公开(公告)号：EP2645696A3

公开(公告)日：2014-11-26

申请号：EP13153071.9

申请日：2013-01-29

申请人： Dainippon Screen Mfg. Co., Ltd.

发明人： Takahama, Ikuhiko ,  Asai, Hiroshi

IPC分类号： H04N1/405 ,  H04N1/52

CPC分类号： B41J2/2121 ,  H04N1/4051 ,  H04N1/52

摘要： A threshold matrix generation part determines a turn-on order in a matrix area where a threshold matrix is generated and determines a threshold value of each matrix element. In determining the turn-on order, a temporary evaluation value element is obtained based on a distance between each undetermined matrix element whose position in the turn-on order has not been determined and each determined matrix element. If these matrix elements are located in the same position with respect to a row or column direction, the temporary evaluation value element is corrected such that the undetermined matrix element is less evaluated based on the evaluation value. Then, the position of an undetermined matrix element that is most highly evaluated in the turn-on order is determined. Accordingly, a threshold matrix that suppresses the occurrence of a grid-like dot pattern can be provided.

公开(公告)号：EP2111033A1

公开(公告)日：2009-10-21

申请号：EP09003401.8

申请日：2009-03-09

申请人： Dainippon Screen Mfg., Co., Ltd.

发明人： Asai, Hiroshi ,  Kurokawa, Yuji ,  Wakui, Masaru

IPC分类号： H04N1/405 ,  B41M1/04

CPC分类号： H04N1/4057

摘要： In a halftone image formed on a printing plate for letterpress printing, a minimum halftone dot has a square main cluster consisting of 9 pixels and four sub-clusters located around the main cluster radially, each of which is one pixel. Each sub-cluster contacts with only a vertex of the main cluster. Convex portions corresponding to the minimum halftone dots in the halftone image are formed on the printing plate. A convex portion corresponding to the main cluster is supported by convex portions corresponding to the sub-clusters to increase the strength of relief corresponding to the minimum halftone dot. Reliefs corresponding to the minimum halftone dots are normally formed regardless of a dot area rate of highlight area to thereby improve reproduction in printing of the halftone image.

摘要翻译： 在用于凸版印刷的印刷版上形成的半色调图像中，最小网点具有由9个像素和位于主要群集周围的四个子群构成的方形主群，其中每个群是一个像素。 每个子集群仅与主集群的顶点联系。 在印版上形成对应于半色调图像中的最小网点的凸部。 对应于主簇的凸起部分由与子簇对应的凸起部分支撑，以增加对应于最小网点的凸起的强度。 通常形成与最小网点相对应的浮雕，而与高亮区域的网点面积率无关，从而改善半色调图像的打印再现。

公开(公告)号：EP2101482A1

公开(公告)日：2009-09-16

申请号：EP09002044.7

申请日：2009-02-13

申请人： Dainippon Screen Mfg. Co., Ltd.

发明人： Asai, Hiroshi

IPC分类号： H04N1/52

CPC分类号： H04N1/52

摘要： Each of moire elements which are repeat elements of first-order moire appearing by overlaying halftone images of first and second color components is positioned at one of candidate positions arranged at a moire pitch Pm in first and second moire directions orthogonal to each other. In a matrix area of a third color component, dot centers are arranged in a first tilt direction tilted relatively to the first moire direction by an angle of arctan((Pm)/(Pm)) and a second tilt direction orthogonal to the first tilt direction at a pitch of the square root of ((Pm 2 )+(Pm 2 )), and a threshold matrix of the color component is generated so that a halftone dot grows from each dot center in accordance with increase of gray level of the color component of the original image. Thus, it is possible to suppress second-order moire appearing in overlaying halftone images of the first to third color components.

摘要翻译： 作为通过重叠第一和第二颜色分量的半色调图像而出现的一阶莫尔值的重复元素的莫尔元件中的每一个被定位在彼此正交的第一和第二云纹方向上以莫尔条纹间距Pm布置的候选位置之一处。 在第三颜色分量的矩阵区域中，点中心以相对于第一莫尔方向倾斜Arctan（（Pm）/（Pm））的角度的第一倾斜方向和与第一倾斜垂直的第二倾斜方向 （（Pm 2）+（Pm 2））的平方根的间距的方向，并且生成颜色分量的阈值矩阵，使得半色调点从每个点中心增长，根据 原始图像的颜色分量。 因此，可以抑制出现在第一至第三颜色分量的重叠半色调图像中的二阶莫尔条纹。

公开(公告)号：EP1906647A2

公开(公告)日：2008-04-02

申请号：EP07116917.1

申请日：2007-09-21

申请人： Dainippon Screen Mfg., Co., Ltd.

发明人： Asai, Hiroshi

IPC分类号： H04N1/405

CPC分类号： H04N1/4055 ,  H04N1/52

摘要： In a printer, threshold matrixes are prepared so that, in a color halftone image generated with the threshold matrixes, cell centers are arranged randomly, a direction where intervals of cell centers for cyan are maximum and a direction where intervals of cell centers for magenta are maximum are different, and the both directions are tilted relatively to a column direction corresponding to a scan direction of a head. A check pattern is recorded with the threshold matrix for each color component by the head, print densities in positions in a width direction of the check pattern, which corresponds to an arrangement direction of outlets in the head, are measured to acquire modification coefficients and then pixel values of an original image are modified by using the modification coefficients. This makes it possible to print a color halftone image with less graininess, without causing a beat pattern and streak unevenness.

摘要翻译： 在打印机中，准备阈值矩阵，使得在用阈值矩阵生成的彩色半色调图像中随机排列单元中心，青色的单元中心的间隔最大的方向以及品红色的单元中心的间隔是 最大值不同，并且两个方向相对于与头部的扫描方向对应的列方向倾斜。 用头对每种颜色成分的阈值矩阵记录检验图案，测量对应于头中出口的排列方向的检验图案在宽度方向上的位置的印刷密度以获得修改系数，然后 通过使用修改系数来修改原始图像的像素值。 这使得可以印刷具有较少颗粒度的彩色半色调图像，而不会产生节拍图案和条纹不均匀。

公开(公告)号：EP2785040A1

公开(公告)日：2014-10-01

申请号：EP14153842.1

申请日：2014-02-04

申请人： Dainippon Screen Mfg. Co., Ltd.

发明人： Takahama, Ikuhiko ,  Asai, Hiroshi ,  Ichioka, Yoshikazu

IPC分类号： H04N1/405

CPC分类号： G06K15/1881 ,  G06K15/102 ,  H04N1/4051

摘要： An image obtained by shrinking an original image in a row direction is halftoned, and this halftone dot image is enlarged in the row direction and recorded at double speed. In order to determine a threshold value of a threshold matrix used for halftoning an image, prepared is a matrix space in accordance with writing positions used for actual recording of an image. In the matrix space, writing elements are set alternately with non-writing elements both in the row direction and in a column direction. In the matrix space, turn-on numbers are allocated to all the writing elements in avoidance of the non-writing elements. Then, in accordance with the turn-on numbers, respective threshold values for the writing elements are determined. By shrinking the threshold matrix in the row direction with omission of the non-writing elements, a threshold matrix for double speed is obtained.

摘要翻译： 通过按照行的方向收缩到原始图像而获得的图像被半色调，并且该半色调点的图像被放大的行方向和以两倍速记录。 为了确定矿用于半色调图像的阈值矩阵的阈值，制备是在舞蹈雅的矩阵空间与用于图像的实际记录描画位置。 在基体中的空间，写入元件与两个在行方向和列方向非写入元件交替设定。 在矩阵空间，出现编号分配给在回避非描画要素的所有文字元素。 然后，在与出现编号雅舞蹈，为书写元件respectivement的阈值是确定的开采。 通过在与非写入元件的遗漏的行方向上的阈值矩阵缩小，以双倍的速度的阈值矩阵被获得。

公开(公告)号：EP2233302A3

公开(公告)日：2013-10-16

申请号：EP10156675.0

申请日：2010-03-16

申请人： Dainippon Screen Mfg. Co., Ltd.

发明人： Asai, Hiroshi

IPC分类号： B41J2/21 ,  B41J2/205

CPC分类号： B41J2/2128 ,  B41J2/2054 ,  H04N1/40087 ,  H04N1/6072

摘要： The low and high occupancy rate matrix sets (81,82) are stored in the inkjet printer which performs printing with dots having different sizes. For the original image where banding unevenness easily appears, used is the low occupancy rate matrix set (81) where the occupancy rate of all dots is lower than 100 % in the maximum value of gray level and the proportion of the large dots is high in a high range of gray level. For the original image where reproducibility of details is required, used is the high occupancy rate matrix set (82) where the occupancy rate of all dots becomes 100 % in a value of gray level lower than the maximum value of gray level and the proportion of the small dots is high in a middle range of gray level. It is therefore possible to perform appropriate printing in accordance with the classification of the original image.

公开(公告)号：EP2520433A1

公开(公告)日：2012-11-07

申请号：EP11193616.7

申请日：2011-12-14

申请人： Dainippon Screen Mfg. Co., Ltd.

发明人： Asai, Hiroshi

IPC分类号： B41J2/205 ,  B41J2/21

CPC分类号： B41J2/2056 ,  B41J2/2128 ,  B41J2/2139 ,  B41J2/2146 ,  G06K15/1881 ,  H04N1/52

摘要： An image recording apparatus (1) has low intensity ink ejection parts (211a) for ejecting low intensity ink, and a high intensity ink ejection part (211b) for ejecting high intensity ink. With respect to a direction orthogonal to a moving direction of printing paper (9), a pitch (P2) of outlets in the high intensity ink ejection part (211b) is larger than that (P1) in the low intensity ink ejection part (211a). Thus, manufacturing cost of the apparatus is reduced. With respect to each gray level in a middle grayscale range, if a tint image (521-526, 531-533) is recorded with the high intensity ink, a spatial frequency of this tint image is lower than that of a tint image (511-516) recorded with the low intensity ink. By the above image recording control, even if the high intensity ink ejection part includes an abnormal outlet where a flight direction of droplet is abnormal, streak unevenness in a color halftone image can be suppressed.

摘要翻译： 图像记录装置（1）具有用于喷射低强度油墨的低强度喷墨部分（211a）和用于喷射高强度油墨的高强度喷墨部分（211b）。 相对于与打印纸（9）的移动方向正交的方向，高强度墨水喷射部（211b）中的出口的间距（P2）大于低强度墨水喷射部（211a）中的（P1） ）。 因此，装置的制造成本降低。 对于中间灰度范围内的每个灰度级，如果用高强度墨水记录着色图像（521-526,531-533），则该色调图像的空间频率低于色调图像的空间频率（511 -516）用低强度墨水记录。 通过上述图像记录控制，即使高强度喷墨部分包括液滴的飞行方向异常的异常出口，也可以抑制彩色半色调图像中的条纹不均匀。

公开(公告)号：EP1906647A3

公开(公告)日：2008-09-24

申请号：EP07116917.1

申请日：2007-09-21

申请人： Dainippon Screen Mfg., Co., Ltd.

发明人： Asai, Hiroshi

IPC分类号： H04N1/405 ,  H04N1/52

CPC分类号： H04N1/4055 ,  H04N1/52

摘要： In a printer, threshold matrixes are prepared so that, in a color halftone image generated with the threshold matrixes, cell centers are arranged randomly, a direction where intervals of cell centers for cyan are maximum and a direction where intervals of cell centers for magenta are maximum are different, and the both directions are tilted relatively to a column direction corresponding to a scan direction of a head. A check pattern is recorded with the threshold matrix for each color component by the head, print densities in positions in a width direction of the check pattern, which corresponds to an arrangement direction of outlets in the head, are measured to acquire modification coefficients and then pixel values of an original image are modified by using the modification coefficients. This makes it possible to print a color halftone image with less graininess, without causing a beat pattern and streak unevenness.

公开(公告)号：EP2677731A2

公开(公告)日：2013-12-25

申请号：EP13170349.8

申请日：2013-06-04

申请人： Dainippon Screen Mfg. Co., Ltd.

发明人： Asai, Hiroshi

IPC分类号： H04N1/52 ,  H04N1/405

CPC分类号： G06K15/1881 ,  H04N1/4055 ,  H04N1/52

摘要： An image recording apparatus generates black, cyan, magenta, and yellow halftone image data from a multi-tone color image. When the cyan halftone image data is generated, the size of a cyan dot to be formed at a target pixel position is provisionally determined and added to the size of a black dot to obtain a total dot size. When the total dot size is less than or equal to a first threshold dot size, the cyan dot size is determined to be the provisionally determined size, and when the total dot size is greater than the first threshold dot size, the cyan dot size is determined to be the largest dot size within the range of a difference between the first threshold dot size and the black dot size. It is possible to prevent excessive overlapping of black and cyan dots.

摘要翻译： 一种图像记录设备基因率黑色，青色，品红色，和从多色调的彩色图像的黄色半色调图像数据。 当产生青色半色调图像数据，青色点的大小以在目标像素位置被临时确定的开采来形成，并加入到一个黑点的大小，以获得总的点大小。 当总的点大小小于或等于第一阈值的点尺寸，青色点尺寸是确定的开采是暂时确定的开采大小，并且当总的点大小大于第一阈值点尺寸越大，青色点尺寸是 确定性开采是所述第一阈值的点尺寸和黑点的大小之间的差的范围内的大最大点尺寸。 它能够防止黑色和青色点的过度重叠。

公开(公告)号：EP2645696A2

公开(公告)日：2013-10-02

申请号：EP13153071.9

申请日：2013-01-29

申请人： Dainippon Screen Mfg. Co., Ltd.

发明人： Takahama, Ikuhiko ,  Asai, Hiroshi

IPC分类号： H04N1/405 ,  H04N1/52

CPC分类号： B41J2/2121 ,  H04N1/4051 ,  H04N1/52

摘要： A threshold matrix generation part determines a turn-on order in a matrix area where a threshold matrix is generated and determines a threshold value of each matrix element. In determining the turn-on order, a temporary evaluation value element is obtained based on a distance between each undetermined matrix element whose position in the turn-on order has not been determined and each determined matrix element. If these matrix elements are located in the same position with respect to a row or column direction, the temporary evaluation value element is corrected such that the undetermined matrix element is less evaluated based on the evaluation value. Then, the position of an undetermined matrix element that is most highly evaluated in the turn-on order is determined. Accordingly, a threshold matrix that suppresses the occurrence of a grid-like dot pattern can be provided.

摘要翻译： 阈值矩阵生成部确定生成阈值矩阵的矩阵区域中的点亮顺序，并且确定每个矩阵元素的阈值。 在确定点亮顺序时，基于未确定点亮顺序中的位置的每个未确定矩阵元素与每个确定的矩阵元素之间的距离获得临时评估值元素。 如果这些矩阵元素相对于行或列方向位于相同的位置，则校正临时评估值元素，使得基于评估值对未确定的矩阵元素进行较少的评估。 然后，确定在点亮顺序中最高评价的未确定矩阵元素的位置。 因此，可以提供抑制网格状点阵图案的发生的阈值矩阵。