| 摘要 |
<p>PROBLEM TO BE SOLVED: To perform calibration in which a measurement error of a color caused by a field angle of a reading optical system is reduced.SOLUTION: A reading apparatus 10 includes: reading optical systems 15R, 15G, 15B for converting light made incident from a reading surface S of a transfer medium 11 into an image signal; a color chart 100 formed on the transfer medium 11; and a control device 20 for performing calibration on the basis of an image signal obtained when reading the color chart 100. Each of the reading optical systems 15R, 15G, 15B is an optical system having a field angle. The color chart 100 has a plurality patch-like images having color scheme in which saturation is gradually reduced in a direction separated from optical axes of the reading optical systems 15R, 15G, 15B on the reading surface S. In the color chart 100, patch-like images of colors having comparatively high saturation e.g. are concentrically arranged in the vicinities of the optical axes and patch-like images of colors having comparatively low saturation are arranged on the other positions.</p> |
