Color measuring device, image forming apparatus, colorimetric system and color measuring method

A colorimetric system comprising:

• an image capturing unit configured to capture an image of a subject whose color is to be measured;
• and
• a calculating unit configured to calculate a colorimetric value of the subject, wherein
• the image capturing unit includes
• a housing,
• a sensor unit configured to capture an image of a region, the sensor unit being held to the housing,
• an illumination light source configured to illuminate the region, the illumination light source being held to the housing,
• a detecting unit configured to detect a distance between predetermined two points from image data of the region obtained by the sensor unit, and
• a correcting unit configured to correct the image data including a subject whose color is to be measured according to a ratio of the detected distance to a reference distance, and
• the calculating unit calculates the colorimetric value of the subject based on the image data that has been corrected by the correcting unit.

A color measuring method executed in a color measuring device that includes a housing, a sensor unit configured to capture an image of a region, the sensor unit being held to the housing, and an illumination light source configured to illuminate the region, the illumination light source being held to the housing, the color measuring method comprising:

• detecting a distance between predetermined two points from image data of the region obtained by the sensor unit;
• correcting the image data including a subject whose color is to be measured according to a ratio of the detected distance to a reference distance;
• and
• calculating a colorimetric value of the subject based on the corrected image data.