| 摘要 |
PROBLEM TO BE SOLVED: To provide a colorimetric device capable of obtaining stable image data from a subject of colorimetry to perform accurate colorimetry, an image forming apparatus, a colorimetric system, and a colorimetric method.SOLUTION: A colorimetric camera 20 includes: a sensor unit (two-dimensional image sensor 27) that photographs a predetermined imaging object area including a subject area; a light path length changing member that is arranged between the sensor unit and the subject area, and transmits light; an illumination light source 30 that illuminates the imaging object area, and causes regular reflection light to enter the sensor unit, the reflection light having transmitted through the light path length changing member, having been regularly reflected in the subject area, and having further transmitted through the light path length changing member; and a distance calculation unit 46 that calculates a distance from the sensor unit to the subject area on the basis of an image of the regular reflection light (white streaks) included in a photographed image that is output from the sensor unit (two-dimensional image sensor 27). |
