公开(公告)号：US09195917B2

公开(公告)日：2015-11-24

申请号：US14076719

申请日：2013-11-11

Applicant: CANON KABUSHIKI KAISHA

Inventor： Junichi Nakagawa ,  Mitsuhiro Ono ,  Hidetsugu Kagawa ,  Nobutaka Miyake ,  Akitoshi Yamada ,  Fumitaka Goto ,  Ryosuke Iguchi ,  Tomokazu Ishikawa ,  Senichi Saito

IPC: G06K15/00 ,  H04N1/405 ,  G06K15/10 ,  H04N1/52 ,  H04N1/191

CPC classification number: G06K15/107 ,  G06K15/105 ,  G06K2215/111 ,  H04N1/1911 ,  H04N1/1915 ,  H04N1/4051 ,  H04N1/4053 ,  H04N1/52

Abstract: In order to print a unit area of a print medium by a first printing scan and a second printing scan, dither patterns are formed which can control the arrangement of dots on the print medium without adverse effects of density unevenness and graininess, that are caused by printing position displacement. Regarding first and second dither patterns, information indicating whether or not a threshold is already set to a reference pixel and one or more pixels around the reference pixel in the first dither pattern is obtained for cases where each pixel in the first dither pattern is the reference pixel. A pixel in the second dither pattern to which a predetermined pixel is to be set is determined based on the obtained information. The first and second dither patterns formed in the above manner are associated with the first printing scan and the second printing scan, respectively.

Abstract translation: 为了通过第一次打印扫描和第二次打印扫描来打印打印介质的单位区域，形成了可以控制打印介质上的点的布置的抖动图案，而不会产生由浓度不均匀性和颗粒性引起的不良影响 打印位置位移。 关于第一和第二抖动图案，在第一抖动图案中的每个像素为参考的情况下，获得指示阈值是否已被设置为参考像素的信息和第一抖动图案中的参考像素周围的一个或多个像素 像素。 基于获得的信息确定要设置预定像素的第二抖动图案中的像素。 以上述方式形成的第一和第二抖动图案分别与第一打印扫描和第二打印扫描相关联。

公开(公告)号：US20140139885A1

公开(公告)日：2014-05-22

申请号：US14076719

申请日：2013-11-11

Applicant: CANON KABUSHIKI KAISHA

Inventor： Junichi Nakagawa ,  Mitsuhiro Ono ,  Hidetsugu Kagawa ,  Nobutaka Miyake ,  Akitoshi Yamada ,  Fumitaka Goto ,  Ryosuke Iguchi ,  Tomokazu Ishikawa ,  Senichi Saito

IPC: G06K15/02

CPC classification number: G06K15/107 ,  G06K15/105 ,  G06K2215/111 ,  H04N1/1911 ,  H04N1/1915 ,  H04N1/4051 ,  H04N1/4053 ,  H04N1/52

Abstract: In order to print a unit area of a print medium by a first printing scan and a second printing scan, dither patterns are formed which can control the arrangement of dots on the print medium without adverse effects of density unevenness and graininess, that are caused by printing position displacement. Regarding first and second dither patterns, information indicating whether or not a threshold is already set to a reference pixel and one or more pixels around the reference pixel in the first dither pattern is obtained for cases where each pixel in the first dither pattern is the reference pixel. A pixel in the second dither pattern to which a predetermined pixel is to be set is determined based on the obtained information. The first and second dither patterns formed in the above manner are associated with the first printing scan and the second printing scan, respectively.

Abstract translation: 为了通过第一次打印扫描和第二次打印扫描来打印打印介质的单位区域，形成了可以控制打印介质上的点的布置的抖动图案，而不会产生由浓度不均匀性和颗粒性引起的不良影响 打印位置位移。 关于第一和第二抖动图案，在第一抖动图案中的每个像素为参考的情况下，获得指示阈值是否已被设置为参考像素的信息和第一抖动图案中的参考像素周围的一个或多个像素 像素。 基于获得的信息确定要设置预定像素的第二抖动图案中的像素。 以上述方式形成的第一和第二抖动图案分别与第一打印扫描和第二打印扫描相关联。

公开(公告)号：US20140139852A1

公开(公告)日：2014-05-22

申请号：US14076608

申请日：2013-11-11

Applicant: CANON KABUSHIKI KAISHA

Inventor： Akitoshi Yamada ,  Tomokazu Ishikawa ,  Senichi Saito ,  Fumitaka Goto ,  Nobutaka Miyake ,  Mitsuhiro Ono ,  Ryosuke Iguchi ,  Hidetsugu Kagawa ,  Junichi Nakagawa

IPC: G06K15/02

CPC classification number: G06K15/02 ,  H04N1/4015

Abstract: As viewed for each processing unit in HS processing, a processing unit width is more than 1 pixel, so that threshold arrangement corresponding to a target quality of an image intended by a dither matrix is kept while a possibility of avoiding the zero number of dots from being generated can be enhanced. Moreover, the threshold arrangement is kept while a possibility of generating the same number of dots in processing units can be enhanced. Consequently, the threshold arrangement corresponding to a predetermined target quality of an image intended by a dither matrix is kept while it is possible to reduce occurrence of an uneven density caused by the HS processing. Thus, it is possible to prevent the threshold arrangement from being limited by the HS according to the degree of the reduction.

Abstract translation: 如在HS处理中为每个处理单元所看到的，处理单元宽度大于1个像素，从而保持与抖动矩阵所要求的图像的目标质量对应的阈值排列，同时避免零点数的可能性 可以增强生成。 此外，保持阈值布置，同时可以提高在处理单元中产生相同数量的点的可能性。 因此，保持对应于由抖动矩阵预期的图像的预定目标质量的阈值排列，同时可以减少由HS处理引起的不均匀浓度的发生。 因此，可以根据减少的程度来防止阈值布置受到HS的限制。

公开(公告)号：US20140010467A1

公开(公告)日：2014-01-09

申请号：US13933430

申请日：2013-07-02

Applicant: Canon Kabushiki Kaisha

Inventor： Yugo Mochizuki ,  Fumihiro Goto ,  Akihiko Nakatani ,  Okinori Tsuchiya ,  Takashi Nakamura ,  Takashi Fujita ,  Ayumi Sano ,  Mitsuhiro Ono ,  Hidetsugu Kagawa

IPC: G06T9/00

CPC classification number: H04N1/64 ,  G06T9/00 ,  H04N1/41 ,  H04N1/4115 ,  H04N1/642 ,  H04N19/102 ,  H04N19/132 ,  H04N19/14 ,  H04N19/176 ,  H04N19/186 ,  H04N19/59 ,  H04N19/60

Abstract: In an image processing apparatus for encoding image data and a method of controlling the same, whether an attribute of each of a plurality of areas in image data corresponds to an edge in an image based on the image data is determined, and one of a plurality of sub-sampling processes is selected according to the determination for each of the plurality of areas. Note that the plurality of sub-sampling processes can sub-sample color difference components of each of the plurality of areas by different processes. By the sub-sampling process selected as that corresponding to each of the plurality of areas, each of the plurality of areas is sub-sampled to encode the image data.

Abstract translation: 在对图像数据进行编码的图像处理装置及其控制方法中，确定图像数据中的多个区域中的每一个的属性是否对应于基于图像数据的图像中的边缘，并且确定多个区域中的一个 根据多个区域中的每一个的确定来选择子采样处理。 注意，多个子采样处理可以通过不同的处理对多个区域中的每一个的色差分量进行子采样。 通过选择为与多个区域中的每一个相对应的子采样处理，对多个区域中的每一个进行子采样以对图像数据进行编码。