KR20180108314A - Method and apparatus for displaying a 3-dimensional image adapting user interaction information - Google Patents

Abstract

According to the present disclosure, a method and apparatus for displaying a stereoscopic image are disclosed. A method for reproducing a stereoscopic image according to an embodiment of the present invention includes the processes of: outputting at least one image including a plurality of sub images and forming a focus by the combination of the plurality of sub images; checking user interaction information for a user who watches the at least one image; correcting the focus by controlling the plurality of sub images included in the at least one image based on the user interaction information; and outputting the at least one image whose focus is corrected. Accordingly, the present invention can efficiently configure and reproduce an image reflecting a user interaction.

Description

TECHNICAL FIELD [0001] The present invention relates to a method and an apparatus for reproducing a stereoscopic image by reflecting user interaction information,

This disclosure relates to a stereoscopic image display method and apparatus, and more particularly, to a method and apparatus for controlling a stereoscopic image by reflecting a user's interaction.

Various visual factors are influencing the human perception of 3D stereoscopic vision. Typical examples are as follows. Since human beings have eyes on each side, binocular disparity information is generated from the observed images of the external world, which is perceived as a 3D stereoscopic image in the brain. The principle of stereoscopic effect by binocular disparity is applied to a popular 3D stereoscopic display device. The display device outputs the image to be input to both eyes of the user, and the user can watch the 3D stereoscopic image content by wearing a device (for example, 3D stereoscopic glasses) for separating left and right images corresponding to the respective eyes.

Various display devices capable of applying the stereoscopic image technique have been studied, and in particular, the development of a stereoscopic image display device in the form of a wearable display by the fusion with the virtual reality / augmented reality / It is actively proceeding.

Adjusting the direction of the scene or object included in the stereoscopic image according to the user's behavior, that is, moving or moving the user, or adjusting the focus is indispensable for maximizing the realism of the stereoscopic image.

However, in order to adjust the output of the stereoscopic image in response to the user's behavior, there is a problem that a lot of data processing and calculation are required because operations such as reconstructing the image data must be performed in accordance with the user's behavior.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for efficiently constructing and reproducing an image reflecting a user's interaction.

It is another object of the present invention to provide a method and apparatus for implementing a stereoscopic image reflecting user's interaction while minimizing data processing or arithmetic processing.

The technical objects to be achieved by the present disclosure are not limited to the above-mentioned technical subjects, and other technical subjects which are not mentioned are to be clearly understood from the following description to those skilled in the art It will be possible.

According to one aspect of the present disclosure, a stereoscopic image reproducing method can be provided. The method includes the steps of outputting at least one image including a plurality of sub images and forming a focus by a combination of the plurality of sub images, and displaying user interaction information for a user viewing the at least one image The method comprising the steps of: controlling the plurality of sub-images included in the at least one image based on the user interaction information to correct the focus; and outputting the at least one image with the focus corrected, .

According to another aspect of the present disclosure, a stereoscopic image reproducing apparatus can be provided. The apparatus includes a stereoscopic image display unit for outputting a stereoscopic image having at least one image forming a focus by a combination of a plurality of sub images, a display unit for displaying a stereoscopic image, An interaction information confirmation unit and a focus control unit for controlling the plurality of sub images based on the user interaction information to correct the focus.

The features briefly summarized above for this disclosure are only exemplary aspects of the detailed description of the disclosure which follow, and are not intended to limit the scope of the disclosure.

According to the present disclosure, a method and apparatus capable of efficiently constructing and reproducing an image reflecting a user's interaction can be provided.

In addition, according to the present disclosure, a method and an apparatus capable of realizing a stereoscopic image reflecting a user's interaction while minimizing data processing and arithmetic processing can be provided.

The effects obtainable from the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below will be.

1 is a block diagram showing a configuration of a stereoscopic image reproducing apparatus according to an embodiment of the present disclosure.
2 is a diagram illustrating a stereoscopic image output method that is output by a display unit included in a stereoscopic image reproducing apparatus according to an embodiment of the present disclosure.
FIG. 3 is a diagram illustrating image information constituting a stereoscopic image output in FIG.
4 is a diagram illustrating a stereoscopic image combined by a plurality of sub images of FIG.
5 is a diagram illustrating an operation of a focus control unit included in a stereoscopic image reproducing apparatus according to an embodiment of the present disclosure.
6 is a diagram illustrating a stereoscopic image output by the stereoscopic image reproducing apparatus according to an embodiment of the present disclosure.
7 is a flowchart showing a procedure of a stereoscopic image reproducing method according to an embodiment of the present disclosure.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, which will be easily understood by those skilled in the art. However, the present disclosure may be embodied in many different forms and is not limited to the embodiments described herein.

In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present disclosure rather unclear. Parts not related to the description of the present disclosure in the drawings are omitted, and like parts are denoted by similar reference numerals.

In the present disclosure, when an element is referred to as being "connected", "coupled", or "connected" to another element, it is understood that not only a direct connection relationship but also an indirect connection relationship May also be included. Also, when an element is referred to as " comprising "or" having "another element, it is meant to include not only excluding another element but also another element .

In the present disclosure, the terms first, second, etc. are used only for the purpose of distinguishing one element from another, and do not limit the order or importance of elements, etc. unless specifically stated otherwise. Thus, within the scope of this disclosure, a first component in one embodiment may be referred to as a second component in another embodiment, and similarly a second component in one embodiment may be referred to as a first component .

In the present disclosure, the components that are distinguished from each other are intended to clearly illustrate each feature and do not necessarily mean that components are separate. That is, a plurality of components may be integrated into one hardware or software unit, or a single component may be distributed into a plurality of hardware or software units. Thus, unless otherwise noted, such integrated or distributed embodiments are also included within the scope of this disclosure.

In the present disclosure, the components described in the various embodiments are not necessarily essential components, and some may be optional components. Thus, embodiments consisting of a subset of the components described in one embodiment are also included within the scope of the present disclosure. Also, embodiments that include other elements in addition to the elements described in the various embodiments are also included in the scope of the present disclosure.

The terms used in the context of this disclosure are defined as follows.

The user interaction information is information used to control the focus of the stereoscopic image and includes information indicating a direction in which the user's gaze is viewed and an area in which the user's gaze is viewed.

A stereoscopic image includes a plurality of subimages considering a parallax in a horizontal or vertical direction and parallax. Accordingly, each of the plurality of sub images includes different parallaxes in the horizontal or vertical direction.

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

1 is a block diagram showing a configuration of a stereoscopic image reproducing apparatus according to an embodiment of the present disclosure.

Referring to FIG. 1, a stereoscopic image reproducing apparatus according to an embodiment of the present disclosure may include a display unit 11, a user interaction information confirmation unit 13, and a focus control unit 15.

The display unit 11 may include a display panel for outputting the input stereoscopic image data. In particular, the display unit 11 includes two left and right display panels for displaying three-dimensional stereoscopic images, a parallax barrier for separating the parallax, a lenticular lens, a micro lens, And the like can be used.

FIG. 2 is a diagram illustrating a stereoscopic image output method that is output by a display unit included in the stereoscopic image reproducing apparatus according to an embodiment of the present disclosure. FIG. 3 is a diagram illustrating a stereoscopic image output method of FIG. Fig.

2, the display unit 11 includes a left and right eye display panel 110L and a right eye display panel 110R corresponding to the left and right eyes, respectively. The left and right eye display panel 110L and the right eye display panel 110R And a left eye lens 112L and a right eye lens 112R which are respectively provided between the left eye lens 110R and the right eye lens 110R.

With this structure, the left image 200L output from the left eye display panel 110L is provided to the left eye of the user through the left eye lens 112L, and the right image 200R output from the right eye display panel 110R And can be provided to the right eye of the user through the right eye lens 112R. The focal lengths 120L and 120R of the left eye lens 112L and the right eye lens 112R are set such that focal lengths 120L and 120R are different between the left eye display panel 110L and the right eye display panel 110R and between the left eye lens 112L and the right eye lens 112R 130L and 130R, respectively.

According to this configuration, the user can recognize that the left image 200L and the right image 200R are formed on a virtual image plane 150. [

Further, the left image 200L and the right image 200R may include at least one object. The at least one object forms a predetermined disparity in the left image 200L and the right image 200R can do. As described above, the at least one object can be perceived relatively closer to the imaginary plane 150 due to the parallax in the left image 200L and the right image 200R.

The stereoscopic image realization method by the parallax in the left image 200L and the right image 200R is a method of providing a stereoscopic image based on a single view. Further, the left-eye display panel 110L and the right-eye display panel 110R may each have at least one parallax barrier for a multi-view image, Can be implemented.

The parallax in the horizontal direction is illustrated through the disparity and the motion parallax in the left and right images 200L and 200R in the embodiment described above. However, in the light-field, In order to express a full-parallax image, an image that can reflect a vertical parallax is required.

Accordingly, each of the left image 200L and the right image 200R may have a sub-image capable of providing parallax in the horizontal and vertical directions.

Referring to FIG. 3 illustrating image information constituting a stereoscopic image, a stereoscopic image may include a plurality of sub images 301, 302, 303, and 304. FIG. The plurality of sub images are based on the parallax in the horizontal and vertical directions constituting the image. The number of sub-images included in the stereoscopic image may correspond to the product of the number of the horizontal direction viewpoints and the number of viewpoints in the vertical direction.

For example, a stereoscopic image may include an epipolar plane image (EPI) image.

In Fig. 3, the X and Y axes indicate horizontal and vertical resolutions. For example, if the View axis indicates a horizontal viewpoint, X represents a horizontal resolution, Y axis represents an equation resolution, X represents a vertical resolution when the View axis is a vertical point, and Y axis represents a horizontal resolution.

In addition, at least one object may be provided in the stereoscopic image, and at least one object may have different parallaxes D1, D2, and D3 among the plurality of sub images 301, 302, 303, have.

4 is a diagram illustrating a stereoscopic image 400 combined by the plurality of sub images 301, 302, 303, and 304 of FIG.

The plurality of sub images 301, 302, 303 and 304 may include a first object 410 and a second object 420. The first object 410 includes a plurality of sub images 301, 302, 303 and 304 and the second object 420 may be provided with predetermined parallaxes D1, D2 and D3 in the plurality of sub images 301, 302, 303 and 304 . Accordingly, the region where the first object 410 exists in the stereoscopic image 400 can be presented as a focused point of view, and the region in which the second object 420 exists is presented as an out-of-focus region .

Meanwhile, the user interaction information confirmation unit 13 can confirm the user interaction information.

In one embodiment of the present disclosure, the user interaction information is information used to control the focus of a stereoscopic image, and includes information indicating a direction in which the user's gaze is viewed and an area in which the user's gaze is viewed .

The user interaction information may include information indicating the head position of the user and the head direction of the user.

In addition, the user interaction information may include information indicating the position of the user's pupil, the size of the pupil, and the direction of the pupil.

The display unit 11 may include an HMD (Head Mounted Display) as a personal terminal. The user interaction information confirmation unit 13 may include a motion sensor capable of confirming movement in three axial directions, And a motion confirmation unit for confirming the direction of the user's gaze based on the sensor data and the information indicating the area viewed by the user's gaze.

As another example, the display portion 11 may include a display device of a predetermined size. In this case, the user interaction information confirmation unit 13 detects a user's specific area (e.g., head area) from a camera that photographs a user looking at the display unit 11 and an image photographed from the camera, And a motion confirmation unit for detecting movement of the area and confirming a direction in which the user's gaze is viewed and an area in which the user's gaze is viewed. The motion confirmation unit may detect an area where a user's eye (or a pupil) is located, and detect the size of the pupil and the direction of the pupil.

The focus control unit 15 detects a sub-image at a time point corresponding to the user interaction information confirmed by the user interaction information confirmation unit 13. The focus control unit 15 controls the focus of the stereoscopic image output through the display unit 11 by controlling the output of the sub-image.

For example, the focus control unit 15 may detect a sub-image at a time point corresponding to a direction in which the user's gaze is confirmed by the user interaction information confirmation unit 13 and an area viewed by the user's gaze. The sub-image may include at least one sub-image to be output as a left image and at least one sub-image to be output as a right image. Thus, by controlling the output positions of at least one sub-image included in the left image and at least one sub-image included in the right image, the focus of at least one object included in the stereoscopic image can be adjusted. At this time, the focus control unit 15 controls the main viewpoint of the sub-image included in the left image and the sub-image included in the right image, or the sub-image included in the left image and the sub- So that the focus of at least one object included in the stereoscopic image can be adjusted.

5 is a diagram illustrating an operation of a focus control unit included in a stereoscopic image reproducing apparatus according to an embodiment of the present disclosure.

The focus control unit 15 includes a plurality of sub images 510L-1, 510L-2, 510L-3, ... 510L-n, n being positive integers provided in the left image included in the stereoscopic image, A direction in which a user's gaze seen by the user interaction information confirmation unit 13 is viewed from a plurality of sub images 510R-1, 510R-2, 510R-3, ... 510R- Sub-images 510L-1, 510L-2, and 510L-3 included in the left image, and sub-images 510L-1 and 510L-2 and 510L-3 included in the right image, (510R-1, 510R-2, 510R-3). The focus control unit 15 receives the sub images 510L-1, 510L-2 and 510L-3 provided in the left image and the plurality of sub images 510R-1, 510R- 3) may shift each line so that the region corresponding to the main viewpoint is vertically aligned.

The focus control unit 15 includes sub-images 510L-1, 510L-2, and 510L-3 included in the left and right images, and a plurality of sub-images 510R-1 and 510R- 2, and 510R-3.

In this manner, the sub images 510L-1, 510L-2, and 510L-3 included in the left and right images shifted and aligned and the plurality of sub images 510R-1, 510R- -3), the focus of the object included in the stereoscopic image can be adjusted (see FIG. 6).

In addition, the focus control unit 15 generates sub-images 510L-1, 510L-2, and 510L-3 included in the left and right images, 510L-2 ', 510L-3', 510R-1 ', 510R-2', and 510R-3 'for the virtual viewpoint through the interpolation operation using the sub- 510R-3 '). Then, the focus control unit 15 may process the filtering for at least one sub-image with respect to the virtual viewpoint.

In addition, the focus control unit 15 adjusts the sub-images 510L-1 and 510L-2 (see FIG. 5) provided in the left image in which the viewpoint is shifted and aligned by reflecting the direction in which the user's gaze is viewed, 510L-3, 510L-1, 510R-2, and 510R-3 included in the right image and crops and combines the sub images.

Further, the focus control unit 15 may crop and combine the sub-image generated by interpolation and filtering to reconstruct the sub-image.

7 is a flowchart showing a procedure of a stereoscopic image reproducing method according to an embodiment of the present disclosure.

The stereoscopic image reproducing method according to an embodiment of the present disclosure can be performed by the above-described stereoscopic image reproducing apparatus. The stereoscopic image reproducing apparatus includes two left and right display panels, a parallax barrier, a lenticular lens, a micro lens, a light source, and the like for separating the parallax to display three-dimensional stereoscopic images. May include a device for use

Referring to FIG. 7, the stereoscopic image reproducing apparatus can confirm and output stereoscopic image data (S701). The stereoscopic image may include at least one sub-image.

The stereoscopic image may have a sub-image required for providing parallax in the horizontal and vertical directions. Furthermore, the stereoscopic image may include a left image provided in the left eye of the user and a right image provided in the right eye of the user, and the left image and the right image may each include a sub image.

In this environment, the stereoscopic image reproducing apparatus can confirm the sub images required for outputting the stereoscopic image. Since the plurality of sub images are based on parallaxes in horizontal and vertical directions constituting an image, the number of sub images included in the stereoscopic image may correspond to a product of the number of horizontal direction views and the number of view points in the vertical direction .

For example, the stereoscopic image may be illustrated in FIGS. 3 and 4. FIG. At least one object may be included in the stereoscopic image, and at least one object may have different parallaxes D1, D2, and D3 among the plurality of sub images 301, 302, 303, and 304. [ The focus of the object provided in the stereoscopic image 400 can be controlled by the parallax of the sub images 301, 302, 303, For example, a plurality of sub images 301, 302, 303 and 304 may include a first object 410 and a second object 420. The first object 410 may include a plurality of sub images 301, And the second object 420 is provided with the predetermined parallaxes D1, D2 and D3 in the plurality of sub images 301, 302, 303 and 304 . Accordingly, the region where the first object 410 exists in the stereoscopic image 400 can be presented as a focused point of view, and the region in which the second object 420 exists is presented as an out-of-focus region .

On the other hand, in step S702, the stereoscopic image reproducing apparatus can confirm user interaction information.

In one embodiment of the present disclosure, the user interaction information is information used to control the focus of a stereoscopic image, and includes information indicating a direction in which the user's gaze is viewed and an area in which the user's gaze is viewed .

The user interaction information may include information indicating the head position of the user and the head direction of the user.

In addition, the user interaction information may include information indicating the position of the user's pupil, the size of the pupil, and the direction of the pupil.

The stereoscopic image reproducing apparatus may be provided in the form of an HMD (Head Mounted Display) which is a personal terminal, and may include a motion sensor capable of confirming movement in three axial directions. Accordingly, the stereoscopic image reproducing apparatus can confirm the direction in which the user's gaze is viewed based on the sensor data detected from the motion sensor, and the information indicating the area viewed by the user's gaze.

As another example, the stereoscopic image reproducing apparatus may include a display device of a predetermined size. In this case, the stereoscopic image reproducing apparatus detects a specific region (e.g., a head region) of the user from a camera that photographs a user and an image photographed by the camera, detects movement of the specific region, It is possible to confirm the direction of viewing and the information indicating the area viewed by the user's gaze. Further, the stereoscopic image reproducing apparatus may detect an area where a user's eye (or a pupil) is located from an image photographed by the camera, and detect the size of the pupil and the direction of the pupil.

Next, the stereoscopic image reproducing apparatus detects a sub image at a time corresponding to the user interaction information (S703), and reconstructs the sub image according to the user interaction information (S704).

Specifically, the stereoscopic image reproducing apparatus can detect a sub-image at a time point corresponding to a direction in which the verified user's gaze is viewed and an area in which the user's gaze is viewed. The sub-image may include at least one sub-image to be output as a left image and at least one sub-image to be output as a right image. In this way, the sub-image can be reconstructed by controlling the output position, output size, arrangement, and the like of at least one sub-image included in the left image and at least one sub-image included in the right image.

Thus, by adjusting the sub-image in step S704, the focus of at least one object included in the stereoscopic image can be adjusted.

Referring to FIG. 5, the operation of steps S703 and S704 will be illustrated in more detail.

The stereoscopic image reproducing apparatus includes a plurality of sub images 510L-1, 510L-2, 510L-3, ..., 510L-n provided in the left image included in the stereoscopic image, 510L-1, 510L-2, 510R-3, ... 510R-n included in the left image corresponding to the user interaction information, for example, 2, 510L-3) and a plurality of sub images 510R-1, 510R-2, 510R-3 included in the right image.

The stereoscopic image reproducing apparatus includes sub images 510L-1, 510L-2 and 510L-3 provided in the left image and a plurality of sub images 510R-1, 510R-2 and 510R- The sub-image in which each line is shifted so that the region corresponding to the main viewpoint is aligned in the vertical direction can be reconstructed.

In addition, the stereoscopic image reproducing apparatus includes sub images 510L-1, 510L-2, and 510L-3 included in a left image shifted and aligned and a plurality of sub images 510R-1 and 510L- -2, and 510R-3), it is possible to generate at least one sub-image with respect to the virtual viewpoint, and process the filtering on the generated sub-image to reconstruct the sub-image.

In addition, the stereoscopic image reproducing apparatus includes sub images 510L-1, 510L-2, 510L-3, and 510R (see FIG. 5) in which the point of interest is moved and aligned in accordance with the direction in which the user's gaze is viewed, The sub-image generated by interpolating and filtering at least one sub-image with respect to the virtual viewpoint is cut out, Cropping, and adding sub-images.

In step S705, the stereoscopic image including the sub-image reconstructed through the above-described operation can be output.

By constructing and outputting the stereoscopic image including the reconstructed sub-image by reflecting the user interaction information, the stereoscopic image can be adjusted by adjusting the focus of the object included in the image or adjusting the output area of the image .

According to the present disclosure, it is possible to provide a stereoscopic image capable of continuously changing the parallax and focus through a relatively small calculation process in an apparatus for displaying a stereoscopic image, in particular, a personal realistic display apparatus such as an HMD, It is possible to provide a virtual reality service having a large immersion effect and small viewing fatigue.

Although the exemplary methods of this disclosure are represented by a series of acts for clarity of explanation, they are not intended to limit the order in which the steps are performed, and if necessary, each step may be performed simultaneously or in a different order. In order to implement the method according to the present disclosure, the illustrative steps may additionally include other steps, include the remaining steps except for some steps, or may include additional steps other than some steps.

The various embodiments of the disclosure are not intended to be all-inclusive and are intended to illustrate representative aspects of the disclosure, and the features described in the various embodiments may be applied independently or in a combination of two or more.

In addition, various embodiments of the present disclosure may be implemented by hardware, firmware, software, or a combination thereof. In the case of hardware implementation, one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays A general processor, a controller, a microcontroller, a microprocessor, and the like.

The scope of the present disclosure is to be accorded the broadest interpretation as understanding of the principles of the invention, as well as software or machine-executable instructions (e.g., operating system, applications, firmware, Instructions, and the like are stored and are non-transitory computer-readable medium executable on the device or computer.

Claims (14)

Outputting at least one image including a plurality of sub-images and forming a focus by a combination of the plurality of sub-images;
Checking user interaction information for a user viewing the at least one image;
Controlling the plurality of sub-images included in the at least one image based on the user interaction information to correct the focus;
And outputting the at least one image with the focus corrected.
The method according to claim 1,
The process of confirming the user interaction information includes:
And checking a direction of the user's gaze and a range of an area viewed by the user's gaze.
The method according to claim 1,
The process of confirming the user interaction information includes:
Confirming information indicating the head position of the user and the head direction of the user;
A step of checking the direction of the user's gaze corresponding to the information indicating the head position of the user, the head direction of the user, and the range of the area viewed by the user's gaze .
The method according to claim 1,
The process of confirming the user interaction information includes:
Confirming information indicating the position of the user's pupil, the size of the pupil, and the direction of the pupil;
Determining a direction of the user's gaze corresponding to information indicating the position of the user's pupil, a size of the pupil, and a direction of the pupil, and a range of an area viewed by the user's gaze, A method for reproducing an image.
3. The method of claim 2,
Wherein the step of correcting the focus information of the at least one image comprises:
Confirming a relationship between a line of sight of the user and an object included in the sub-image;
Detecting a sub-image corresponding to a direction in which the user's gaze is viewed and a range of an area viewed by the user's gaze;
Adjusting the sub-image according to a direction of the user's gaze and an area of the user's gaze;
And constructing the at least one image having the adjusted sub-image.
3. The method of claim 2,
Wherein the step of correcting the focus information of the at least one image comprises:
The sub-image corresponding to the direction in which the user's gaze is viewed and the range of the region in which the user's gaze is viewed is detected and the direction in which the gaze of the user is viewed, Cutting out a partial area included in the detected sub-image,
And constructing the at least one image having a partial region included in the sub-image.
The method according to claim 1,
Wherein the at least one image comprises:
And at least one left image and right image are included.
A stereoscopic image display unit for outputting a stereoscopic image having at least one image forming a focus by a combination of a plurality of sub images,
A user interaction information confirmation unit for confirming user interaction information for a user viewing the stereoscopic image,
And a focus control unit for controlling the focus by controlling the plurality of sub images based on the user interaction information.
9. The method of claim 8,
The user interaction information verifying unit,
Wherein the user interaction information identifies the direction in which the user's gaze is viewed and the range in which the user's gaze is viewed.
9. The method of claim 8,
The user interaction information verifying unit,
The information indicating the head position of the user and the head direction of the user,
Wherein the controller identifies the head position of the user, the direction of the user's gaze corresponding to the information indicating the head direction of the user, and the area viewed by the user's gaze.
9. The method of claim 8,
The user interaction information verifying unit,
Confirming information indicating the position of the user's pupil, the size of the pupil, and the direction of the pupil,
Wherein the direction of the user's gaze corresponding to the information indicating the position of the pupil of the user, the size of the pupil, and the direction of the pupil, and the range of the region viewed by the user's gaze are confirmed. A video playback device.
10. The method of claim 9,
Wherein the focus control unit includes:
Checking a relationship between the user's line of sight and an object included in the sub-image,
Detecting a sub-image corresponding to a direction in which the user's gaze is viewed and a range of an area viewed by the user's gaze,
Adjusts the sub-image according to a direction in which the user's gaze is viewed and an area in which the user's gaze is viewed,
Wherein the at least one image comprises the adjusted sub-image.
10. The method of claim 9,
Wherein the focus control unit includes:
The sub-image corresponding to the direction in which the user's gaze is viewed and the range of the region in which the user's gaze is viewed is detected and the direction in which the gaze of the user is viewed, Extracts a partial area included in the detected sub-image,
Wherein the at least one image includes a partial region included in the sub-image.
9. The method of claim 8,
Wherein the at least one image comprises:
Wherein the stereoscopic image includes at least one left image and right image.

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