公开(公告)号：US20060077469A1

公开(公告)日：2006-04-13

申请号：US11208631

申请日：2005-08-23

申请人： Hiroshi Asai ,  Yasuhiro Takemoto

发明人： Hiroshi Asai ,  Yasuhiro Takemoto

IPC分类号： H04N1/405

CPC分类号： H04N1/4055

摘要： In a matrix area (720), a plurality of highlight-side dot centers (731) and a plurality of shadow-side dot centers (741) are regularly arranged and a plurality of reference points (751) are set while being distributed almost uniformly. Each of the dot centers (731, 741) is rotated about a nearest reference point (751). Threshold values of the matrix area (720) are determined so that halftone dot areas should be changed around a plurality of highlight-side dot centers (731) after being rotated in accordance with the variation in gray level on the highlight side and a halftone dot area (i.e., joined dot areas) should be changed around a plurality of shadow-side dot centers after being rotated in accordance with the variation in gray level on the shadow side. In a halftone dot image generated by using the matrix area which is thus generated, it is possible to suppress moire and graininess.

摘要翻译： 在矩阵区域（720）中，规则地布置多个高亮侧点中心（731）和多个阴影侧点中心（741），并且分布几乎均匀地设置多个参考点（751） 。 每个点中心（731,741）围绕最近的参考点（751）旋转。 确定矩阵区域（720）的阈值，使得根据高亮侧的灰度级的变化以及半色调点之后，在多个突出显示侧点中心（731）周围改变半色调点区域 应当根据阴影侧的灰度级的变化旋转后，围绕多个阴影侧点中心改变区域（即，接合点区域）。 在通过使用由此产生的矩阵区域产生的半色调点图像中，可以抑制莫尔条纹和粒状。

公开(公告)号：US07471421B2

公开(公告)日：2008-12-30

申请号：US11208631

申请日：2005-08-23

申请人： Hiroshi Asai ,  Yasuhiro Takemoto

发明人： Hiroshi Asai ,  Yasuhiro Takemoto

IPC分类号： H04N1/405

CPC分类号： H04N1/4055

摘要： In a matrix area (720), a plurality of highlight-side dot centers (731) and a plurality of shadow-side dot centers (741) are regularly arranged and a plurality of reference points (751) are set while being distributed almost uniformly. Each of the dot centers (731, 741) is rotated about a nearest reference point (751). Threshold values of the matrix area (720) are determined so that halftone dot areas should be changed around a plurality of highlight-side dot centers (731) after being rotated in accordance with the variation in gray level on the highlight side and a halftone dot area (i.e., joined dot areas) should be changed around a plurality of shadow-side dot centers after being rotated in accordance with the variation in gray level on the shadow side. In a halftone dot image generated by using the matrix area which is thus generated, it is possible to suppress moire and graininess.

摘要翻译： 在矩阵区域（720）中，规则地布置多个高亮侧点中心（731）和多个阴影侧点中心（741），并且分布几乎均匀地设置多个参考点（751） 。 每个点中心（731,741）围绕最近的参考点（751）旋转。 确定矩阵区域（720）的阈值，使得根据高亮侧的灰度级的变化以及半色调点之后，在多个突出显示侧点中心（731）周围改变半色调点区域 应当根据阴影侧的灰度级的变化旋转后，围绕多个阴影侧点中心改变区域（即，接合点区域）。 在通过使用由此产生的矩阵区域产生的半色调点图像中，可以抑制莫尔条纹和粒状。

公开(公告)号：US07457004B2

公开(公告)日：2008-11-25

申请号：US10973446

申请日：2004-10-27

申请人： Hiroshi Asai ,  Yasuhiro Takemoto

发明人： Hiroshi Asai ,  Yasuhiro Takemoto

IPC分类号： H04N1/405 ,  H04N1/409

CPC分类号： H04N1/4055 ,  H04N1/405

摘要： Halftone cells each serving as a unit for formation of a dot are arranged in irregular shapes at random and divided into two groups. The halftone cells (720) in the first group are fewer than the halftone cells (730) in the second group and dispersed, and the area of each of the halftone cells (720) in the first group is set larger than that in the second group. The dot growth speed of the halftone cells (720) in the first group is higher than that of the halftone cells (730) in the second group. This allows formation of fine halftone dots consisting of the halftone cells in the first and second groups, and it is possible to reduce banding appearing in a main scan direction during recording of the halftone dots, with low-frequency components in spatial frequency of the halftone dots caused by the halftone cells (720) in the first group.

摘要翻译： 每个用作形成点的单元的半色调单元被随机布置成不规则形状并分成两组。 第一组中的半色调细胞（720）比第二组中的半色调细胞（730）少，并且分散，并且第一组中的每个半色调细胞（720）的面积被设定为大于第二组中的半色调细胞 组。 第一组中的半色调细胞（720）的点生长速度高于第二组中的半色调细胞（730）的点生长速度。 这允许形成由第一和第二组中的半色调细胞组成的细的半色调点，并且可以减少在半色调点记录期间在主扫描方向上出现的条纹，其中半色调的空间频率的低频分量 由第一组中的半色调细胞（720）引起的点。

公开(公告)号：US08040556B2

公开(公告)日：2011-10-18

申请号：US12115801

申请日：2008-05-06

申请人： Yasuhiro Takemoto ,  Atsushi Imamura ,  Hiroshi Asai

发明人： Yasuhiro Takemoto ,  Atsushi Imamura ,  Hiroshi Asai

IPC分类号： G06K1/00 ,  B41J29/38

CPC分类号： H04N1/405 ,  G06K15/107

摘要： A head in a printer has an outlet row including a plurality of outlets arranged in a width direction perpendicular to a scan direction. A threshold matrix is stored in a main body control part, and sleep elements representing sleep of ejection of ink are arranged in the threshold matrix at a regular interval in each element row which is a plurality of elements arranged in a row direction corresponding to the width direction. The threshold matrix is compared with a grayscale original image to generate data of a halftone image where during printing, the number of outlets included in each outlet group not brought into sleep state continuously in the width direction is made equal to or larger than 1 and equal to or smaller than a predetermined number. Thus, it is possible to easily suppress occurrence of unevenness in a printed image, caused by cross talk between outlets.

摘要翻译： 打印机中的头部具有出口列，其包括沿垂直于扫描方向的宽度方向布置的多个出口。 阈值矩阵被存储在主体控制部分中，并且表示墨的弹出睡眠的睡眠元素以规则的间隔布置在每个元素行中，该元素行是排列在与宽度相对应的行方向上的多个元素 方向。 将阈值矩阵与灰度原始图像进行比较以产生半色调图像的数据，其中在打印期间，包括在不在宽度方向上连续进入睡眠状态的每个出口组中的出口的数量等于或大于1并且等于 达到或小于预定数量。 因此，可以容易地抑制由出口之间的串扰引起的印刷图像中的不均匀性的发生。

公开(公告)号：US07782493B2

公开(公告)日：2010-08-24

申请号：US11109728

申请日：2005-04-20

申请人： Hiroshi Asai ,  Masayuki Nakano ,  Yasuhiro Takemoto

发明人： Hiroshi Asai ,  Masayuki Nakano ,  Yasuhiro Takemoto

IPC分类号： H04N1/405

CPC分类号： H04N1/4051 ,  H04N1/4055 ,  H04N1/52

摘要： To generate a threshold matrix which is compared with an original image in creating a halftone dot image for each color component, in a matrix area for one color component, dot centers are arranged almost uniformly in a random fashion at a predetermined density and in a matrix area for another color component, dot centers are arranged almost uniformly in a random fashion at a density about 0.7 times the predetermined density. Then, threshold values are set so that dots should grow around the dot centers in accordance with an increase in gray level of the original image, to generate the threshold matrix for each color component. In creating the halftone dot images by using these threshold matrixes, characteristics of spatial frequency of the halftone dot images of these color components can be represented in a frequency space as areas (75K, 75C) in a shape of concentric rings. As a result, it is possible to create a multicolor halftone dot image with less graininess, with no portions approximate to each other in the characteristics of spatial frequency of these halftone dot images.

摘要翻译： 为了产生与原始图像进行比较以创建每个颜色分量的半色调点图像的阈值矩阵，在一个颜色分量的矩阵区域中，以预定密度和矩阵的随机方式几乎均匀地布置点中心 面积为另一种颜色分量，点中心几乎均匀地以约0.7倍于预定密度的密度随机排列。 然后，设置阈值，使得根据原始图像的灰度级的增加，点应该围绕点中心生长，以产生每个颜色分量的阈值矩阵。 在通过使用这些阈值矩阵来创建半色调点图像时，这些颜色分量的半色调点图像的空间频率特性可以在频率空间中表示为同心圆形区域（75K，75C）。 结果，可以产生具有较少颗粒度的多色半色调点图像，在这些半色调网点图像的空间频率的特性中没有彼此近似的部分。

公开(公告)号：US07532365B2

公开(公告)日：2009-05-12

申请号：US11326481

申请日：2006-01-06

申请人： Hiroshi Asai ,  Masayuki Nakano ,  Yasuhiro Takemoto

发明人： Hiroshi Asai ,  Masayuki Nakano ,  Yasuhiro Takemoto

IPC分类号： H04N1/405 ,  G06K15/00 ,  H04N1/40 ,  H04N1/407 ,  B41C1/02 ,  G06K9/46 ,  G06K9/38 ,  G09G5/02

CPC分类号： H04N1/4051 ,  H04N1/4055

摘要： In a threshold matrix generation part 3 implemented by a computer, a tint image in a specified gray level is generated from temporary lighting order set in a matrix area, and a smoothing operation is performed on the tint image, to generate a grayscale evaluation image. The lighting order is modified by changing ordinal numbers in the lighting order of respective positions included in specified areas in the matrix area which correspond to areas around boundaries of halftone dot areas in the tint image on the basis of values of corresponding pixels in the evaluation image. With this operation, when the smoothing operation is performed on a tint image in the specified gray level generated in accordance with a modified lighting order, a variation among values of pixels included in the specified areas becomes smaller than a variation among values of pixels included in the specified areas in a case where the smoothing operation is performed on the tint image in the specified gray level generated in accordance with an unmodified lighting order. Then, threshold values are determined in the matrix area with reflecting the modified lighting order, to generate the threshold matrix which is possible to suppress graininess in a generated halftone dot image.

摘要翻译： 在由计算机实现的阈值矩阵生成部分3中，从矩阵区域中设置的临时照明顺序生成指定灰度级的色调图像，并对色彩图像执行平滑处理，以生成灰度评估图像。 基于评价图像中的相应像素的值，通过改变与在色调图像中的半色调点区域的边界周围的区域相对应的矩阵区域中包括的指定区域中的各个位置的照明顺序，改变照明顺序 。 通过该操作，当对根据修改的照明顺序生成的指定灰度级中的色调图像执行平滑处理时，包括在指定区域中的像素值之间的变化变得小于包括在特定区域中的像素值之间的变化 在根据未修改的照明顺序生成的指定灰度级中的色调图像上执行平滑处理的情况下的指定区域。 然后，通过反映修改的照明顺序在矩阵区域中确定阈值，以生成可以抑制所产生的半色调点图像中的粒度的阈值矩阵。

公开(公告)号：US20080291473A1

公开(公告)日：2008-11-27

申请号：US12115801

申请日：2008-05-06

申请人： Yasuhiro Takemoto ,  Atsushi Imamura ,  Hiroshi Asai

发明人： Yasuhiro Takemoto ,  Atsushi Imamura ,  Hiroshi Asai

IPC分类号： G06K15/00

CPC分类号： H04N1/405 ,  G06K15/107

摘要： A head in a printer has an outlet row including a plurality of outlets arranged in a width direction perpendicular to a scan direction. A threshold matrix is stored in a main body control part, and sleep elements representing sleep of ejection of ink are arranged in the threshold matrix at a regular interval in each element row which is a plurality of elements arranged in a row direction corresponding to the width direction. The threshold matrix is compared with a grayscale original image to generate data of a halftone image where during printing, the number of outlets included in each outlet group not brought into sleep state continuously in the width direction is made equal to or larger than 1 and equal to or smaller than a predetermined number. Thus, it is possible to easily suppress occurrence of unevenness in a printed image, caused by cross talk between outlets.

摘要翻译： 打印机中的头部具有出口列，其包括沿垂直于扫描方向的宽度方向布置的多个出口。 阈值矩阵被存储在主体控制部分中，并且表示墨的弹出睡眠的睡眠元素以规则的间隔布置在每个元素行中，该元素行是排列在与宽度相对应的行方向上的多个元素 方向。 将阈值矩阵与灰度原始图像进行比较以产生半色调图像的数据，其中在打印期间，包括在不在宽度方向上连续进入睡眠状态的每个出口组中的出口的数量等于或大于1并且等于 达到或小于预定数量。 因此，可以容易地抑制由出口之间的串扰引起的印刷图像中的不均匀性的发生。

公开(公告)号：US20060152767A1

公开(公告)日：2006-07-13

申请号：US11326481

申请日：2006-01-06

申请人： Hiroshi Asai ,  Masayuki Nakano ,  Yasuhiro Takemoto

发明人： Hiroshi Asai ,  Masayuki Nakano ,  Yasuhiro Takemoto

IPC分类号： H04N1/40

CPC分类号： H04N1/4051 ,  H04N1/4055

摘要： In a threshold matrix generation part 3 implemented by a computer, a tint image in a specified gray level is generated from temporary lighting order set in a matrix area, and a smoothing operation is performed on the tint image, to generate a grayscale evaluation image. The lighting order is modified by changing ordinal numbers in the lighting order of respective positions included in specified areas in the matrix area which correspond to areas around boundaries of halftone dot areas in the tint image on the basis of values of corresponding pixels in the evaluation image. With this operation, when the smoothing operation is performed on a tint image in the specified gray level generated in accordance with a modified lighting order, a variation among values of pixels included in the specified areas becomes smaller than a variation among values of pixels included in the specified areas in a case where the smoothing operation is performed on the tint image in the specified gray level generated in accordance with an unmodified lighting order. Then, threshold values are determined in the matrix area with reflecting the modified lighting order, to generate the threshold matrix which is possible to suppress graininess in a generated halftone dot image.

公开(公告)号：US20050264834A1

公开(公告)日：2005-12-01

申请号：US11109728

申请日：2005-04-20

申请人： Hiroshi Asai ,  Masayuki Nakano ,  Yasuhiro Takemoto

发明人： Hiroshi Asai ,  Masayuki Nakano ,  Yasuhiro Takemoto

IPC分类号： H04N1/405 ,  H04N1/52 ,  H04N1/58

CPC分类号： H04N1/4051 ,  H04N1/4055 ,  H04N1/52

摘要： To generate a threshold matrix which is compared with an original image in creating a halftone dot image for each color component, in a matrix area for one color component, dot centers are arranged almost uniformly in a random fashion at a predetermined density and in a matrix area for another color component, dot centers are arranged almost uniformly in a random fashion at a density about 0.7 times the predetermined density. Then, threshold values are set so that dots should grow around the dot centers in accordance with an increase in gray level of the original image, to generate the threshold matrix for each color component. In creating the halftone dot images by using these threshold matrixes, characteristics of spatial frequency of the halftone dot images of these color components can be represented in a frequency space as areas (75K, 75C) in a shape of concentric rings. As a result, it is possible to create a multicolor halftone dot image with less graininess, with no portions approximate to each other in the characteristics of spatial frequency of these halftone dot images.

摘要翻译： 为了产生与原始图像进行比较以创建每个颜色分量的半色调点图像的阈值矩阵，在一个颜色分量的矩阵区域中，以预定密度和矩阵的随机方式几乎均匀地布置点中心 面积为另一种颜色分量，点中心几乎均匀地以约0.7倍于预定密度的密度随机排列。 然后，设置阈值，使得根据原始图像的灰度级的增加，点应该围绕点中心生长，以产生每个颜色分量的阈值矩阵。 在通过使用这些阈值矩阵创建半色调点图像时，这些颜色分量的半色调点图像的空间频率的特性可以在频率空间中表示为同心圆形区域（75K，75C）。 结果，可以产生具有较少颗粒度的多色半色调点图像，在这些半色调网点图像的空间频率的特性中没有彼此近似的部分。

公开(公告)号：US20050094212A1

公开(公告)日：2005-05-05

申请号：US10973446

申请日：2004-10-27

申请人： Hiroshi Asai ,  Yasuhiro Takemoto

发明人： Hiroshi Asai ,  Yasuhiro Takemoto

IPC分类号： B41J2/52 ,  G03F3/10 ,  G06T5/00 ,  H04N1/405 ,  H04N1/409

CPC分类号： H04N1/4055 ,  H04N1/405

摘要： Halftone cells each serving as a unit for formation of a dot are arranged in irregular shapes at random and divided into two groups. The halftone cells (720) in the first group are fewer than the halftone cells (730) in the second group and dispersed, and the area of each of the halftone cells (720) in the first group is set larger than that in the second group. The dot growth speed of the halftone cells (720) in the first group is higher than that of the halftone cells (730) in the second group. This allows formation of fine halftone dots consisting of the halftone cells in the first and second groups, and it is possible to reduce banding appearing in a main scan direction during recording of the halftone dots, with low-frequency components in spatial frequency of the halftone dots caused by the halftone cells (720) in the first group.

摘要翻译： 每个用作形成点的单元的半色调单元被随机布置成不规则形状并分成两组。 第一组中的半色调细胞（720）比第二组中的半色调细胞（730）少，并且分散，并且第一组中的每个半色调细胞（720）的面积被设定为大于第二组中的半色调细胞 组。 第一组中的半色调细胞（720）的点生长速度高于第二组中的半色调细胞（730）的点生长速度。 这允许形成由第一和第二组中的半色调细胞组成的细的半色调点，并且可以减少在半色调点记录期间在主扫描方向上出现的条纹，其中半色调的空间频率的低频分量 由第一组中的半色调细胞（720）引起的点。