Method and apparatus of displaying portrait on display

1. A method for displaying a portrait on a display by a portable terminal, comprising the steps of:

determining a numerical aperture included in Exchangeable Image File Format (Exif) information of a photographed image is less than a reference numerical aperture;

if the numerical aperture is less than the reference numerical aperture, determining the photographed image as a character-photographed image;

executing face detection from the character-photographed image;

setting a character area in a rectangular form in the character-photographed image based on a result of the face detection; and

enlarging and displaying the character area in a form of a new window.

2. The method as claimed in claim 1 , further comprising:

if a photographing mode of a camera, at a time of photographing the photographed image, is a character photographing mode, determining the photographed image as the character-photographed image.

3. The method as claimed in claim 1 , wherein the character area is set in the rectangular form comprising a detected face.

4. The method as claimed in claim 1 , wherein the character area is set in such a manner that a detected face is positioned at a center of the character area.

5. The method as claimed in claim 1 , wherein the character area comprises an entire body of a character corresponding to a detected face.

6. The method as claimed in claim 1 , wherein setting the character area in the character-photographed image based on the result of the face detection comprises:

setting a horizontal length of the character area to a predetermined multiple of a horizontal width of a detected face;

setting a vertical length of the character area to a predetermined multiple of a vertical length of the detected face;

setting a position of abscissa of the character area in such a manner that the detected face is centrally positioned with reference to the position of abscissa; and

setting a position of ordinate of the character area in such a manner that the detected face is positioned at the top of the position of ordinate.

7. The method as claimed in claim 1 , wherein enlarging and displaying the character area in the form of the new window comprises:

enlarging the character area in such a manner that the character area occupies an entire screen.

8. The method as claimed in claim 1 , wherein enlarging and displaying the character area in the form of the new window comprises:

displaying the character-photographed image in such a manner that the character-photographed image occupies an entire screen; and

enlarging and additionally displaying the character area in the form of the new window at a specific part of the screen where the character-photographed image is displayed.

9. The method as claimed in claim 1 , wherein the new window is not overlapped with the character area of the character-photographed image.

10. A portable terminal for displaying a portrait on a display, comprising:

a character image determining unit configured to:

determine a numerical aperture included in Exchangeable Image File Format (Exif) information of a photographed image is less than a reference numerical aperture, and

if the numerical aperture is less than the reference numerical aperture, determine the photographed image as a character-photographed image;

a face detecting unit configured to execute face detection from the character-photographed image;

a character area setting unit configured to set a character area in a rectangular form in the character-photographed image based on a result of the face detection;

a scaler configured to enlarge the character area; and

a display configured to display the enlarged character area in a form of a new window.

11. The portable terminal as claimed in claim 10 , wherein the character image determining unit is further configured to determine the photographed image as the character-photographed image if a photographing mode of a camera, at a time of photographing the photographed image, is a character photographing mode.

12. The portable terminal as claimed in claim 10 , wherein the character area setting unit sets the character area in the rectangular form comprising a detected face.

13. The portable terminal as claimed in claim 10 , wherein the character area setting unit sets the character area in such a manner that a detected face is positioned at a center of the character area.

14. The portable terminal as claimed in claim 10 , wherein the character area comprises an entire body of a character corresponding to a detected face.

15. The portable terminal as claimed in claim 14 , wherein the new window is not overlapped with the character area of the character-photographed image.

16. The portable terminal as claimed in claim 10 , wherein the character area setting unit sets a horizontal length of the character area to a predetermined multiple of a horizontal width of a detected face, sets a vertical length of the character area to a predetermined multiple of a vertical length of the detected face, sets a position of abscissa of the character area in such a manner that the detected face is centrally positioned with reference to the position of abscissa, and sets a position of ordinate of the character area in such a manner that the detected face is positioned at the top of the position of ordinate.

17. The portable terminal as claimed in claim 10 , wherein the display enlarges and displays the character area in such a manner that the character area occupies an entire screen.

18. The portable terminal as claimed in claim 10 , wherein the display displays the character-photographed image in such a manner that the character-photographed image occupies an entire screen, and enlarges and additionally displays the character area in the form of the new window at a specific part of the screen where the character-photographed image is displayed.