Imaging apparatus, imaging method, and program for executing the imaging method

An imaging method for displaying a photographed image of a subject formed on an imaging surface of an image pickup device on a display screen of a display unit, the imaging method comprising:

• detecting angle information about an angle of the imaging surface of the image pickup device tilted with respect to a horizontal standard that is perpendicular to a gravity direction, based on a reference point on a plane having a photographing direction of the subject as a normal, in a holding location of a body of an imaging apparatus during photographing;
• generating an index mark by rotating the photographed image by the angle based on the reference point according to the angle information;
• and
• displaying the index mark by overlapping the index mark on the photographed image of the display screen of the display unit.

A computer program product, comprising a computer usable medium having a computer readable program code embodied therein, said computer readable program code adapted to be executed to implement an imaging method in a computer, the imaging method comprising:

• detecting angle information about an angle of an imaging surface of an image pickup device tilted with respect to a horizontal standard that is perpendicular to a gravity direction, based on a reference point on a plane having a photographing direction of a subject as a normal, in a holding location of a body of an imaging apparatus during photographing;
• generating an index mark by rotating a photographed image of the subject by the angle based on the reference point according to the angle information, and displaying the index mark by overlapping the index mark on the photographed image of a display screen of a display unit;
• storing the angle information by corresponding the angle information with the photographed image in a frame unit;
• and
• converting an image area provided by the index mark in the photographed image to a horizontal standard image by rotating the image area by the angle, according to the image of the subject and corresponding angle information read from the memory.