Printing method of printing an image based on the position of a face area detected on the image, a photo-printing system and digital camera adapted to the method

1. A method of outputting through a photo printer an image stored in an image storage device, the method comprising:

setting a temporary printing area on an image to be printed;

determining whether or not an option for Paper-full printing is selected;

if the Paper-full print option is selected, detecting a face area on the image;

determining whether or not the detected face area is included in a printing area; and

according to the determination result, adjusting a printing area so that the face area can be included in the printing area, wherein the adjusting of the printing area comprises:

determining whether or not the aspect ratio of the image and the aspect ratio of the printing material are substantially different from each other; and

moving the printing area according to the determination result, wherein the moving of the printing area comprises:

if the aspect ratio of the image is less than the aspect ratio of the printing material, the printing area is moved upwards or downwards;

if the aspect ratio of the image is greater than the aspect ratio of the printing material, and if a face area in only one of the left and right sides on the image exists outside the printing area, the printing area is moved in a left or right side direction such that the face area is included in the printing area; and

if the aspect ratio of the image is greater than the aspect ratio of the printing material, and if a first face area and a second face area on the left and right sides of the image exist outside the printing area, an area which is excluded from printing is displayed for a user with a warning message.

2. The method of claim 1 , wherein in the moving upwards or downwards of the printing area, the printing area is moved upwards so that the top end of the printing area matches with a second vertical height (Py 2 ) obtained from a first vertical height (Py 1 ) of the eye area in the face area detected from the image, the distance (h 1 ) between the eye area and the mouth area, and a weight (α),

wherein

Py 2 =Py 1 +h 1×α.

3. The method of claim 1 , wherein in the moving of the printing area to the left or right, the printing area is moved to the side where the face area exists outside the printing area.

4. The method of claim 1 , wherein in the displaying of the warning message to the user, a printing area is set according to an input by the user.

5. The method of claim 1 , wherein in the detecting of a face area, information on the position of a face area is extracted and read from Exif information appendant to the image.

6. The method of claim 1 , wherein in the detecting of a face area, the face area is extracted through image processing.