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公开(公告)号：US20160352963A1
公开(公告)日：2016-12-01
申请号：US15157682
申请日：2016-05-18
Applicant: CANON KABUSHIKI KAISHA
Inventor： Hajime Nagai , Yoshinori Nakajima , Yumi Shimokodachi , Hiroyuki Sakai , Tomokazu Yanai , Naoya Takesue , Hiroshi Mori
CPC classification number: H04N1/3871 , G06T3/40 , H04N1/3935 , H04N2201/0094
Abstract: Based on the resolution of acquired image data and a target resolution, a first resolution higher than the resolution of the image data and closest to the resolution of the image data is decided out of divisors of the target resolution. The image data is converted into first image data having the first resolution. The first image data is processed using a filter configured to compensate for degradation in quality of an image represented by the image data, which can occur when the image data is processed. The first image data processed using the filter is converted into second image data having the target resolution.
Abstract translation: 基于所获取的图像数据的分辨率和目标分辨率，从目标分辨率的除数来确定比图像数据的分辨率高且最接近图像数据的分辨率的第一分辨率。 图像数据被转换成具有第一分辨率的第一图像数据。 使用被配置为补偿由图像数据表示的图像的质量劣化的滤波器来处理第一图像数据，该图像数据在处理图像数据时可能发生。 使用滤波器处理的第一图像数据被转换成具有目标分辨率的第二图像数据。
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公开(公告)号：US12043039B2
公开(公告)日：2024-07-23
申请号：US17518864
申请日：2021-11-04
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yuki Nakatani , Hisashi Ishikawa , Naoya Takesue
IPC: B41J29/393 , B41J2/045 , B41J2/21
CPC classification number: B41J2/2146 , B41J2/04535 , B41J2/04541 , B41J2/04558
Abstract: An image processing apparatus includes a generation unit generating a first chart image having a plurality of patches with different tone values, an obtaining unit obtaining measurement values acquired by measuring a test chart created by forming the first chart image on a medium, the measurement values indicating densities of a color material in regions of the test chart corresponding to the respective patches, and a selection unit selecting at least one tone value in a range in which an output characteristic of the image forming apparatus derived based on the tone values of the respective patches and the measurement values satisfies a predetermined condition. The generation unit generates a second chart image having a patch corresponding to the selected tone value included and at least one patch corresponding to the tone value outside the range in which the output characteristic satisfies the predetermined condition is omitted among the patches.
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公开(公告)号：US11778125B2
公开(公告)日：2023-10-03
申请号：US17944696
申请日：2022-09-14
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kyohei Kikuta , Naoya Takesue
IPC: H04N1/60
CPC classification number: H04N1/605 , H04N1/6008 , H04N1/6027 , H04N1/6036
Abstract: An image processing apparatus comprises a generation unit configured to generate correction information for reducing density change in image formation using a printing material including a plurality of colors. The generation unit generates correction information, sequentially in ascending order from a region of a smaller number of printing materials in a read-out image acquired by reading an image formed using a printing material including a plurality of colors, the correction information corresponding to a printing material for which correction information has not been generated among the printing materials used for the region.
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24.发明公开公开(公告)号：US20230166527A1
公开(公告)日：2023-06-01
申请号：US18101832
申请日：2023-01-26
Applicant: CANON KABUSHIKI KAISHA
Inventor： Naoya Takesue , Hisashi Ishikawa
CPC classification number: B41J2/2146 , B41J2/04586
Abstract: This invention provides an image processing apparatus for generating image data for recording in a recording apparatus including a recording unit including a plurality of nozzles discharging ink, comprising a converting unit which converts, based on characteristic information according to a characteristic of each nozzle included in the recording unit, image data corresponding to an input print job into image data to be used for recording by the recording unit; and a control unit which executes one of a plurality of correction processes based on image data obtained by reading an image recorded by the recording unit, wherein the plurality of correction processes include first correction processing that is performed after the recording of the image according to the print job is stopped, and second correction processing that is performed without stopping the recording of the image according to the print job.
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公开(公告)号：US20230110982A1
公开(公告)日：2023-04-13
申请号：US18065067
申请日：2022-12-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Naoya Takesue , Hisashi Ishikawa
Abstract: An object is to enable highly accurate density unevenness correction while suppressing a reduction in productivity of printing accompanying correction value calculation for density unevenness correction. In the image processing apparatus, density correction information that specifies an output tone value for implementing a target density for an input tone value for each nozzle and which does not include the influence by a non-ejectable nozzle that cannot eject ink normally is acquired. In a case where a non-ejectable nozzle is detected during printing processing, output tone values corresponding to the detected non-ejectable nozzle and peripheral nozzles thereof among output tone values specified in the density correction information are changed.
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Patent Agency Ranking
26.发明申请公开(公告)号：US20230082464A1
公开(公告)日：2023-03-16
申请号：US17944696
申请日：2022-09-14
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kyohei Kikuta , Naoya Takesue
Abstract: An image processing apparatus comprises a generation unit configured to generate correction information for reducing density change in image formation using a printing material including a plurality of colors. The generation unit generates correction information, sequentially in ascending order from a region of a smaller number of printing materials in a read-out image acquired by reading an image formed using a printing material including a plurality of colors, the correction information corresponding to a printing material for which correction information has not been generated among the printing materials used for the region.
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公开(公告)号：US20210303950A1
公开(公告)日：2021-09-30
申请号：US17202777
申请日：2021-03-16
Applicant: CANON KABUSHIKI KAISHA
Inventor： Naoya Takesue , Hisashi Ishikawa
Abstract: An object is to enable highly accurate density unevenness correction while suppressing a reduction in productivity of printing accompanying correction value calculation for density unevenness correction. In the image processing apparatus, density correction information that specifies an output tone value for implementing a target density for an input tone value for each nozzle and which does not include the influence by a non-ejectable nozzle that cannot eject ink normally is acquired. In a case where a non-ejectable nozzle is detected during printing processing, output tone values corresponding to the detected non-ejectable nozzle and peripheral nozzles thereof among output tone values specified in the density correction information are changed.
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公开(公告)号：US10321017B2
公开(公告)日：2019-06-11
申请号：US15576631
申请日：2016-05-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Naoya Takesue , Hisashi Ishikawa , Tomokazu Yanai , Hiroyuki Sakai , Yoshinori Nakajima , Hajime Nagai , Yumi Shimokodachi
Abstract: An image processing apparatus according to the present invention includes an acquisition unit configured to acquire an output condition when an image forming apparatus forms an image on a recording medium based on image data, and a processing unit configured to perform image processing on the image data for improving sharpness of the image by using a parameter based on the output condition. The parameter to be referred to by the processing unit represents such a characteristic that the image formed by the image forming apparatus has a luminous characteristic in relation to spatial frequency that remains constant or decreases continuously without causing any inflection point or any discontinuous point in a frequency band from a predetermined frequency to a limit frequency of the image forming apparatus.
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公开(公告)号：US20180160012A1
公开(公告)日：2018-06-07
申请号：US15576631
申请日：2016-05-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Naoya Takesue , Hisashi Ishikawa , Tomokazu Yanai , Hiroyuki Sakai , Yoshinori Nakajima , Hajime Nagai , Yumi Shimokodachi
CPC classification number: H04N1/4092 , G06T5/003 , G06T5/10 , G06T5/20 , G06T2207/20056 , H04N1/52
Abstract: An image processing apparatus according to the present invention includes an acquisition unit configured to acquire an output condition when an image forming apparatus forms an image on a recording medium based on image data, and a processing unit configured to perform image processing on the image data for improving sharpness of the image by using a parameter based on the output condition. The parameter to be referred to by the processing unit represents such a characteristic that the image formed by the image forming apparatus has a luminous characteristic in relation to spatial frequency that remains constant or decreases continuously without causing any inflection point or any discontinuous point in a frequency band from a predetermined frequency to a limit frequency of the image forming apparatus.
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公开(公告)号：US11610087B2
公开(公告)日：2023-03-21
申请号：US17708601
申请日：2022-03-30
Applicant: CANON KABUSHIKI KAISHA
Inventor： Naoya Takesue , Hisashi Ishikawa , Akitoshi Yamada
Abstract: Provided is quantization processing that can reduce color development defect due to dot overlapping and can output an image with reduced granularity when the image is printed by using multiple kinds of colorants. To this end, dot arrangement information for a colorant for which dot arrangement is already determined among multiple kinds of colorants is acquired for a predetermined region of the image, and an evaluation value of each pixel included in the predetermined region is derived based on the arrangement information. In addition, for the predetermined region, a target value for a predetermined colorant for which dot arrangement is yet to be determined is derived based on the image. Then, whether or not to arrange a dot of the predetermined colorant in the predetermined region is determined based on the target value and the evaluation value.
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