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公开(公告)号：US11770491B2
公开(公告)日：2023-09-26
申请号：US17735388
申请日：2022-05-03
发明人： Ryosuke Otani , Hisashi Ishikawa
CPC分类号： H04N1/4051 , G06K15/1877 , H04N1/4055
摘要： A quantized value for a pixel of interest in an input image is derived by using a predetermined threshold value matrix. Then, based on a pixel value group in a predetermined reference area including the pixel of interest in the input image and a threshold value group corresponding thereto, directionality of correction is determined. Further, based on the pixel value group and the threshold value group, whether or not the pixel of interest satisfies a predetermined condition for changing the quantized value is determined. Then, based on both the determination results, the quantized value is corrected.
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公开(公告)号：US11588956B2
公开(公告)日：2023-02-21
申请号：US17375570
申请日：2021-07-14
发明人： Shoei Moribe , Hisashi Ishikawa
摘要： An apparatus comprises a unit configured to generate gradation data corresponding to an achromatic color generated by combining two or more colors among a plurality of colors, for an excess amount of a total gradation value exceeding a predetermined value, the total gradation value being a sum of gradation values of the plurality of colors used for recording a pixel of interest, and generate gradation data corresponding to the plurality of colors, based on the generated gradation data corresponding to the achromatic color; and a unit configured to quantize the generated gradation data, and generate data to control recording of dots corresponding to the pixel of interest. The predetermined value is a gradation value indicating whether or not to record the dots in an overlapping manner, in case that the dots corresponding to the total gradation value are recorded.
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公开(公告)号：US11554591B2
公开(公告)日：2023-01-17
申请号：US17202777
申请日：2021-03-16
发明人： Naoya Takesue , Hisashi Ishikawa
IPC分类号： B41J29/393 , B41J2/21 , G06K15/00 , B41J2/045 , G06K15/10 , G06K15/02 , B41J2/165 , B41J2/205
摘要： 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：US20220222498A1
公开(公告)日：2022-07-14
申请号：US17708601
申请日：2022-03-30
发明人： Naoya Takesue , Hisashi Ishikawa , Akitoshi Yamada
摘要： 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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5.发明授权公开(公告)号：US11323590B2
公开(公告)日：2022-05-03
申请号：US15995602
申请日：2018-06-01
发明人： Ryosuke Otani , Hisashi Ishikawa
摘要： The image processing apparatus of the present invention includes: a generation unit configured to generate a sharpness recovery amount for recovering degradation of a spatial frequency response from a target image; and a line width correction unit configured to perform line width correction processing for the target image based on the sharpness recovery amount, and the line width correction unit corrects a line width in accordance with a sign of a pixel whose absolute value of the sharpness recovery amount is large in a case where signs of the sharpness recovery amounts reverse between adjacent pixels of the target image.
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公开(公告)号：US11321596B2
公开(公告)日：2022-05-03
申请号：US16704257
申请日：2019-12-05
发明人： Naoya Takesue , Hisashi Ishikawa , Akitoshi Yamada
摘要： 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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7.发明授权公开(公告)号：US11212415B2
公开(公告)日：2021-12-28
申请号：US16872588
申请日：2020-05-12
发明人： Tomokazu Yanai , Hisashi Ishikawa , Satoshi Wada , Takeshi Yazawa , Tetsuya Suwa , Hidetsugu Kagawa
摘要： Disclosed is an image processing apparatus including: a derivation unit configured to derive a target luminance characteristic based on a viewing condition of an image and a print luminance characteristic predicted based a reflection characteristic corresponding to data thereon; a unit configured to generate print image data on an image by converting input image data by using a tone conversion characteristic that is set based on these characteristics, in which the derivation unit derives, in a case where a reproduction range of an illumination intensity in the print luminance characteristic is different, the target luminance characteristic so that a liner area of an output luminance in a case where the reproduction range is relatively large becomes large.
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公开(公告)号：US20210303952A1
公开(公告)日：2021-09-30
申请号：US17211934
申请日：2021-03-25
发明人： Naoya Takesue , Hisashi Ishikawa
摘要： To enable highly accurate density unevenness correction while suppressing a reduction in productivity in printing accompanying correction value calculation for density unevenness correction. Based on an image obtained by scanning a chart including patches having uniform density for each tone value, a density characteristic of each nozzle is acquired. A non-ejectable nozzle that cannot eject ink normally is detected by analyzing a pattern for detecting the non-ejectable nozzle in the image obtained by scanning the chart. At the time of acquiring the density characteristic, the density characteristic is acquired based on a density measured value of an area of the image, which corresponds to a nozzle that is not detected as the non-ejectable nozzle.
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公开(公告)号：US11090946B2
公开(公告)日：2021-08-17
申请号：US16683567
申请日：2019-11-14
发明人： Ryosuke Otani , Hisashi Ishikawa
摘要： Density unevenness accompanying a variation in an ejection characteristic of each nozzle is reduced without worsening granularity of an image. To this end, an image processing apparatus generates first corrected data by correcting image data by using a first correction table common to the plurality of nozzles. Further, the image processing apparatus generates second corrected data by correcting the image data by using a second correction table for each of the plurality of nozzles. Furthermore, the image processing apparatus generates first quantized data by quantizing the first corrected data and generates second quantized data by quantizing the second corrected data. After that, the image processing apparatus generates N-valued print data based on the first quantized data and the second quantized data.
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10.发明申请公开(公告)号：US20200274985A1
公开(公告)日：2020-08-27
申请号：US16872588
申请日：2020-05-12
发明人： Tomokazu Yanai , Hisashi Ishikawa , Satoshi Wada , Takeshi Yazawa , Tetsuya Suwa , Hidetsugu Kagawa
摘要： Disclosed is an image processing apparatus including: a derivation unit configured to derive a target luminance characteristic based on a viewing condition of an image and a print luminance characteristic predicted based a reflection characteristic corresponding to data thereon; a unit configured to generate print image data on an image by converting input image data by using a tone conversion characteristic that is set based on these characteristics, in which the derivation unit derives, in a case where a reproduction range of an illumination intensity in the print luminance characteristic is different, the target luminance characteristic so that a liner area of an output luminance in a case where the reproduction range is relatively large becomes large.
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