公开(公告)号：US06601939B2

公开(公告)日：2003-08-05

申请号：US09940644

申请日：2001-08-29

申请人： Miyuki Fujita ,  Hiroshi Tajika ,  Atsushi Ushiroda ,  Yuji Konno ,  Norihiro Kawatoko ,  Takayuki Ogasahara ,  Tetsuya Edamura ,  Tetsuhiro Maeda ,  Atsuhiko Masuyama

发明人： Miyuki Fujita ,  Hiroshi Tajika ,  Atsushi Ushiroda ,  Yuji Konno ,  Norihiro Kawatoko ,  Takayuki Ogasahara ,  Tetsuya Edamura ,  Tetsuhiro Maeda ,  Atsuhiko Masuyama

IPC分类号： B41J2205

CPC分类号： G06K15/107

摘要： A color ink-jet head, having plural arrays of nozzles side by side in a main scan direction corresponding to different color inks, is moved to scan reciprocally. In a multi-pass recording for divided recording on an area by scanning at plural times with the head, an ink firstly landed on recording of the area determines a prioritized color influential on the color tone. Moreover, a printing medium is largely covered by the recording of first two passes. A harmful influence on a whole image by the color irregularity can reduced by suppressing the color irregularity in the two passes, therefore, the data recording ratio of the first pass to the area is set smaller than that of the second pass and thereafter. Further, for such the control, a pseudo periodical masking data arranging record prohibiting pixels and record permitting pixels in a visually agreeable state is introduced.

摘要翻译： 在与不同颜色的油墨对应的主扫描方向上并排配置有多个喷嘴阵列的彩色喷墨头被移动扫描。 在通过用头扫描多次的区域上的分割记录的多遍记录中，首先在区域的记录上着陆的墨水确定对色调有影响的优先级的颜色。 此外，打印介质大部分被前两次通过的记录所覆盖。 通过抑制两次通过中的颜色不规则性，可以减少由颜色不均匀性对整个图像的有害影响，因此，第一遍的区域的数据记录比率被设定为小于第二遍的数据记录率。 此外，对于这样的控制，引入了禁止像素的伪周期性屏蔽数据排列记录和在视觉上令人满意的状态下记录许可像素。

公开(公告)号：US06874864B1

公开(公告)日：2005-04-05

申请号：US09629093

申请日：2000-07-31

申请人： Tetsuhiro Maeda ,  Hiroshi Tajika ,  Atsushi Ushiroda ,  Miyuki Fujita ,  Yuji Konno ,  Norihiro Kawatoko ,  Takayuki Ogasahara ,  Tetsuya Edamura

发明人： Tetsuhiro Maeda ,  Hiroshi Tajika ,  Atsushi Ushiroda ,  Miyuki Fujita ,  Yuji Konno ,  Norihiro Kawatoko ,  Takayuki Ogasahara ,  Tetsuya Edamura

IPC分类号： B41J2/505 ,  G06K15/10 ,  B41J2/15

CPC分类号： B41J2/5058 ,  G06K15/105

摘要： An apparatus and method are provided to enable high speed printing of an image with high resolution while suppressing degradation of image quality due to white stripes and density variations. In an ink jet printing apparatus using a multi-pass printing system, the same scan print area is divided at a predetermined pitch and the printing duties of the divided areas determined by the thinning out mask pattern are set to different values. In regard to the same scan print area formed by a plurality of the main scans, the divided areas corresponding to the ends of the print head have their printing duties set smaller than those of the divided areas on the inner side of the ends of the print head.

摘要翻译： 提供了一种设备和方法，以便能够以高分辨率高速打印图像，同时抑制由于白色条纹和密度变化引起的图像质量的劣化。 在使用多通道打印系统的喷墨打印设备中，以预定间距划分相同的扫描打印区域，并且将由稀疏掩模图案确定的划分区域的打印任务设置为不同的值。 关于由多个主扫描形成的相同的扫描打印区域，与打印头的端部相对应的分割区域的打印任务设置为小于打印端部的内侧上的分割区域的打印任务 头。

公开(公告)号：US08130415B2

公开(公告)日：2012-03-06

申请号：US13102285

申请日：2011-05-06

申请人： Tomokazu Yanai ,  Yumi Watanabe ,  Atsushi Ushiroda ,  Hisashi Ishikawa

发明人： Tomokazu Yanai ,  Yumi Watanabe ,  Atsushi Ushiroda ,  Hisashi Ishikawa

IPC分类号： G06K15/00 ,  H04N1/46

CPC分类号： G06K15/107 ,  H04N1/1911 ,  H04N1/1915 ,  H04N1/4053 ,  H04N1/4092 ,  H04N1/52

摘要： In order to form a high-quality image, upon execution of multi-pass printing using a printing head with a plurality of nozzles, an image processing apparatus calculates, using a scan duty setting unit, scan duty data for respective nozzles for each scan of the printing head in accordance with input image data. A halftone processor generates a dot pattern to be formed by applying N-ary processing based on predetermined constraining condition information to the calculated scan duty data. A constraining, condition information calculation unit generates constraining condition information to be referred to by the halftone processor at the time of the next scan. The constraining condition information is set so that the phase of a next dot pattern to be generated has an opposite phase relationship in a low frequency region with respect, to the already printed dot pattern.

摘要翻译： 为了形成高质量的图像，在使用具有多个喷嘴的打印头执行多次打印时，图像处理装置使用扫描占空比设置单元计算每个扫描的各个喷嘴的扫描占空比数据 打印头根据输入图像数据。 半色调处理器​​通过将基于预定约束条件信息的N进制处理应用于计算出的扫描占空比数据而产生点形式。 约束条件信息计算单元产生在下次扫描时由半色调处理器​​参考的约束条件信息。 约束条件信息被设置为使得相对于已经打印的点图案，要生成的下一点图案的相位在低频区域中具有相反的相位关系。

公开(公告)号：US07948657B2

公开(公告)日：2011-05-24

申请号：US11473238

申请日：2006-06-23

申请人： Tomokazu Yanai ,  Atsushi Ushiroda

发明人： Tomokazu Yanai ,  Atsushi Ushiroda

IPC分类号： H04N1/40 ,  G06K15/00

CPC分类号： H04N1/40087

摘要： An image processing method for deciding the quantization data on each image plane of the image data composed of at least first and second image planes includes performing a quantization process for the sum total value of pixel values existing at the same position on the first and second image planes, using a first threshold, to decide a quantized value, and performing an arithmetical operation on the decided quantized value, the pixel value of any one of the first and second image planes and a second threshold, to generate the quantization data on each of the first and second image planes.

摘要翻译： 用于决定由至少第一和第二图像平面组成的图像数据的每个图像平面上的量化数据的图像处理方法包括对存在于第一和第二图像上的相同位置处的像素值的总和值执行量化处理 平面，使用第一阈值来决定量化值，并对所确定的量化值，第一和第二图像平面中的任何一个的像素值和第二阈值执行算术运算，以在第一阈值和第二阈值之间生成量化数据 第一和第二图像平面。

公开(公告)号：US20060290987A1

公开(公告)日：2006-12-28

申请号：US11473238

申请日：2006-06-23

申请人： Tomokazu Yanai ,  Atsushi Ushiroda

发明人： Tomokazu Yanai ,  Atsushi Ushiroda

IPC分类号： H04N1/40

CPC分类号： H04N1/40087

摘要： An image processing method for deciding the quantization data on each image plane of the image data composed of at least first and second image planes includes performing a quantization process for the sum total value of pixel values existing at the same position on the first and second image planes, using a first threshold, to decide a quantized value, and performing an arithmetical operation on the decided quantized value, the pixel value of any one of the first and second image planes and a second threshold, to generate the quantization data on each of the first and second image planes.

摘要翻译： 用于决定由至少第一和第二图像平面组成的图像数据的每个图像平面上的量化数据的图像处理方法包括对存在于第一和第二图像上的相同位置处的像素值的总和值执行量化处理 平面，使用第一阈值来决定量化值，并对所确定的量化值，第一和第二图像平面中的任何一个的像素值和第二阈值执行算术运算，以在第一阈值和第二阈值之间生成量化数据 第一和第二图像平面。

公开(公告)号：US06831756B1

公开(公告)日：2004-12-14

申请号：US09537290

申请日：2000-03-29

申请人： Atsushi Ushiroda

发明人： Atsushi Ushiroda

IPC分类号： H04N1405

CPC分类号： H04N1/405 ,  H04N1/407 ,  H04N1/6097

摘要： From a first threshold mask having threshold values corresponding to the number of gray levels, which is larger than that of an input image, a second threshold mask having threshold values corresponding to the number of gray levels, which is equal to that of an input image, is generated on the basis of tone reproduction characteristics corresponding to the type of paper used in a printer or the printer state. Using the generated second threshold mask, the number of gray levels of the input image is converted, and the converted image is output to an output apparatus. In this manner, a high-quality image can be output by making halftone conversion corresponding to the tone reproduction characteristics of the output apparatus by a small memory size without decreasing the number of gray levels of the input image.

摘要翻译： 从具有对应于大于输入图像的灰度级数的灰度级数的阈值的第一阈值掩码，具有与输入图像相等的灰度级数对应的阈值的第二阈值掩码 是基于与打印机中使用的纸张类型或打印机状态相对应的色调再现特性而生成的。 使用所生成的第二阈值掩码，转换输入图像的灰度级数，并将转换的图像输出到输出装置。以这种方式，可以通过对应于色调的半色调转换来输出高质量图像 通过小的存储器尺寸输出设备的再现特性，而不减少输入图像的灰度级数。

公开(公告)号：US20090097776A1

公开(公告)日：2009-04-16

申请号：US12236185

申请日：2008-09-23

申请人： Hitoshi Fukamachi ,  Hideki Kubo ,  Atsushi Ushiroda

发明人： Hitoshi Fukamachi ,  Hideki Kubo ,  Atsushi Ushiroda

IPC分类号： G06K9/40

CPC分类号： G06K15/1881 ,  H04N1/405 ,  H04N1/4092

摘要： This invention obtains a high-quality output image in which a jaggy or a disconnection of a thin line hardly stands out. An edge detection unit detects whether the pixel of interest is an edge pixel or a non-edge pixel. A screen processing unit performs screen processing for the pixel of interest to determine the output value of the N-level tone. A calculation unit performs filtering processing having a preset visual sense characteristic for an area including the pixel of interest to calculate the target value of the pixel of interest, and corrects the value of the pixel of interest so as to come close to the target value, thereby determining the output value of the N-level tone. The selector selects, according to the detection result by the edge detection unit, either the result from the calculation unit or that from the screen processing unit.

摘要翻译： 本发明获得了粗纱或细线的断开几乎不突出的高质量输出图像。 边缘检测单元检测感兴趣的像素是边缘像素还是非边缘像素。 屏幕处理单元对感兴趣的像素执行屏幕处理以确定N级音调的输出值。 计算单元对包括感兴趣像素的区域执行具有预设的视觉特性的滤波处理，以计算感兴趣像素的目标值，并且校正感兴趣像素的值以接近目标值， 从而确定N级音调的输出值。 选择器根据边缘检测单元的检测结果选择来自计算单元的结果或来自屏幕处理单元的结果。

公开(公告)号：US5748772A

公开(公告)日：1998-05-05

申请号：US794769

申请日：1997-02-03

申请人： Takahiro Moro ,  Katsumi Masaki ,  Ken Onodera ,  Takafumi Sawaki ,  Atsushi Ushiroda

发明人： Takahiro Moro ,  Katsumi Masaki ,  Ken Onodera ,  Takafumi Sawaki ,  Atsushi Ushiroda

IPC分类号： H04N1/46 ,  G06T5/00 ,  H04N1/405 ,  H04N1/52 ,  G06K9/00

CPC分类号： H04N1/4055 ,  H04N1/52

摘要： An image processing apparatus of a digital copying machine, a digital facsimile, or a printer comprises an input unit to input multi-level data; an arithmetic operating circuit for adding error data to the input multi-level data and for calculating error correction data; a selector to select a predetermined dot pattern on the basis of the error correction data; an error calculation circuit to calculate a difference between the representative value for each dot pattern and the error correction data; a storage memory for storing the difference as error data into a memory; and a dot pattern memory in which dot patterns corresponding to a plurality of colors have been stored. The input unit inputs multi-level image data of a plurality of colors and the selector selects the dot pattern whose dot arrangement differs in accordance with the color of the multi-level image data.

摘要翻译： 数字复印机，数字传真机或打印机的图像处理装置包括：输入单元，输入多级数据; 算术运算电路，用于将误差数据添加到输入的多电平数据并用于计算误差校正数据; 选择器，其基于所述纠错数据来选择预定的点​​图案; 误差计算电路，用于计算每个点阵图形的代表值与纠错数据之间的差值; 存储存储器，用于将所述差值作为误差数据存储到存储器中; 以及其中存储了与多种颜色对应的点图案的点图形存储器。 输入单元输入多种颜色的多级图像数据，并且选择器根据多级图像数据的颜色选择点排列不同的点图案。

公开(公告)号：US08922856B2

公开(公告)日：2014-12-30

申请号：US12022286

申请日：2008-01-30

申请人： Tomokazu Yanai ,  Atsushi Ushiroda

发明人： Tomokazu Yanai ,  Atsushi Ushiroda

IPC分类号： H04N1/46 ,  H04N1/40 ,  H04N1/60 ,  G06K15/10 ,  H04N1/405

CPC分类号： H04N1/405 ,  G06K15/107

摘要： In order to form a high-quality image, upon execution of multi-pass printing using a printing head with a plurality of nozzles, an image processing apparatus calculates, using a scan duty setting unit (105), scan duty data for respective nozzles for each scan of the printing head in accordance with input image data. A halftone processor (108) generates a dot pattern to be formed by applying N-ary processing. The constraining condition information is set so that the phase of spatial frequencies of a next dot pattern to be generated has an opposite phase relationship in a low frequency region with respect to the already printed dot pattern.

摘要翻译： 为了形成高质量图像，在使用具有多个喷嘴的打印头执行多次打印时，图像处理装置使用扫描占空比设置单元（105）计算各喷嘴的扫描占空比数据 根据输入图像数据对打印头进行每次扫描。 半色调处理器​​（108）产生通过应用N元处理形成的点图案。 约束条件信息被设置为使得相对于已经打印的点图案，要生成的下一个点图案的空间频率的相位在低频区域中具有相反的相位关系。

公开(公告)号：US08687240B2

公开(公告)日：2014-04-01

申请号：US12236185

申请日：2008-09-23

申请人： Hitoshi Fukamachi ,  Hideki Kubo ,  Atsushi Ushiroda

发明人： Hitoshi Fukamachi ,  Hideki Kubo ,  Atsushi Ushiroda

IPC分类号： G06T5/00 ,  G06K9/40 ,  G03G13/04

CPC分类号： G06K15/1881 ,  H04N1/405 ,  H04N1/4092

摘要： This invention obtains a high-quality output image in which a jaggy or a disconnection of a thin line hardly stands out. An edge detection unit detects whether the pixel of interest is an edge pixel or a non-edge pixel. A screen processing unit performs screen processing for the pixel of interest to determine the output value of the N-level tone. A calculation unit performs filtering processing having a preset visual sense characteristic for an area including the pixel of interest to calculate the target value of the pixel of interest, and corrects the value of the pixel of interest so as to come close to the target value, thereby determining the output value of the N-level tone. The selector selects, according to the detection result by the edge detection unit, either the result from the calculation unit or that from the screen processing unit.

摘要翻译： 本发明获得了粗纱或细线的断开几乎不突出的高质量输出图像。 边缘检测单元检测感兴趣的像素是边缘像素还是非边缘像素。 屏幕处理单元对感兴趣的像素执行屏幕处理以确定N级音调的输出值。 计算单元对包括感兴趣像素的区域执行具有预设的视觉特性的滤波处理，以计算感兴趣像素的目标值，并且校正感兴趣像素的值以接近目标值， 从而确定N级音调的输出值。 选择器根据边缘检测单元的检测结果选择来自计算单元的结果或来自屏幕处理单元的结果。