公开(公告)号：US10771657B2

公开(公告)日：2020-09-08

申请号：US16519680

申请日：2019-07-23

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tsukasa Doi ,  Hirokazu Tanaka ,  Hisashi Ishikawa ,  Shoei Moribe ,  Yusuke Yamamoto ,  Shigeo Kodama ,  Yuta Ikeshima

IPC: G06K15/00 ,  H04N1/60 ,  G06K15/02

Abstract: An image processing apparatus performs image processing to print a color materials of a first color and a second color. When a sum of a first gradation data for the first color and a second gradation data for the second color is equal to or smaller than the maximum value of thresholds of a first threshold matrix, a generation unit generates a second quantization data for the second color based on a result of comparing the second gradation data with a second threshold. When the sum is greater than the maximum value, the generation unit generates third gradation data by subtracting the maximum value from the sum and generates the second quantization data based on a result of comparing the third gradation data with the first threshold or a result of comparing a difference between the second gradation data and the third gradation data with the second threshold.

公开(公告)号：US20190007580A1

公开(公告)日：2019-01-03

申请号：US16019879

申请日：2018-06-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shoei Moribe ,  Yusuke Yamamoto

IPC: H04N1/405 ,  B41J2/21 ,  H04N1/60

CPC classification number: H04N1/405 ,  B41J2/2146 ,  H04N1/4092 ,  H04N1/605

Abstract: To implement sharpness recovery processing suitable for an image, an image processing apparatus for generating, based on an input image, a halftone image to be provided to an image forming unit which forms an image on a printing medium, comprises: a recovery processing unit configured to perform, on the input image, recovery processing for compensating for sharpness degradation in an image formed by the image forming unit; a generating unit configured to generate a recovery amount of each pixel by using the input image having undergone the recovery processing; and a halftone processing unit configured to generate, based on the recovery amount, the halftone image by performing halftone processing on the input image having undergone the recovery processing.

公开(公告)号：US20180324327A1

公开(公告)日：2018-11-08

申请号：US15968183

申请日：2018-05-01

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shoei Moribe ,  Takashi Ochiai

IPC: H04N1/60

CPC classification number: H04N1/6019 ,  G09G5/06 ,  H04N1/407 ,  H04N1/58 ,  H04N1/60 ,  H04N1/6013 ,  H04N1/6027 ,  H04N1/6033

Abstract: A color conversion look-up table generating device of the present invention includes a converting unit configured to convert an actual color material value of a target grid point in the color conversion look-up table and an actual color material value of a neighbor grid point of the target grid point into virtual color material values, and a correcting unit that corrects the actual color material value of the target grid point on the basis of a virtual color material amount of the target grid point and a virtual color material amount of the neighbor grid point, wherein the virtual color material value is an output value of a virtual color material that absorbs only light of spectral reflectance in each of divided blocks in a case in which spectral reflectance of the actual color material is divided into n (n is an integer of 3 or more) blocks.

公开(公告)号：US09894250B2

公开(公告)日：2018-02-13

申请号：US15239252

申请日：2016-08-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shoei Moribe

IPC: H04N1/60 ,  H04N1/50 ,  H04N1/52

CPC classification number: H04N1/6066 ,  H04N1/502 ,  H04N1/52 ,  H04N1/6019 ,  H04N2201/0082

Abstract: A unit acquires first image data expressing a color of an image and second image data expressing a feature of the image. A unit color-separates the first image data into first and second color material amount data. A unit generates inverted data by inverting the second image data. A unit generates first corrected data from the first color material amount data and the inverted data and generates second corrected data from the second color material amount data and the second image data. A unit generates, based on the first corrected data, first data indicating on dot printing positions during a printing and scanning operation, generates, based on the second corrected data, second data indicating on dot printing positions in the operation, and generates, based on the first and second data, image forming data.

公开(公告)号：US12212719B2

公开(公告)日：2025-01-28

申请号：US18224831

申请日：2023-07-21

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shoei Moribe

IPC: H04N1/00 ,  G06T7/00

Abstract: By an image forming apparatus comprising a reading unit configured to read a sheet on which a chart image is printed, the chart image including a first print pattern using a first color ink and a second print pattern using a second color ink whose color is different from the first color, containing at least part of the first print pattern, and having a predetermined density and a detection unit configured to detect deformation of the sheet in an area of the sheet based on a difference between a moisture amount in a portion corresponding to an area in which the chart image in the read image obtained by the reading unit is printed and a moisture amount in a portion corresponding to a non-printing area, determination of cockling is performed with a high accuracy.

公开(公告)号：US11825245B2

公开(公告)日：2023-11-21

申请号：US17026899

申请日：2020-09-21

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shoei Moribe

IPC: G09G3/00 ,  G09G5/377 ,  H04N9/31 ,  G03B21/134 ,  H04N1/00 ,  H04N1/60

CPC classification number: H04N9/3182 ,  G03B21/134 ,  G09G3/002 ,  G09G5/377 ,  H04N1/00835 ,  H04N1/6086 ,  G09G2360/144

Abstract: The present invention provides an image processing device that reproduces the color of an input image more faithfully under different environment illumination without the need to prepare a different signal separation LUT for different environment illumination. An image processing device in one embodiment of the present invention generates data for generating an overlap image by overlapping an image formed by an image forming device and an image projected by an image projection device. The image processing device includes a generation unit configured to, based on input image data, generate first image data for the image forming device and second image data for the image projection device, a first acquisition unit configured to acquire environment illumination information relating to environment illumination in generating the overlap image, and a correction unit configured to correct the second image data based on the environment illumination information.

公开(公告)号：US11760107B2

公开(公告)日：2023-09-19

申请号：US17031078

申请日：2020-09-24

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shoei Moribe

IPC: B41J2/21

CPC classification number: B41J2/2135 ,  B41J2/2139 ,  B41J2/2146

Abstract: An image processing apparatus obtains a plurality of measured values obtained by measuring a measurement image; and replaces a first measured value with a value based on a second measured value. The first measured value being included in the plurality of measured values and being unsuitable for identifying the density characteristic, and the second measured value being included in the plurality of measured values and being suitable for identifying the density characteristic.

公开(公告)号：US11679599B2

公开(公告)日：2023-06-20

申请号：US17527358

申请日：2021-11-16

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shoei Moribe

IPC: B41J2/21 ,  H04N1/04 ,  H04N1/00

CPC classification number: B41J2/2146 ,  H04N1/00037 ,  H04N1/00082 ,  H04N1/0408

Abstract: An image processing apparatus operable to generate data for printing an image onto a printing medium using a plurality of color materials. The apparatus generates a plurality of color image data corresponding to the plurality of color materials based on image data; generates multinary color data corresponding to a combination of the plurality of color materials based on the plurality of color image data; and generates quantized data corresponding to each of the plurality of color materials based on the multinary color data and a threshold matrix. The apparatus generates the quantized data such that a color difference between a generated color in a case where a shift in a relative printing position does not occur and a generated color in a case where a shift in a relative printing position occurs is small.

公开(公告)号：US20210103784A1

公开(公告)日：2021-04-08

申请号：US17031150

申请日：2020-09-24

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shoei Moribe

IPC: G06K15/02 ,  G06K15/10

Abstract: An image processing apparatus corrects a measured value obtained by measuring a measurement image formed using a printing element configured to discharge ink, the measured value being used to identify a density characteristic of the printing element. The image processing apparatus obtains a measured value; and corrects the measured value based on a density of the measurement image.

公开(公告)号：US20200324557A1

公开(公告)日：2020-10-15

申请号：US16843412

申请日：2020-04-08

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shoei Moribe ,  Yumi Yanai

IPC: B41J2/21 ,  H04N1/52

Abstract: First to third inks have a relationship where dot power of an overlapping dot formed by overlapping dots of first and third inks is higher than dot power of an overlapping dot formed by overlapping dots of second and third inks. A first gradation value for the first ink is quantized to generate a first quantized value, a second gradation value for the second ink is quantized to generate a second quantized value, and a third gradation value for the third ink is quantized to generate a third quantized value. In this case, the quantization processing is performed such that, among pixels for which the third quantized values indicate printing in a predetermined pixel region, the number of pixels for which the second quantized values indicate printing is greater than the number of pixels for which the first quantized values indicate printing.