Methods and devices for processing images

1. An electronic device for processing images, the electronic device comprising:

a display; and

a controller configured to:

determine a size and position of a block area of a first image;

alter a second image to correspond to the size of the block area of the first image;

determine a duty cycle and an output order associated with alternately displaying the first image and the second image; and

alternately display the first image containing the block area and the second image on the display according to the duty cycle and the output order,

wherein the first image is displayed with the block area and the second image is displayed at a position corresponding to the block area of the first image.

2. The electronic device of claim 1 , further comprising a camera module and a communication module, wherein the controller receives the second image from the camera module or from an external device through the communication module.

3. The electronic device of claim 2 , wherein the camera module is installed on a side of the electronic device opposite the display.

4. The electronic device of claim 1 , wherein the controller determines at least one of a size or position of the block area according to at least one of setting values stored in the electronic device, user input values, and a distance between an eye of a user and the display.

5. The electronic device of claim 1 , wherein the controller alters at least one of a size, position, ratio, magnification or resolution of the second image in accordance with the block area.

6. The electronic device of claim 1 , wherein, when the electronic device is a head-mounted device including left and right lenses, the controller divides the first image into a first left image and a first right image, determines a size or position of the block area, and arranges the block area on at least one of the first left image and the first right image.

7. The electronic device of claim 6 , wherein the controller divides the second image into a second left image and a second right image and alters one of the second left image and the second right image according to the block area.

8. The electronic device of claim 1 , wherein the controller determines a number of successive frames to be output for the first image and for the altered second image and determines the output order on a basis of the determined number of successive frames.

9. The electronic device of claim 1 , wherein the controller adjusts the duty cycle according to a recognition rate of a user, and controls the alternating display of the first image and the altered second image based on the adjusted duty cycle and the output order.

10. A method for processing images in an electronic device, the method comprising:

determining a size and position of a block area of a first image;

altering a second image to correspond to the size of the block area of the first image;

determining a duty cycle and an output order associated with alternately displaying the first image and the second image; and

alternately displaying the first image containing the block area and the second image according to the duty cycle and the output order,

wherein the first image is displayed with the block area and the second image is displayed at a position corresponding to the block area of the first image.

11. The method of claim 10 . wherein the second image is obtained by receiving the second image from a camera module installed in the electronic device or from an external device.

12. The method of claim 11 , wherein the second image is obtained by receiving the second image from the camera module installed on a side of the electronic device opposite a display module.

13. The method of claim 10 , further comprising determining at least one of a size or position of the block area according to at least one of setting values stored in the electronic device, user input values, and a distance between an eye of a user and a display module.

14. The method of claim 10 , wherein the second image is obtained by changing at least one of a size, position, ratio, magnification or resolution of the second image in accordance with the block area.

15. The method of claim 10 , further comprising:

dividing, when the electronic device is a head-mounted device including left and right lenses, the first image into a first left image and a first right image; and

determining a size or position of the block area and arranging the block area on at least one of the first left image and the first right image.

16. The method of claim 15 , wherein the second image is obtained by:

dividing the second image into a second left image and a second fight image; and

altering one of the second left image and the second right image according to the block area.

17. The method of claim 10 , wherein the output order is obtained by:

determining a number of successive frames to be output at one time for the first image or for the altered second image; and

determining the output order on a basis of the determined number of successive frames.

18. The method of claim 10 , wherein the first image and the altered second image are obtained by:

adjusting the duty cycle according to a recognition rate of a user; and

alternatingly displaying the first image and the altered second image on a basis of the adjusted duty cycle and the output order.