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1. 发明申请

US20200042840A1 IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD 审中-公开
公开(公告)号：US20200042840A1
公开(公告)日：2020-02-06
申请号：US16519731
申请日：2019-07-23
申请人： CANON KABUSHIKI KAISHA
发明人： Tsukasa Doi , Hirokazu Tanaka , Hisashi Ishikawa , Shoei Moribe , Yusuke Yamamoto , Shigeo Kodama , Yuta Ikeshima
IPC分类号： G06K15/02 , G06K15/10
摘要： When a sum of a first gradation data for a first color and a second gradation data for a second color is greater than the maximum value of thresholds of a first threshold matrix, a generation unit generates a first overlapping gradation data and second overlapping gradation data by dividing a value obtained by subtracting the maximum value from the sum. Further, the generation unit generates a first quantization data based on a result of comparing the first overlapping gradation data with the second threshold or a result of comparing a difference between the first gradation data and the first overlapping gradation data with the first threshold, and generates a second quantization data based on a result of comparing the second overlapping gradation data with the first threshold or a result of comparing a difference between the second gradation data and the second overlapping gradation data with the second threshold.

2. 发明授权

US10057459B2 Image forming apparatus, updating method of gamma correction information, and storage medium 有权
公开(公告)号：US10057459B2
公开(公告)日：2018-08-21
申请号：US15291245
申请日：2016-10-12
申请人： CANON KABUSHIKI KAISHA
发明人： Yusuke Yamamoto , Hisashi Ishikawa , Hikaru Uchidate
IPC分类号： H04N1/60 , H04N1/40 , H04N1/407 , H04N1/405
CPC分类号： H04N1/4078 , H04N1/4056 , H04N1/6008 , H04N1/6036 , H04N1/6091
摘要： An image forming apparatus is provided, which is capable of implementing updating of gamma correction information with a high accuracy while avoiding a wasteful output of a patch image even in the case where environmental fluctuations occur. The image forming apparatus corrects a density tone level of image data by using gamma correction information, forms an image based on the corrected image data, and includes an updating unit configured to update the gamma correction information by using a patch image, and the updating unit updates the gamma correction information by using a patch image the output stability of which is high as first updating and further updates the gamma correction information updated by the first updating by using a patch image the sensitivity of which is high as second updating.

3. 发明申请

US20140355010A1 IMAGE PROCESSING APPARATUS AND METHOD THEREOF 有权
标题翻译：图像处理装置及其方法
公开(公告)号：US20140355010A1
公开(公告)日：2014-12-04
申请号：US14287323
申请日：2014-05-27
申请人： CANON KABUSHIKI KAISHA
发明人： Yuji Hara , Hisashi Ishikawa , Yusuke Yamamoto , Kenta Hosaki
IPC分类号： G06K15/02
CPC分类号： G06K15/1881 , H04N1/40081 , H04N1/407 , H04N1/52
摘要： Multi-value image data is sampled for each predetermined pixel range to generate tone information of the pixel range. The generated tone information is stored in a storage unit. Attribute information representing the attribute of a pixel is generated from the multi-value image data, and the generated attribute information is stored in the storage unit. Halftone processing is performed on the multi-value image data based on the tone information and attribute information stored in the storage unit.
摘要翻译：针对每个预定像素范围采样多值图像数据，以产生像素范围的色调信息。生成的音调信息存储在存储单元中。从多值图像数据生成表示像素的属性的属性信息，生成的属性信息存储在存储部中。基于存储在存储单元中的色调信息和属性信息对多值图像数据执行半色调处理。

4. 发明授权

US10043118B2 Image processing apparatus, image processing method, printing medium and storage medium 有权
公开(公告)号：US10043118B2
公开(公告)日：2018-08-07
申请号：US14750128
申请日：2015-06-25
申请人： CANON KABUSHIKI KAISHA
发明人： Naoki Sumi , Akitoshi Yamada , Shinichi Miyazaki , Masao Kato , Hisashi Ishikawa , Akihiro Fujimoto , Yusuke Yamamoto , Yuji Hara
IPC分类号： H04N1/60 , H04N1/46 , H04N1/56 , G06K15/02 , H04N1/405 , H04N1/58
摘要： An image processing apparatus that generates a halftone image by quantizing an input image includes: a holding unit configured to hold a threshold value matrix in which different threshold values are arranged; a pixel position determination unit configured to determine a candidate of a pixel position whose threshold value is to be rewritten based on each pixel value of a plurality of pixels included in a predetermined area for the predetermined area in the input image; and a threshold value determination unit configured to determine a threshold value of the pixel position determined to be the candidate by using at least one threshold value of a plurality of threshold values corresponding to the predetermined area.

5. 发明申请

US20170111548A1 IMAGE FORMING APPARATUS, UPDATING METHOD OF GAMMA CORRECTION INFORMATION, AND STORAGE MEDIUM 审中-公开
公开(公告)号：US20170111548A1
公开(公告)日：2017-04-20
申请号：US15291245
申请日：2016-10-12
申请人： CANON KABUSHIKI KAISHA
发明人： Yusuke Yamamoto , Hisashi Ishikawa , Hikaru Uchidate
IPC分类号： H04N1/407 , H04N1/405 , H04N1/60
CPC分类号： H04N1/4078 , H04N1/4056 , H04N1/6008 , H04N1/6036 , H04N1/6091
摘要： An image forming apparatus is provided, which is capable of implementing updating of gamma correction information with a high accuracy while avoiding a wasteful output of a patch image even in the case where environmental fluctuations occur. The image forming apparatus corrects a density tone level of image data by using gamma correction information, forms an image based on the corrected image data, and includes an updating unit configured to update the gamma correction information by using a patch image, and the updating unit updates the gamma correction information by using a patch image the output stability of which is high as first updating and further updates the gamma correction information updated by the first updating by using a patch image the sensitivity of which is high as second updating.

6. 发明授权

US09760815B2 Image processing apparatus and an image processing method for performing a correction process of a tone value of a pixel for smoothing a jaggy 有权
公开(公告)号：US09760815B2
公开(公告)日：2017-09-12
申请号：US14598672
申请日：2015-01-16
申请人： CANON KABUSHIKI KAISHA
发明人： Tsutomu Takada , Hiroki Kitamura , Yoshiyuki Akiba , Shuichi Nakamura , Yusuke Yamamoto , Masanao Motoyama , Takeshi Akiyama , Kenzo Tojima , Takaaki Nagaoka
IPC分类号： G06K15/02 , H04N1/50 , H04N1/52 , H04N1/58 , H04N1/409 , G06K15/14 , H04N1/29 , H04N1/40 , H04N1/60
CPC分类号： G06K15/1878 , G06K15/14 , G06K15/188 , G06K15/1881 , H04N1/29 , H04N1/40062 , H04N1/4092 , H04N1/506 , H04N1/52 , H04N1/58 , H04N1/60 , H04N1/6027 , H04N1/6072
摘要： With this invention, color shifting correction is performed first based on shifting amount information indicating a shifting amount with respect to the scanning direction on an image carrier of each image forming unit, and halftone processing is then performed, thus suppressing generation of moiré due to the color shifting correction, and forming a high-quality image. To this end, an image forming engine has color shifting amount storage units C, M, Y, and K (black) which store actual shifting amounts with respect to ideal scan directions on image carriers C, M, Y, and K in image forming units C, M, Y, and K. Color shifting correction amount arithmetic units C, M, Y, and K calculate color shifting correction amounts for respective color components on the basis of the stored color shifting amounts. Color shifting correction units C, M, Y, and K perform color shifting correction by converting coordinates upon reading out image data from bitmap memories C, M, Y, and K on the basis of the calculated color shifting correction amounts, and then perform tone correction. Data after tone correction undergo halftone processing by halftone processors. C, M, Y, and K. PWM processors C, M, Y, and K generate PWM signals for scanning, and output them to exposure units C, M, Y, and K of the respective image forming units.

7. 发明授权

US08964253B2 Image processing using derived correction amount 有权
标题翻译：使用衍生校正量的图像处理
公开(公告)号：US08964253B2
公开(公告)日：2015-02-24
申请号：US14049214
申请日：2013-10-09
申请人： Canon Kabushiki Kaisha
发明人： Tsutomu Takada , Hiroki Kitamura , Yoshiyuki Akiba , Shuichi Nakamura , Yusuke Yamamoto , Masanao Motoyama , Takeshi Akiyama , Kenzo Tojima , Takaaki Nagaoka
IPC分类号： H04N1/40 , H04N1/60 , H04N1/50 , H04N1/58 , G03G15/00
CPC分类号： G06K15/1878 , G06K15/14 , G06K15/188 , G06K15/1881 , H04N1/29 , H04N1/40062 , H04N1/4092 , H04N1/506 , H04N1/52 , H04N1/58 , H04N1/60 , H04N1/6027 , H04N1/6072
摘要： Color shifting correction is performed first based on shifting amount information indicating a shifting amount with respect to the scanning direction on an image carrier of each image forming unit, and halftone processing is then performed, thus suppressing caused by color shifting correction, and forming a high-quality image. An image forming engine has color shifting amount storage units storing actual shifting amounts with respect to ideal scan directions on image carriers in image forming units. Color shifting correction amount arithmetic units calculate color shifting correction amounts for respective color components using stored color shifting amounts. Color shifting correction units perform color shifting correction by converting coordinates upon reading image data from bitmap memories using calculated color shifting correction amounts, and perform tone correction. Data after tone correction undergo halftone processing. PWM processors generate PWM signals for scanning, and output them to exposure units of respective image forming units.
摘要翻译：首先基于表示各图像形成单元的图像载体上的相对于扫描方向的移动量的移动量信息进行颜色偏移校正，然后进行半色调处理，从而由颜色偏移校正引起的抑制，并且形成高质量形象。图像形成引擎具有在图像形成单元中存储相对于图像载体上的理想扫描方向的实际移动量的色移量存储单元。颜色偏移校正量算术单元使用存储的颜色偏移量来计算各个颜色分量的颜色偏移校正量。色移校正单元通过使用计算出的色移校正量从位图存储器读取图像数据时的坐标转换来执行色移校正，并执行色调校正。色调校正后的数据经过半色调处理。 PWM处理器产生用于扫描的PWM信号，并将其输出到各个图像形成单元的曝光单元。

8. 发明申请

US20140118755A1 IMAGE FORMING APPARATUS AND ITS CONTROL METHOD 有权
标题翻译：图像形成装置及其控制方法
公开(公告)号：US20140118755A1
公开(公告)日：2014-05-01
申请号：US14049214
申请日：2013-10-09
申请人： Canon Kabushiki Kaisha
发明人： Tsutomu Takata , Hiroki Kitamura , Yoshiyuki Akiba , Shuichi Nakamura , Yusuke Yamamoto , Masanao Motoyama , Takeshi Akiyama , Kenzo Tojima , Takaaki Nagaoka
IPC分类号： H04N1/60 , G03G15/00
CPC分类号： G06K15/1878 , G06K15/14 , G06K15/188 , G06K15/1881 , H04N1/29 , H04N1/40062 , H04N1/4092 , H04N1/506 , H04N1/52 , H04N1/58 , H04N1/60 , H04N1/6027 , H04N1/6072
摘要： Color shifting correction is performed first based on shifting amount information indicating a shifting amount with respect to the scanning direction on an image carrier of each image forming unit, and halftone processing is then performed, thus suppressing caused by color shifting correction, and forming a high-quality image. An image forming engine has color shifting amount storage units storing actual shifting amounts with respect to ideal scan directions on image carriers in image forming units. Color shifting correction amount arithmetic units calculate color shifting correction amounts for respective color components using stored color shifting amounts. Color shifting correction units perform color shifting correction by converting coordinates upon reading image data from bitmap memories using calculated color shifting correction amounts, and perform tone correction. Data after tone correction undergo halftone processing. PWM processors generate PWM signals for scanning, and output them to exposure units of respective image forming units.
摘要翻译：首先基于表示各图像形成单元的图像载体上的相对于扫描方向的移动量的移动量信息进行颜色偏移校正，然后进行半色调处理，从而由颜色偏移校正引起的抑制，并且形成高质量形象。图像形成引擎具有在图像形成单元中存储相对于图像载体上的理想扫描方向的实际移动量的色移量存储单元。颜色偏移校正量算术单元使用存储的颜色偏移量来计算各个颜色分量的颜色偏移校正量。色移校正单元通过使用计算出的色移校正量从位图存储器读取图像数据时的坐标转换来执行色移校正，并执行色调校正。色调校正后的数据经过半色调处理。 PWM处理器产生用于扫描的PWM信号，并将其输出到各个图像形成单元的曝光单元。

9. 发明申请

US20220318959A1 IMAGING DEVICE, IMAGE PROCESSING DEVICE, MOVING DEVICE, CONTROL METHOD, AND STORAGE MEDIUM 有权
公开(公告)号：US20220318959A1
公开(公告)日：2022-10-06
申请号：US17702405
申请日：2022-03-23
申请人： CANON KABUSHIKI KAISHA
发明人： Yasunari Nagamatsu , Yusuke Yamamoto , Tohru Oyama
IPC分类号： G06T5/00 , H04N9/04 , H04N5/232 , G06T3/40 , G06T7/90
摘要： For example, in order to enable an RCCB sensor or a specific optical system to perform an appropriate image correction process (distortion correction and the like), an imaging device includes an imaging element, an optical system configured to form an image on an imaging surface of the imaging element and has a characteristic in which an image formation magnification differs depending on a position in the imaging surface, a demosaic unit configured to generate color image data of at least two colors from the data output from the imaging element, and a distortion correction unit configured to correct distortion of the color image data of at least two colors generated by the demosaic unit.

10. 发明授权

US10771657B2 Image processing apparatus and image processing method quantizing first and second gradation data to generate first and second quantization data 有权
公开(公告)号：US10771657B2
公开(公告)日：2020-09-08
申请号：US16519680
申请日：2019-07-23
申请人： CANON KABUSHIKI KAISHA
发明人： Tsukasa Doi , Hirokazu Tanaka , Hisashi Ishikawa , Shoei Moribe , Yusuke Yamamoto , Shigeo Kodama , Yuta Ikeshima
IPC分类号： G06K15/00 , H04N1/60 , G06K15/02
摘要： 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.

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