JP6198459B2 - Display control device, display control device control method, program, and storage medium - Google Patents

Description

  The present invention relates to a display control apparatus that performs an enlargement process of an image displayed on a display screen.

  Some devices such as smartphones and some digital cameras are equipped with a touch panel in which a display serving as a display screen and a touch pad are integrally formed. In such an apparatus, an image such as a photograph can be displayed on the display of the touch panel, and a part of the image can be enlarged to confirm the image. For example, in the case of a digital camera, a dedicated display screen (hereinafter referred to as a “focus confirmation screen”) for confirming the focus such as the blurring of the subject or the focus is used, thereby enlarging the photograph. There is. In the focus confirmation screen, it is desirable that a photograph can be enlarged and displayed accurately and quickly with a position as intended by the user as a reference (enlargement center). For this reason, there is a great need for users to improve the operability of image enlargement by a touch operation.

Image enlargement / reduction is performed by, for example, a GUI (Graphical for image enlargement / reduction) in the display screen.
This is done by displaying a (User Interface) button and touching it. In this case, since a part of the image is hidden by the GUI button, the image browsing property is deteriorated. Therefore, there is a method for enlarging / reducing an image by a touch operation on the display screen without displaying a GUI button.

Patent Document 1 discloses an invention that sets a center point and a magnification for enlarging or reducing an image based on a single locus when the touch position on the display screen moves. For example, the image is enlarged by touching the display screen so as to draw an arc around the part to be enlarged. This method does not require a GUI button to be displayed, and there are fewer obstacles when viewing an image. However, it is difficult to perform an enlargement adjustment around the position intended by the user.
Patent Document 2 describes an invention in which an image is enlarged or reduced by moving the two touched fingers away or closer to each other.

JP 2010-271774 A JP 2000-163444 A

In the method of Patent Document 2, an image enlargement operation can be performed around a position intended by the user to some extent. However, since the image is enlarged with reference to the center portion between the two fingers, it is necessary to accurately position the touch positions of the two fingers when it is desired to specify and enlarge the center of the image accurately. is there. However, due to factors such as the finger touching the touch panel fluctuating, it is difficult to operate accurately so that the amount of movement of each finger is the same when the fingers are moved apart.
In addition, when enlarging the center part of the display screen regardless of the position of the finger, it is necessary to move the part that you want to center to the center of the display screen before the enlargement operation, which increases the number of operation procedures and is cumbersome .

  In order to solve the above problems, it is a main object of the present invention to provide a technique capable of easily performing an image enlargement operation with good operability.

In the display control apparatus of the present invention that solves the above problems, a position input unit that receives an input of a position with respect to a display screen displayed on the display unit, and an enlargement operation that involves input of a plurality of positions by the position input unit are performed. If, specific location based on the position of the plurality of is within the area in which display target to be enlarged by said enlargement operation is displayed within the display screen, based on the specific position, the area the specific of the display target portion before Symbol display object as unchanged before and after the enlargement to be displayed on the position display and expanded in the area of the inner, the specific location if outside the area , with reference to the center of the area, to display the display target portion before Symbol display object as unchanged before and after expansion, which is displayed at the center of the area to expand in the area It characterized by having a display control means for controlling so.

  According to the present invention, it is possible to easily enlarge an image based on a position designated by the user and enlarge an image based on the center position of the display area. Therefore, both intuitive image enlargement and accurate image enlargement can be achieved, and the operability of the enlargement operation can be improved.

1 is an external view of a digital camera. The hardware block diagram of a digital camera. The flowchart showing the flow of a process from starting to completion | finish of a digital camera. It is an illustration figure of a focus confirmation screen, (a) is a figure showing a normal display state, (b), (c) is a figure showing the display state at the time of carrying out enlarged display. The flowchart showing the flow of a reproduction | regeneration mode process. The flowchart showing the flow of an enlargement / reduction process. 10 is another flowchart showing the flow of enlargement / reduction processing.

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

FIG. 1 is an external view of a digital camera 100 equipped with the display control apparatus of this embodiment.
The display unit 28 has a display screen (display) for displaying images such as photographs and various information necessary for photographing. The display unit 28 includes a touch panel in which a display screen and a touch pad are integrally formed, and can detect a touch operation on the display screen.

  The shutter button 61 is an input device for shooting instructions. The user performs shooting by pressing the shutter button 61. The shutter button 61 generates a first shutter switch signal by so-called half-pressing. In response to the first shutter switch signal, the digital camera 100 starts a shooting preparation operation. Shooting preparation operations include AF (autofocus) processing, AE (automatic exposure) processing, AWB (auto white balance) processing, and EF (flash pre-flash) processing. The shutter button 61 generates a second shutter switch signal by so-called full pressing. In response to the second shutter switch signal, the digital camera 100 performs a photographing process.

  The mode dial 60 is an input device for switching various operation modes. The user operates the mode dial 60 to set various operation modes. For example, the mode dial 60 can be switched between a shooting mode in which still images and moving images can be shot and a playback mode in which the shot image data is displayed on the display unit 28.

The operation unit 70 includes operation members such as a control wheel 73 that receives various operations from the user, various switches, buttons, and a touch panel.
Each operation member of the operation unit 70 is appropriately operated for each scene by selecting and operating various function icons displayed on the display unit 28, and serves as various function buttons. Examples of the function buttons include a menu button, an end button, a return button, an image advance button, a jump button, a narrowing button, and an attribute change button. For example, when a menu button is pressed, various setting menu screens are displayed on the display unit 28. The user can make various settings intuitively using the menu screen displayed on the display unit 28, the four-way button, and the SET button.
The control wheel 73 is an operation member that can be rotated, and is used when a selection item is designated together with a direction button.

The connector 112 connects the connection cable 111 for performing data communication with an external device and the digital camera 100.
The power switch 72 switches the power of the digital camera 100 on and off.
The recording medium slot 201 stores a recording medium 200 such as a memory card or a hard disk. The recording medium 200 stored in the recording medium slot 201 can communicate with the digital camera 100. The recording medium slot 201 includes a lid 202 that prevents the recording medium 200 from falling off.

FIG. 2 is a hardware configuration diagram of the digital camera 100.
An imaging system is configured by the imaging lens 103 including a focus lens, the shutter 101 having a diaphragm function, and the imaging unit 22 including a CCD or a CMOS element that converts an optical image into an electrical signal. The photographing lens 103 is covered with a barrier 102 to prevent the photographing system from being soiled or damaged.
The digital camera 100 is a computer provided with such a photographing system and the like, and the following functional blocks are formed by executing a program described later.

The A / D converter 23 converts an analog signal that is an electrical signal of an optical image output from the imaging unit 22 into image data of a digital signal.
The image processing unit 24 performs resizing processing such as pixel interpolation and reduction and color conversion processing on the image data output from the A / D converter 23 and the image data from the memory control unit 15. The image processing unit 24 performs predetermined calculation processing using the captured image data, and the system control unit 50 performs exposure control and distance measurement control based on the calculation result. Thus, TTL (through the lens) AF processing, AE processing, and EF processing are performed.

  The memory 32 stores the image data output from the A / D converter 23. The memory 32 has a storage capacity sufficient to store a predetermined number of still images, a moving image and sound for a predetermined time. The memory 32 has a storage area (video memory) for storing image data for image display. The D / A converter 13 converts the image display image data stored in the memory 32 into an analog signal and sends it to the display unit 28. As a result, the display image data written in the memory 32 is displayed on the display unit 28. The display unit 28 displays an image corresponding to the analog signal from the D / A converter 13 on the display screen. By sequentially displaying the captured image data on the display unit 28, an electronic viewfinder function (through image display) can be realized.

The nonvolatile memory 56 is an electrically erasable / recordable memory, and is configured by, for example, an EEPROM. The nonvolatile memory 56 is a computer-readable recording medium that stores constants, programs, and the like for operation of the system control unit 50.
The system control unit 50 controls the entire operation of the digital camera 100. The system control unit 50 uses a system memory 52 that is a RAM (Random Access Memory) as a work area, and executes a program read from the nonvolatile memory 56.

  The mode dial 60, the shutter button 61, and the operation unit 70 input various operation instructions to the system control unit 50 in accordance with user operations.

The power control unit 80 includes a battery detection circuit, a DC-DC converter, a switch circuit that switches a block to be energized, and the like, and detects whether or not a battery is installed, the type of battery, and the remaining battery level. Further, the power supply control unit 80 controls the DC-DC converter based on the detection result and the instruction of the system control unit 50, and supplies a necessary voltage to each unit including the recording medium 200 for a necessary period.
The power supply unit 30 includes a primary battery such as an alkaline battery or a lithium battery, a secondary battery such as a NiCd battery, a NiMH battery, or a Li battery, an AC adapter, or the like.

  The interface (I / F) 18 performs communication control for writing / reading data to / from the recording medium 200.

  In the present embodiment, the touch panel constituting the display unit 28 is also one of the operation units 70. By using the touch panel, a GUI as if the user can directly operate the display screen of the display unit 28 can be configured. As the touch panel, various types such as a resistance film method, a capacitance method, a surface acoustic wave method, an infrared method, an electromagnetic induction method, an image recognition method, and an optical sensor method can be used.

The system control unit 50 detects the following operations on the touch panel. Touching the touch panel with a finger or pen (hereinafter referred to as “touchdown”). The touch panel is touched with a finger or a pen (hereinafter referred to as “touch-on”). Moving while touching the touch panel with a finger or pen (hereinafter referred to as “move”). The finger or pen that was touching the touch panel is released (hereinafter referred to as “touch-up”). A state where nothing touches the touch panel (hereinafter referred to as “touch-off”).
The system control unit 50 recognizes these operations as events and performs processing according to each operation.

  These operations and the touch position designated by the user by touching the touch panel with a finger or pen are notified to the system control unit 50. The system control unit 50 detects what operation is performed on the touch panel based on the notification content. Regarding the move, the moving direction of the finger or pen moving on the touch panel is also detected for each vertical component / horizontal component on the touch panel based on the change in the touch position. When the touch-up is performed on the touch panel through the move from the touch-down, the system control unit 50 determines that a stroke has been drawn. The operation of drawing a stroke quickly is called “flick”. A flick is an operation of quickly moving a certain distance while touching a finger on the touch panel and then releasing it, in other words, an operation of quickly tracing a finger on the touch panel. When it is detected that the moving is performed at a predetermined speed or more over a predetermined distance and a touch-up is detected as it is, the system control unit 50 determines that a flick has been performed. Further, when it is detected that the movement is performed at a predetermined distance or more and less than a predetermined speed, it is determined that “drag” is performed. The operation of tapping one point on the display screen (press and release) is called “single touch”, and one point on the display screen is tapped twice in a certain time (press and release is repeated two sets). The operation is called “double touch”.

  The operations “flick”, “drag”, “single touch”, and “double touch” described above are operations when the finger or pen touching the touch panel is one point. The operation performed when a plurality of points are touched down on the touch panel is as follows.

  The operation of placing two fingers or a pen on the touch panel and reducing the distance between them is called “pinch-in”. Contrary to pinch-in, the operation of placing two fingers or a pen on the touch panel and widening them is called “pinch-out”. Pinch-in and pinch-out are collectively called “pinch”. In recent years, it is common to perform enlargement control of an image displayed by pinch-out and to perform reduction control of an image displayed by pinch-in. Further, a pinch state, that is, an intermediate point when two points are touched down is referred to as a “pinch center point” in the present embodiment.

  FIG. 3 is a flowchart showing the basic processing flow from the start to the end of the digital camera 100.

When the power switch 72 is pressed, the power of the digital camera 100 is turned on. After the power is turned on, the system control unit 50 first checks whether or not the operation mode set by the mode dial 60 is the shooting mode (S301).
If it is the shooting mode, the system control unit 50 performs processing of the shooting mode. The processing in the shooting mode is various processes necessary when performing still image shooting or moving image shooting (S301: Y, S302).

If it is not the shooting mode, the system control unit 50 checks whether or not the operation mode set by the mode dial 60 is the playback mode (S301: N, S303). In the reproduction mode, the system control unit 50 performs a reproduction mode process. Details of the playback mode processing will be described later (S303: Y, S304).
If the playback mode is not selected, the system control unit 50 performs other processing. The other processing includes, for example, processing in a clock display mode in which only the current time is displayed (S303: N, S305).

  When the processing in each operation mode is completed, the system control unit 50 determines whether or not shutdown is instructed by pressing the power switch 72 again (S306). If the shutdown is not instructed, the operation mode set in the mode dial 60 is confirmed again (S306: N, S301). If instructed, the power is turned off to end the operation ( S306: Y).

FIG. 4 is an exemplary view of a focus confirmation screen displayed on the display unit 28 of the digital camera 100 in the playback mode. 4A shows a display state when the image is not enlarged, and FIGS. 4B and 4C show a display state when a part of the image is enlarged. On the focus confirmation screen, an entire display area 401 and an enlarged display area 402 are provided. In the example of FIG. 4A, an entire display area 401 is provided in the upper left part of the display unit 28, and an enlarged display area 402 is provided in the lower right part of the display unit 28 so that the focus can be easily confirmed. The entire image is displayed in the entire display area 401. In the enlarged display area 402, the entire image or a part of the image is enlarged and displayed. Since the enlarged display area 402 is larger than the entire display area 401, the image in the enlarged display area 402 is displayed larger in FIG. 4A even if the same entire image is displayed. In the entire display area 401, a frame 404 that surrounds a portion corresponding to the image displayed in the enlarged display area 402 is displayed so that it can be seen which part of the entire image is displayed in the enlarged display area 402. By making such a two-screen display state, it is easy to check for image blurring and focus shift.
The display unit 28 also displays a focus confirmation screen cancel button 403 that is a GUI button for canceling the two-screen display state. When the focus confirmation screen release button 403 is touched, the normal one-screen display is restored.

FIG. 5 is a flowchart showing the flow of the playback mode process in step S304 of FIG. This process is realized by developing a program recorded in the nonvolatile memory 56 in the system memory 52 and executing it by the system control unit 50. In the initial state of this process, it is assumed that the display unit 28 is in a two-screen display state as shown in FIG.
In the playback mode, the system control unit 50 monitors events that occur due to user operations on the touch panel and other parts of the operation unit 70 (S501). When an event occurs, the system control unit 50 determines whether or not the event is a specific touch event that instructs an image scaling process (S502). In the case of a specific touch event, the system control unit 50 executes enlargement / reduction processing. Details of the enlargement / reduction processing will be described later (S502: Y, S503). The specific touch event is assumed to be single touch, double touch, or pinch.

  If it is not a specific touch event, the system control unit 50 determines whether or not the generated event is an event for ending the playback mode (S502: N, S504). If there is an event to end the playback mode, the system control unit 50 ends the processing of the playback mode. As an event for ending the reproduction mode, there are an operation for turning off the power, an operation for changing to another operation mode such as a photographing mode, and the like.

If it is not an event for ending the playback mode, the system control unit 50 determines whether the generated event is another event (S504: N, S505). If it is not another event, the system control unit 50 returns to monitoring the event (S505: N, S501).
If it is another event, the system control unit 50 performs processing according to the other event (S505: Y, S506). The processing according to other events includes image forwarding for displaying other images, image deletion, image protection, and the like. For example, when the event is a flick event in the horizontal direction, a single image feed process is performed. After the processing is completed, the system control unit 50 returns to event monitoring (S506, S501).

FIG. 6 is a flowchart showing the flow of the enlargement / reduction process in step S503 of FIG. This process is realized by developing a program recorded in the nonvolatile memory 56 in the system memory 52 and executing it by the system control unit 50.
The system control unit 50 determines whether or not the coordinate P serving as the reference position in the display screen by the specific touch event determined in step S502 of FIG. 5 is in the enlarged display area 402 (S601). The system control unit 50 determines the coordinates P as follows.
In the case of single touch, the touch position is determined as the coordinate P. In the case of double touch, the coordinate P is determined as the midpoint between the first touch position and the second touch position detected within a certain time. In the case of a pinch that detects two or more touch positions almost simultaneously, the method of determining the coordinate P differs between two points and three or more points. In the case of two points, the midpoint of the two points is determined as the coordinate P. When there are three or more points, the center point of the three points is determined as the coordinate P in order from the earliest timing at which the touch is detected. For example, when five points are touched in the order of the thumb, index finger, middle finger, ring finger, and little finger, the center point of the three points of the thumb, index finger, and middle finger is determined as the coordinate P.

  When the coordinate P is within the enlarged display area 402, the system control unit 50 performs an enlargement process (magnification process) of magnification (enlargement ratio) N on the image with the coordinate P as the enlargement center (S601: Y). , S602). Making the coordinate P the center of enlargement is a process of enlarging (magnifying) so that the position in the enlarged display area 402 of the portion of the image corresponding to the coordinate P displayed before scaling is not changed. . For example, when the point A in FIG. 4A is the coordinate P, after the image is enlarged, the position of the coordinate of the point A in the entire image (in the example shown, around the left cheek of the person positioned rightmost) ) Is displayed as shown in FIG. 4B so that it does not change before and after enlargement. The scaling factor used for enlargement is a value corresponding to the operation. If the scaling factor is larger than “1”, the zoom is enlarged, and if the scaling factor is smaller than “1”, the scaling is reduced. For example, in the case of double touch, the scaling factor is a predetermined value. Or it is good also as a value according to the distance between the touch position of the 1st time of a double touch, and the 2nd time. In the case of a pinch, the value is determined according to a change in the distance between two touched points or a change in the area surrounded by the three points.

When the coordinate P is outside the enlarged display area 402, the system control unit 50 performs an enlargement process (magnification process) based on the center of the enlarged display area 402 (S601: N, S603). Enlarging (magnifying) with the center of the enlarged display area 402 as a reference so that the position in the enlarged display area 402 of the portion of the image corresponding to the center of the enlarged display area 402 before scaling does not change (that is, This is a process of enlarging (scaling) so that it is located in the center of the area before and after scaling. For example, when point B in FIG. 4A is coordinate P, enlargement processing (magnification) is performed with the center of the enlarged display area 402 as the enlargement center as shown in FIG. The scaling factor is a value corresponding to the operation, as in S602.
In this way, the enlargement / reduction process ends.

  In this way, it is determined whether the coordinates P serving as the reference position are inside or outside the enlarged display area 402, and the enlargement processing method is divided. As a result, an operation for accurately enlarging the center of the enlargement display area 402 and an enlargement operation for fixing a portion to be enlarged by the user can be performed, and an enlargement operation for quickly using different types of enlargement methods according to the user's purpose can be performed. It can be carried out.

  In the above example, the enlargement / reduction processing is performed even when there is a double touch as a specific event. Enlarging by double touch operation is common in the following cases. For example, in a smartphone, an image is often enlarged by a double touch operation, and the original size is often restored by performing the double touch operation again in that state. However, it is difficult to accurately enlarge the position intended by the user by a double touch operation. In addition, fixing the enlargement by double touch based on the center of the enlargement display area 402 is also less flexible. Therefore, by dividing the enlargement process according to the position of the coordinates P, it is possible to immediately switch between an intuitive enlargement operation and an accurate enlargement operation, thereby improving operability.

  FIG. 7 is a flowchart showing a more detailed process flow when the specific event is a pinch in the enlargement / reduction process in step S503 of FIG. This process is realized by developing a program recorded in the nonvolatile memory 56 in the system memory 52 and executing it by the system control unit 50.

The system control unit 50 determines whether or not the specific touch event determined in step S502 of FIG. 5 is a pinch event (S701). If it is not a pinch event, the system control unit 50 ends the enlargement / reduction process (S701: N).
In the case of a pinch event, the system control unit 50 determines whether one of the two touch positions is on the focus confirmation screen release button 403 (S701: Y, S702).
When the touch position is on the focus confirmation screen release button 403, the system control unit 50 performs a process of canceling the activation of the process corresponding to the focus confirmation screen release button 403 so that the two-screen display is not released (S702: Y). , S703). This prevents the two-screen display from being released by accidentally touching the focus confirmation screen release button 403 during a pinch operation, and continues the enlargement operation.

When there is no touch position on the focus confirmation screen release button 403 (S702: N), or after the cancellation of the two-screen display is prevented, the system control unit 50 determines the coordinates P (center point at the start of the pinch operation) as the reference position Is in the enlarged display area 402 (S704).
When the coordinate P is within the enlarged display area 402, the system control unit 50 performs an enlargement / reduction process on the image with the coordinate P as the enlargement center (that is, the display position of the portion corresponding to the coordinate P is fixed). (Scaling process) is performed (S704: Y, S705). When the coordinate P is outside the enlarged display area 402, the system control unit 50 performs an enlargement / reduction process (magnification process) with the center of the enlarged display area 402 as the enlargement center (S704: N, S706).
In this way, the enlargement / reduction process ends.

  On a small display screen, it is difficult to perform an accurate image enlargement process by a pinch operation. Therefore, by dividing the enlargement process according to the position of the coordinate P, it is possible to achieve both an intuitive enlargement operation and an accurate enlargement operation, and to quickly switch between these operation methods.

  In the enlargement / reduction process described above, the example in which the determination of the enlargement / reduction process is performed based on whether the coordinate P is within the enlargement display area 402 has been described. The reason why the center of the enlarged display area 402 is set as the enlarged center is not a condition that the coordinate P is outside the enlarged display area, but a condition that the coordinate P is outside the enlarged display area and the entire display area 401. Also good. If the coordinate P is within the entire display area 401, the process of step S603 in FIG. 6 or S706 of FIG. 7 is performed, and if it is within the enlarged display area 402, the process of step S602 of FIG. This makes the operation easier to understand than touching where no image is displayed. This is because a portion where no image is displayed has an impression that a touch reaction does not occur even when touch-pressed, and is not intuitive as a user operation.

  Further, single touch may be excluded from the specific touch event determined in step S502 of FIG. The single touch operation is used to advance the image or change the center position in the enlarged display area 402, and therefore requires exclusive control with the enlargement process. Exclusive control has the disadvantages that the program of the determination flow becomes complicated and the processing time is extra, so there is an advantage in not including a single touch in a specific touch event.

  In the above-described example, the example in which the scaling method is selectively used depending on whether or not the center P of the touch positions of a plurality of points by double touch and pinch is within the enlarged display area 402 has been described. May be used properly depending on whether or not all are in the enlarged display area 402. That is, if all the touchdown positions of a plurality of touches by double touch or pinch are in the enlarged display area 402, enlargement / reduction may be performed with the center point of these touchdown positions as the enlargement center. . On the other hand, in this case, if at least one of the touchdown positions of a plurality of touches by double touch or pinch is outside the enlarged display area 402, enlargement / reduction is performed with the center of the enlarged display area 402 as the enlargement center.

  As described above, according to the present embodiment, it is possible to quickly switch between enlargement based on the center position of the enlarged display area 402 and enlargement based on the touch position. Therefore, it is possible to achieve both an intuitive enlargement operation and an accurate enlargement operation.

The above-described control centered on the system control unit 50 may be performed by a single piece of hardware, or may be performed by a plurality of pieces of hardware sharing processing.
Although the present invention has been described in detail based on the preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms without departing from the gist of the present invention are also included in the present invention. included. Furthermore, each embodiment mentioned above shows only one embodiment of this invention, and it is also possible to combine each embodiment suitably.
In the above-described embodiment, the case where the present invention is applied to the digital camera 100 has been described as an example. However, the present invention is not limited to this example. Applicable. That is, the present invention can be applied to a tablet PC, a PDA, a mobile phone terminal, a portable image viewer, a printer device including a display, a digital photo frame, a game machine, an electronic book reader, and the like.

(Other embodiments)
The present invention is also realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, etc.) of the system or apparatus reads the program code. It is a process to be executed. In this case, the program and the storage medium storing the program constitute the present invention.

  DESCRIPTION OF SYMBOLS 100 ... Digital camera, 50 ... System control part, 28 ... Display part, 101 ... Shutter, 102 ... Barrier, 103 ... Shooting lens, 22 ... Imaging part, 23 ... A / D converter, 24 ... Image processing part, 15 ... Memory control unit, 13 ... D / A converter, 32 ... Memory, 18 ... Interface, 52 ... System memory, 56 ... Non-volatile memory, 70 ... Operation unit, 61 ... Shutter button, 60 ... Mode dial, 72 ... Power switch , 80... Power source control unit, 30... Power source unit, 200.

Claims (25)

Position input means for receiving position input with respect to the display screen displayed on the display means;
When an enlargement operation involving input of a plurality of positions is performed by the position input unit, a specific position based on the plurality of positions is displayed as a display target to be enlarged by the enlargement operation in the display screen. if the area that is, the reference to the specific position, the said the display target portion before Symbol display object as unchanged before and after expansion that appear in a specific position in the area area And zoom in
If the particular location is outside the area, with reference to the center of the area, the display target portions the area in front Symbol Display object as unchanged before and after expansion, which is displayed at the center of the area Display control means for controlling to enlarge and display in the display control device. Position input means for receiving position input with respect to the display screen displayed on the display means;
When an enlargement operation involving the input of a plurality of positions is performed by the position input means, the plurality of positions are within an area where a display target to be enlarged by the enlargement operation is displayed on the display screen. if any, based on the specific position based on the position of the plurality of the said said displayed portion is pre-Symbol display object as unchanged before and after expansion that appear in a specific position in the area area And zoom in
If the position of said plurality of outside the area, with reference to the center of the area, the display target portions the area in front Symbol Display object as unchanged before and after expansion, which is displayed at the center of the area Display control means for controlling to enlarge and display in the display control device.   The display control apparatus according to claim 1, wherein the specific position is a midpoint of a plurality of positions input by the position input unit.   The display control apparatus according to any one of claims 1 to 3, wherein the enlargement operation is an operation of inputting a plurality of positions by the position input unit and widening between each of the plurality of positions. . The display control means performs control so that the display target is enlarged and displayed at a scaling factor corresponding to a change in distance between each of the plurality of positions input as the enlargement operation. Item 5. The display control device according to Item 4. 2. When three or more positions are input within a predetermined time by the position input means, the center point of three points in order from the earliest detected timing is set as the specific position. 5. The display control device according to any one of 4 . The display control apparatus according to claim 6 , wherein the display control unit determines the enlargement ratio of the enlargement according to an area surrounded by the three points used for determining the specific position. The enlargement operation, the display control device according to any one of claims 1 to 3, wherein it is an operation of continuously input a plurality of positions by the position input means within a predetermined period of time. Wherein the position input means display control apparatus according to any one of claims 1 to 8, characterized in that a touch panel. Touch detection means for detecting a touch operation on the display means;
When two places of the display means are touched and an operation of widening the interval between the two touch positions is performed, a middle point of the two touch positions is a display target to be enlarged among the display means. if but it displayed area, the middle point to display the previous SL display object expanding in the area as a reference, if the midpoint is outside the area, before with reference to the center of the area serial display display control apparatus characterized by comprising a display control means for controlling to enlarge and displays the object in the area. Touch detection means for detecting a touch operation on the display means;
When two places on the display means are touched and an operation for widening the interval between the two touch positions is performed, both of the two touch positions are displayed as display targets to be enlarged in the display means. if has been in the area, the midpoint of the touch position of the two positions and displays an enlarged front Symbol display interest in the area as a reference, at least one of the touch position of the two positions there outside the area in the display control apparatus characterized by comprising a display control means for controlling to display the previous SL display object expanding in the area with respect to the center of the area. Touch detection means for detecting a touch operation on the display means;
When an operation of continuously touching the display unit twice within a predetermined time is performed, a specific position based on the touch position by the two touches is a display to be enlarged in the display unit. within the area of interest is displayed, the reference to the specific position, the display target portion before Symbol display object as unchanged before and after the enlargement to be displayed on the specific position in the area If the specific position is outside the area, the display target portion displayed at the center of the area does not change between before and after the enlargement. display control apparatus characterized by a pre-Symbol display object and a display control means for displaying an enlarged in the area as. Touch detection means for detecting a touch operation on the display means;
An area in which a display target that is an enlargement target of the display means is displayed when a touch position by the two touches is performed twice continuously within a predetermined time on the display means. if the inner, the reference to the specific position based on the touch position by the two touch, the display target portion before SL as unchanged before and after the enlargement to be displayed on the specific position in the area the Viewing object displayed enlarged in the area, if it is out of the two touch positions by said area touch, with reference to the center of the area, part of the display object to be displayed at the center of the area There display control device characterized by having a display control means for controlling the pre-Symbol display object as unchanged before and after the expansion so as to display an enlarged in the area. The specific position is a midpoint of each touch position by the two touches,
The display control apparatus according to claim 12 or 13 . The display control means, as the display target portion displayed at the position serving as the reference in the area is not strange straw before and after the expansion, so as to display the previous SL Display object expanding in the area the display control device according to any one of claims 10 to 14, wherein the controller controls the. The said display unit, in addition to the area, the whole of the pre-Symbol Display object is displayed on the entire display area,
Wherein the display control unit, wherein when the specific position of and the entire display area outside the area controlled to a pre-Symbol Display object expanding and displaying in the area based on the center position of the area The display control device according to claim 1 , wherein the display control device is a display control device. Prior Symbol Display object, characterized in that an image,
The display control device according to any one of claims 1 to 16. When a position input step for receiving an input of a position with respect to a display screen displayed on the display means and an enlargement operation involving input of a plurality of positions in the position input step are performed,
In a case where the specific position based on the plurality of positions is in an area in which the display target to be enlarged by the enlargement operation is displayed on the display screen, the specific position is used as a reference in the area. the specific of the display target portion before Symbol display object as unchanged before and after the enlargement to be displayed on the position display and expanded in the area,
Wherein when the specific position outside said area, based on the center of the area, the display target portions the front Symbol Display object as unchanged before and after expansion, which is displayed at the center of the area A display control step of controlling the display so as to be enlarged and displayed in an area. When a position input step for receiving an input of a position with respect to a display screen displayed on the display means and an enlargement operation involving input of a plurality of positions in the position input step are performed,
In the case where the plurality of positions are in an area where a display target to be enlarged by the enlargement operation is displayed in the display screen, the specific position based on the plurality of positions is used as a reference in the area. the specific of the display target portion before Symbol display object as unchanged before and after the enlargement to be displayed on the position display and expanded in the area,
If the position of said plurality of outside the area, based on the center of the area, the display target portions the front Symbol Display object as unchanged before and after expansion, which is displayed at the center of the area A display control step of controlling the display so as to be enlarged and displayed in an area. A touch detection step for detecting a touch operation on the display means;
When two places on the display means are touched and an operation to increase the interval between the two touch positions is performed,
Expanding the midpoint touch two positions, wherein when in the area where the display object is displayed to be enlarged among the display means, in the area in front Symbol Display object as a reference the midpoint And display
If the midpoint is outside the area, display control, characterized by comprising a display control step of controlling the pre-Symbol Display object to display an enlarged in the area with respect to the center of the area Control method of the device. A touch detection step for detecting a touch operation on the display means;
When two places on the display means are touched and an operation to widen the interval between the two touch positions is performed,
When both the touch position of the two positions in the area where the display object is displayed to be enlarged among the display means, the pre-Symbol Display target based on the midpoint of the touch position of the two positions Magnify and display in the area,
When at least one of the touch position of the two positions is out of the area, to have a display control step of controlling the pre-Symbol Display object to display an enlarged in the area with respect to the center of the area A control method for a display control device. A touch detection step for detecting a touch operation on the display means;
When an operation of continuously touching the display means twice within a predetermined time is performed,
When the specific position based on the touch position by the two touches is in the area where the display target to be enlarged among the display means is displayed, the specific position in the area is used with reference to the specific position . the specific of the display target portion before Symbol display object as unchanged before and after the enlargement to be displayed on the position display and expanded in the area,
Wherein when the specific position outside said area, based on the center of the area, the display target portions the front Symbol Display object as unchanged before and after expansion, which is displayed at the center of the area A display control step of controlling the display so as to be enlarged and displayed in an area. A touch detection step for detecting a touch operation on the display means;
When an operation of continuously touching the display means twice within a predetermined time is performed,
When the touch position by the two touches is within the area where the display target to be enlarged among the display means is displayed, the specific position based on the touch position by the two touches is used as a reference . the specific of the display target portion before Symbol display object as unchanged before and after the enlargement to be displayed on the position display and expanded in the area in the area,
Wherein when the touch position is outside the area by the two touch, with reference to the center of the area, Symbol table before as unchanged before and after the displayed portion displayed at the center is enlarged in the area A display control step of controlling the display target to be enlarged and displayed in the area. The program for functioning a computer as each means of the display control apparatus as described in any one of Claims 1 thru | or 17 . A computer-readable storage medium storing a program for causing a computer to function as each unit of the display control device according to any one of claims 1 to 17 .

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