Image display unit, image display method and image display program

Abstract

To provide an image display unit capable of improving user's usability.SOLUTION: An image display unit is configured to: detect the angle of a quadrangular display screen; generate a first display image having long sides in a horizontal direction when detecting long sides as lengthwise sides being in the horizontal direction; generate a second display image having long sides in a perpendicular direction when detecting the long sides being in the perpendicular direction; generate a third display image for displaying a display image rotated by a previously set angle of inclination when detecting the long sides of the display screen being within an oblique detection angle range; and display the generated display image.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention is suitably applied to an image display device such as a smartphone on which an individual views images. [Background technology]

[0002] In recent years, technology that allows individuals to easily shoot, distribute, and post videos, and to watch distributed and posted videos, has become widespread (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-108757 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, when watching such videos, users have to select either portrait or landscape orientation, which can cause hand fatigue when holding the smartphone to watch, making it difficult for users to use.

[0005] The present invention has been made to solve such problems, and its object is to provide an image display device, an image display method, and an image display program that can improve usability for users. [Means for solving the problem]

[0006] In order to solve this problem, the image display device of the present invention includes: an angle detection unit that detects the angle of a rectangular display screen; When the angle detection unit detects that a long side that is a side in a longitudinal direction is horizontal, a first display image is generated in which the long side is horizontal; generating a second display image in which the long side is oriented vertically when the angle detection unit detects that the long side is oriented vertically; an image generating unit that generates a third display image that displays a display image rotated by a preset tilt angle when the angle detecting unit detects that the long side of the display screen is within a tilt detection angle range; a display unit that displays the display image generated by the image generation unit; The present invention is characterized by having the following.

[0007] The image display method of the present invention further includes an angle detection step of detecting an angle of a rectangular display screen; generating a first display image in which the long side, which is a side in the longitudinal direction, is displayed as being horizontal when the long side is detected as being horizontal in the angle detection step; generating a second display image in which the opposite sides in the longitudinal direction are displayed as being vertical when the opposite sides in the shorter direction are detected as being vertical in the angle detection step; an image generating step of generating a third display image that displays a display image rotated by a preset tilt angle when the long side of the display screen is detected to be within a tilt detection angle range in the angle detecting step; a display step of displaying the display image generated in the image generation step; The present invention is characterized by having the following.

[0008] In the image display program of the present invention, an angle detection step for detecting an angle of a rectangular display screen; generating a first display image in which the long side, which is a side in the longitudinal direction, is displayed as being horizontal when the long side is detected as being horizontal in the angle detection step; generating a second display image in which the opposite sides in the longitudinal direction are displayed as being vertical when the opposite sides in the shorter direction are detected as being vertical in the angle detection step; an image generating step of generating a third display image that displays a display image rotated by a preset tilt angle when the long side of the display screen is detected to be within a tilt detection angle range in the angle detecting step; a display step of displaying the display image generated in the image generation step; The present invention is characterized in that the following is executed. [Effects of the Invention]

[0009] The present invention can realize an image display device, an image display method, and an image display program that can improve usability for users. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic diagram showing a configuration (1) of an image display system according to the present embodiment. [Figure 2] FIG. 2 is a block diagram showing the electrical configuration of the mobile communication terminal; [Figure 3] FIG. 10 is a schematic diagram showing a configuration (2) of an image display system according to the present embodiment. [Figure 4] 10A and 10B are schematic diagrams illustrating a screen when photographing in an oblique display mode. [Figure 5] 10 is a schematic diagram illustrating a screen on which an image captured in an oblique display mode is displayed in a portrait display mode; FIG. [Figure 6] 10A and 10B are schematic diagrams illustrating image display processing. [Figure 7] 1 is a schematic diagram illustrating a conventional still image display; [Figure 8] 10A and 10B are schematic diagrams illustrating the display of a still image in an oblique display mode. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. First Embodiment 1, the image display system as a whole is designated by 1. The image display system 1 acquires image data through communication using various electric communication circuits such as the Internet using wireless and wired connections, and the acquired image data is displayed on a display unit 24.

[0012] As shown in Fig. 2, mobile communication terminal 2 has a computer configuration, and control unit 21, which is composed of a CPU (Central Processing Unit), ROM (Read Only Memory), and RAM (Random Access Memory), controls the entire mobile communication terminal 2 and executes image display processing in accordance with an image display program pre-stored in storage unit 25. Mobile communication terminal 2 communicates with other devices via external interface 23 and executes image display processing. As mobile communication terminal 2, a terminal that is intended to be used while held in hand, such as a smartphone or tablet terminal, is preferably used.

[0013] For example, in response to a user's operation input to operation input unit 26, which is formed of a touch panel or the like, mobile communication terminal 2 causes image data stored in storage unit 25 to be displayed as a display image on display unit 24. Similarly, when image data is supplied via external interface 23, mobile communication terminal 2 causes the image data to be displayed as a display image on display unit 24.

[0014] In response to the user's operation input to the operation input unit 26, the control unit 21 displays the captured image taken by the camera unit 27 on the display unit 24 as a display image, and stores the captured image in the memory unit 25 in response to the user's operation input.

[0015] In the image display system 1 shown in Figure 1, as shown in Figures 1(A) and 1(B), when the short side 2B of the mobile communication terminal 2 is horizontal, the display automatically switches between portrait display, in which an image is displayed long in the vertical direction, and landscape display, in which an image is displayed long in the horizontal direction, when the long side 2A of the mobile communication terminal 2 is horizontal.

[0016] Specifically, control unit 21 of mobile communication terminal 2 monitors angle detection unit 22, which is composed of an angular velocity sensor, an acceleration sensor, etc., and monitors the current direction of long side 2A. If long side 2A is parallel to the vertical direction perpendicular to the horizontal direction, control unit 21 recognizes that the current mode is portrait display mode, in which portrait display is required, and displays display image 24A on display unit 24 so that long side 2A is oriented vertically (up and down).

[0017] Furthermore, when the long side 2A is parallel to the horizontal direction, the control unit 21 recognizes that the current mode is landscape display mode, in which landscape display is required, and displays the display image 24A on the display unit 24 so that the long side 2A is horizontal (left and right).

[0018] In this landscape display mode, if the image data to be displayed is a vertical image with its longitudinal direction in the up-down direction, the control unit 21 rotates the image data by 90 degrees and displays the display image data with margin area 24B added in the left-right direction.

[0019] 1(C) and 1(D), the present invention has an oblique display mode in which the up-down direction of the display image is displayed parallel to the vertical direction when the mobile communication terminal 2 is tilted obliquely. In this oblique display mode, the up-down direction and the left-right direction of the display image 24A are determined based on the diagonal line of the display unit 24 of the mobile communication terminal 2.

[0020] Specifically, when the display image data is a portrait image and the inclination angle of the long side 2A is within a preset inclination detection angle range (for example, 10 to 22.5°) from the vertical direction, the control unit 21 of the mobile communication terminal 2 transitions to a portrait-inclined display mode, rotates the display image data by an inclination angle AR at which the diagonal becomes parallel to the vertical direction and in the opposite direction to the inclination angle AR, trims the portion that extends beyond the display unit 24, and adds margin areas 24X and 24Y in the left-right and top-bottom directions instead to generate the display image data.

[0021] At this time, function information 24V indicating the remaining battery level and radio wave status of the mobile communication terminal 2 and setting operation information 24W relating to setting operations are displayed superimposed on the marginal areas 24X and 24Y. Note that the tilt angle AR is preferably set to 10° to 45°.

[0022] Also, as shown in FIG. 3, when the display image data is a landscape image and the tilt angle of the long side 2A is within a preset tilt detection angle range (for example, 10 to 22.5°) from the horizontal direction, the control unit 21 of the mobile communication terminal 2 transitions to a landscape / oblique display mode, rotates the display image data by a tilt angle AR at which the diagonal line becomes parallel to the horizontal direction and in the opposite direction to the tilt angle AR, trims the portion that extends beyond the display unit 24, and adds margin areas 24X and 24Y in the left-right and top-bottom directions instead to generate the display image data.

[0023] As a result, display image 24A can be displayed on the display unit with mobile communication terminal 2 held at an angle, with almost no change in the size of the image data. By holding mobile communication terminal 2 at an angle, mobile communication terminal 2 can be held using the palm of the hand, making it less tiring to hold mobile communication terminal 2 for long periods of time.

[0024] Next, a case where a photograph is taken in an oblique position when a photographed image is to be distributed or posted, such as in a live distribution, will be described.

[0025] As shown in Fig. 4, when shooting, a guide area 24S is displayed as an indicator for when the diagonal line is aligned vertically or horizontally. By shooting with this guide area aligned horizontally, the photographer can shoot with the camera tilted by the tilt angle AR.

[0026] Specifically, when the current tilt angle of long side 2A from the vertical direction is within a preset tilt detection angle range, control unit 21 of mobile communication terminal 2 transitions to vertical oblique shooting mode and causes display unit 24 to display an image in which guide area 24S is superimposed on the captured image being shot as a display image. At this time, control unit 21 tilts text information 24Z by tilt angle AR as necessary to make it appear horizontal and generates display image data.

[0027] As shown in Figure 5, the mobile communication terminal 2 that is viewing the distribution rotates the display image data by an inclination angle AR so that the diagonal line becomes parallel to the vertical direction, in the opposite direction to the inclination angle AR, trims the portion that extends beyond the display unit 24, and instead adds margin areas 24X and 24Y in the left-right and top-bottom directions to generate the display image data.

[0028] Although not shown, when the current tilt angle of the long side 2A is within a preset tilt detection angle range from the horizontal direction, the control unit 21 transitions to a vertical oblique shooting mode and causes the display unit 24 to display an image in which the guide area 24S is superimposed on the captured image being shot. At this time, the control unit 21 tilts the text information 24Z by the tilt angle AR as necessary to make it appear horizontal, and generates display image data.

[0029] As shown in Figure 6, the mobile communication terminal 2 that is viewing the distribution rotates the display image data by an inclination angle AR so that the diagonal line is parallel to the horizontal direction, and in the opposite direction to the inclination angle AR, and trims the portion that extends beyond the display unit 24, and instead adds margin areas 24X and 24Y in the left-right and top-bottom directions to generate the display image data.

[0030] In this way, with the mobile communication terminal 2, it is possible to take an image while holding the mobile communication terminal 2 at an angle.

[0031] Next, the image display process executed according to the image display program will be described with reference to the flowchart of FIG.

[0032] When a request to display a display image is made, the control unit 21 of the mobile communication terminal 2 starts image display processing and proceeds to step S1.

[0033] In step S1, the control unit 21 detects the current angle of the mobile communication terminal 2, and proceeds to the next step S2. In step S2, the control unit 21 determines whether the angle of the long side 2A is within the oblique detection angle range.

[0034] If a negative result is obtained here, this indicates that the angle of the long side 2A is horizontal or vertical, and in this case the control unit 21 proceeds to the next step S7.

[0035] In step S7, the control unit 21 determines whether the angle of the long side 2A is horizontal or not, and if a positive result is obtained, transitions to a landscape display mode in which display image data is generated in a state in which the long side is parallel to the vertical direction, and proceeds to the next step S11.

[0036] On the other hand, if a negative result is obtained in step S7, this means that the angle of the long side 2A is parallel to the vertical direction, so the system transitions to portrait display mode, which generates display image data with the long side parallel to the left and right directions, and proceeds to the next step S11.

[0037] On the other hand, if a positive result is obtained in step S2, the control unit 21 proceeds to step S3, determines that the image data to be displayed is a portrait image whose longitudinal direction is the up-down direction, and proceeds to the next step S4.

[0038] In step S4, the control unit 21 transitions to the vertical oblique display mode, rotates the portrait image by the oblique angle, and generates display image data, and then proceeds to the next step S11.

[0039] If a negative result is obtained in step S3, it is determined that the image data is a landscape image with the longitudinal direction being the left-right direction, and the process proceeds to the next step S5. In step S5, the control unit 21 transitions to the landscape oblique display mode, rotates the landscape image by the oblique angle, and generates display image data, and the process proceeds to the next step S11.

[0040] In step S11, the control unit 21 displays the image data generated in steps S4, 5, 8, and 9 as a display image on the display unit 24, and ends the image display process.

[0041] <Actions and effects> The following describes the features of the inventions extracted from the above-described embodiments, while indicating their effects as necessary. Note that, for ease of understanding, the corresponding configurations in the above-described embodiments are indicated in parentheses as appropriate, but the specific configurations indicated in parentheses are not limited to these. Furthermore, the meanings and examples of terms described in each feature may also be applied as the meanings and examples of terms described in other features described in the same wording.

[0042] In the above-described configuration, the image display device of the present invention has: an angle detection unit (angle detection unit 22) that detects the angle of the rectangular display screen; When the angle detection unit detects that a long side that is a side in a longitudinal direction is horizontal, a first display image is generated in which the long side is horizontal; generating a second display image in which the long side is oriented vertically when the angle detection unit detects that the long side is oriented vertically; an image generating unit (control unit 21) that generates a third display image that displays a display image rotated by a preset tilt angle when the angle detecting unit detects that the long side of the display screen is within a tilt detection angle range; The image processing device is characterized by having a display unit (display unit 24) that displays the generated first to third images.

[0043] This enables display in a diagonal display mode in addition to the conventional portrait display mode and landscape display mode, allowing the user to hold the image display device in a convenient manner, thereby improving usability for the user.

[0044] In the image display device, the image generation unit The image data to be displayed is a portrait image in which the longitudinal direction is vertical, and when the long side is detected to be within the tilt detection angle range, a third display image is generated in which the long side is tilted from the vertical direction by the tilt angle.

[0045] This allows a vertically long image to be displayed on an image display device that is tilted obliquely while maintaining its horizontality and minimizing the amount of trimming required.

[0046] In the image display device, the image generation unit The image data to be displayed is a landscape-oriented image in which the longitudinal direction is horizontal, and when the long side is detected to be within the oblique detection angle range, a fourth display image is generated in which the long side is inclined from the horizontal direction by the inclination angle.

[0047] This allows a landscape image to be displayed on an image display device that is tilted obliquely while being long in the horizontal direction, while maintaining the horizontality of the landscape image and minimizing the amount of trimming required.

[0048] In the image display device, the image generation unit When the angle detection unit detects that the diagonal of the display screen is horizontal, a third display image is generated in which the diagonal is displayed as if it were horizontal.

[0049] This allows the diagonal line of the image display device, i.e., the line that can be displayed at its longest, to be displayed horizontally, which allows for games and other applications where the left and right, top and bottom lengths are different and long horizontal lines can be used, providing unprecedented ways of enjoying the game.

[0050] In the image display device, the image generation unit When the angle detection unit detects that the diagonal of the display screen is in the vertical direction, a third display image is generated in which the diagonal is displayed as if it were in the vertical direction.

[0051] This allows the diagonal line of the image display device, i.e., the line that can be displayed at its longest, to be displayed horizontally, which allows for games and other applications where the left and right, top and bottom lengths are different and long horizontal lines can be used, providing unprecedented ways of enjoying the game.

[0052] In the image display device, the image generation unit The image display device according to claim 1, characterized in that, when the angle detection unit detects that the long side is within the oblique detection angle range, the display image in which the long side is tilted by 45 degrees, which is the inclination angle, is generated as the third display image.

[0053] This allows the third display image to be displayed regardless of whether it is a portrait or landscape image.

[0054] In the image display device, The image generation unit generating a third display image in which the diagonal line of the display screen is displayed as being horizontal when the angle detection unit detects that the diagonal line of the display screen is horizontal; When the angle detection unit detects that the diagonal of the display screen is in the vertical direction, a fourth display image is generated in which the diagonal is displayed as if it were in the vertical direction.

[0055] This allows for diagonal display in accordance with portrait and landscape images, and allows for images to be displayed at an angle with minimal trimming.

[0056] In the image display device, the image generation unit When generating the third display image, tilted image data is generated in a state in which the image data is tilted by a horizontal tilt angle from the horizontal direction up to the tilt angle, and terminal information and operation information for operating the tilted image data displayed at the upper and lower ends of the first display image are superimposed on a margin area formed in the color rendering direction.

[0057] This allows the blank space to be utilized to display operation information, reducing the sense of discomfort that the user may feel about the blank space.

[0058] In the image display device, When the angle detection unit detects that the long side is within a diagonal detection angle range, The image generation unit Displaying the captured image during shooting as the tilt angle corresponding to the tilt detection angle range in which the image was captured; The image supply unit supplies the tilt angle at the time of photography as an oblique photography angle together with photography data.

[0059] This allows the angle at which the image was taken to be transmitted from the image display device to another terminal to which the captured image is supplied.

[0060] In the image display device, a data acquisition unit that acquires shooting data and shooting angle information representing a shooting angle from another terminal; The image generation unit If the inclination angle of the long side when photographed is horizontal or vertical, the photographing data is rotated by the inclination angle to generate the first and second display images, and if the long side is within a tilt detection angle range, the photographing data is rotated by a subtraction angle obtained by subtracting the photographing angle information from the inclination angle to generate the third display image.

[0061] As a result, the other terminal to which the photographed image is supplied from the photographed image display device can recognize the tilt angle of the image that can maintain horizontality, and can display the photographed image without disrupting the horizontal direction of the photographed image.

[0062] In the image display device, The tilt angle is characterized by being 10 to 20°.

[0063] This makes it possible to make the image display device easier to hold while minimizing the amount of trimming (blank area) that occurs due to tilting.

[0064] <Other embodiments> In the above embodiment, the tilt angle is set so that the diagonal of the display unit 24 is parallel to the horizontal or vertical direction, but the present invention is not limited to this. For example, the tilt angle can be fixed to a single angle, such as 15°. This simplifies program design because the tilt angle does not differ for each mobile communication terminal 2.

[0065] While the above-described embodiment describes the display of moving images, the present invention is not limited to this. For example, as shown in FIGS. 7 and 8, the present invention can also be applied to the display of still images such as comics. In this case, image data that would normally be displayed one page at a time can be placed adjacent to each other to generate image data, and the display image 24A can be displayed as a slide display in response to user operations. Of course, the display image 24A can also be enlarged or reduced in response to operations such as pinching out. The same applies to displaying websites, blogs, and social networking services (SNS). It can also be used for inputting text on a touch panel. In this case, rather than holding the smartphone by the sides and back with the fingers of the non-dominant hand as in the past, the smartphone can be held in the palm of the hand and held from below with all five fingers, reducing the risk of dropping it. Furthermore, just as tilting a piece of paper makes it easier to write, tilting the smartphone also facilitates handwriting input and scrolling.

[0066] In the above embodiment, the portable communication terminal 2 has a rectangular shape, but the present invention is not limited to this. For example, the present invention can be applied to a portable communication terminal having a square or circular display unit.

[0067] In the above embodiment, the present invention is applied to a portable communication terminal 2 that can be held in the hand, but the present invention is not limited to this. For example, the present invention can also be applied to a personal computer or television that can change the installation angle.

[0068] In the above embodiment, the present invention has been described as being applied to viewing moving images and still images, but the present invention is not limited to this. For example, the present invention can also be applied to games. In this case, since the shape of the displayed image is distorted, it is possible to increase the difficulty of the game by utilizing this shape. As the stage progresses, a diagonal display mode can also be applied.

[0069] In the above embodiment, the mobile communication terminal 2 as an image display device is configured by the angle detection unit 22 as an angle detection unit, the control unit 21 as an image generation unit, and the display unit 24 as a display unit, but the present invention is not limited to this. The image display device of the present invention can be configured by an angle detection unit, an image generation unit, and a display unit with various other configurations. [Industrial Applicability]

[0070] The present invention can be used, for example, in a mobile communication terminal used by a distributor who distributes moving images. [Explanation of symbols]

[0071] 1: Image display system 2: Mobile communication terminal 2A: Long side 2B: Short side 21: Control unit 22: Angle detection unit 23: External interface 24:Display section 24A: Display image 24B: Margin area 24S: Guide area 24V: Functionality Information 24W: Setting operation information 24X: Margin area 24Z:Text information 25: Storage section 26: Operation input section 27: Camera Department AR: Tilt angle

Claims

1. an angle detection unit that detects the angle of the rectangular display screen; generating a first display image in which the long side, which is a side in the longitudinal direction, is horizontal when the angle detection unit detects that the long side is horizontal; generating a second display image in which the long side is oriented vertically when the angle detection unit detects that the long side is oriented vertically; an image generating unit that generates a third display image that displays a display image rotated by a preset tilt angle when the angle detecting unit detects that the long side of the display screen is within a tilt detection angle range; a display unit that displays the display image generated by the image generation unit; An image display device comprising:

2. The image generation unit When the image data to be displayed is a portrait image whose longitudinal direction is the vertical direction and the long side is detected to be within the tilt detection angle range, the long side is tilted from the vertical direction by the tilt angle to generate the third display image.

2. The image display device according to claim 1, wherein the image display device is a display device having a plurality of display areas.

3. The image generation unit When the image data to be displayed is a landscape image whose longer side is horizontal and the longer side is detected to be within the tilt detection angle range, the longer side is tilted from the horizontal direction by the tilt angle to generate the third display image.

3. The image display device according to claim 2.

4. The image generation unit When the angle detection unit detects that the diagonal of the display screen is horizontal, a third display image is generated in which the diagonal is displayed as the horizontal direction.

2. The image display device according to claim 1, wherein the image display device is a display device having a plurality of display areas.

5. The image generation unit When the angle detection unit detects that a diagonal line of the display screen is in a vertical direction, the third display image is generated so that the diagonal line is displayed as being in a vertical direction.

2. The image display device according to claim 1, wherein the image display device is a display device having a plurality of display areas.

6. The image generation unit When the angle detection unit detects that the long side is within the oblique detection angle range, the display image in which the long side is inclined by 45 degrees, which is the inclination angle, is generated as the third display image.

2. The image display device according to claim 1, wherein the image display device is a display device having a plurality of display areas.

7. The image generation unit generating a third display image in which the diagonal line of the display screen is displayed as being horizontal when the angle detection unit detects that the diagonal line of the display screen is horizontal; When the angle detection unit detects that the diagonal of the display screen is in the vertical direction, a fourth display image is generated in which the diagonal is displayed as being in the vertical direction.

2. The image display device according to claim 1, wherein the image display device is a display device having a plurality of display areas.

8. The image generation unit When generating the third display image, tilted image data is generated in a state in which the image data is tilted by a horizontal tilt angle from the horizontal direction up to the tilt angle, and terminal information and operation information for operating the tilted image data, which are displayed at the top and bottom ends of the first display image, are superimposed on margin areas formed in the color rendering direction.

2. The image display device according to claim 1, wherein the image display device is a display device having a plurality of display areas.

9. When the angle detection unit detects that the long side is within a diagonal detection angle range, The image generation unit Displaying the captured image during shooting as the tilt angle corresponding to the tilt detection angle range in which the image was captured; an image supply unit that supplies the tilt angle at the time of photography as an oblique photography angle together with photography data; 2. The image display device according to claim 1, further comprising:

10. a data acquisition unit that acquires shooting data and shooting angle information representing a shooting angle from another terminal; The image generation unit If the inclination angle of the long side at the time of photographing is horizontal or vertical, the photographing data is rotated by the inclination angle to generate the first and second display images, and if the long side is within a tilt detection angle range, the photographing data is rotated by a subtraction angle obtained by subtracting the photographing angle information from the inclination angle to generate the third display image.

10. The image display device according to claim 9.

11. The inclination angle is １０～２０° 2. The image display device according to claim 1, wherein:

12. an angle detection step for detecting an angle of a rectangular display screen; generating a first display image in which the long side, which is a side in the longitudinal direction, is displayed as being horizontal when the long side, which is a side in the longitudinal direction, is detected as being horizontal in the angle detection step; generating a second display image in which the opposite side in the longitudinal direction is displayed as being vertical when the opposite side in the shorter side direction is detected as being vertical in the angle detection step; an image generating step of generating a third display image that displays a display image rotated by a preset tilt angle when the long side of the display screen is detected to be within a tilt detection angle range in the angle detecting step; a display step of displaying the display image generated in the image generation step; An image display method comprising:

13. For computers, an angle detection step for detecting an angle of a rectangular display screen; generating a first display image in which the long side, which is a side in the longitudinal direction, is displayed as being horizontal when the long side, which is a side in the longitudinal direction, is detected as being horizontal in the angle detection step; generating a second display image in which the opposite side in the longitudinal direction is displayed as being vertical when the opposite side in the shorter side direction is detected as being vertical in the angle detection step; an image generating step of generating a third display image that displays a display image rotated by a preset tilt angle when the long side of the display screen is detected to be within a tilt detection angle range in the angle detecting step; a display step of displaying the display image generated in the image generation step; An image display program characterized by causing the program to execute the above steps.

Images