Image processing apparatus, image processing method and image processing program
An image processing apparatus includes a face direction estimating unit that estimates the direction and the degree of turn of a face with the front direction of the face included in a face image used as a reference for a target image that includes the face image, and an area setting unit that changes a first area based on the direction and the degree of turn of the face and sets a correction target area with the changed first area used as a reference when an area that includes the first area is set as the correction target area with the first area that includes predetermined facial organs of the face image used as a reference.
1. An image processing apparatus comprising:
a face direction estimating unit that estimates the direction and the degree of turn of a face with the front direction of the face included in a face image used as a reference for a target image that includes the face image; and
an area setting unit that changes a first area based on the direction and the degree of turn of the face and sets a correction target area with the changed first area used as a reference when an area that includes the first area is set as the correction target area with the first area that includes predetermined facial organs of the face image used as a reference, wherein the area setting unit sets the correction target area by enlarging the first area, which is used as the reference, with a predetermined enlargement ratio.
2. The image processing apparatus according to claim 1 , wherein the area setting unit enlarges the first area more toward a side opposite to the direction of the face as the degree of turn of the face is increased.
3. The image processing apparatus according to claim 2 ,
wherein the face direction estimating unit estimates the degree of turn of the face based on a distance between the facial organs, and
wherein the area setting unit determines the degree of enlargement for the first area based on the distance between the facial organs.
4. The image processing apparatus according to claim 1 ,
wherein the area setting unit acquires an area that includes the facial organs detected by a detection unit, which can detect an area including the facial organs from the target image, as the first area,
wherein, when the degree of turn of the face is larger than a predetermined value, the area setting unit changes the acquired first area based on the direction and the degree of turn of the face, and
wherein, when the degree of turn of the face is equal to or smaller than the predetermined value, the area setting unit sets the correction target area with the acquired first area used as a reference.
5. The image processing apparatus according to claim 4 , further comprising an image correcting unit that modifies an image within the correction target area by disposing a plurality of division points in the set correction target area, dividing the correction target area into a plurality of small areas by using straight lines connecting the division points, and modifying the small areas by moving the position of at least one of the division points.
6. A method for image processing using a computer comprising:
estimating the direction and the degree of turn of a face with the front direction of the face included in a face image used as a reference for a target image that includes the face image; and
changing a first area based on the direction and the degree of turn of the face and sets a correction target area with the changed first area used as a reference when an area that includes the first area is set as the correction target area with the first area that includes predetermined facial organs of the face image used as a reference, wherein the correction target area is set by enlarging the first area, which is used as the reference, with a predetermined enlargement ratio.
7. A computer program product for processing an image comprising:
a non-transitory computer readable program medium; and
a computer program stored on the non-transitory computer readable medium, the computer program including;
a program for causing a computer to estimate the direction and the degree of turn of a face with the front direction of the face included in a face image used as a reference for a target image that includes the face image; and
a program for causing a computer to change a first area based on the direction and the degree of turn of the face and sets a correction target area with the changed first area used as a reference when an area that includes the first area is set as the correction target area with the first area that includes predetermined facial organs of the face image used as a reference, wherein the correction target area is set by enlarging the first area, which is used as the reference, with a predetermined enlargement ratio.