Image display device and method of operating the same

1. An image display device configured to display an image of 360 degrees, the image display device comprising:

a display; and

a controller configured to:

generate an image of 360 degrees in a spherical shape by mapping an image of 360 degrees in a planar shape to a sphere, the spherical-shaped 360 degree image being represented in a first color space,

extract a portion from the spherical-shaped 360 degree image and store the extracted portion of the spherical-shaped 360 degree image in a graphics buffer, the extracted portion of the spherical-shaped 360 degree image being represented in the first color space,

convert a color space of only the extracted portion of the spherical-shaped 360 degree image from the first color space to a second color space to perform image quality processing,

perform image quality processing on only the extracted portion of the spherical-shaped 360 degree image in the second color space, and

control the display to display the extracted portion of the spherical-shaped 360 degree image on which the image quality processing has been performed.

2. The image display device of claim 1 , wherein the planar-shaped 360 degree image is expressed as a YUV color space, and the spherical-shaped 360 degree image is expressed as an RGB color space, and

wherein the controller is further configured to convert a color space of the extracted portion of the spherical-shaped 360 degree image into the YUV color space from the RGB color space and to perform image quality processing on the extracted portion of the spherical-shaped 360 degree image converted into the YUV color space.

3. The image display device of claim 2 , wherein the controller is further configured to perform image quality processing on an image corresponding to the extracted portion, wherein the image quality processing comprises at least one of: an enhancement of a definition, a reduction of jagged edges, an enhancement of a contrast ratio, an improvement of a color, and reducing juddering.

4. The image display device of claim 2 , wherein the controller is further configured to adjust a scale of an image corresponding to the extracted portion converted into the YUV color space.

5. The image display device of claim 1 , wherein the controller comprises:

a graphics processor configured to generate the spherical-shaped 360 degree image by mapping the planar-shaped 360 degree image to the sphere; and

a video processor configured to perform image quality processing on the extracted portion of the spherical-shaped 360 degree image,

wherein the video processor is further configured to adjust a scale of the 360 degree image displayed on the display.

6. The image display device of claim 1 , wherein the controller is further configured to control a frame rate used to input the extracted portion of the spherical-shaped 360 degree image stored in the graphics buffer to an image quality processor configured to perform image quality processing.

7. The image display device of claim 1 , wherein the planar-shaped 360 degree image is expressed as a YUV color space, and the spherical-shaped 360 degree image is expressed as an RGB color space, and

wherein the image display device further comprises:

a color space converter comprising color space conversion circuitry configured to convert the color space of the extracted portion of the spherical-shaped 360 degree image into the YUV color space from the RGB color space.

8. A method of operating an image display device configured to display an image of 360 degrees, the method comprising:

generating an image of 360 degrees in a spherical shape by mapping an image of 360 degrees in a planar shape to a sphere, the planer-shaped 360 degree image being in a first color space;

extracting a portion from the spherical-shaped 360 degree image and store the extracted portion of the spherical-shaped 360 degree image in a graphics buffer, the extracted portion of the spherical-shaped 360 degree image being represented in the first color space;

converting a color space of only the extracted portion of the spherical-shaped 360 degree image from the first color space to a second color space to perform image quality processing;

performing image quality processing on only the extracted portion of the spherical-shaped 360 degree image in the second color space; and

displaying the extracted portion of the spherical-shaped 360 degrees image on which the image quality processing has been performed.

9. The method of claim 8 , wherein the planar-shaped 360 degree image is expressed as a YUV color space, and the spherical-shaped 360 degree image is expressed as an RGB color space, and

wherein the method further comprises: converting a color space of the extracted portion of the spherical-shaped 360 degree image into the YUV color space from the RGB color space,

wherein the performing of the image quality processing comprises: performing the image quality processing on the extracted portion of the spherical-shaped 360 degree image converted into the YUV color space.

10. The method of claim 9 , wherein the performing of the image quality processing comprises: performing image quality processing on an image corresponding to the extracted portion, wherein image quality processing comprises at least one of: an enhancement of a definition, a reduction of jagged edges, an enhancement of a contrast ratio, an improvement of a color, and reducing juddering.

11. The method of claim 9 , further comprising: adjusting a scale of an image corresponding to the extracted portion converted into the YUV color space.

12. The method of claim 8 , further comprising: controlling a frame rate used to input the extracted portion of the spherical-shaped 360 degree image stored in the graphics buffer to an image quality processor configured to perform image quality processing.

13. A non-transitory computer readable recording medium storing a program for executing the method of claim 8 on a computer.