Imaging device, endoscope system and imaging method using yellow-eliminated green data

1. An image generating device comprising:

a first image-information generating unit that generates first image information based on a plurality of pieces of acquired color element information;

a color-component detecting unit that detects a predetermined color component based on each piece of color element information;

a color-component eliminating unit that eliminates the predetermined color component detected by the color-component detecting unit from a predetermined piece of color element information among the plurality of pieces of color element information; and

a second image-information generating unit that generates second color information based on a piece of color element information obtained by eliminating the predetermined color component by the color-component eliminating unit and another piece of color element information, wherein

the plurality of pieces of color element information comprises red data, green data, and blue data,

the color-component detecting unit detects a yellow color component,

the color-component eliminating unit generates yellow-eliminated green data by eliminating the yellow component from the green data, and

the second image-information generating unit generates the second image information based on the yellow-eliminated green data and the blue data.

2. The image generating device according to claim 1 , wherein

the color-component detecting unit detects a long-wavelength component containing a yellow component or a red component longer than the yellow component, and

the color-component eliminating unit generates color data by eliminating the long wavelength component having the yellow component or the red component longer than the yellow component from the green data.

3. The image generating device according to claim 1 , wherein the second image-information generating unit generates the second image information by associating red data of the first image information with the yellow-eliminated green data, and associating each of green data and blue data of the first image information with the blue data.

4. The image generating devices according to claim 1 , wherein the second image-information generating unit generates the second image information based on each piece of contrast information for the yellow-eliminated green data and the blue data.

5. An endoscope system comprising:

a first image-information generating unit that generates first image information based on a plurality of pieces of acquired color element information;

a color-component detecting unit that detects a predetermined color component based on each piece of color element information;

a color-component eliminating unit that eliminates the predetermined color component detected by the color-component detecting unit from a predetermined piece of color element information among the plurality of pieces of color element information; and

a second image-information generating unit that generates second color information based on a piece of color element information obtained by eliminating the predetermined color component by the color-component eliminating unit and another piece of color element information, wherein

the plurality of pieces of color element information comprises red data, green data, and blue data,

the color-component detecting unit detects a yellow color component,

the color-component eliminating unit generates yellow-eliminated green data by eliminating the yellow component from the green data, and

the second image-information generating unit generates the second image information based on the yellow-eliminated green data and the blue data.

6. The endoscope system according to claim 5 , further comprising:

an endoscope device that captures an in-vivo image of a subject; and

a display device that displays the first image information and the second image information generated by the image generating device.

7. The endoscope system according to claim 6 , wherein the endoscope device is a capsule endoscope.

8. An image generating method comprising:

generating first image information based on acquired red data, green data, and blue data;

calculating hue of the first image information;

detecting a yellow component based on the hue calculated at the calculating;

eliminating the yellow component from the green data; and

generating second image information based on yellow-eliminated green data obtained by eliminating the yellow component from the green data at the eliminating and the blue data, wherein

the yellow component is detected at the detecting,

the yellow-eliminated green data is generated at the eliminating by eliminating the yellow color component from the green data, and

the second image information is generated at the generating the second image information based on the yellow-eliminated green data and the blue data.

9. An image generating device comprising:

a first image-information generating means that generates first image information based on a plurality of pieces of acquired color element information;

a color-component detecting means that detects a predetermined color component based on each piece of color element information;

a color-component eliminating means that eliminates the predetermined color component detected by the color-component detecting means from a predetermined piece of color element information among the plurality of pieces of color element information; and

a second image-information generating means that generates second color information based on a piece of color element information obtained by eliminating the predetermined color component by the color-component eliminating means and another piece of color element information, wherein

the plurality of pieces of color element information comprises red data, green data, and blue data,

the color-component detecting means detects a yellow color component,

the color-component eliminating means generates yellow-eliminated green data by eliminating the yellow component from the green data, and

the second image-information generating means generates the second image information based on the yellow-eliminated green data and the blue data.