DISPLAY CONTROL DEVICE, DISPLAY CONTROL METHOD, AND PROGRAM

There is provided a display control device including an evaluation unit configured to evaluate difference between left-eye image data and right-eye image data which constitute image data, and a determination unit configured to determine which of a plane display type and a stereopsis display type is used for performing display using the image data, in response to an evaluation result from the evaluation unit.

TECHNICAL FIELD

The present disclosure relates to a display control device, a display control method, and a program.

BACKGROUND ART

Recently, a 3D display device which can cause a user to perceive a stereoscopic image by displaying a left-eye image (L image) and a right-eye image (R image) has been distributed. By using the 3D display device, while the user can obtain an effect that realistic sensation of the user is enhanced, the user easily gets eyestrain. Although there are diverse factors of the eyestrain, the factors include crosstalk occurring from a mixture of L images and R images, and flicker occurring from lack of a refresh rate of a liquid crystal shutter, as examples. Accordingly, a frame rate of a liquid crystal has been improved, and shutter grasses have been improved. However, a matter of the eyestrain has not solved enough.

In addition, in a case where display is extruded excessively or in a case where change of disparity difference is wide, fatigue of the user becomes severe. From such a standpoint, a technology of comfortable 3D display has been investigated. For example, Patent Literature 1 discloses a disparity conversion device configured to adjust disparity between an L image and an R image by shifting the L image and/or the R image in a horizontal direction.

Moreover, it has been considered that occurrence of the eyestrain depends not only on display types and equipment, but also individual characteristics of a user who views video and a way the user views the video. According to such situation, a guideline for viewing ways and equipment has been issued. For example, 3D Consortium promoting progress of 3D industry by public and private cooperation made a guideline for viewing stereoscopic video and aims to achieve comfortable stereoscopic-image viewing.

CITATION LIST

Patent Literature

SUMMARY OF INVENTION

Technical Problem

As described above, by adjusting disparity or by devising viewing ways, it is possible to improve a certain amount of fatigue of the user. However, even if the disparity has been adjusted and the viewing ways have been devised, the fatigue of the user increases as time for viewing stereopsis-displayed video becomes longer.

Accordingly, the present disclosure proposes a novel and improved display control device, display control method, and program capable of decreasing eyestrain of a user.

Solution to Problem

According to the present disclosure, there is provided a display control device including an evaluation unit configured to evaluate difference between left-eye image data and right-eye image data which constitute image data, and a determination unit configured to determine which of a plane display type and a stereopsis display type is used for performing display using the image data, in response to an evaluation result from the evaluation unit.

According to the present disclosure, there is provided a display control method including evaluating difference between left-eye image data and right-eye image data which constitute image data, and determining which of a plane display type and a stereopsis display type is used for performing display using the image data, in response to an evaluation result of the difference.

According to the present disclosure, there is provided a program causing a computer to function as an evaluation unit configured to evaluate difference between left-eye image data and right-eye image data which constitute image data, and a determination unit configured to determine which of a plane display type and a stereopsis display type is used for performing display using the image data, in response to an evaluation result from the evaluation unit.

Advantageous Effects of Invention

As described above, according to the present disclosure, eyestrain of a user can be decreased.

DESCRIPTION OF EMBODIMENTS

Also, in the present specification and the drawings, different letters are sometimes suffixed to the same reference signs to distinguish a plurality of constituent elements having substantially the same functional configuration from each other. However, when it is not necessary to distinguish the plurality of constituent elements having substantially the same functional configuration, only the same reference signs are given.

Note that the present disclosure will be explained in the following order.

1. Fundamental Configuration of Display System

2. First Embodiment

2-1. Configuration of Display Device according to First Embodiment
2-2. Operation of Display Device according to First Embodiment

3. Second Embodiment

1. FUNDAMENTAL CONFIGURATION OF DISPLAY SYSTEM

A technology according to the present disclosure may be performed in various forms as described in detail in “2. First Embodiment” to “3. Second Embodiment” as examples. A display device100according to each embodiment having functions as a display control device includes:

A. an evaluation unit (extrusion-amount calculation unit120) configured to evaluate difference between left-eye image data and right-eye image data which constitute image data; and
B. a determination unit (display-type determination unit124) configured to determine whether a plane display type or a stereopsis display type is applied to performing display using the image data in response to an evaluation result from the evaluation unit.

First, with reference toFIG. 1andFIG. 2, a fundamental configuration of a display system which is common to each embodiment will be described as follows.

FIG. 1is an explanatory diagram showing a configuration of a display system according to an embodiment of the present disclosure. As shown inFIG. 1, the display system according to the embodiment of the present disclosure includes a display device100and shutter glasses200.

As shown inFIG. 1, the display device100includes a display unit110on which an image is displayed. The display device100can cause a user to perceive a stereoscopic image (3D image) by displaying a left-eye image (L image) and a right-eye image (R image) on the display unit110. In addition, the display device100includes an imaging unit114for imaging a range from which the display device100can be viewed. By analyzing a captured image obtained by the imaging unit114, it is possible to recognize a user who views the display device100.

The shutter glasses200include a right-eye image transparent unit212and a left-eye image transparent unit214which are composed of a liquid crystal shutter, for example. The shutter glasses200performs open/close operation on the right-eye image transparent unit212and the left-eye image transparent unit214in response to a signal transmitted from the display device100. The user can perceive, as a 3D image, the left-eye image and the right-eye image that are displayed on the display unit110by seeing light radiated from the display unit110through the right-eye image transparent unit212and the left-eye image transparent unit214of the shutter glasses200.

On the other hand, in a case where a normal 2D image is displayed on the display unit110, the user can perceive, as the normal 2D image, an image displayed on the display unit110by seeing light radiated from the display unit110without any operation.

FIG. 1shows the display device100as an example of the display control device. However, the display control device is not limited thereto. For example, the display control device may be an information processing apparatus such as a personal computer (PC), a household video processing apparatus (a DVD recorder, a video cassette recorder, and the like), a personal digital assistant (PDA), a household game device, a cellular phone, a portable video processing apparatus, or a portable game device. Alternatively, the display control device may be a display installed at a theater or in a public space.

In addition, the present specification explains a control method using shifter operation so as to a left-eye image is perceived by a left eye and a right-eye image is perceived by a right eye. However, the control method is not limited thereto. For example, similar effect can be obtained by using a polarization filter for the left eye and a polarization filter for the right eye.

Background

However, in a general display device having a 3D display function, fatigue of a user becomes severe in a case where display is extruded excessively or in a case where change of disparity is wide. From such a standpoint, a technology of comfortable 3D display has been investigated. For example, the technology of adjusting disparity between an L image and an R image by shifting the L image and/or the R image in a horizontal direction has been known. Moreover, it has been considered that occurrence of the eyestrain depends not only on display types and equipment, but also individual characteristics of a user who views video and a way the user views the video. According to such situation, a guideline for viewing ways and equipment has been issued. For example, 3D Consortium promoting progress of 3D industry by public and private cooperation made a guideline for viewing stereoscopic video and aims to achieve comfortable stereoscopic-image viewing.

As described above, by adjusting disparity or by devising viewing ways, it is possible to improve a certain amount of fatigue of the user. However, even if the disparity has been adjusted and the viewing ways have been devised, the fatigue of the user increases as time for viewing 3D-displayed video becomes longer.

Therefore, with the above circumstance taken into point of view, the display device100according to respective embodiments of the present disclosure has been achieved. The display device100according to the respective embodiments of the present disclosure can decrease eyestrain of a user. Hereinafter, there is subsequently and specifically described the display device100according to the respective embodiments of the present disclosure.

2. FIRST EMBODIMENT

2-1. Configuration of Display Device According to First Embodiment

FIG. 2is an explanatory diagram showing a configuration of the display device100according to a first embodiment. As shown inFIG. 2, the display device100according to the first embodiment includes a display unit110, an imaging unit114, an extrusion-amount calculation unit120, a display-type determination unit124, a setting unit128, a display control unit132, a shutter control unit136, and an infrared communication unit140. Since the description is made in “1. Fundamental Configuration of Display System,” the repeated descriptions of the display unit110and the imaging unit114will be omitted hereafter.

To the extrusion-amount calculation unit120, a 3D video signal including image data composed of L image data and R image data is input. The 3D video signal may be a received video signal or a video signal read out from a storage medium. The extrusion-amount calculation unit120evaluates difference between the L image data and the R image data that are included in the 3D video signal. For example, the extrusion-amount calculation unit120calculates extrusion amount from the display unit110to a position at which the user perceives that an image exists when 3D display is performed on the basis of the L image data and the R image data. With reference toFIG. 3, a specific example of a way of calculating the extrusion amount will be explained hereinafter.

FIG. 3is an explanatory diagram showing a way of calculating extrusion amount of an image. As shown inFIG. 3, when an R image and an L image are displayed at different positions on the display unit110, the user perceives that an image exists at an intersection (hereinafter, perception position P) between a line connecting the right eye and the R image and a line connecting the left eye and the L image.

By using an interval E between the left eye and the right eye of the user, a distance D between the user and the display unit110, and difference X between the L image and the R image that are shown inFIG. 3, a distance between the perception position P and the display unit110, that is, extrusion amount S of the perception position P from the display unit110is calculated in accordance with the following numerical formula, for example.

Note that, the interval E between the left eye and the right eye of the user and the distance D between the user and the display unit110can be estimated from a captured image acquired by the imaging unit114. Alternatively, the interval E between the left eye and the right eye of the user and the distance D between the user and the display unit110may be values set in advance.

Note that, the difference X between the L image and the R image can be identified using diverse ways. For example, the extrusion-amount calculation unit120can identify the difference X by using a stereo matching method of extracting feature points in the L image and the R image and measuring gaps between the feature points. More specifically, the stereo matching method includes a feature-based method and an area-based method. The feature-based method extracts edges in an image on the basis of brightness values, extracts edge strengths and edge directions as feature points, and measures gaps between similar edge points. The area-based method analyses a degree of matching of patterns for every certain image area, and measures gaps between similar image areas.

Note that, the example in which the extrusion amount is the distance between the perception point P and the display unit110has been explained in the above description. However, the present embodiment is not limited thereto. For example, an angle of convergence θ shown inFIG. 3may be used as the extrusion amount. Note that, the extrusion-amount calculation unit120may divide a 3D video signal for unit time and may calculate an average of the extrusion amount in a section.

The display-type determination unit124determines whether sufficient stereoscopic effect can be obtained when 3D display is performed on the basis of the 3D video signal. Subsequently, in a case where it has been determined that the sufficient stereoscopic effect is obtained, the display-type determination unit124instructs the display control unit132to perform the 3D display. On the other hand, in a case where it has been determined that the sufficient stereoscopic effect is not obtained even if the 3D display is performed, the display-type determination unit124instructs the display control unit132to perform 2D display.

More specifically, the display-type determination unit124determines, on the basis of the extrusion amount S calculated by the extrusion-amount calculation unit120, whether the sufficient stereoscopic effect is obtained when the 3D display is performed. Here, it is considered that the stereoscopic effect increases as the extrusion amount S calculated by the extrusion-amount calculation unit120becomes bigger. Accordingly, in a case where the extrusion amount S calculated by the extrusion-amount calculation unit120is greater than or equals to a threshold th set by the setting unit128described later, the display-type determination unit124instructs the display control unit132to perform the 3D display. On the other hand, in a case where the extrusion amount S is less than the threshold th, the display-type determination unit124instructs the display control unit132to perform the 2D display.

For example, in a case where a perception position of 3D display based on certain image data is a position P1 shown inFIG. 4, extrusion amount S at the position P1 is less than the threshold th. Accordingly, the display-type determination unit124instructs the display control unit132to perform 2D display based on the certain image data. On the other hand, in a case where the perception position of 3D display based on the certain image data is a position P2 shown inFIG. 4, extrusion amount S at the position P2 is greater than or equals to the threshold th. Accordingly, the display-type determination unit124instructs the display control unit132to perform 3D display based on the certain image data.

The setting unit128sets the threshold used by the display-type determination unit124for determining a display type. For example, in a case where viewing time of the user becomes longer, it is considered that the user accumulates fatigue. Accordingly, the setting unit128may raise the threshold th as the viewing time of the user becomes longer. In such a configuration, it is possible to decrease frequency of 3D display in a case where the viewing time of the user becomes longer. With reference toFIG. 5, specific examples will be given as follows.

FIG. 5is an explanatory diagram showing a relation between a threshold th and viewing time. As shown inFIG. 5, the setting unit128may continuously increase the threshold th as the viewing time becomes longer. In an example inFIG. 5, since extrusion amount S in t1 to t2 exceeds the threshold th, 3D display is performed in t1 to t2. However, near t3 where extrusion amount S is relatively high and where 3D display is performed if the threshold th remains the initial value, since extrusion amount S falls below the increased threshold th, 3D display is not performed. As described above, by continuously increasing the threshold th as the viewing time becomes longer, it becomes difficult to perform 3D display. Accordingly, it is possible to decrease eyestrain of the user.

Note that, the way of setting a threshold th is not limited to the above-described way using viewing time. For example, since it has been worried about effect of 3D video to visual function development of a child user, the setting unit128may determine whether a user is an adult or a child, and in a case where the user is a child, the setting unit128may set the threshold th at a higher value than a case where the user is an adult. Note that, it is possible to estimate whether the user is an adult or a child on the basis of a captured image acquired by the imaging unit114.

Alternatively, the setting unit128may set the threshold value by considering video additional information (for example, a genre of the video and duration) included in a 3D video signal, input from a sensor capable of acquiring a viewing environment, information (eyesight, wearing contacts or glasses, age, distance between eyes) about a living body of the user, a type (a portable device, s stationary device, a screen) of the display device100or the like. In addition, the setting unit128may set the threshold th at a value designated by the user in accordance with user operation.

The display control unit132controls display on the display unit110in accordance with a display type designated by the display-type determination unit124. Specifically, the display control unit132causes the display unit110to perform 3D display based on an L image and an R image in a case where the display type designated by the display-type determination unit124is a 3D display type, or the display control unit132causes the display unit110to perform 2D display based on an L image and an R image in a case where the display type designated by the display-type determination unit124is a 2D display type.

Here, when switching the display type, the display control unit132generates an interpolation image in which difference between the L image and the R image is suppressed, and causes the display unit110to display the interpolation image in a process of switching the display type. In such a configuration, it is possible to switch the display type without the user being aware of the switching. Accordingly, it is possible for a user to ease a burden and incongruity that are associated with the switching.

For example, when switching from the 2D display type to the 3D display type, the display control unit132may reduce difference between the L image and the R image of frames having faster display timing from among a sequence of frames, may gradually ease a degree of suppression of the difference between the L image and the R image, and may achieve continuous switching. Alternatively, it is also possible for the display control unit132to switch the display type in accordance with diverse statistical rules and mathematical rules such as linear interpolation and non-linear interpolation.

Note that, the display control unit132may use another way of easing the burden and the incongruity on the user, which are associated with the switching. For example, when switching from the 2D display type to the 3D display type, the display control unit132can obtain an effect similar to the above by blurring an image having faster display timing from among the sequence of frames and by gradually making the image clear.

(Shutter Control Unit and Infrared Communication Unit)

The shutter control unit136generates a shutter control signal for controlling shutter operation of the shutter glasses200when a display type designated by the display-type determination unit124is the 3D display type. In the shutter glasses200, open/close operation of the right-eye image transparent unit212and the left-eye image transparent unit214is performed on the basis of the shutter control signal generated by the shutter control unit136and emitted from the infrared communication unit140. Specifically, the shutter operation is performed in a manner that the left-eye image transparent unit214opens while the left-eye image is displayed on the display unit110and the right-eye image transparent unit212opens while the right-eye image is displayed on the display unit110.

2-2. Operation of Display Device According to First Embodiment

The configuration of the display device100according to the first embodiment has been explained. Next, with reference toFIG. 6, operation of the display device100according to the first embodiment will be described.

FIG. 6is a flowchart showing operation of the display device100according to the first embodiment. As shown inFIG. 6, a 3D video signal is first input to the extrusion-amount calculation unit120(S204). Subsequently, on the basis of L image data and R image data included in the 3D video signal, the extrusion-amount calculation unit120calculates extrusion amount S of an image in a case where 3D display is performed (S208).

Next, the display-type determination unit124determines whether the extrusion amount S calculated by the extrusion-amount calculation unit120is greater than or equals to a threshold th set by the setting unit128(S212). Subsequently, in a case where the extrusion amount S is less than the threshold th set by the setting unit128(YES in step S212), the display-type determination unit124instructs the display control unit132to perform display using the 2D display type (S216). Accordingly, the display control unit132causes the display unit110to perform the 2D display (S220).

On the other hand, in a case where the extrusion amount S is greater than or equals to the threshold th (NO in step S212), the display-type determination unit124instructs the display control unit132to perform the 3D display (S224). Accordingly, the display control unit132causes the display unit110to perform the 3D display (S228). Subsequently, the display device100repeats the processing of S204to S228until display based on the 3D video signal ends (S232).

The configuration and the operation of the display device100according to the first embodiment of the present disclosure have been explained. Hereinafter, supplemental remarks about the first embodiment will be described.

(Notification of Display Type)

The display control unit132may overlay a notification window for notifying the user of a current display type on a screen. With reference toFIG. 7, specific examples will be given as follows.

FIG. 7is an explanatory diagram showing a specific example of a notification window. As shown inFIG. 7, in a case where the display type is the 2D display type, a notification window30includes a supply-source object32, a 2D-display notification object34, and a device object36. The supply-source object32indicates that a supplied video signal is a 3D video signal, the 2D-display notification object34indicates that a 2D video signal is generated from the 3D video signal, and the device object36indicates that the display device100performs display based on the 2D video signal.

On the other hand, as shown inFIG. 7, in a case where the display type is the 3D display type, a notification window40includes a supply-source object42and a device object46. The supply-source object42indicates that a supplied video signal is a 3D video signal, and the device object46indicates that the display device100performs display based on the 3D video signal. Moreover, the display control unit132performs control in a manner that the notification window30or notification window40is displayed for a certain time when the display type is switched.

On the basis of such a notification window30, the user can easily recognize whether the current display type is the 2D display type or the 3D display type.

Note that, the notification way of the display type is not limited thereto. For example, as shown inFIG. 8, it may be possible that a light-emitting unit112is provided on a front surface of the display device100and the light-emitting unit112emits light in a case where the display type is the 3D display type. In such a configuration, the user can be notified of the display type without disturbing viewing of a content image displayed on the display unit110.

(Control Based on Gaze of User)

While 3D display is performed on the display device100, attention of the user may be shifted to another device such as a mobile device. In this period, flicker occurs when the user sees the another device if the shutter operation of the shutter glasses200continues. In addition, there is little significance of performing the 3D display on the display device100while the user does not see the display device100.

Accordingly, the shutter control unit136may stop the shutter operation of the shutter glasses200in a case where the attention of the user wanders from the display device100. Note that, it is possible to determine whether the attention of the user wanders from the display device100by recognizing gaze of the user from the captured image acquired by the imaging unit114. In such a configuration, the user can use the another device comfortably without taking off the shutter glasses200.

In addition, the display control unit132may stop 3D display on the display unit110in a case where the attention of the user wanders from the display device100. Moreover, the display device100may turn off a power supply of the display device100in the case where the attention of the user wanders from the display device100. In such a configuration, it is possible to reduce power consumption of the display device100.

3. SECOND EMBODIMENT

The first embodiment of the present disclosure has been explained. Next, a second embodiment of the present disclosure will be explained.

FIG. 9is an explanatory diagram showing a configuration of a display device100′ according to a second embodiment. As shown inFIG. 9, the display device100′ according to the second embodiment includes a display unit110, an imaging unit114, an extrusion-amount calculation unit120, a display-type determination unit126, a setting unit128, a display control unit132, a shutter control unit136, an infrared communication unit140, an analysis unit144, and a variation-pattern storage unit148. Since the description is made in “2. First Embodiment,” the repeated descriptions of the display unit110, the imaging unit114, the extrusion-amount calculation unit120, the setting unit128, the display control unit132, and the shutter control unit136will be omitted hereinafter.

The display device100′ according to the second embodiment acquires biological information of a user such as pulses and movement of mimic muscles from a user using device. For example, the shutter glasses200worn by the user acquires biological information of the user, and the infrared communication unit140receives the biological information of the user from the shutter glasses200.

On the basis of changes in the biological information of the user, the analysis unit144analyses an image pattern which causes the user to get fatigue. For example, in a case where the biological information of the user indicates that the user gets fatigue, the analysis unit144analyses a variation pattern of difference (that is, variation pattern of extrusion amount) between an L image and an R image that are displayed when the biological information is acquired. Subsequently, the variation-pattern storage unit148stores the variation pattern acquired from the analysis performed by the analysis unit144. For example, the variation pattern includes a pattern in which an increase and decrease of the extrusion amount is repeated three times in a unit period.

The display-type determination unit126determines whether a variation pattern of extrusion amount calculated by the extrusion-amount calculation unit120matches with a variation pattern stored in the variation-pattern storage unit148. Here, in a case where the variation pattern of the extrusion amount calculated by the extrusion-amount calculation unit120matches with the variation pattern stored in the variation-pattern storage unit148, it is considered that the 3D display causes the user to get fatigue. Accordingly, in the case where the variation pattern of the extrusion amount calculated by the extrusion-amount calculation unit120matches with the variation pattern stored in the variation-pattern storage unit148, the display-type determination unit126instructs the display control unit132to perform 2D display.

According to the above-described second embodiment, it is possible to automatically generate a 3D-display condition tailored to an individual user on the basis of biological information of the user acquired while the user views 3D video, and it is also possible to determine the display type according to the 3D-display condition.

As described above, according to the embodiments of the present disclosure, duration in which the 3D display is performed can be decreased, and eyestrain of the user can be reduced. Further according to the embodiments of the present disclosure, it is possible for a user to ease a burden and incongruity that are associated with the switching since the switching of the display type is continuously performed.

Moreover, according to the embodiments of the present disclosure, power consumption can be reduced since unnecessary 3D display or driving of shutter glasses can be suppressed by estimating a gaze direction of the user. Further, according to the embodiments of the present disclosure, it is possible to automatically generate a 3D-display condition tailored to an individual user on the basis of biological information of the user acquired while the user views 3D video, and it is also possible to determine the display type according to the 3D-display condition.

In addition, the eyestrain of the user from the 3D display can be decreased. Accordingly, it is possible to impress a user who concerns about bad effect of the 3D display with attractions of the 3D display. In this way, the embodiments of the present disclosure can contribute the progress of 3D industry.

For example, it may not be necessary to chronologically execute respective steps in the processing, which is executed by the display device100according to this specification, in the order described in the flowchart. For example, the respective steps in the processing which is executed by display device100may be processed in the order different from the order described in the flow charts, and may also be processed in parallel.

Further, a computer program for causing hardware, such as a CPU, ROM and RAM built into the display device100to exhibit functions the same as each of the elements of the above described display device100can be created. Further, a storage medium on which this computer program is recorded can also be provided.

A display control device including:

an evaluation unit configured to evaluate difference between left-eye image data and right-eye image data which constitute image data; and

a determination unit configured to determine which of a plane display type and a stereopsis display type is used for performing display using the image data, in response to an evaluation result from the evaluation unit.

The display control device according to (1),

wherein the determination unitdetermines that the display is performed using the stereopsis display type in a case where the evaluation unit evaluates the difference as satisfying a threshold condition, anddetermines that the display is performed using the plane display type in a case where the evaluation unit evaluates the difference as not satisfying the threshold condition.
(3)

The display control device according to (2), further including:

a setting unit configured to set the threshold condition.

The display control device according to (3),

wherein the setting unit sets the threshold condition on the basis of continuous use time of a display device by a user of the display device, the display device performing display using the image data.

The display control device according to (4),

wherein the setting unit narrows a range of the difference satisfying the threshold condition as the continuous use time becomes longer.

The display control device according to any one of (3) to (5),

Wherein the setting unit sets the threshold condition on the basis of an attribute of a user of a display device performing display using the image data.

The display control device according to (6),

wherein, in a case where the user is a child, the setting unit narrows a range of the difference satisfying the threshold condition more than the range of the difference satisfying the threshold condition in a case where the user is an adult.

The display control device according to (3),

wherein the setting unit sets the threshold condition in accordance with user operation.

The display control device according to (1), further including:

a storage unit configured to store a specific variation pattern of the difference,

wherein the determination unit performs the determination on the basis of whether or not a variation pattern of difference between left-eye image data and right-eye image data of target image data matches with the specific variation pattern stored in the storage unit.

The display control device according to (8), further including:

an analysis unit configured to analyze left-eye image data and right-eye image data of image data to which biological information of a user shows a specific reaction when display is performed using the stereopsis display type, and then extract the specific variation pattern.

The display control device according to any one of (1) to (10), further including:

a display control unit configured to control display in accordance with a determination result from the determination unit, the display being performed by a display device,

wherein, in a case where a display type is switched between the plane display type and the stereopsis display type, the display control unit generates an interpolation image in which difference between the left-eye image data and the right-eye image data is suppressed, and causes the display device to display the interpolation image in a process of switching the display type.

A display control method including:

evaluating difference between left-eye image data and right-eye image data which constitute image data; and

determining which of a plane display type and a stereopsis display type is used for performing display using the image data, in response to an evaluation result of the difference.

A program causing a computer to function as:

an evaluation unit configured to evaluate difference between left-eye image data and right-eye image data which constitute image data; and

a determination unit configured to determine which of a plane display type and a stereopsis display type is used for performing display using the image data, in response to an evaluation result from the evaluation unit.

The program according to (13),

wherein the determination unitdetermines that the display is performed using the stereopsis display type in a case where the evaluation unit evaluates the difference as satisfying a threshold condition, anddetermines that the display is performed using the plane display type in a case where the evaluation unit evaluates the difference as not satisfying the threshold condition.
(15)

The program according to (14), further causing the computer to function as:

a setting unit configured to set the threshold condition.

The program according to (14) or (15),

wherein the setting unit sets the threshold condition on the basis of continuous use time of a display device by a user of the display device, the display device performing display using the image data.

The program according to any one of (14) to (16),

wherein the setting unit sets the threshold condition on the basis of an attribute of a user of a display device performing display using the image data.

REFERENCE SIGNS LIST