KR101368960B1 - System and method for displaying electronic documents - Google Patents

Abstract

The present invention relates to an electronic document display method that allows the user to conveniently read an electronic document by automatically zooming in, zooming out, and moving pages according to the eyesight of the reader. An electronic document display method according to the present invention comprises the steps of providing an electronic document having a predetermined data structure, receiving an input for setting a text size, adjusting the magnification of the electronic document based on the set text size And displaying the electronic document at the adjusted magnification.

Description

SYSTEM AND METHOD FOR DISPLAYING ELECTRONIC DOCUMENTS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system and method for displaying an electronic document, and more particularly, to creating a structured electronic document, and to enlarge, reduce and move pages of the electronic document according to the vision of the reader so that the reader can conveniently view the electronic document. And a method and system for displaying the same.

In recent years, with the development of electronic document display devices and the spread of the Internet, the use of electronic documents such as electronic books has been steadily increasing, and a display method of electronic documents has been demanded accordingly. In general, the format of a data file of an electronic document can be largely divided into two ways depending on how it is displayed.

The first approach is "page rearrangement", which reflows and displays the contents of a page according to the size of the screen, such as text or pictures in a page, without maintaining the layout of each page of a book or document. Reflowed Pages). " For example, the file format of an electronic document written in Hypertext Markup Language (HTML) without Cascading Style Sheets (CSS) corresponds to a page rearrangement method. The second method is the "Fixed Layout" method, which displays a fixed layout of each page of a book or document on the screen. For example, a PDF document written in PDL (Page Description Language), which is a language for describing the layout and content of a printed page, corresponds to a fixed layout method.

When reading an electronic document in a page rearrangement method, since the contents of each page are rearranged and displayed according to the size of the screen of the display device, the reader can read one or two pages without having to enlarge or reduce the corresponding page. However, in the case of an electronic document displayed in a page rearrangement method, since it does not have a unique typesetting and layout, the information transmission power may be insufficient, and in the case of an e-book, a reader may feel very low value. have.

On the other hand, because an electronic document provided in a fixed layout method is displayed in a unique typesetting and a fixed layout, the typesetting and layout of the page can provide a better information delivery ability, and in the case of an e-book, Value can also be higher than page rearrangement. By the way, in the fixed layout method, when the entire page is displayed on the monitor screen, the characters are too small to be read, and on the other hand, when the page is enlarged to the extent that the characters of the page can be read, the entire page is displayed on the screen. There is a problem that only a part of the screen is not displayed. Therefore, in this case, in order to read the entire page of the e-book or the document, the reader may have to read the document by zooming in or out while moving the page in a desired direction using a user interface such as a mouse or a finger touch. There is a problem.

Korean Laid-Open Patent No. 10-2001-0061340 (Jul. 2001.07.)

The structure of the data file of an electronic document such as an electronic book is formed in a hierarchical structure of "Book> Pages> Group> Line> Object", that is, book, page, group, line, and object in order. Accordingly, the present invention provides an electronic document display method and a system therefor, which can automatically track and display contents of an electronic document sequentially.

In addition, a user interface such as a keyboard or a touch screen provides a function for inputting information about a minimum size of text that can be read by a reader, and automatically displays a page of an electronic document based on the information of the minimum text size. Provided are an electronic document display method and system that can set an enlargement or reduction ratio.

In addition, the document display system and method according to the present invention provides a function of automatically selecting a total of eight magnifications that can be supported in an e-book.

In addition, the document display system method according to the present invention, when dividing and expanding the group to be displayed on the screen, such as when a single object is composed of a large image, how many to divide it, how to enlarge and reduce the magnification of the divided portion, It provides a function that automatically calculates coordinate values of each partition.

An electronic document display system according to an embodiment of the present invention includes a storage unit for storing an electronic document having a predetermined structure, an input unit configured to receive an input for setting a text size, and an enlargement of the electronic document based on the set text size. And a control unit configured to adjust the magnification, and a display unit configured to display the electronic document of the adjusted magnification.

An electronic document display method according to an embodiment of the present invention, the step of providing an electronic document having a predetermined structure, receiving an input for setting the text size, the magnification of the electronic document based on the set text size Adjusting, and displaying an electronic document of the adjusted magnification.

According to the electronic document display method and system according to the present invention, when the size of a page (a geometrical set such as a document, a picture, a table, etc.) to be displayed on the screen is out of the display range of the screen, the user's input is conveniently minimized. You can review or read the page.

Using the electronic document display method and system according to the present invention, it is possible to display electronic documents such as electronic books in a fixed layout manner while being convenient to read electronic documents such as electronic books in a rearranged manner.

Using the electronic document display method and system according to the present invention, the user sets the maximum text size that can be read by the user, and automatically selects whether to read sequentially or reversely, and automatically enlarges the e-book on the screen. It can be reduced and moved to provide to the user (reader).

By utilizing the system of the present invention, it is possible to simultaneously provide the convenience and convenience of the page rearrangement method and the beauty and value of the fixed layout method, so that it is possible to manufacture and distribute a high-priced e-book while being actually sold.

1 is a block diagram showing a configuration of an electronic document display system for displaying an electronic document according to an embodiment of the present invention.
2 is an exemplary view showing an example of groups constituting an arbitrary page in an e-book.
3 is a block diagram illustrating a method of displaying an e-book according to an embodiment of the present invention.
4 is an exemplary view showing an example of setting the size of readable text according to an embodiment of the present invention.
5 is an exemplary view showing an example of setting the size of readable text according to an embodiment of the present invention.
6 is an exemplary view illustrating an example of displaying an electronic document on a display screen at a predetermined magnification according to an embodiment of the present invention.
7 is an exemplary view illustrating an example of displaying an electronic document on a display unit screen at a predetermined magnification according to an embodiment of the present invention.
8 is an exemplary view illustrating an example of displaying an electronic document on a display unit screen at a predetermined magnification according to an embodiment of the present invention.
9 is an exemplary view illustrating an example of displaying an electronic document on a display unit screen at a predetermined magnification according to an embodiment of the present invention.
10 is an exemplary view illustrating an example of displaying an electronic document on a display unit screen at a predetermined magnification according to an embodiment of the present invention.

Hereinafter, an electronic document display method and system according to the present invention will be described in detail with reference to the accompanying drawings. In an embodiment, the electronic document includes all documents provided through an electronic display device such as an electronic book, and for the sake of convenience of explanation, the electronic book will be described as a main example.

1 is a block diagram showing a configuration of an electronic document display system for displaying an electronic document according to an embodiment of the present invention. The electronic document display system 100 includes a storage 110, an inputter 120, a controller 130, and a display 140. The storage unit 110 stores an e-book file having a predetermined data structure. In an embodiment, the e-book file stored in the storage 110 may be configured as a data structure including an image area showing an entire image of each page, an area of code values of texts present in each page, and an internal text area. Can be. The image area of the electronic document file according to an embodiment may be an area in which an image, a picture, or a command of allowing a computer to immediately generate an image of each page is actually collected.

In an embodiment, the internal text area includes an object including "text", "image", "table text", etc. as a minimum unit that constitutes the content of the electronic document as a logical area. Here, the text literally means text, and the image includes a photograph, a picture, an equation represented by an image, a table, and the like. Table text is text that describes an image, usually hidden text that isn't displayed on the screen. Each object in the e-book file contains "text code," "text attribute" and "coordinates on screen" information. The text code is a code for displaying the text on the screen of the display unit 140, and the text property is font information of the text, for example, information about bold, underline, and italics. In addition, the coordinate information on the screen includes size information of each text in the original of the e-book file. You can use this information to track where text and images are located and occupy the entire image area of the page. In addition, text search can be performed on tables, pictures, and formulas expressed in image format in electronic documents such as e-books, and table texts also have coordinate values on the screen as objects. You can even search where you are on the page.

In an embodiment, the inner text area includes a line that is a collection of objects. As mentioned above, the smallest unit constituting the internal text area of an electronic document file is an object, which exists on the same horizontal straight line (for landscape books), or vertical straight line (for vertical books) among these objects. When you collect the objects, it becomes a line. That is, a line represents a set of objects on the same line.

In an embodiment, the inner text area includes a group that is a collection of certain lines. In an e-book, groups can be set up by grouping the lines to which the text content is appropriately linked on each page. In other words, a group represents a set of lines in which the connection of contents naturally proceeds when the contents are read out. For example, a group according to an embodiment may obtain a cluster distribution of at least one object by analyzing coordinate values of objects included in at least one line, and set a group by clustering by clusters. The group here may be similar to the paragraph.

In an embodiment, the internal text area includes a page that is a collection of groups. One group may form one page. That is, pages and groups may be the same. However, in order for a page and a group to be the same, the page must be a document having one paragraph. If a page consists of multiple paragraphs, the page must consist of several groups. This is because a document composed of a plurality of paragraphs may exist on the same line but may not be connected to each other if read intact. If the lines in the group are read out sequentially, the content must be correctly connected. The inner text area contains a book, which is a collection of pages. The e-book file according to the embodiment is stored in the storage unit 110 in a hierarchical structure in the order of "book> page> group> line> object," that is, book, page, group, line, and object.

Meanwhile, as described above, one object may be a line, one line may be a group, and one group may be a page. For example, if there is only one text or image on a particular page of an e-book, one text or image may correspond to a line, a group, and a page.

2 shows an example of groups constituting an arbitrary page in an e-book. As shown in FIG. 2, the groups (1, 2, 3, 4) in the pages may be determined in order. The order of each group may correspond to the display order of the electronic document. When the electronic document is displayed on the screen of the display unit 140, the order of the groups is determined according to the order of the contents in the e-book. When the e-book is displayed on the display unit 140, the controller 130 may control to display the page in the order of the page, the group, and the line.

The input unit 120 is an interface for receiving user input such as a keyboard, a mouse, and a touch screen. Although the input unit 120 and the display unit 140 are shown in different configurations in FIG. 1, the input unit 120 and the display unit 140 are not limited thereto, and the input unit 120 and the display unit 140 may be integrally formed using a touch screen.

3 is a block diagram illustrating a method of displaying an e-book according to an embodiment of the present invention. Hereinafter, a method of displaying an e-book according to an embodiment of the present invention will be described in detail with reference to FIGS. 3 to 10.

The user may arbitrarily set the size of the text displayed on the screen of the display unit 140 by selecting the text size setting mode through the input unit 120 (S310). When the text size setting mode is set through the input unit 120, the controller 130 controls the display unit 140 to display the text setting interface on the screen. The user may input information on the minimum size of text that the user can read through the text setting interface.

Meanwhile, since the size of the text actually displayed may be different depending on the screen resolution of the display 140, it is necessary to calculate the size of the actually displayed text. When the minimum readable text selected by the user is displayed on the screen, the text size on the actual screen may be calculated as follows. For example, the user selects X (point) as the minimum size of text that can be read by the user, the screen resolution of the display unit is Y (pixel per inch), and the magnification of the text set by the operating system. If Z (pixels / point, reference 1 is used in Mac OS X and 4/3 in MS-Windows), the actual size (S _R ) of the readable text actually displayed on the screen is It can be calculated as

Here, the symbol {} means an operation symbol rounded off to one decimal place.

4 and 5 illustrate examples of setting a text size by a user, and show an example of a screen for setting a minimum text size that a user can read in a tablet computer equipped with a touch screen. As shown in FIGS. 4 and 5, the text size may be set by drag input using a finger, a stylus, or the like on predetermined portions 410 and 510 on the touch screen of the tablet computer. The size of the text may be adjusted according to the drag length, and example sentences 420 and 520 showing text of a size corresponding to the drag length may be displayed together on the screen.

In the above-described embodiment, the configuration of setting the text size to the length of the drag input on the touch screen has been described, but the text size setting is not limited thereto. In another embodiment, the user may directly set a text size using a keyboard or provide a text size on the screen of the display 140 as a pull-down or pull-up menu, and select the text using a mouse pointer. The size can be configured to be selected using a so-called radio button having a circular shape.

In an embodiment, when the user selects the minimum readable text size set by the user through the input unit 120, the controller 130 reads the e-book file from the storage unit 110 and the e-book file at a predetermined magnification. Selects an enlargement ratio to display the e-book file on the screen of the display unit 140 by comparing the text size in the e-book file of each magnification and the set readable text size. In the following description, the calculation is performed with eight magnifications according to the embodiment.

As illustrated in FIG. 6, the first magnification is an enlargement ratio that displays both the main body of both pages of the e-book and the side portions of the book. The second magnification is an enlargement magnification (not shown) which displays only two pages of the book together with a margin without a side portion of the e-book, and the third magnification magnifies both two pages of the e-book as shown in FIG. The magnification is displayed but the margin without text is not displayed. In addition, the fourth magnification is an enlargement magnification (not shown) in which one page and a side portion of the e-book are displayed, and the fifth magnification magnification is an enlargement magnification in which only one page of the e-book is displayed but no side portion is displayed ( (Not shown), and the sixth magnification is an enlargement magnification (not shown) in which only one page of the e-book is displayed but no margin without text is displayed. As shown in FIG. 8, the seventh enlargement magnification is an enlargement magnification in which a whole page is not displayed and the groups in the page are grouped and displayed in group units, and the eighth magnification is shown in FIGS. As described above, the magnification is displayed by dividing one group and displaying only a part of the group on the screen.

 The controller 130 enlarges the e-book read from the storage 110 at the first to eighth magnifications described above (320). Thereafter, the controller 130 compares the text size of the e-book adjusted at each magnification with the minimum readable text size selected by the user (330). As a result of the comparison, select magnifications in which the text in the enlarged e-book is displayed equal to or larger than the minimum readable text size, and select an enlargement magnification in which the entire outline of the e-book can be displayed the most among the selected magnifications ( 340).

Meanwhile, as described above, the physical size of the text displayed on the screen of the display 140 may be displayed differently according to the screen resolution of the display 140. Therefore, in order to determine which of the above eight magnifications, the e-books according to the magnification are equal to or larger than the minimum readable text size, it is necessary to calculate the actual physical size of the text displayed on the screen at each magnification. Hereinafter, a method of calculating the physical size of text displayed on the screen at each magnification according to an embodiment will be described.

For example, if the size of the original image of a particular page is A (pixels), and the size of the image is B (pixels) when this page is displayed on the screen, the magnification (M) is calculated as shown in Equation 2. Can be.

As described above, an object having information about each text includes coordinate values along with code values and attribute values (bold, underline, italic, etc.) of the text. At this time, if the coordinate value included in each object corresponds to the original size of the corresponding text, and S (pixel), the actual size (S _R ) displayed on the screen is calculated as shown in Equation 3 below. can do.

Equation 3 shows the actual size of all the characters displayed on the screen for each of the eight magnifications, and compares this to the minimum readable character size set by the user calculated by Equation 1 The magnification can accurately determine whether to display the e-book. In this case, a set of texts displayed on the screen is changed for each of the eight magnifications. For example, in the first magnification, it is necessary to determine whether the text is larger than or equal to the readable text in consideration of the sizes of all the texts of the two pages, but in the seventh magnification, only the sizes of the texts belonging to the group need to be considered. Instead of comparing all the text displayed at that magnification with the minimum readable text size, only the smallest text is displayed among the displayed texts, and only the selected text is compared with the minimum readable text size. .

Subsequently, when the enlargement magnification is selected, it is input through the input unit 120 whether the reading direction of the e-book, that is, the advancing direction of displaying the contents of the e-book, is forward or reverse (350). Input of the reading direction can be input using a finger touch or a mouse drag on the touch screen. For example, when a finger touch or a mouse drag is moved from right to left, it is an indication to read sequentially and vice versa. In this way, you can enter the reading direction as an indication that you will go back in the opposite direction.

 In this case, since the order of displaying the contents of the e-book is determined according to the exemplary embodiment of the present invention, the contents to be read by the user may be sequentially displayed on the display unit 140 without an error. As described above, when the magnification and reading direction of the e-book are determined, the control unit 130 follows the order of pages, the order of groups in the same page, the order of lines in the same group, and the order of objects in the same line. The display unit 140 is controlled to be displayed. Therefore, the electronic book display system according to the present invention can automatically provide the user with the most optimized magnification and reduction magnification and the positional movement of the content if the user sets only the appropriate font size and reading direction.

Meanwhile, as described above, one object may be one line, one line may be one group, and one group may be one page. In other words, a group may consist of one object, which is a very small unit, so most of the time it is not necessary to divide and expand the group itself. However, an exception may occur when a large image becomes an object. An image that occupies an entire page is an object, but its size may be similar to a page in an e-book. Therefore, in this case, when the e-book is enlarged at the selected magnification, the image needs to be divided and output to the screen part by part. For example, it may correspond to an eighth magnification of dividing and enlarging a group. Hereinafter, when the image is displayed at the eighth magnification, a method of dividing the image into a plurality of regions and a method of determining the horizontal and vertical size of each divided region will be described.

Hereinafter, the coordinates of the two corners facing the plane in the group are (X1, Y1) and (X2, Y2), and the magnification of displaying the group on the screen of the display unit 140 is displayed as M8. If the smallest size text belonging to the group is equal to the minimum readable text size preset by the user, the screen magnification ratio is MF, and the following equation 4 and the e-book are horizontal writing pages. In the case where the vertical length of the group is longer than the horizontal length and the e-book is a vertical writing page, it is assumed that the horizontal length of the group is longer than the vertical length.

When the e-book is composed of horizontal writing pages, the number N _v to divide the group may be determined as an integer value of the MF / M8 result.

In addition, the vertical length L _v of the divided region may be calculated by the following equation.

Meanwhile, if SP = Y1 + (L _v / 2) and EP = Y2- (L _v / 2), the moving distance D _L between the divided regions may be calculated as follows.

Therefore, the first divided area among the divided areas for dividing and displaying the group becomes a rectangle including coordinates (X1, Y1) and (X2, Y1 + L _v ). The second partition is a rectangle consisting of coordinates (X1, Y1 + D _L ) and (X2, Y1 + D _L + L _v ). That is, the (i + 1) th partition is composed of coordinates (X1, Y1 + i * D _L ) and (X2, Y1 + L _v + i * D _L ).

When the e-book is composed of vertical writing pages, the number N _h of dividing the group may be determined as an integer value of the MF / M8 result.

In addition, the horizontal length L _h of the divided region may be calculated by the following equation.

On the other hand, if SP = X1 + (L _h / 2), EP = X2-(L _h / 2), the moving distance (D _H ) between each divided region can be calculated as shown in Equation 8 below. Can be.

Therefore, the first divided area among the divided areas showing the divided group is a quadrangle consisting of coordinates (X2-L _h , Y1) and (X2, Y2). And the coordinates of the second area are (X2-L _h -D _H , Y1) and (X2-D _H , Y2), and the coordinates of the (i + 1) th area are (X2-L _h -i * D _H , Y1 ) And (X2-i * D _H , Y2).

The e-book enlarged according to the readable text size selected by the user is displayed on the screen of the display unit 140 (360).

While the present invention has been described and illustrated by way of preferred embodiments, those skilled in the art will recognize that various modifications and changes can be made without departing from the spirit and scope of the appended claims.

110 storage
120 control unit
130 input
140 Display

Claims (18)

In an electronic document display system,
A storage unit for storing an electronic document having a predetermined data structure;
An input unit configured to receive an input for setting a text size;
A controller configured to adjust an enlargement magnification of the electronic document based on the set text size; And
A display unit configured to display the electronic document of the adjusted magnification,
The control unit enlarges the electronic document at a plurality of predetermined magnifications, calculates a first physical size when the corresponding text is displayed on the screen of the display unit, based on the text size set as the input of the input unit, After calculating the second physical size when the text of the electronic document of the magnification of the display is displayed on the screen of the display unit, the electronic document is displayed on the display unit by comparing the first physical size and the second physical size. An electronic document display system configured to select a magnification to be performed. The system of claim 1, wherein the electronic document has a hierarchical structure in the order of books, pages, groups, lines, objects, and the objects include text, images, and table text. The electronic document display system of claim 2, wherein the object includes a text code, text attribute, and coordinate information, and the table text is not displayed on the screen as text describing an image. 4. The apparatus of claim 3, wherein the line is a set of collinear objects, the group is a set of predetermined lines, the page is a set of groups, the book is a set of pages, and the pages, groups, lines and Wherein each of the objects is in a predetermined order. The electronic document display system according to any one of claims 1 to 4, wherein the input unit is a touch screen and is configured to set a text size with a drag input on the touch screen. 5. The method of claim 4,
The input unit further includes a configuration for receiving an input for setting the progress direction for displaying the electronic document,
The controller further includes a control to display the electronic document based on the advancing direction,
And the display unit is configured to display the electronic document of the adjusted magnification in the predetermined order based on the advancing direction. delete 7. The electronic document of claim 6, wherein the electronic document is an e-book, and the predetermined magnification is a first magnification of displaying both the body of both pages of the e-book and up to a side portion, without a side portion of the e-book. A second magnification for displaying only two pages of the book together with a margin, a third magnification for displaying both pages of the e-book, but without a blank portion without text, and one page and a side portion of the e-book Display a fourth magnification, a fifth magnification in which only one page of the e-book is displayed, but no side portion is displayed, and a sixth magnification in which only one page of the e-book is displayed but no margin is displayed without text. Magnification, a seventh magnification of displaying one group of the page in the group unit without displaying the entire one page of the e-book, and one group Divided by, the electronic document display system including the eighth magnification to only display on the screen portion of the group. The display apparatus of claim 8, wherein the control unit comprises coordinate values of two corners facing planarly from the group at an eighth magnification, an enlargement magnification of filling the group on the screen of the display unit, and belonging to the group. And divide the group by using the screen magnification when the smallest sized text is equal to the text size input through the input unit. In the electronic document display method,
a) providing an electronic document having a predetermined data structure;
b) receiving input for setting a text size;
c) adjusting the magnification of the electronic document based on the set text size; And
d) displaying the electronic document at the adjusted magnification,
The step c)
c1) enlarging the electronic document at a plurality of predetermined magnifications;
c2) calculating a first physical size when the corresponding text is displayed on the screen of the display unit based on the set text size;
c3) calculating a second physical size when the text of the electronic document of the predetermined magnification is displayed on the screen of the display unit;
c4) comparing the first physical size with the second physical size; And
c5) selecting an enlargement magnification for displaying the electronic document on the display unit according to the comparison result. The method of claim 10, wherein the electronic document has a hierarchical structure in the order of a book, a page, a group, a line, an object, and the object includes text, an image, and table text. The method of claim 11, wherein the object includes a text code, text attributes, and coordinate information, and the table text is not displayed on the screen as text describing an image. 13. The apparatus of claim 12, wherein the line is a collection of collinear objects, the group is a collection of predetermined lines, the page is a collection of groups, the book is a collection of pages, and the pages, groups, lines and Wherein each of the objects is in a predetermined order. The method of any one of claims 10 to 13, wherein the text size is set by a drag input on a touch screen. The method of claim 13,
The step b) further includes the step of receiving an input for setting the progress direction of displaying the electronic document,
The step c) further includes controlling to display the electronic document based on the advancing direction,
The step d) further comprises the step of displaying the electronic document of the adjusted magnification in the predetermined order based on the advancing direction. delete 16. The electronic document of claim 15, wherein the electronic document is an e-book, and the predetermined magnification is a first magnification of displaying both the body of both pages of the e-book and up to a side portion thereof, without a side portion of the e-book. A second magnification for displaying only two pages of the book together with a margin, a third magnification for displaying both pages of the e-book, but without a blank portion without text, and one page and a side portion of the e-book Display a fourth magnification, a fifth magnification in which only one page of the e-book is displayed, but no side portion is displayed, and a sixth magnification in which only one page of the e-book is displayed but no margin is displayed without text. Magnification, a seventh magnification of displaying one group of the page in the group unit without displaying the entire one page of the e-book, and one group Divided by, the electronic document display method of claim 8 including a magnification of only a portion of the group displayed on the screen. 18. The method of claim 17, wherein the coordinate value of two corners facing planarly in the group at the eighth magnification, the magnification of filling the group on the screen of the display unit, and the smallest belonging to the group. And dividing the group by using a screen magnification when the text of the size is equal to the text size input through the input unit.

Images