JP2006202106A - Display apparatus, and method for enlarging/reducing image - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a user to easily enlarge or reduce a displayed image by his (or her) intuitive operation. <P>SOLUTION: A control bar for controlling a position in displaying an enlarged/reduced image is provided with a function for changing a enlargement/contraction ratio by dragging a prescribed side of the bar. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display device and an image enlargement / reduction method.

  Conventionally, personal computers have a function of enlarging and displaying a part of an image displayed in a window.

  For example, there is a method in which an enlarge button is displayed on the screen, and when the enlarge button is clicked with a pointing device such as a mouse, the image in the window is enlarged and displayed at a constant magnification. Alternatively, after clicking the enlarge button, an area on the screen is selected by operating the mouse, and the selected area is enlarged and displayed.

  Also, as a method for adjusting the display position in the state of performing the enlarged display, for example, a method of displaying a scroll bar and moving the display position by operating the scroll bar with a pointing device is used. well known.

  For example, a rectangular scroll bar for adjusting the vertical display position of the image near the left edge of the screen, and similarly for adjusting the horizontal display position of the image near the lower edge of the screen. Displays a rectangular scroll bar. The scroll bar for adjusting the vertical direction can be moved in the vertical direction by dragging the pointing device. Similarly, the scroll bar for adjusting the horizontal direction can be moved in the horizontal direction by dragging the pointing device. ing. When the scroll bar is moved by dragging the scroll bar with the pointing device, the moving amount of the image is calculated from the moved position, and the position of the image display is changed.

  Another method of adjusting the display position is to display a reduced image of the entire screen on a part of the screen and enclose the part currently enlarged on the screen with a rectangle or the like to display the display range. The method of indicating is also conventionally performed. At this time, a process of changing the display position by dragging a rectangle indicating the display area in the reduced screen has also been performed.

As another conventional example, Patent Document 1 can be cited.
JP 2002-140112 A

  First, since the operation using the scroll bar is for moving the image display position, the enlargement ratio of the image display cannot be changed. Conventionally, when changing the enlargement ratio of an image in an enlarged display state using a scroll bar, for example, displaying a zoom-in or zoom-out button and clicking the pointing device to change the enlargement ratio at a certain ratio. Had gone. However, when changing the enlargement ratio using the zoom-in and zoom-out buttons, the change in the enlargement ratio in one operation is set to be relatively large so that the enlargement ratio can be changed as much as possible with a few operations. Therefore, this method cannot finely adjust the enlargement ratio. In order to finely adjust the enlargement ratio, it may be necessary to redo the enlargement operation from the beginning.

  Further, the method of displaying a reduced image of the entire image on a part of the screen has a drawback that a part of the screen is hidden by the reduced image. In the case of a scroll bar, the background image can be recognized by making the bar itself semi-transparent, for example. However, in the case of a reduced image, it becomes difficult to distinguish the image from the background image. It cannot be processed.

  In order to solve the above-described problem, according to the first aspect of the present invention, in the display device having the instruction means for indicating the position on the screen and having the function of enlarging the display image, the image is enlarged and displayed. Is started, first control means having first and second objects for controlling the enlarged display state in the vertical direction, and third and fourth for controlling the enlarged display state in the horizontal direction. The second control means having the object is displayed on the screen, and when the first object is dragged by the instruction means, the display position of the first object is changed, and the first object is changed. The image enlargement ratio and the image display position are calculated from the display position to change the enlarged display state, the display positions of the third and fourth display objects are calculated from the image enlargement ratio, and the second control is performed. The display position of the second object is changed, and when the second object is dragged by the instruction means, the display position of the second object is changed, and the image is enlarged from the display position of the second object. Calculating the rate and the image display position to change the enlarged display state, calculating the display positions of the third and fourth display objects from the image enlargement rate, changing the display position of the second control means, Further, when the third object is dragged by the instruction means, the display position of the third object is changed, and the image enlargement ratio and the image display position are calculated from the display position of the third object. The display position of the first control means is calculated from the image enlargement ratio, the display positions of the first and second display objects are calculated, and the display position of the first control means is changed. Further, when the fourth object is dragged by the instruction means, the display position of the fourth object is changed, and the image enlargement ratio and the image display position are calculated from the display position of the fourth object. Then, the enlarged display state is changed, the display positions of the first and second display objects are calculated from the image enlargement ratio, and the display position of the first control means is changed.

  As described above, in the present invention, the function of changing the enlargement ratio by dragging a specific side of the bar is included in the adjustment bar for adjusting the position when the image is enlarged and displayed. As a result, the user can easily enlarge or reduce the display image by an intuitive operation. In particular, it is possible to make fine adjustment by slightly changing the enlargement ratio of the display image, which has been difficult until now, and the usability can be greatly improved.

  In addition, when dragging one side of the adjustment bar, if the side position exceeds the specified range, the opposite side is automatically moved to change the magnification, or one side Usability can be further improved by performing a process of automatically moving the opposite side at the same time as dragging.

(First embodiment)
A first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing the configuration of the first exemplary embodiment of the present invention, and FIG. 2 is a block diagram showing a part of the internal configuration of the display device 101.

  The display device 101 is a display device that displays an image of a personal computer and an image of a video device such as a video deck or a DVD player on a screen.

  In the display device 101, an optical system including a light source lamp, a color filter, a liquid crystal panel, an optical lens, a mirror, and the like is configured. The light generated by the light source lamp is separated into three colors of RGB by a color filter or the like, and is irradiated on each of the liquid crystal panels. Here, the number of pixels of each liquid crystal panel is assumed to have 1024 pixels in the horizontal direction and 768 pixels in the vertical direction. The light modulated by the liquid crystal panel is enlarged and projected on the screen of the display device 101 by the projection optical system to display an image.

  The display device 101 is connected to the personal computer 104 by an image signal cable 105 and an audio signal cable 106. The image signal cable 105 and the audio signal cable 106 are connected to the image connector 203 and the audio connector 204, respectively. The input image signal and audio signal are input to the image / audio processing unit 205.

  In the image / sound processor 205, first, the input RGB image signal is A / D converted to a digital value. Next, each processing necessary for properly displaying an image on the liquid crystal panel 206 is performed. For example, when the number of pixels of the input image signal is different from the number of pixels of the liquid crystal panel 206, resolution conversion is performed to match the number of pixels. In addition, necessary image quality adjustments such as timing adjustment of input image signals, gamma conversion, contrast, and brightness adjustment are performed. The image / sound processor 205 generates and outputs the adjusted image signal and various drive pulses for driving the liquid crystal panel 206. The image signal and driving pulse are input to the liquid crystal panel 206 to form an image on the panel.

  The sound is adjusted in sound quality such as high and low levels in the image / sound processing unit 205 and input to the sound output unit 207. The audio output unit 207 includes an amplifier, a speaker, and the like, and audio is output from the speaker arranged inside the display device 101.

  Reference numerals 102 and 103 denote digitizer modules installed on the left and right of the upper part of the screen. In this digitizer system, infrared rays are transmitted from the digitizer modules 102 and 103 to scan the surface of the screen. If there is an obstacle on the screen, the transmitted infrared ray is blocked and the level of the received signal changes. Therefore, for example, when a certain position on the screen is pointed with a finger or a pointing stick, the position and size can be detected from the level change of the received signal.

  The signals detected by the digitizer modules 102 and 103 are received by the digitizer reception processing unit 202. The digitizer reception processing unit 202 converts the received signals from the digitizer modules 102 and 103 into pointing position data and transmits the pointing position data to the system control unit 201. At this time, the pointing position data is (0, 0) when the upper left pixel on the screen is pointed, (1023, 0) at the upper right end, (1023, 767) at the lower right end, and so on. The adjustment is made in advance so that the value is calculated in a one-to-one correspondence with the pixels on the screen.

  The display device 101 includes operation buttons 107 for performing power on / off, channel operation, and the like. The system control unit 201 monitors the pressed state of each button, and executes each process when detecting the pressing of any button.

  The display device 101 has a function of performing an enlarged display of a display image using an enlarged display processing function of the image / sound processing unit 205.

  One of the operation buttons 107 is a zoom button for performing a partial enlargement display on the screen, and the system control unit 201 starts an enlargement display process when detecting that the user presses the zoom button. A flowchart of the enlarged display process is shown in FIG. 3, and the process will be described.

  As the initial state of the enlarged display, the screen is fixed at the center of the screen and enlarged by a factor of 1.5. Here, assuming that the center coordinates of the enlarged display are (Xc, Yc) and the enlargement ratio is Z [times], Xc = 512, Yc = 384, and Z = 1.5.

  First, in S302, the enlargement ratio Z is set to 1.5. Next, the horizontal start position Xofs and the vertical start position Yofs of the area to be enlarged and displayed in the entire image are calculated. Xofs and Yofs can be calculated from Xc, Yc, and Z as follows.

Xofs = Xc-1024 / Z / 2 = Xc-512 / Z
Yofs = Yc−768 / Z / 2 = Yc−384 / Z (1)
Substituting Xc = 512, Yc = 384, and Z = 1.5 into equation (1),
Xofs = 171
Yofs = 128 (2)
The system control unit 201 executes the enlarged display by setting the Xofs, Youfs, and Z for the image / sound processing unit 205.

  Next, in the enlarged display state, as shown in FIG. 4, a horizontal adjustment bar 401, a horizontal reference bar 402, a vertical adjustment bar 403, and a vertical reference bar 404 for adjusting the display position are displayed. . For the display of each bar, the system control unit 201 designates display coordinates, color, overlay order, and the like to the OSD (on-screen display) generation unit 208. In S303, the coordinates of the horizontal direction adjustment bar 401, the horizontal direction reference bar 402, the vertical direction adjustment bar 403, and the vertical direction reference bar 404 are calculated as follows.

First, the position of the horizontal reference bar 402 is fixed, and is a rectangular object having coordinates (256, 710) and (768, 740) as vertices. On the other hand, the horizontal direction adjustment bar 401 is also a rectangular object, and its vertices are represented as (Xs, 700) and (Xe, 750). Xs and Xe vary depending on the magnification and display position of the image,
Xs = 512 * Xofs / 1024 + 256
Xe = Xs + 512 / Z (3)
And can be calculated.

The position of the vertical reference bar 404 is also fixed, and is a rectangular object whose coordinates are (960, 128) and (990, 640). The vertex of the vertical adjustment bar 403 is a rectangular object of (950, Ys) and (1000, Ye). Ys and Ye vary depending on the magnification and display position of the image,
Ys = 512 * Yofs / 768 + 128
Ye = Ys + 512 / Z (4)
And can be calculated.

  The system control unit 201 calculates the vertex coordinates of the horizontal direction adjustment bar 401 and the vertical direction adjustment bar 403 from Expressions (3) and (4).

Xs = 341
Xe = 683
Ys = 213
Ye = 555 (5)
It becomes. The system control unit 201 sets the calculated coordinate values for the OSD generation unit 208.

  A signal for displaying each bar is output from the OSD generation unit 208 in accordance with the setting, and is superimposed on the image in the image / sound processing unit 205. As a result, each bar as shown in FIG. 4 is displayed.

In step S <b> 304, it is determined whether dragging has been performed inside the horizontal direction adjustment bar 401 or the vertical direction adjustment bar 403. For example, it is assumed that a drag is performed in the right direction after the inside of the horizontal direction adjustment bar 401 is pointed with the pen 405, and the drag amount in the right direction becomes 50 on the coordinates. If it is determined that the drag has been made, the process proceeds to S305 to change the coordinates of the necessary adjustment bar. Here, since it is a drag of the horizontal adjustment bar 401, Xs and Xe are changed. Since the amount of change in coordinates is 50 to the right,
Xs = 341 + 50 = 391
Xe = 683 + 50 = 733 (6)
It becomes. The changed Xs and Xe are set in the OSD generation unit 208, and the display of the horizontal adjustment bar 401 is updated.

In step S306, the image display start position is changed. Here, since the movement is in the horizontal direction, Xofs which is the horizontal start position of the image display is calculated. When equation (3) is transformed,
Xofs = (Xs-256) * 1024/512 (7)
Substituting Xs = 391,
Xofs = 270 (8)
The system control unit 201 sets the changed Xofs for the image / sound processing unit 205 and updates the enlarged display state. As a result of the above processing, an operation is realized in which the image moves to the left in accordance with the dragging in the right direction, and the image that has been outside the right end of the screen so far enters the screen. Although detailed description of dragging in the left direction and dragging of the vertical direction adjustment bar 403 is omitted, the display image can be moved up, down, left, and right by the same processing.

  Next, it is assumed that, from the state of FIG. 4, the upper side of the vertical direction adjustment bar 403 is pointed and then dragged downward to the position where the vertical direction coordinate is 299. If dragging of the upper side of the vertical direction adjustment bar 403 is determined in S307, the process proceeds to S308, and Z, Xofs, and Yofs are calculated. First, the system control unit 201 updates Ys = 299, and calculates Yofs and Z from the updated Ys.

When equation (4) is transformed,
Yofs = (Ys−128) * 768/512
Z = 512 / (Ye−Ys) (9)
Therefore, if Ys = 299,
Yofs = 256
Z = 2.0 (10)
It becomes.

At the same time, the horizontal display start position is corrected in order to maintain the aspect ratio of the screen display. From equation (1)
Xofs = Xc−512 / Z = 256 (11)
The system control unit 201 sets Z, Yofs, and Xofs calculated above for the image / sound processing unit 205, and changes the enlarged display state.

In step S309, Xs and Xe are changed in accordance with the change in the horizontal display position. From equation (3)
Xs = 512 * Xofs / 1024 + 256 = 384
Xe = Xs + 512 / Z = 640 (12)
It becomes. The system control unit 201 sets the calculated coordinate value of each bar to the OSD generation unit 208, and displays an appropriate horizontal direction adjustment bar 401 and vertical direction adjustment bar 403.

  As a result of the above processing, the display state of the screen changes as shown in FIGS. In FIG. 4, the length of the vertical direction adjustment bar 403 is 2/3 of the length of the vertical direction reference bar 404. However, by dragging the upper side of the vertical direction adjustment bar 403 downward, in FIG. The length of the vertical adjustment bar 503 has been changed to ½ of the length of the vertical reference bar 504. At this time, the position of the lower side of the vertical adjustment bar 503 is fixed. As a result, the screen display state changed from 1.5 times to 2.0 times with respect to the lower end of the screen. At this time, the magnification in the horizontal position is changed with the center as a reference.

  Here, when the drag position reaches the lower side of the vertical adjustment bar 503, that is, when Ys reaches Ye, even if dragging further downward, Ys = Ye is fixed.

  Also, when the upper side of the vertical direction adjustment bar 503 is dragged upward, Z, Yofs, and Xofs are calculated by the equations (9) and (11) to change the enlarged display state. In the case of dragging in the upward direction, the enlargement ratio Z is in the decreasing direction. That is, the display image can be reduced. Here, when the drag position reaches the upper side of the vertical reference bar 504 and the drag is performed further upward, Ys = 128, that is, the position of the upper side coordinate of the vertical reference bar 504 is fixed.

  The same processing is performed when dragging the lower side of the vertical adjustment bar 503 and dragging the left side or right side of the horizontal direction adjustment bar 501. That is, when the lower side of the vertical direction adjustment bar 503 is dragged, the enlargement ratio can be changed with the upper end of the display image fixed. Also, dragging the left side of the horizontal direction adjustment bar 501 changes the enlargement ratio with the right edge of the display image fixed, and dragging the right side of the horizontal direction adjustment bar 501 changes the magnification ratio with the left edge of the display image fixed. Each can be done.

  If the system control unit 201 detects that the zoom button is pressed during enlarged display, the system control unit 201 determines that the zoom button is pressed in S310, and proceeds to S311 to delete each adjustment bar. Next, in S312, the image / sound processing unit 205 is set to cancel the enlarged display and is switched to the display of the entire image. Then, the process reaches S313 and the enlarged display process is terminated.

(Second Embodiment)
In the first embodiment, for example, when the upper side of the vertical direction adjustment bar 403 is dragged and the drag position exceeds the upper side of the vertical direction reference bar 404, Ys indicates the upper side position of the vertical direction reference bar 404. There was a limit that would not be exceeded. Another embodiment regarding the processing in this case will be described.

  In the display state of FIG. 5, Ys = 299. From this state, it is assumed that the pen 505 has now dragged the lower side of the vertical direction adjustment bar 503 to exceed the lower side of the vertical direction reference bar 504 and the vertical coordinate becomes 725. At this time, first, Ye is fixed to 640 which is the lower side coordinate of the vertical direction reference bar 504. Next, Ys is changed as follows.

Ys = 299- (725-640) = 214 (13)
That is, a process of subtracting the difference between the vertical coordinate of the drag position and the lower side coordinate of the vertical reference bar 404 from Ys before the change is performed.

From Ys and Ye, using formula (9) and formula (11),
Yofs = (Ys−128) * 768/512 = 128
Z = 512 / (Ye-Ys) = 1.2
Xofs = Xc−512 / Z = 85 (14)
Is calculated.

Further, Xs and Xe are changed in accordance with the change of the display position in the horizontal direction. From equation (3)
Xs = 512 * Xofs / 1024 + 256 = 299
Xe = Xs + 512 / Z = 725 (15)
The system control unit 201 sets the Z, Yofs, and Xofs calculated above for the image / sound processing unit 205. Also, the calculated coordinate value of each bar is set in the OSD generation unit 208, and the enlarged display state is changed. The display state at this time is shown in FIG. The lower side of the vertical direction adjustment bar 603 coincides with the lower side of the vertical direction reference bar 604. On the other hand, the upper side of the vertical adjustment bar 603 extends upward by the amount that the pen 605 exceeds the lower end of the vertical reference bar 604.

  Although not described in detail, the same processing is performed when dragging the upper side of the vertical direction adjustment bar 503 and dragging the left side or right side of the horizontal direction adjustment bar 501. That is, when the upper side of the vertical direction adjustment bar 503 is dragged to reach the upper side of the vertical direction reference bar 504, the lower side of the vertical direction adjustment bar 503 is extended downward. The same applies to the horizontal adjustment bar 501.

(Third embodiment)
Still another embodiment will be described with respect to processing when each side of the adjustment bar is dragged.

  In the state of FIG. 5, Ys = 299 and Ye = 555. From the state of FIG. 5, the top side of the vertical adjustment bar 503 is dragged with the pen 505. It is assumed that dragging has been performed to a position where the vertical coordinate is 213.

At this time, the system control unit 201 sets Ys to the drag position 213 and simultaneously moves Ye in the reverse direction by an amount equal to the drag amount in the vertical direction. That is,
Ys = 213
Ye = 555 + (299-213) = 640 (16)
And

From Ys and Ye, using formula (9) and formula (11),
Yofs = (Ys−128) * 768/512 = 128
Z = 512 / (Ye-Ys) = 1.2
Xofs = Xc−512 / Z = 85 (17)
Is calculated.

Further, Xs and Xe are changed in accordance with the change of the display position in the horizontal direction. From equation (3)
Xs = 512 * Xofs / 1024 + 256 = 299
Xe = Xs + 512 / Z = 725 (18)
The system control unit 201 sets the Z, Yofs, and Xofs calculated above for the image / sound processing unit 205. Also, the calculated coordinate value of each bar is set in the OSD generation unit 208, and the enlarged display state is changed. The display result at this time is also as shown in FIG. With the above processing, an operation of enlarging or reducing the image with the center of the screen fixed can be realized by simultaneously moving the opposite side in the opposite direction when dragging one side. Although not described in detail, the same applies when dragging the lower side of the vertical adjustment bar 503 and dragging the left side or right side of the horizontal direction adjustment bar 501.

It is a figure showing the structure of the 1st Embodiment of this invention. 3 is a block diagram illustrating a part of the internal configuration of the display apparatus 101. FIG. It is a flowchart of an enlarged display process. It is a figure which shows the screen state of an enlarged display process. It is a figure which shows the screen state of an enlarged display process. It is a figure which shows the screen state of an enlarged display process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Display apparatus 102 Digitizer module 103 Digitizer module 104 Personal computer 105 Image signal cable 106 Audio signal cable 107 Operation button 201 System control unit 202 Digitizer reception processing unit 203 Image connector 204 Audio connector 205 Image / audio processing unit 206 Liquid crystal panel 207 Audio output Part 208 OSD generation part

Claims (8)

In a display device having an instruction means for indicating a position on the screen and having a function of enlarging a display image, when enlarged image display is started,
First control means having first and second objects for controlling the vertical enlarged display state;
A second control means having third and fourth objects for controlling the horizontal enlarged display state is displayed on the screen;
When the first object is dragged by the instruction means,
Changing the display position of the first object, calculating the image enlargement ratio and the image display position from the display position of the first object, and changing the enlarged display state;
Calculating the display positions of the third and fourth display objects from the image magnification, and changing the display position of the second control means;
Further, when the second object is dragged by the instruction means,
Changing the display position of the second object, calculating the image enlargement ratio and the image display position from the display position of the second object, and changing the enlarged display state;
Calculating the display positions of the third and fourth display objects from the image magnification, and changing the display position of the second control means;
Further, when the third object is dragged by the instruction means,
Changing the display position of the third object, calculating the image enlargement ratio and the image display position from the display position of the third object, and changing the enlarged display state;
Calculating the display positions of the first and second display objects from the image magnification, and changing the display position of the first control means;
When the fourth object is dragged by the instruction unit,
Changing the display position of the fourth object, calculating the image enlargement ratio and the image display position from the display position of the fourth object, and changing the enlarged display state;
A display device that calculates display positions of the first and second display objects from the image enlargement ratio and changes a display position of the first control means. The first and second control means have a rectangular shape,
The first object is an upper side of the first control means;
The second object is a lower side of the first control means;
The third object is a left side of the second control means;
The display device according to claim 1, wherein the fourth object is a right side of the second control unit. When the drag position by the instruction means exceeds the movement range of the first object,
Calculating the position of the second object from the drag position and the position of the first object;
Further, when the drag position by the instruction means exceeds the movement range of the second object,
Calculating the position of the first object from the drag position and the position of the second object;
Further, when the drag position by the instruction means exceeds the movement range of the third object,
Calculating the position of the fourth object from the drag position and the position of the third object;
Further, when the drag position by the instruction means exceeds the moving range of the fourth object,
The display device according to claim 1, wherein the position of the third object is calculated from the drag position and the position of the fourth object. When the first object is dragged by the instruction means,
Calculating the position of the second object from the position of the first object;
Further, when the second object is dragged by the instruction means,
Calculating the position of the first object from the position of the second object;
Further, when the third object is dragged by the instruction means,
Calculating the position of the fourth object from the position of the third object;
When the fourth object is dragged by the instruction unit,
4. The display device according to claim 1, wherein the position of the third object is calculated from the position of the fourth object. 5. A method for enlarging and reducing images,
First control means having first and second objects for controlling the vertical enlarged display state;
Displaying on the screen a second control means having third and fourth objects for controlling the horizontal enlarged display state;
When the first object is dragged,
Changing the display position of the first object;
Calculating an image enlargement ratio and an image display position from the display position of the first object and changing the enlarged display state;
Calculating display positions of the third and fourth display objects from the image enlargement ratio;
Changing the display position of the second control means;
Further, when the second object is dragged by the instruction means,
Changing the display position of the second object;
Calculating an image enlargement ratio and an image display position from the display position of the second object and changing the enlarged display state;
Calculating display positions of the third and fourth display objects from the image enlargement ratio;
Changing the display position of the second control means;
Further, when the third object is dragged by the instruction means,
Changing the display position of the third object;
Calculating an image enlargement ratio and an image display position from the display position of the third object and changing the enlarged display state;
Calculating display positions of the first and second display objects from the image enlargement ratio;
Changing the display position of the first control means;
When the fourth object is dragged by the instruction unit,
Changing the display position of the fourth object;
Calculating an image enlargement ratio and an image display position from the display position of the fourth object and changing the enlarged display state;
Calculating display positions of the first and second display objects from the image enlargement ratio;
And a step of changing a display position of the first control means. The shape of the front first and second control means is rectangular,
The first object is an upper side of the first control means;
The second object is a lower side of the first control means;
The third object is a left side of the second control means;
The image scaling method according to claim 5, wherein the fourth object is a right side of the second control means. When the drag position by the instruction means exceeds the movement range of the first object,
Calculating the position of the second object from the drag position and the position of the first object;
Further, when the drag position by the instruction means exceeds the movement range of the second object,
Calculating the position of the first object from the drag position and the position of the second object;
Further, when the drag position by the instruction means exceeds the movement range of the third object,
Calculating the position of the fourth object from the drag position and the position of the third object;
Further, when the drag position by the instruction means exceeds the moving range of the fourth object,
The image scaling method according to claim 5 or 6, wherein the position of the third object is calculated from the drag position and the position of the fourth object. When the first object is dragged by the instruction means,
Calculating the position of the second object from the position of the first object;
Further, when the second object is dragged by the instruction means,
Calculating the position of the first object from the position of the second object;
Further, when the third object is dragged by the instruction means,
Calculating the position of the fourth object from the position of the third object;
When the fourth object is dragged by the instruction unit,
The image scaling method according to claim 5, wherein the position of the third object is calculated from the position of the fourth object.

Images