JPH08106469A - Method and device for page-turning display control - Google Patents

Abstract

PURPOSE: To provide the page-turning display controller which can give visual effects close to a feeling of page turning of a book familiar in the actual world and be actualized with inexpensive and simple system constitution. CONSTITUTION: This device displays data on a display device in a book shape, page by page, and displays an animation of the turning of pages when the pages are turned over, and is provided with a means 51 which detects a page turning-over speed that a user requests, a means 52 which sets the turning speed of pages from the page turning-over speed, a means 61 which arranges the data in specific positions in the pages, a storage means 90 which temporarily holds currently displayed data and data to be displayed next together with the display positions in the pages, a means 71 which deforms the pages according to the rotating speed, a means 72 which deforms the data in the pages according to the rotating speed, a means 73 which automatically moves the display position of the data in the currently turned-over page from the specific position according to the rotating speed, and a means 74 which puts the currently turned-over page and data preferentially together with the stationary page and data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a page turning display control apparatus for displaying various information such as document data and image data page by page in the form of a book and displaying an animation for turning the page when switching pages. .

[0002]

2. Description of the Related Art For displaying various kinds of information such as document data and image data page by page on a display screen of an information processing device, pages designated by a user are displayed sequentially or suddenly, or The page was switched by scrolling the page on the screen. But,
In this device, it is difficult to know which page in the whole is being displayed, and since it is a two-dimensional scrolling within the limited display surface, the efficiency in searching for information is poor. Furthermore, when the page is switched, the display changes in an instant, and it is difficult to say that the display is familiar to the user because it is not immediately known whether the page has changed.

Therefore, there has been proposed a device that imitates a book that humans are familiar with so far and displays an animation of turning a page (hereinafter referred to as a page turning animation) when switching pages. FIG. 14 shows a typical screen display example of this page turning animation in the prior art.

In FIG. 14A, when turning a page from the currently displayed page to a designated page, the pages up to the designated page are folded from the right end, and the front surface of the currently displayed page is the back surface of the folded page. It is characterized by gradually exposing the entire page specified by the user while hiding it with (blank paper). This is an animation of gradually opening the specified page while gradually hiding the currently displayed page in a plane, so it is easy to realize as a program on an existing personal computer or workstation, but in the real world. Compared to the book I'm used to, it still feels strange. As such a publicly known example, Japanese Patent Laid-Open No. Hei 4
There is an "information display system having a turning function" disclosed in Japanese Patent Publication No. 21068.

Next, FIG. 14B is a page-turning animation that expresses how the pages to be turned turn, and gives the user a three-dimensional display effect of actually turning the pages of a book. I am trying. Such a display may be performed when the screen is switched in a recent television program, which uses a special effect device for television program production. Since this special effect device is expensive and not suitable for general use, in the "display method" disclosed in Japanese Patent Laid-Open No. 61-267095, an image pattern of a page turning animation is created in advance, and the page currently displayed is displayed. We propose a method to combine the next page with this pattern. However, even in this method, a dedicated image processing means is required for continuously synthesizing the page and the image pattern, and it is expensive to realize on a general personal computer or workstation.

[0006]

The inventors have also proposed a new "page-turning display control device" as Japanese Patent Application No. 6-108124. In this precedent,
Disclosed is a device that displays a page-turning animation as shown in FIG. 14C by subjecting a page in the process of page-turning to projective transformation processing and synthesizing it with another page. Since this animation is processed by projective transformation so that the page turning looks three-dimensional, it gives the user a visual effect similar to turning a book familiar in the real world.

As a method for realizing the invention of the preceding example,
There are a method to generate the page turning animation in real time and a method to generate the animation or its parts in advance. In the former case, a means for projectively converting the image in real time and a means for synthesizing the image after the projective conversion and the page image are required, which makes the apparatus expensive. On the other hand, in the latter case, since the projective transformation process and the image synthesizing process do not require real-time processing, these processes can be realized by an inexpensive device such as software. However, it takes a lot of time to create an animation, which makes it unsuitable for frequent page editing.

As described above, in order to give the user a visual effect similar to the one in which a page-turning animation is used to turn a familiar book in the real world, a dedicated image processing means is required. The devices tended to be expensive and complex. Further, even if an attempt was made to realize an inexpensive system configuration by using only software on a personal computer or a workstation, there were restrictions such as insufficient visual effects of page turning and limited applications.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a page turning display control method and apparatus which gives a user a visual effect similar to turning a book familiar in the real world and can be realized with an inexpensive and simple system configuration. It is in.

[0010]

A page turning display control device of the present invention is a device for displaying data in the form of a book on a page unit on a display device and displaying an animation for rotating a page when turning a page. The page turning speed detecting means for detecting the page turning speed requested by the user, the page turning speed setting means for setting the page turning speed from the page turning speed, and the data arranged at a predetermined position in the page. A data arranging means for storing the data, a storage means having a work area for temporarily holding the data currently displayed and the data to be displayed next together with the display position in the page,
According to the rotation speed, a page transforming means for transforming the page being turned, a data transforming means for transforming data in the page being flipped according to the rotation speed, and a page being flipped according to the rotation speed. A data display position moving means for automatically moving the display position of the data from the predetermined position, and a synthesizing means for preferentially synthesizing the page and the data being turned over with the still page and the data. Have.

The page transforming means transforms the page so that the page is gradually reduced from its original size in the direction in which the page rotates, and then the page that has been sufficiently reduced is gradually enlarged to the original size. Transform to do.

The data transforming means transforms the data so that the data is gradually reduced from the original size in the direction in which the page rotates, and then the sufficiently reduced data is gradually enlarged to the original size. Transform to do.

The data display position moving means moves the data to a position in which the distance from the rotation axis gradually decreases from the predetermined position in the direction of page rotation, and then the distance from the rotation axis is sufficiently increased. The data is gradually moved from the short position to the predetermined position.

A rate of change in which the page transforming means reduces the page from the original size and a rate of change in which the page is enlarged to the original size, and a rate of change in which the data transforming means reduces the data from the original size. And the rate of change that expands to the original size,
The rate of change of the distance by which the data display position moving means moves the data from the predetermined position in the rotation axis direction to the tail and the rate of change of the distance from the rotation axis direction to move the data to the predetermined position are equal.

The data display position moving means moves the data in the vertical direction as well as in the direction in which the page rotates, so that the distance from the vertical centerline of the page gradually increases from the predetermined position. Then, the data is moved to a predetermined position from a position where the distance from the center line is sufficiently long.

The distance by which the data display position moving means moves the data vertically from the predetermined position and the distance by which the data is moved to the predetermined position is proportional to the angle formed by the rotating page and the stationary page. Preferably.

The page-turning display control method according to the present invention is a display control method in which data is displayed page by page in the form of a book on a display device and an animation for rotating the page is displayed when turning the page. Then, the shape of the page being turned and the data in that page are projectively transformed only in the page turning direction according to the rotation angle of the page, and the page being turned is transformed according to the result of this projective transformation. The shape and the data in the page facing the front,
As the page is turned, it is sequentially reduced and enlarged only in the page turning direction, and the position of the data in the page facing the front is moved in the direction approaching the rotation axis with the reduction, and in the direction perpendicular to this. The upper half and the lower half of the page move in the direction away from each other, and along with the enlargement, move in the direction away from the rotation axis and move in the direction perpendicular to this in the direction in which the upper half and the lower half of the page approach each other. It is characterized by

[0018]

As described above, the inventors have already proposed a page turning display control device for displaying an animation as shown in FIG. 14 (C). Since the present invention is a development of the invention proposed above, the invention of the future will be briefly described first.

FIG. 3 is a view of the actual page turning as viewed from the vertical direction (viewed from the bottom side of the book along the spine of the book), and shows the principle of page turning display according to the previous invention. . Δ in FIG. 3 represents the angle formed by the turned (rotating) page and the stationary page, and is hereinafter referred to as the page rotation angle (or page angle). Further, α represents an angle at which the page rotates per unit time, and is hereinafter referred to as a page rotation speed (or page angular speed). In general, animation is composed of a plurality of frames (screen data), and thus the page rotation speed may be considered as an angle at which a page rotates per frame.

In FIG. 3, the page turning speed is converted into the page rotation speed α, and the page 15 is converted according to the page rotation speed α.
And the page 16 corresponding to the back surface thereof rotates. At this time, page 14 and page 17 remain stationary. By projecting this on the projection surface 2 from the light source (also the viewpoint) 1, the animation shown in FIG. 14 (C) is displayed. Of course, the page rotation speed α can be set finer than that shown in FIG. 14C, and in that case, smoother page turning can be achieved. As described above, in the page-turning display control device according to the previous invention, since the projective conversion processing is performed so that the page-turning looks three-dimensional,
It is possible to give the user a visual effect similar to turning a book that is familiar in the real world, and improve the user's affinity for the device.

In the process of generating the page-turning animation in the above invention, roughly speaking, the step of projectively converting the page image being turned according to the page rotation speed, and the page image after the projective conversion are stationary. There is a step of combining with other page images. Here, the page image means image data in which a screen image of a page in which data is arranged is captured.

Before describing each step, the principle of the projective transformation process will be described with reference to FIG. When the horizontal direction of the projection plane is the X axis, the vertical direction is the Y axis, and the vertical direction is the Z axis, a cross-sectional view of the page rotation on the Y = 0 plane (viewed from the vertical direction) is shown in (A). A cross-sectional view (viewed from the lateral direction) on the X = 0 plane is shown in (B). An image 4 is formed by projecting the page image 3 from the light source 1 onto the projection plane (Z = 0 plane) 2. This image 4 is a page image after projective transformation. As can be seen from FIG. 4, the page width w is W after the projective transformation, and the page height 2 * h is 2 * H after the projective transformation (* is a multiplication operator). Also, any point (x,
y) is converted to (X, Y). The conversion from (x, y) to (X, Y) can be geometrically calculated by Equations 1 and 2. Here, k represents the distance from the light source 1 to the projection surface 2, and δ represents the rotation angle formed by the projection surface and the page at a certain time.

In the step of projectively transforming the page image during the turning, first, the coordinates (that is, W and H) of the four corners of the page after the projective transformation are calculated. This is expressed by Equation 1 and Equation 2, where x = w
And y = h are substituted for calculation. Next, at each point in the page image after the projective transformation, the corresponding coordinate in the original page image is calculated, and the coordinate value of the coordinate is approximated to be the coordinate value at each point. This process is an inverse transform of the projective transform process described above, and the calculation formulas are as shown in Formulas 3 and 4. As a method of approximating coordinate values, the nearest neighbor method that takes the coordinate value of the point closest to the coordinate obtained by calculation, or the coordinate value of each point surrounding the coordinate obtained by calculation is proportionally divided according to the distance. There is a way to add it.

[0024]

[Equation 1]

[0025]

[Equation 2]

[0026]

(Equation 3)

[0027]

[Equation 4]

Next, the page image after projective transformation and the still page image are combined. At this time, the page image after the projective transformation is preferentially combined with the still page image. Alternatively, the width W of the page image after the projective transformation is calculated from Equation 1.
Is calculated, a partial image of a page image having a width (w−W) may be obtained and combined.

In the example for carrying out the above-mentioned invention, a method for performing the projective transformation process in real time by hardware dedicated to image processing, and a method for performing the projective transformation process in advance to generate a page-turning animation (or parts thereof), We proposed two methods of displaying the animation (or the animation created by synthesizing the parts) when turning the page. The former can be widely applied to any purpose, but the system configuration is complicated and the cost tends to be high because of hardware dedicated to image processing. On the other hand, the latter does not require real-time property for the projective transformation process, and thus can be realized by software, and can be realized by an inexpensive and simple system configuration. However, electronic catalog (hereinafter, electronic catalog)
It is suitable for applications that do not require editing with package media such as, but it is not suitable for applications where the page structure changes frequently, such as electronic albums (hereinafter, electronic albums). The use is limited.

It is generally considered desirable that the cost of the user interface is low. That is, it is not desirable to introduce expensive hardware into the system only for page turning display, regardless of the fact that the image processing hardware is originally provided in the system. Rather, page turning display should be realized with the existing system configuration.

It is also considered that the user interface should be general-purpose. For example, a unified user interface should be provided to the user regardless of the purpose, such as a menu or a window in a window system. To this end, there must be no restrictions such as the fact that page turning animations cannot be generated in real time.

Further, the user interface should be familiar and natural to the user. If you want to display information on a page-by-page basis, you want some feedback from the system that the user is naturally flipping through pages when switching pages. Also,
The feedback is real (similar to the real world)
The more the user feels the friendliness, the better the usability. The page-turning animation in the previous invention was fully satisfactory in this regard.

Therefore, the present invention provides a page turning display control device capable of generating a page turning animation in real time within the range of the existing system configuration without impairing the visual effect of the page turning animation in the previous invention. suggest.

With the constraint that it can be realized within the range of the existing system configuration without adding special hardware,
Realization by software is a condition. However,
If the above-mentioned generation of page-turning animation is programmed obediently, it will be too late for real-time processing. Therefore, it is necessary to reduce the load of animation generation processing in some way and make it in time for real-time processing. Moreover, at this time, I want the visual effects of animation to be comparable to those of the previous invention.

The projective conversion process takes the longest time in the process of generating the page turning animation.
Therefore, the basic policy is to simplify the projective transformation process. Also, by utilizing the illusion of the human eye, devise such that the visual effect is not impaired even if the projective transformation process is simplified.

According to the present invention, the data arranging means for arranging data at a predetermined position in the page, the page deforming means for deforming the page according to the page rotation speed, and the data deforming means for deforming the data within the page according to the page rotation speed. A data display position moving means for automatically moving the display position of the data in the page being turned according to the page rotation speed from the predetermined position, and the page and the data being turned still and the page being turned. And means for preferentially synthesizing.

First, by providing the data arranging means, the page transforming means, the data transforming means, and the page and data synthesizing means, the projective transformation process has been performed on the entire page image so far. It becomes possible to transform by dividing into the data of. The "page" here is the mount before attaching the data, and the "deformation process" of the mount is nothing but making the frame of the transformed page by obtaining the conversion coordinates of the four corners of the mount. . In other words, it is possible to reduce the amount of processing for deforming the blank area other than the area where the data is pasted in the page. Further, the process of transforming a page and data further simplifies the projective transformation process and reduces the amount of processing for generating a page-turning animation. Details of this page and the data transformation process will be described later.

Further, if the page or data transformation process is simplified from the projective transformation process, the visual effect of page turning may be lost to some extent compared to the previous invention. In the present invention, the data display position moving means included in the projection converting means in the previous invention is independent of the page transforming means and the data transforming means. This induces the illusion of the human eye by moving the display position of the data according to the page turning, and minimizes the visual effects lost by simplifying the transformation process of the page and data from the projective transformation process. I'm aiming for that.

Specific processing performed by the page transforming means, the data transforming means, and the data display position moving means will be described below.

First, the page transforming means transforms the page so that the page is gradually reduced from the original size in the rotating direction of the page, and gradually reduces the page to the original size. The transformation processing is performed so as to enlarge the display, and these processings simplify the projective transformation processing. Similarly, the data transforming means transforms the data so that the data is gradually reduced from the original size in the direction in which the page is rotated, and gradually enlarges the data from the sufficiently reduced data to the original size. Then, the projective transformation process is simplified by these processes. The "original size" referred to here means the display size when the page and the data are displayed on the screen in a straightforward manner (viewed from the front). Further, the "direction in which the page rotates" is the lateral direction of the paper in FIG. 2, and represents the direction in which page turning proceeds.

This simplification is based on (k−X * s) in Equations 1 and 2 when the light source is placed at infinity in the projective transformation.
in δ) = k, and as a result, equations 5 and 6 are obtained. That is, the expression 5 means that the page or the data is orthographically transformed in the direction in which the page rotates, and the expression 6 means that the page or the data is not deformed in the direction perpendicular to the rotation direction even if the page is rotated.

[0042]

(Equation 5)

[0043]

(Equation 6)

As a result, in the page transformation process,
It suffices to substitute x = w in Equation 5 to obtain the frame of the page mount. Even if there is a color or a pattern on the mount of the page, the coloring and the pattern are collectively applied within the page frame, so that the processing is faster than the process for each pixel in the page.

In the data transformation process, the data width is orthographically transformed, and the original data is simply thinned out so as to match the size. The "simple thinning" here means thinning the data in units of vertical lines according to the reduction rate from the size of the original data. Originally, it is necessary to perform orthogonal projection conversion for each pixel in the data, but since the user generally does not look at the contents of the page in detail during page turning, simple thinning out that conveys the atmosphere of page turning is sufficient. Is. Further, at this time, since the orthogonal projection transformation of the page width and the data width is both performed by the equation 5, the page deformation means changes the rate of reducing the page from the original size and the rate of changing the page to the original size. Then, the rate of change in which the data transformation unit reduces the data from the original size and the rate of change in which the data expands to the original size are equal.

Further, the data display position moving means moves the data to a position in which the distance from the rotation axis gradually decreases from the predetermined position in the direction in which the page rotates, and then the distance from the rotation axis becomes sufficient. Data is gradually returned from the short position to the original position. In addition, the "rotating shaft" referred to here is as shown in FIG.
Then, it is a boundary line of two pages displayed in a two-page spread, and represents an axis about which the page rotates.

Again, this is because the display position of the data in the direction in which the page is rotated is moved by the equation 5 as in the previous case. The rate of change of the distance that the data display position moving unit moves from the predetermined position in the rotation axis direction and the rate of change of the distance that the data display position moving unit moves from the rotation axis direction to the predetermined position are It becomes equal to the rate of change by which the data transformation means transforms the data.

As described above, it is possible to sufficiently reduce the load of the page-turning animation generation process and make it ready for the real-time process. However, according to the experiments conducted by the inventors, it was felt that this is slightly less realistic than the page turning display according to the previous invention.
In the above invention, the change in the shape and display position of the page or data can be seen not only in the rotation direction of the page but also in the vertical direction thereof for each frame of the animation. On the other hand, in the animation according to the above description of the present invention, pages and data change only in the rotation direction. It is considered that this difference in change in the vertical direction appeared as a difference in realism.

Therefore, in the present invention, the data display position moving means capable of moving the data to an arbitrary position is caused to move the data in the vertical direction as well as the direction in which the page rotates. Moreover, in consideration of the original vertical projective transformation process, Equation 2, the data is moved to a position where the distance from the vertical centerline of the page gradually increases from a predetermined position, and then the centerline is moved. The position is gradually returned from a position where the distance from is sufficiently long to a predetermined position. Further, the distance that data moves vertically from a predetermined position and the distance that data returns to a predetermined position are proportional to the angle formed by a rotating page and a stationary page. As a result, the data movement direction is symmetric when viewed from the vertical centerline of the page, and the data movement distance is also symmetric when viewed from the centerline.

As described above, the equation (2) is approximated by the equation (6), and mathematically, nothing changes in the vertical direction. However, it seems uncomfortable for humans to approximate what originally changed without any change. In the present invention, by introducing a change in the display position of data in the vertical direction, even if it does not match the mathematical expression,
Inviting the illusion of the human eye, it is now possible to display pages that are as realistic as the previous invention. Further, it is conceivable that the page transforming means and the data transforming means also transform the page and the data in the vertical direction, but since this increases the processing amount, this transformation should be avoided as much as possible.

An example of the page turning display according to the present invention described above is shown in FIG. It should be noted that since the page and the data are deformed according to Equation 5, the amount of change for each frame is not constant, is large near the axis of rotation, and is small near the start and end of page turning. This is
It can be seen from FIG. 5, which is a graph of the equation 5.

[0052]

An embodiment of the present invention will be described below with reference to the drawings.

First, FIG. 1 shows a basic configuration and a display example of a page turning display control device according to an embodiment of the present invention. The basic configuration of this device is input means 130 such as a pen or a button.
And a page turning control unit 50 that analyzes the input from the input means 130 and executes a page turning command,
A data storage unit 140 that stores various types of information such as document data and image data; a page generation unit 60 that reads data from the data storage unit 140 and arranges the data in a page;
A work area 90 for temporarily holding the currently displayed data group and each display position 91, a data group to be displayed next and each display position 92, and a page turning animation generation unit 70 for generating a page turning animation in real time.
And a page turning display unit 80 for displaying a page turning animation in real time.

The page turning control unit 50 detects the page turning speed required by the user, means 52 for automatically setting the page turning speed from the page turning speed, and the direction in which the user wants to turn the page. It has means 53 for detecting and means 54 for detecting the number of pages that the user wants to turn at the same time. Here, the page rotation speed is
Set to be proportional to the page turning speed.

The page generation unit 60 also has a data arranging unit 61 for reading the data to be displayed next from the data storage unit 140 and arranging it at a predetermined position within the page. The position of the data in the page is automatically determined in consideration of the size of the page and the data. Alternatively, a table for arranging data may be provided and the data may be arranged according to the table. Of course, the user can freely change the data arrangement.

The page-turning animation generating section 70 also transforms the page according to the page rotation speed, the page transforming means 72 for transforming the data within the page according to the page rotation speed, and the page-turning speed according to the page rotation speed. The data display position moving means 73 for automatically moving the display position of the data in the inside page from the predetermined position, and the page and the data being turned are preferentially combined with the stationary page and the data. Means 7
4 and. Page transformation means 71 and data transformation means 7
In 2, in order to generate a page turning animation in real time, the projective transformation process is simplified and the page and data are transformed. Further, the data display position moving means 73 induces the illusion of the human eye by moving the display position of the data in accordance with the page turning, and the visual loss lost by simplifying the transformation of the page and the data from the projective transformation process. Minimize the effect.

Further, the page turning display section 80 is a means 81 for displaying moving images such as animation and still images.
And means 82 for creating and displaying the thickness of the book according to the page number, and means 83 for creating and displaying the thickness of the page according to the number of pages that the user wants to turn at the same time.
Further, the moving images and still images, and the thicknesses of books and pages are displayed on the display 10. Generally, in a personal computer or workstation equipped with a GUI (graphical user interface), a program for drawing a rectangular area or a program for displaying an image is prepared.
The present invention can be efficiently implemented by using such a program.

Next, the page turning animation display according to the present invention will be described. In this embodiment, data is arranged in two pages displayed in a two-page spread type. The screen components include an operation menu 11 for turning pages and other editing operations, a book thickness button 12, a stationary left page 14, a stationary right page 17,
It consists of page 15 in the middle of turning and a data group arranged in the page. The data includes image data 26 and text data 34. Alternatively, one scene of moving image data may be pasted as clip image data, and the moving image may be played back in response to a request from the user. In particular, in the present embodiment, since the display interface of the multimedia database such as an electronic album is considered as an application, the text data has a meaning of a title or caption of image data or moving image data. Further, the data in the page 15 during the turning is transformed and displayed like the image data 22. The thickness buttons 12a and 12b of the book here have a width proportional to the number of remaining pages and the current page number, respectively. For example, if the 30th page is currently displayed out of the total 100 pages, the book thickness button 12a indicates the remaining 7 pages.
The width is proportional to 0 pages, and the thickness button 1 of the book
2b has a width proportional to 30 pages of the current page number. As a result, the user can visually confirm where the currently displayed page is located in the entire book.

The "button" is a term indicating a circular operation area displayed on the display screen, which can be usually pointed by a pointing device such as a mouse, and the thickness buttons 12a, 12b in this embodiment are Although not circular, it is called a button for convenience. The specific operation of the thickness buttons 12a and 12b will be described later.

The page-turning animation in this embodiment shown in FIG. 2 is composed of frames 40 to 47, and each frame has a book thickness button 12, pages 14 to 17, image data 20 to 27, and text data 30 to 34. Consists of. In the case of page turning in the forward direction, the animation proceeds from the frame 40 to the frame 47 in the direction of the arrow in the figure, and in the reverse direction, the frame 47 to the frame 40.
The animation progresses in the opposite direction to the arrow.

The case where one page is turned in the forward direction will be described below. Further, since the processing for each frame is the same in the case of the reverse direction as well, description thereof is omitted. First, in frame 40, image data 20-23 and text data 30-32 are displayed on pages 14 and 15. Page turning starts, and in frame 41, page 15 is reduced in the page turning direction (page 15a), and image data 22 and 23 are also reduced (image data 22a and 23a). Also,
The display positions of the image data 22a and 23a move in the turning direction and also move away from the center in the vertical direction. Then, the page 17 hidden behind the page 15 appears slightly. Further, the thickness button 12a of the book is narrowed by reducing the width of the thickness for one page. Similarly, in frame 42, page 15 is further reduced (page 15b) and image data 22 and 23
Is further reduced (image data 22b and 23
b). The display positions of the image data 22b and 23b are also
They are moving further in the flipping direction and further moving vertically away from each other. And page 1
The page 17 hidden behind the page 5 appears further, and along with this, the image data 26 and 27 and the text data 3
4 is gradually displayed. The same applies to the frame 43.

Next, from the frame 44, the page 15 is turned over, and the page 16 and the image data 24 and 25 on the back side of the page 15 appear on the front side, and the page 14 and the image data 20 and 21 and the text data 30 are displayed. 31
Is gradually hidden behind page 16. Frame 44
Then, page 16 is sufficiently reduced in the horizontal direction (page 16c), and images 24 and 25 are also sufficiently reduced (image data 24c and 25c). The display positions of the image data 24c and 25c are also sufficiently close to the rotation axis, and are sufficiently far from the center line of the page in the vertical direction and close to the edge of the page. In frame 45, frame 44
The page 16 is gradually enlarged from the above state to return to the original size (page 16b).
5 is also gradually expanded to return to the original size (image data 24b and 25b). In addition, the image data 24b and 25
The display position of b also gradually returns to the position to be originally displayed. Then, as the page 16 is enlarged to return to the original size, the page 14, the image data 20 and 21, and the text data 30 and 31 are gradually hidden. Frame 46
The same applies to. Finally, the frame 47
At, the page turning is completed, and the image data 24 and 25 and the text data 33 are displayed on the page 16,
Image data 26 and 27 and text data 34 are displayed on the page 17. The thickness button 12b of the book is widened by increasing the width of the thickness for one page.

In the transformation of the page and the image data in this animation, the width is calculated using the equation (5). Also,
The horizontal movement position of the image data is also calculated using Equation 5. Since the page rotation speed is constant during page turning, the page rotation angle increases by a constant amount for each frame. On the other hand, the calculation result by the equation 5 changes as shown in FIG. In other words, the deformation rate of the page and the image data and the rate of change of the moving distance of the image data between frames are not uniform, and are small at the start of page turning, and gradually increase as the page being turned approaches the rotation axis, and the rotation axis If it goes over, it will become smaller gradually. The way of this change is shown in FIG.
Similar to (C), the animation gives the user a visual effect that makes it appear to be really in motion.

Further, in this embodiment, the text data during the page turning is not displayed. This is because the present embodiment is directed to applications centered on image data such as electronic albums, and it is determined that the text data being turned is not so important as information. Even in applications centering on text data, the same processing as above can be performed simply by providing a mechanism for converting a screen image of text data into image data.

Next, a hardware configuration for realizing this apparatus will be described. FIG. 9 shows a typical hardware configuration of this device. This apparatus includes input means such as a button 131, an electronic pen 132, a mouse 134, a keyboard 135, a magnetic disk 143, an optical disk 141, and C.
A data storage unit such as the D-ROM 142 and the CPU 15
1, a memory 152, and a video memory 153, and these constituent elements are connected by a bus 150. Further, as a peripheral device, an electronic camera IC card 160, a color scanner 161, a color printer 162, a microphone / speaker 163, etc. can be connected. As can be seen from the above, this device can be implemented with the same hardware configuration as a normal computer. In addition, constituent elements such as the page turning control unit 50, the page generation unit 60, the page turning animation generation unit 70, and the like, which are features of the present invention, are implemented as software that operates on the above hardware. That is, no special hardware is required to perform the page turning display, and as a result, the page turning display is performed with an inexpensive configuration.

Next, FIG. 10 shows a processing flow of the page turning display control device according to the embodiment of the present invention. Here, the processing in the page turning control unit 50, the page generating unit 60, the page turning animation generating unit 70, and the page turning display unit 80 will be mainly described. An example of page turning operation will be described with reference to FIGS. 11 and 12.

First, in step 181, a page turning start request from the user is detected. For example, as in the turning operation example 200 of FIG. 11, the user operates the pointing device such as the mouse 134 to move the cursor 19 to the thickness button 12 of the book and pick (click) to start turning the page. Here, the cursor 19 is displayed following the operation of the pointing device. Next, in step 182, the processes from step 183 to step 190 are repeatedly executed until the turning end request from the user is detected. When detecting the end-of-page request, the state of the mouse is checked at regular intervals after the start of turning, and when the mouse is down (the mouse button is pressed down), it is considered that page turning is continued, and the mouse-up (the mouse button is In the case of (released state), it is considered that the user finishes page turning. At this time, the time interval for checking the state of the mouse is
It must be within or less than the time it takes to turn the current page. As described above, the user can repeatedly perform page turning by keeping the mouse down.

Next, in step 183, the page turning speed requested by the user is detected. Operation example 20 of FIG.
According to 0, the position where the thickness button 12 of the book is picked with the cursor 19 corresponds to the page turning speed. For example, when the thickness button 12a of the book is picked, the page turning speed is increased by pointing the cursor 19 to the right side or the upper side in the area of the thickness button 12a, and is lowered when the left side or the lower side is instructed. When picking the book thickness button 12b, the high speed and the low speed are reversed on the left and right. Of course, it is also possible to reverse the way of changing the page turning speed left and right or up and down by the customization of the user. The page turning speed in this case is calculated by A * m / M or A * n / N (A is the maximum value of the page turning speed). Further, a detection method in which the page-turning speed increases in proportion to the time when the thickness button 12 of the book is picked up is conceivable, but the detailed description thereof is omitted here because it is detailed in the above invention. Through the above processing, the user can freely change the page turning speed.

Next, in step 184, the direction in which the user wants to turn the page is detected. Here, it is detected which of the left and right book thickness buttons is picked, and when the book thickness button 12a is picked, the page turning is set in the forward direction, and when the button 12b is picked, the reverse direction is set. Set.

Next, in step 185, the number of pages that the user wants to turn over at the same time is detected. For example, as shown in an operation example 201 of FIG. 12, the user selects a book thickness button 12
If you drag up, the device interprets it as a page jump, turning multiple pages at once. Here, in order to match the intuition of the user, the dragged direction and the page jump direction are matched. That is, when the book thickness button 12a is dragged to the left, the page jump direction is set to the forward direction, and when the book thickness button 12b is dragged to the right, it is set to the opposite direction. Also, the number of pages to flip at once is calculated from the position where the dragging started. In the operation example 201, when the number of remaining pages is P, the number of pages to be turned at once is calculated by P * r / R. Here, r represents the distance from the inner boundary line of the page and book thickness button 12a to the drag start position, and R represents the book thickness button 1
It represents the width of 2a. Therefore, the larger r is, the more pages are turned at once. This intuitively matches the actual page turning operation. If you drag on the book thickness button 12b, r is the page and book thickness button 12b.
The distance from the boundary line of to the drag start position is calculated by the same method as above. This allows the user to specify the page to jump to at a spatial location within the book thickness button.

Next, at step 186, the page rotation speed is set so as to be proportional to the page turning speed.
Here, the page rotation speed is an angle at which the page rotates for each frame. The maximum page rotation speed is π
/ 2 (radian / frame).

Next, in step 187, since the data to be displayed next can be known from the page turning direction, the data is read from the data storage section 140 and placed in the page buffer. The page buffer referred to here is a data group to be displayed next and each display position 92 (FIG. 1) which is temporarily stored in the work area 90, and functions as if it were the page to be displayed next. For example, when turning pages forward in the display example of FIG.
Is stored in the page buffer. Before the page turning is started and the display shifts from the frame 40 to the frame 41, the image data 24 to 27 and the text data 33 to 34 are arranged on the pages 16 and 17 in the page buffer. Below, as shown in frames 41-43, page 1
Page 17 in page buffer as page 5 turns
Is gradually displayed, and as shown in frames 44 to 47, the page 16 in the page buffer is gradually turned up and displayed. It is also possible to provide a data cache area in the work area so that data once read from the page storage unit can be referred to at high speed without re-reading.

In step 187, the display position is automatically determined from the size of the page and the size of the photograph so that the data are evenly arranged in the page. For example, the page height is hp, the width is wp, and the image data 24 (FIG. 2)
The vertical width of the image data 24 is hp1, the horizontal width is wp1, the vertical width of the image data 25 (FIG. 2) is hp2, and the horizontal width is wp2, the display position of the image data 24 is the vertical direction (hp -Hp1-hp2) / 3, laterally (wp-
wp1) / 2. Similarly, the display position of the image data 25 is (hp * 2 + hp1-hp2 * 2) /
3 and (wp-wp2) / 2 in the lateral direction. The display position of the text data 33 is arranged immediately below the image data 25. It is also possible to prepare a table for storing the display position of each image data or text data and arrange each data according to the table. in this case,
The display position of the image data and the text data can be freely changed by the user.

Next, in step 188, the page thickness button 13 whose width is proportional to the number of pages to be turned simultaneously is displayed.
Create and display. The thickness button 13 on this page
Helps the user visually confirm the number of pages to jump. At the same time, the width corresponding to the thickness button 13 of the page is deleted from the thickness button 12 of the book on the turning start side. For example, in the case of FIG. 12, the page thickness button 1
3 is created and the width of the button is set to the thickness button 12a of the book.
Remove from. When the pages have finished turning, step 19
At 0, the width corresponding to the page thickness button 13 is added to the book thickness button 12 (book thickness button 12b in the example of FIG. 12) on the end side of turning.

Further, it is also possible to have a page counter (which can be realized by a variable in the program) for managing the currently displayed page number, and to update the book thickness button 12 from this page counter. That is, when turning pages in the forward direction, the page number in the page counter is increased by the number of turned pages, and the book thickness button 12a is turned on.
Is narrowed in proportion to the number of remaining pages, and the width of the book thickness button 12b is widened in proportion to the current page number. When turning in the opposite direction, conversely, the page number is reduced by the number of pages turned over, the width of the book thickness button 12a is increased in proportion to the remaining number of pages, and the width of the book thickness button 12b is changed to the current page number. Narrow in proportion to.

Next, in step 189, the processing from step 191 to step 195 is repeatedly executed until the page currently being turned is completely turned. Here, the page rotation angle is calculated for each frame, and when the page rotation angle exceeds 2π, it is determined that the page has been turned over. The processing from step 191 to step 195 will be described below.

First, in step 191, the page width during turning is calculated to create a page frame, and the inside of the frame is filled with the default color or pattern. The page width is calculated according to equations 5 and 6. That is, the height is fixed, and the width is calculated from the page rotation angle δ by WP = wp * ABS (COSδ) (WP is the width of the transformed page). Where −1 ≦ C
Since OSδ ≦ 1 (0 ≦ δ ≦ π), COSδ takes an absolute value (ABS).

Next, in step 192, the processes of step 193 and step 194 are repeated for each data in the page. As described above, in this embodiment, the text data is not displayed during the page turning because the application is mainly directed to the image data.
Therefore, the processes of steps 193 and 194 are performed only on the image data.

In step 193, the original image data is thinned out to create display data. Originally, the image data should be orthographically transformed for each pixel according to the equation 5, but the data during the turning may be displayed with a fineness enough to show the atmosphere, so that the processing can be simplified. That is,
Similar to the case of the previous page, first, a frame of image data is created, and the image data is thinned out so as to fit in the data frame. The data frame is created according to the equations (5) and (6). That is, the vertical width is fixed, and the horizontal width is WP1 = wp1 from the page rotation angle δ.
* ABS (COSδ) is used for calculation (WP1 is the width of the transformed image page). As before, −1 ≦ COSδ ≦ 1
Since (0 ≦ δ ≦ π), the absolute value (AB
Take S). Further, regarding the thinning of the image data, in order to reduce the processing time, simple thinning of deleting the data in units of vertical lines may be used.

Next, at step 194, the display data is arranged so as to be displaced from a predetermined display position. First, the calculation of the display position in the horizontal direction follows Formula 5. That is, assuming that a predetermined display position of data viewed from the rotation axis is x, the display position X of data during page turning is X = x * ABS (COS
Calculate with δ). Further, according to the equation 6, it is not necessary to move the data in the vertical direction, but as described above, the illusion of the human eye causes the data to move in the vertical direction in order to make it look as if it is a projective transformation. Also, it is better to move the display position. The movement in the vertical direction is axisymmetric with respect to the center line of the page perpendicular to the rotation axis. If the given display position is in the upper half of the page, the data will move up,
If it is in the bottom half of the page, move it down. The moving distance is calculated as C * 2 * f / F on the right page and C * 2 * (F-f) / F on the left page as viewed from the rotation axis. Here, C is the maximum value of the moving distance and depends on the size of the page. Further, f represents the current frame number, and F represents the total number of frames. The reason for multiplying 2 is that the calculation of f / F and (F−f) / F is only 0.5 at the maximum. From the above calculation, it can be seen that the data movement distance in the vertical direction is maximum near the page rotation axis, and the movement distance is small at the start and end of page turning.

Finally, in step 195, step 1
By 91, the page frame is reduced, and the page hidden under the page being turned is partially displayed.

By the page turning display control processing 180, the page turning animation shown in FIG. 2 is displayed.

FIG. 13 shows another page turning animation display example according to this embodiment. The page is displayed in a two-page spread type in FIG. 2, whereas it is displayed in a one-page type in FIG. Although the animation is the same as when the left page is hidden in FIG. 2, the arrangement of data and the modification of the page and the data can be different. For example,
Display a single horizontal page, rotate the page vertically, etc. Also, FIG. 13B is modified such that the data is gradually displayed in a fragmentary manner from the original size in the direction in which the page is rotated, and the data is gradually fragmented from the original size to the original size. It has been transformed so that it will be displayed again. Numbers 1 to 8 in the figure represent data. It's more like an image that data is gradually hidden on the page being flipped, rather than an image that the page rotates. Furthermore, FIG.
In (C), in addition to the above, the data is moved to a position where the distance from the rotation axis gradually decreases from a predetermined position, and the distance from the rotation axis gradually changes from a sufficiently short distance to a predetermined position. Are moving. This is also closer to the image that the page on which the data is placed gradually moves in the turning direction rather than the image that the page rotates.

Next, the appearance and usage of the page-turning display controller according to the present invention will be described with reference to FIGS. 6, 7 and 8.

FIG. 6 shows the present apparatus implemented as a portable apparatus. The portable page-turning display control device 100 includes a bidirectional button switch 131 for page-turning operation, and an electronic pen 132 for performing page-turning operation by pointing and dragging and other editing operations.
And a flat panel display (liquid crystal display) 101 for displaying page turning animations or still images,
External storage medium 1 such as an optical disk (including CD-ROM)
It consists of 41 etc. The bidirectional button switch 131 is characterized in that it corresponds to the thickness of a book and allows the user to operate it as if turning a page while touching the thickness of the book. In addition, the external storage medium 141 is
Since it is removable (removable and removable), you can organize, save and refer to data with different themes for each medium. This device 100
Is particularly suitable for applications such as electronic catalogs for presentations at sales visits of arbitrary products.

FIG. 15 shows a configuration example of the bidirectional button switch 131. The figure shows a state in which the user is using the page turning display control device from the lateral direction. The user uses the main body 330 of the apparatus as the fulcrum 3 of the hand 335.
It is supported by 36, and the page turning is controlled while pressing the bidirectional button switch 331. Bidirectional button switch 3
31, the upper right button 331a and the lower right button 33
1b, upper left button 331c and lower right button 331d
There are four buttons (hidden behind the body 331 in FIG. 15). Note that these buttons are actual operation buttons, not the display area on the display screen described above.
An operation example when each button is pressed is as shown in FIG. That is, if you press each button once, it will turn one page,
Press and hold to continuously turn pages. In the case of continuous page turning, the page turning speed increases in proportion to the time the button is pressed. When the upper right button 331a or the lower left button 331d is pressed, page turning is performed in the forward direction, and the lower right button 331b or the upper left button 331c is performed.
Press to turn the page in the opposite direction. Therefore, the user can operate with either one hand or both hands. For example, the upper right button 331a and the lower right button 331b are used when operating with the right hand, and the upper left button 331c and the lower left button 331d are used when operating with the left hand. Further, in the operation using both hands, the upper right button 331a and the upper left button 331c can be used. In particular, the operation using both hands is similar to the feeling of turning a page while pressing the actual thickness of a book with fingers, so that the user's affinity is increased. Further, the buttons on the upper surface and the lower surface are displaced from each other so that the buttons hit the positions of the thumb and the index finger when the user puts the main body 330 on the hand 335.
As shown in the cross section 337, when pressing the button on the upper surface, the button on the lower surface protrudes outward by the amount of pressing, and conversely, when the button on the lower surface is pressed, the button on the upper surface protrudes outward by that amount. It is also possible to interlock. Instead of the bidirectional switch button, a configuration in which the jog shuttles are arranged on the left and right of the main body 330 is also possible.

FIG. 7 shows a television connection type implementation of this apparatus. In recent years, like video game consoles,
Information home appliances called set-top boxes, which give added value to televisions other than receivers, are now on the market. The TV-connection-type page-turning display control device 110 is configured such that the set-top box can turn the page. The apparatus 110 includes an external storage medium 142 such as a CD-ROM and a remote controller 133 for the user to perform page turning operations and other operations. Further, the device 110 is used by connecting to the television 111. The conventional set-top box can play back a photo CD in which the photos are burned on a CD-ROM, but has only an interface for displaying the photos one by one. The TV-connected page-turning display control device 110 can provide a new interface for displaying and enjoying pictures on the TV just as an electronic album.

FIG. 8 shows a personal computer (hereinafter,
This shows the apparatus implemented by using a PC) or a workstation (hereinafter, WS). The configuration of the PC or WS type page turning display control device is the computer main body 120.
The display 10, the mouse 134, an external storage medium 141 such as an optical disk (including a CD-ROM), a scanner device 161 for inputting data, and a printer device 162 for outputting data. In recent years, image data, moving image data, etc.
It has become widely available through M, and there is a great need for a multimedia database for managing and storing these. This device can be used as an interface for freely browsing (browsing) data in a multimedia database.

[0089]

According to the present invention, by providing the data arranging means, the page transforming means, the data transforming means, and the means for synthesizing the page and the data, the projective transformation process has been performed on the entire page image so far. On the other hand, it becomes possible to transform the page and the data within the page separately, and it is possible to reduce the amount of processing for transforming the blank area other than the area where the data is pasted within the page. Further, the process of transforming a page and data further simplifies the projective transformation process and reduces the amount of processing for generating a page turning animation. further,
The loss of the visual effect caused by simplifying the page or data transformation process from the projective transformation process is dealt with by making the data display position moving means independent from the page transformation means or the data transformation means. This induces the illusion of the human eye by moving the display position of the data according to the page turning, and minimizes the visual effects lost by simplifying the transformation process of the page and data from the projective transformation process. I'm aiming for that. As described above, it is possible to provide a page turning display control device which gives a user a visual effect similar to turning a book familiar in the real world and can be realized with an inexpensive and simple system configuration.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a basic configuration and functions of a page-turning display control device according to the present invention and a screen display example.

FIG. 2 is an explanatory diagram showing a screen display example of the page turning display control device according to the present invention.

FIG. 3 is an explanatory diagram showing the principle of page turning display according to the present invention.

FIG. 4 is an explanatory diagram of the principle of projective transformation processing according to the present invention.

FIG. 5 is an explanatory diagram showing a relationship between a page rotation speed and a page and data change rate according to the present invention.

FIG. 6 is an explanatory diagram showing an appearance of a page turning display control device according to an embodiment of the present invention.

FIG. 7 is an explanatory diagram showing another appearance of the page turning display control device according to the embodiment of the present invention.

FIG. 8 is an explanatory diagram showing another external appearance of the page turning display control device according to the embodiment of the present invention.

FIG. 9 is an explanatory diagram showing a hardware configuration of a page turning display control device according to an embodiment of the present invention.

FIG. 10 is a process flow chart showing a page turning process of the page turning display control device according to the embodiment of the present invention.

FIG. 11 is an explanatory diagram showing an operation example of page turning processing by a book thickness button according to an embodiment of the present invention.

FIG. 12 is an explanatory diagram showing an operation example of page jump processing by a book thickness button according to an embodiment of the present invention.

FIG. 13 is an explanatory diagram showing another screen display example of the page turning display control device according to the present invention.

FIG. 14 is an explanatory diagram showing a representative example of page turning display in the conventional technique.

15 is an explanatory diagram of a configuration and an operation example of the bidirectional button switch shown in FIG.

[Explanation of symbols]

1 ... Light source, 2 ... Projection plane, 3 ... Page, 4 ... Projected page, 10 ... Display, 12 ... Book thickness button,
13 ... page thickness button, 14-17 ... page, 20
~ 27 ... image data, 30 ~ 34 ... text data, 5
0 ... Page turning control section, 51 ... Page turning speed detecting means, 52 ... Page rotation speed setting means, 60 ... Page generating section, 61 ... Data arranging means, 70 ... Page turning animation generating section, 71 ... Page transforming means, 72 ... data transforming means, 73 ... data display position moving means, 74 ... page and data combining means, 80 ... page turning display section,
90 ... Work area, 91 ... Data group and each display position currently displayed, 92 ... Data group and each display position to be displayed next,
100 ... Portable page turning display control device, 110 ... Television connection type page turning display control device, 120 ... PC or WS type page turning display control device, 130 ... Input means, 140 ... Data storage unit

Claims (15)

[Claims] 1. A device for displaying data in a page unit on a display device in the form of a book and displaying an animation for rotating the page when turning the page, wherein the data is arranged at a predetermined position in the page. Data arranging means, storage means having a work area for temporarily holding the currently displayed data and the next displayed data together with the display position within the page, and the page being turned is deformed according to a predetermined rotation speed. A page transforming means for transforming the data in the page being turned according to the rotation speed, and a data transforming means for transforming the data in the page being turned according to the rotation speed from the predetermined position. Data display position moving means to be moved automatically, and the page and data being flipped are combined preferentially with the still page and data. Page turning display control device is characterized by providing a stage. 2. The page transforming means transforms the page so that the page is gradually reduced from its original size in the direction in which the page rotates, and then the page is gradually reduced from its original size to its original size. The page-turning display control device according to claim 1, wherein the page-turning display control device is modified so as to be enlarged and displayed. 3. The data arranging means arranges the data in two pages displayed in a two-page spread type, and the page deforming means arranges the page in a direction in which the page rotates until the rotation of the page exceeds a rotation axis. It is characterized in that it is transformed so as to gradually reduce the size of and, and when the page rotation exceeds the rotation axis, it is gradually transformed to the original size from the sufficiently reduced page. The page turning display control device according to claim 2. 4. The data arranging means arranges data within one page displayed in a one-page type, and the page transforming means stores the original page in the direction in which the page rotates in the case of forward page turning. 3. The size is changed so as to be gradually reduced, and in the case of reverse page turning, the page is changed so as to be gradually enlarged and displayed from the sufficiently reduced page to the original size. Page turning display controller. 5. The data transformation means transforms the data so that the data is gradually reduced from the original size in the direction in which the page is rotated, and then gradually reduced from the sufficiently reduced data to the original size. The data display position moving means moves the data to a position where the distance from the rotation axis gradually decreases from the predetermined position in the direction in which the page is rotated, and then the data is moved from the rotation axis. 5. The page turning display control device according to claim 2, wherein the position is gradually moved from a position having a sufficiently short distance to the predetermined position. 6. The rate of change for reducing the page from its original size and the rate of change for expanding the page to its original size by the page transforming means, and the data transforming means for shrinking the data from its original size. The rate of change and the rate of change that expands to the original size,
The rate of change of the distance by which the data display position moving means moves data from the predetermined position in the rotation axis direction and the rate of change of the distance by which the data is moved from the rotation axis direction to the predetermined position are equal. Item 5. A page turning display control device according to item 5. 7. The data display position moving means moves the data in the vertical direction as well as the direction in which the page rotates so that the distance from the vertical center line of the page gradually increases from the predetermined position. 7. The page turning display control device according to claim 5, wherein the data is moved to a predetermined position and then gradually moved from a position having a sufficiently long distance from the center line to the predetermined position. 8. The distance by which the data display position moving means moves data from the predetermined position in the vertical direction and the distance by which the data is moved to the predetermined position are an angle formed by a rotating page and a stationary page. 8. The page turning display control device according to claim 7, which is proportional to 9. The data transforming means transforms the data so that the data is gradually and fragmentally displayed from the original size in the direction in which the page rotates, and then the page is rotated from the sufficiently fragmentary data to the original size. The page-turning display control device according to any one of claims 2 to 4, wherein the page-turning display control device is modified so that it is gradually returned to the display. 10. The data display position moving means moves the data to a position where the distance from the rotation axis gradually decreases from the predetermined position, and then from the position where the distance from the rotation axis is sufficiently short. The page turning display control device according to claim 9, wherein the page turning display control device is gradually moved to a predetermined position. 11. The page turning display control device according to claim 1, wherein when turning a page on which text data is placed, the text data is not displayed during turning. 12. The timing for reading the data to be displayed next into the work area of the storage means is just before the start of turning the currently displayed page.
11. The page turning display control device according to any one of 1 to 11. 13. A page turning speed detecting means for detecting a page turning speed requested by a user, and a page turning speed setting means for setting the predetermined turning speed from the page turning speed. The page-turning display control device according to claim 1. 14. The page turning display control device according to claim 13, wherein the page turning speed setting means sets the page turning speed in proportion to the page turning speed requested by the user. 15. A display control method for displaying data in a book form on a page unit on a display device, and displaying an animation for rotating the page when turning the page. The data in the page is projectively transformed only in the page turning direction according to the rotation angle of the page, and the shape of the page being turned and the data in the page facing the front are transformed according to the result of this projective transformation. And are sequentially reduced and enlarged only in the page-turning direction as the page is turned, and the position of the data in the page facing the front is moved in the direction approaching the rotation axis along with the reduction, and is perpendicular to this. , The upper half and the lower half of the page are moved away from each other in the direction of, and with the enlargement, they are moved away from the rotation axis and the direction perpendicular to this. Page turning display control method, characterized in that upper and lower halves of the page moves towards each other in.