公开(公告)号：US20240330632A1

公开(公告)日：2024-10-03

申请号：US18620860

申请日：2024-03-28

Applicant: CANON KABUSHIKI KAISHA

Inventor： NAOKO BABA ,  YUKI OMAGARI ,  SEIJI ABE ,  DAISUKE YOSHITOKU

IPC: G06K15/02

CPC classification number: G06K15/1878 ,  G06K15/027 ,  G06K2215/101

Abstract: In an image processing apparatus, in a case where an input recording mode is a first recording mode and a density characteristic value for a patch pattern in an input gradation value greater than or equal to a predetermined gradation is higher than the target density value associated with an input gradation value, in correction processing, a correction value for an input gradation value greater than or equal to the predetermined gradation is not 0, in a case where the input recording mode is a second recording mode and a density characteristic value for a patch pattern in an input gradation value greater than or equal to the predetermined gradation is higher than the target density value associated with an input gradation value, in the correction processing, a correction value for an input gradation value greater than or equal to the predetermined gradation is 0.

公开(公告)号：US20230347673A1

公开(公告)日：2023-11-02

申请号：US18300325

申请日：2023-04-13

Applicant: CANON KABUSHIKI KAISHA

Inventor： SEIJI ABE ,  MITSURU URATANI ,  KOUTA MURASAWA

IPC: B41M3/06

CPC classification number: B41M3/06

Abstract: An object of the present disclosure is to perform color calibration of a printing apparatus that performs printing with a fluorescent material regardless of unevenness of a fluorescent whitening agent contained in the sheet. An embodiment of the present invention is a control apparatus including: a control unit that controls printing of a patch on a printing medium, the patch being formed by printing a fluorescent material; and a correction unit that corrects a printing amount of the fluorescent material based on a measurement result obtained by receiving light reflected by the printing medium on which the patch is printed, in which the patch is printed using the fluorescent material and a non-fluorescent material, and at least one dot of the non-fluorescent material overlaps a dot of the fluorescent material.