Image reading apparatus, image forming apparatus, image information correction method and computer readable medium

An image forming apparatus comprising:

• an image reading function unit that reads an image from an irradiated object and that generates image information;
• and
• an image forming function unit that forms an image on the basis of the image information generated by the image reading function unit, wherein
• the image reading function unit includes:
• a light source that generates light by synthesizing light from different illuminants, and irradiates the irradiated object with the generated light;
• a reading unit that reads light irradiated by the light source and reflected by the irradiated object, and that generates image information on the irradiated object;
• a correction amount setting unit that acquires from the reading unit the image information generated by using, as the irradiated object, a color sample formed in a color of light emitted by any one of the illuminants that generate the light of the light source, and that sets, according to the acquired image information, a correction amount to correct the image information on the irradiated object generated by the reading unit;
• and
• a correction unit that corrects the image information on the irradiated object generated by the reading unit, by using the correction amount set by the correction amount setting unit,
• wherein the correction amount setting unit sets the correction amount to correct the image information on the irradiated object, in response to determining that color coordinates of the image information on the color sample are located outside of a predetermined color region in a color space including the color coordinates.

An image information correction method comprising:

• acquiring image information that is generated on the basis of reflected light by an irradiated object irradiated with light by a light source generating the light by synthesizing light from different illuminants;
• acquiring the image information generated by using, as the irradiated object, a color sample formed in a color of light emitted by any one of the illuminants generating the light of the light source;
• setting, according to the image information on the color sample thus acquired, a correction amount to correct the image information on the irradiated object;
• and
• correcting the image information on the irradiated object by using the correction amount,
• wherein the setting the correction amount to correct the image information on the irradiated object occurs in response to determining that color coordinates of the image information on the color sample are located outside of a predetermined color region in a color space including the color coordinates.

A non-transitory computer readable medium storing a program that causes a computer to execute a process for image information correction, the process comprising:

• acquiring image information that is generated on the basis of reflected light by an irradiated object irradiated with light by a light source generating the light by synthesizing light from different illuminants;
• acquiring the image information generated by using, as the irradiated object, a color sample formed in a color of light emitted by any one of the illuminants generating the light of the light source;
• setting, according to the image information on the color sample thus acquired, a correction amount to correct the image information on the irradiated object;
• and
• correcting the image information on the irradiated object by using the correction amount,
• wherein the setting the correction amount to correct the image information on the irradiated object occurs in response to determining that color coordinates of the image information on the color sample are located outside of a predetermined color region in a color space including the color coordinates.