately for each image element included in the document image and each image element data determined based on the area related to each image element in the document image. The document image data may be configured by including display order information indicating the display order. In this case, the header data may include the display order information as shown in FIG. 9, for example, together with the coordinate information of the circumscribed rectangle of each image element. As shown in the figure, this display order information is information in which the display order is associated with the reading start position of the image element data. As described above, the display order information may be obtained by associating information indicating the display order with information for specifying image element data to be read in the order.

  In this case, the display control unit 61 first extracts header data from the document image data, and reads display order information therefrom. After the background image data is read, the image element data is read from a predetermined reading start position in the order determined by the display order information, and an image based on the image element data is displayed on the display unit 62. What should I do? In this way, the display control unit 61 does not need to determine the display order of the image element data, and the processing load on the display control unit 61 can be reduced.

  As described above, when displaying the document image, the document image display device 10 displays the image elements included in the document image in order from the image element having a relatively large area. For this reason, even before the document image is completely displayed, the user can grasp the overall characteristics of the document image.

  The present invention is not limited to the embodiment described above.

  For example, the present invention is not limited to document data consisting of a plurality of pages (document images). The present invention targets one document image or a group of document images including a plurality of document images. It is something that can be done.

  Further, for example, an object to be displayed is divided into a plurality of layers having different areas in advance, and the outline image is divided into several layers from the outline image of the object to the inner image in order of the layers displayed by the area. You may make it display progressively in order.

It is a figure which shows the structure of the document image display apparatus which concerns on this Embodiment. It is a figure which shows an example of a document image. It is a figure which shows the structure of document image data. It is a figure which shows an example of a page list screen. It is a figure which shows an example of a page reference screen. It is a functional block diagram of the document image display device according to the present embodiment. It is a figure which shows the data structure of document image data. It is a figure which shows the data structure of document image data. It is a figure which shows an example of display order information.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Document image display apparatus, 11 Control part, 12 Storage part, 13 Display part, 14 Input part, 20,55 Character part, 21,56 Line drawing part, 22,57 Photo part, 30 Character layer data, 31 Line drawing layer data, 32 Photo layer data, 40 page icons, 41, 51 cursor, 50 document image display area, 52 previous button, 53 next button, 54 page list button, 60 document image data acquisition unit, 61 display control unit, 62 display unit.

Claims (7)

Hand stage you get a page of Tei Rubun Shode chromatography data is configured to include a picture element data generated separately for each images element,
Means for displaying a thumbnail image of a page of the document data, and a thumbnail image display control means for displaying an image element having the largest area among the image elements included in the page as a thumbnail image of the page;
A document image display device comprising: The document image display device according to claim 1,
The thumbnail image display control means displays thumbnail images of a plurality of pages of the document data,
The document image display device includes page display control means for displaying a page when a thumbnail image of any page is designated.
A document image display device characterized by that. The document image display device according to claim 2,
When displaying the page, the page display control means displays each page by displaying each image element included in the page in an order based on an area related to each image element in the page. A document image display device characterized in that The document image display device according to claim 3 ,
The statement Shode over data includes position specifying information for specifying the display position of each image element in the page,
The page display control means, when displaying the page, the order of displaying each image element included in the page on the display means is determined based on the position specifying information included in the statement Shode over data ,
A document image display device characterized by that. The document image display device according to claim 3 ,
The statement Shode over data includes the determined based on the area of the respective image element in the page, the display order information indicating the display order of each picture element in the page,
The page display control means, when displaying the page, each image element included in the page to be displayed on said display means in an order based on the display order information included in the statement Shode over data,
A document image display device characterized by that. Obtaining a page of Tei Rubun Shode chromatography data is configured to include a picture element data generated separately for each images element,
Displaying a thumbnail image of a page of the document data, the image element having the largest area among the image elements included in the page being displayed as a thumbnail image of the page;
A control method for a document image display device. A program for causing a computer to function as a document image display device,
Images is configured to include an element image element data generated separately for each Tei Rubun Shode over data manually stage you get a page of and,
Means for displaying a thumbnail image of a page of the document data, wherein the image element having the largest area among the image elements included in the page is displayed as a thumbnail image of the page;
A program for causing the computer to function as

Images