Patent ID: 11915070
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H  B  C | IPC C  G

Claim 17:
18. An image processing method that is performed by an image processing apparatus, the image processing method comprising:
a step of controlling a printing apparatus to print a patch image for estimating a discharge amount of fluorescent ink on a printing medium using the fluorescent ink and subtractive mixed color ink;
a step of controlling a measuring apparatus to measure the patch image;
a step of estimating the discharge amount of the fluorescent ink based on a measurement value obtained by measuring the patch image; and
a step of correcting, based on the estimated discharge amount, a density output by the printing apparatus with respect to an input color value,
wherein the printing apparatus is controlled so that a dot of the fluorescent ink in the patch image is covered by at least one dot of the subtractive mixed color ink whose reflectance in an activation wavelength of the fluorescent ink is higher than reflectance in a light-emitting wavelength of the fluorescent ink.