Method and image processor for processing image data to adjust for brightness in face, and method and apparatus for printing with adjusted image data

1. A printing method, comprising:

receiving image data obtained by capturing an image including a human;

analyzing the image data and extracting a part of the image including a human face;

detecting a prescribed part of the extracted human face;

adjusting brightness of the image data with reference to the prescribed part to obtain adjusted image data; and

printing an image based on the adjusted image data,

wherein the prescribed part includes a nasalis muscle and a side of the nasalis muscle, and the detecting of the prescribed part includes:

detecting positions of left and right eyes in the extracted human face;

defining a center point between the positions of the left and right eyes as a base of a nose;

defining a point positioned downward from the center point and where the brightness is rapidly decreased, as a tip of the nose; and

detecting the nasalis muscle by connecting the base of the nose and the tip of the nose,

wherein the image data is so adjusted that the brightness of a part of the nasalis muscle is increased,

wherein the part of the nasalis muscle to be adjusted, has a first length shorter than a length between the base of the nose and the tip of the nose, excepts both ends of the nasalis muscle, and has a first width set at a proportion with respect to the length,

wherein the image data is so adjusted that the brightness of a part of the side of the nasalis muscle is decreased, and

wherein the part of the side of the nasalis muscle to be adjusted has a second length which is half of the first length and a second width which is 1.5 times the first width.

2. The printing method as set forth in claim 1 , wherein:

the prescribed part includes at least one nostril; and

the image data is so adjusted that the brightness of an area aside the nasalis muscle and above the at least one nostril is decreased.

3. The printing method as set forth in claim 1 , wherein:

the prescribed part includes at least one cheek; and

the image data is so adjusted that the brightness of the at least one cheek is decreased.

4. The printing method as set forth in claim 1 , further comprising:

detecting whether the image data is associated with information indicative whether the image is captured with flashlight; and

printing the image data without the adjusting in a case where the information indicates that the image is captured without flashlight.

5. The printing method as set forth in claim 1 , wherein:

the prescribed part includes at least one nostril and at least one cheek;

the detecting of the prescribed part includes:

detecting first points corresponding to both corners of a mouth in the extracted human face;

detecting second points at which a virtual line horizontally extending from the first points crosses a contour of the extracted human face;

detecting a center point between one of the first points and the one of the second points on the virtual line; and

defining a portion included in a circle which a center thereof is one of the second points and a radius thereof is a length from one of the second points to one of the first points, as the at least one cheek;

the image data is so adjusted that the brightness of an area aside the nasalis muscle and above the at least one nostril is decreased; and

the image data is so adjusted that the brightness of the at least one cheek is decreased.

6. A printing apparatus, comprising:

a receiver, operable to receive image data obtained by capturing an image including a human;

an analyzer, operable to analyze the image data and to extract a part of the image including a human face;

a detector, operable to detect a prescribed part of the extracted human face;

an adjuster, operable to adjust brightness of the image data with reference to the prescribed part to obtain adjusted image data; and

a printing section, operable to print an image based on the adjusted image data,

wherein the prescribed part includes a nasalis muscle and a side of the nasalis muscle, and the detector is operable to:

detect positions of left and right eyes in the extracted human face;

define a center point between the positions of the left and right eyes as a base of a nose;

define a point positioned downward from the center point and where the brightness is rapidly decreased, as a tip of the nose; and

detect the nasalis muscle by connecting the base of the nose and the tip of the nose,

wherein the adjuster adjusts the image data so that the brightness of a part of the nasalis muscle is increased,

wherein the part of the nasalis muscle to be adjusted, has a first length shorter than a length between the base of the nose and the tip of the nose, excepts both ends of the nasalis muscle, and has a first width set at a proportion with respect to the length,

wherein the adjuster adjusts the image data so that the brightness of a part of the side of the nasalis muscle is decreased, and

wherein the part of the side of the nasalis muscle to be adjusted has a second length which is half of the first length and a second width which is 1.5 times the first width.

7. An image processing method, comprising:

receiving image data obtained by capturing an image including a human;

analyzing the image data and extracting a part of the image including a human face;

detecting a prescribed part of the extracted human face;

adjusting brightness of the image data with reference to the prescribed part to obtain adjusted image data; and

generating control data adapted to be used in a printing apparatus, based on the adjusted image data,

wherein the prescribed part includes a nasalis muscle and a side of the nasalis muscle, and the detecting of the prescribed part includes:

detecting positions of left and right eyes in the extracted human face;

defining a center point between the positions of the left and right eyes as a base of a nose;

defining a point positioned downward from the center point and where the brightness is rapidly decreased, as a tip of the nose; and

detecting the nasalis muscle by connecting the base of the nose and the tip of the nose,

wherein the image data is so adjusted that the brightness of a part of the nasalis muscle is increased,

wherein the part of the nasalis muscle to be adjusted, has a first length shorter than a length between the base of the nose and the tip of the nose, excepts both ends of the nasalis muscle, and has a first width set at a proportion with respect to the length,

wherein the image data is so adjusted that the brightness of a part of the side of the nasalis muscle is decreased, and

wherein the part of the side of the nasalis muscle to be adjusted has a second length which is half of the first length and a second width which is 1.5 times the first width.

8. An image processor, comprising:

a receiver, operable to receive image data obtained by capturing an image including a human;

an analyzer, operable to analyze the image data and to extract a part of the image including a human face;

a detector, operable to detect a prescribed part of the extracted human face;

an adjuster, operable to adjust brightness of the image data with reference to the prescribed part to obtain adjusted image data; and

a generator, operable to generate control data adapted to be used in a printing apparatus, based on the adjusted image data,

wherein the prescribed part includes a nasalis muscle and a side of the nasalis muscle, and the detector is operable to:

detect positions of left and right eyes in the extracted human face;

define a center point between the positions of the left and right eyes as a base of a nose;

define a point positioned downward from the center point and where the brightness is rapidly decreased, as a tip of the nose; and

detect the nasalis muscle by connecting the base of the nose and the tip of the nose,

wherein the adjuster adjusts the image data so that the brightness of a part of the nasalis muscle is increased,

wherein the part of the nasalis muscle to be adjusted, has a first length shorter than a length between the base of the nose and the tip of the nose, excepts both ends of the nasalis muscle, and has a first width set at a proportion with respect to the length,

wherein the adjuster adjusts the image data so that the brightness of a part of the side of the nasalis muscle is decreased, and

wherein the part of the side of the nasalis muscle to be adjusted has a second length which is half of the first length and a second width which is 1.5 times the first width.