Color material amount determination table forming method and color material amount measurement apparatus

A color material amount determination table forming method of forming a color material amount determination table in which a color value of a multi-colored image is associated with respective adhered amounts of plural color materials, the multi-colored image being formed by an image forming apparatus, the method comprising:

• a pattern image output step of forming a pattern image on a recording medium by changing a control parameter controlling the adhered amounts of the respective color materials used in the image forming apparatus so that the adhered amounts of the respective color materials are changed in the pattern image;
• a reflectance characteristics measurement step of measuring reflectance characteristics in a visible wavelength region and an infrared wavelength region of the pattern image;
• a color value calculation step of calculating the color value of the pattern image based on the reflectance characteristics in the visible wavelength region measured in the reflectance characteristics measurement step;
• a color material amount calculation step of calculating the adhered amounts of the respective color materials in the pattern image based on the reflectance characteristics in the infrared wavelength region measured in the reflectance characteristics measurement step;
• and
• a table forming step of forming the color material amount determination table in which the color value of the multi-colored image is associated with the respective adhered amounts of the color materials, the multi-colored image being formed by the image forming apparatus, the color material amount determination table being formed based on the color value calculated in the color value calculation step and the adhered amounts of the respective color materials calculated in the color material amount calculation step.