Image photographing apparatus and method for controlling the same

1. A method for controlling an image photographing apparatus, the method comprising:

outputting light so as to pass through a projection and be incident on an object;

receiving first light reflected from the object after passing through the projection;

obtaining a first image based on information of the first reflected light;

controlling the projection using predetermined information to generate a controlled projection through which the output light passes and falls on the object;

receiving second light reflected from the object after passing through the controlled projection;

obtaining a second image based on information of the second reflected light; and

generating a depth map using the obtained first image and the obtained second image.

2. The method as claimed in claim 1 , wherein the projection comprises a material having a shape capable of being changed depending upon an electrical signal,

wherein the controlling of the projection comprises controlling a shape of the projection by adjusting a strength of an electrical signal supplied to the projection.

3. The method as claimed in claim 2 , wherein the controlling of the projection comprises supplying different electrical signals to different areas of the projection.

4. The method as claimed in claim 1 , wherein the controlling of the projection comprises minutely controlling variation of the projection as resolution of a light input unit is greater than a threshold resolution.

5. The method as claimed in claim 1 , wherein the obtaining of the first image comprises obtaining the first image by comparing the information of the first reflected light with a location, pattern, and size of the projection,

wherein obtaining the second image comprises obtaining the second image by comparing the information of the second reflected light with a location, pattern, and size of the controlled projection.

6. The method as claimed in claim 1 , wherein the controlling of the projection comprises controlling the projection to correspond to a received command for controlling the projection.

7. The method as claimed in claim 1 , wherein the information of the first reflected light comprises one or more of a pattern of the first reflected light, a reflected position of the first reflected light, and a time required for the first reflected light to be input after being reflected from the object.

8. The method as claimed in claim 1 , wherein the controlling of the projection comprises moving a location of the projection.

9. The method as claimed in claim 1 , wherein the projection comprises a plurality of slits,

wherein the controlling of the projection comprises controlling the projection by adjusting one or more of a width of the plurality of slits and an angle of the projection for controlling an incident angle at which the output light is incident on the plurality of slits.

10. The method as claimed in claim 1 , wherein the light is infrared (IR) light.

11. An image photographing apparatus comprising:

a light output unit comprising light output circuitry, the light output unit configured to output light so as to pass through a projection and be incident on an object;

a light input unit comprising light receiving circuitry, the light input unit configured to receive first light reflected from an object after passing through the projection and to receive second light reflected from the object after passing through a controlled projection; and

a controller configured to obtain a first image based on information of the first reflected light, to control the projection using predetermined information to generate the controlled projection, to obtain a second image based on information of the second reflected light, and to generate a depth map using the obtained first image and second image.

12. The apparatus as claimed in claim 11 , wherein the projection comprises a material having a shape capable of being changed depending upon an electrical signal,

wherein the controller is configured to control a shape of the projection by adjusting a strength of an electrical signal supplied to the projection.

13. The apparatus as claimed in claim 12 , wherein the controller is configured to supply different electrical signals to different areas of the projection.

14. The apparatus as claimed in claim 11 , wherein the controller is configured to control variation of the projection minutely as resolution of a light input unit is greater than a threshold resolution.

15. The apparatus as claimed in claim 11 , wherein the controller is configured to obtain the first image by comparing the information of the first reflected light with a location, pattern, and size of the projection and to obtain the second image by comparing the information of the second reflected light with a location, pattern, and size of the controlled projection.

16. The apparatus as claimed in claim 11 , wherein the controller is configured to control the projection to correspond to a received command for controlling the projection.

17. The apparatus as claimed in claim 11 , wherein the information of the first reflected light comprises one or more of a pattern of the first reflected light, a reflected position of the first reflected light, and a time required for the first reflected light to be input after being reflected from the object.

18. The apparatus as claimed in claim 11 , wherein the controller is configured to move a location of the projection.

19. The apparatus as claimed in claim 11 , wherein the projection comprises a plurality of slits,

wherein the controller is configured to control the projection by adjusting one or more of a width of the plurality of slits and an angle of the projection for controlling an incident angle at which the output is incident on the plurality of slits.

20. The apparatus as claimed in claim 11 , wherein the light is infrared (IR) light.