公开(公告)号：US20090231629A1

公开(公告)日：2009-09-17

申请号：US12372913

申请日：2009-02-18

申请人： Hiroshi Asai

发明人： Hiroshi Asai

IPC分类号： H04N1/405

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 ((Pm2)+(Pm2)), 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： 作为通过覆盖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位于沿彼此正交的第一和第二波纹方向上的莫尔条纹间距Pm处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 （（Pm2）+（Pm2））的平方根的间距的方向，并且生成颜色分量的阈值矩阵，使得根据颜色分量的灰度级的增加，半色调点从每个点中心生长 的原始图像。 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：US07266232B2

公开(公告)日：2007-09-04

申请号：US10434105

申请日：2003-05-09

申请人： Hiroshi Asai ,  Yuichiro Hikida ,  Hiroyuki Onishi

发明人： Hiroshi Asai ,  Yuichiro Hikida ,  Hiroyuki Onishi

IPC分类号： G06K9/00

CPC分类号： G06T7/001 ,  G06K9/4647 ,  G06T2207/30141 ,  G06T2207/30148

摘要： An inspection apparatus (1) has an image pickup part (2) for performing an image pickup of a substrate (9), an operation part (4) to which an image signal is inputted from said image pickup part (2) and a computer (5), and the operation part (4) specifies an inspection image and a reference image from an object image acquired by the image pickup part (2). In the operation part (4), a region class to which each pixel of the specified inspection image belongs is specified on the basis of a corresponding pixel value of the reference image. In a comparator circuit of the operation part (4), a differential absolute value between each pixel of the inspection image and a corresponding pixel of the reference image is calculated and the differential absolute value is compared with a defect check threshold value in accordance with the specified region class, to perform defect check. The inspection apparatus (1) can thereby appropriately detect a defect in accordance with the region class to which each pixel belongs.

摘要翻译： 检查装置（1）具有用于进行基板（9）的图像拾取的图像拾取部分（2），从所述图像拾取部分（2）输入图像信号的操作部分（4）和计算机 （5），并且操作部分（4）从由图像拾取部分（2）获取的对象图像指定检查图像和参考图像。 在操作部分（4）中，基于参考图像的对应像素值来指定所指定的检查图像的每个像素所属的区域类别。 在操作部分（4）的比较器电路中，计算检查图像的每个像素与参考图像的相应像素之间的差分绝对值，并将差分绝对值与缺陷检查阈值进行比较 指定区域类，进行缺陷检查。 因此，检查装置（1）能够根据每个像素所属的区域类别适当地检测缺陷。

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：US06222980B1

公开(公告)日：2001-04-24

申请号：US09047374

申请日：1998-03-25

申请人： Hiroshi Asai ,  Masaki Ishiwata

发明人： Hiroshi Asai ,  Masaki Ishiwata

IPC分类号： H04N5782

CPC分类号： H04N5/765 ,  G11B27/002 ,  G11B27/024 ,  G11B27/028 ,  G11B27/323 ,  G11B2220/90

摘要： A direction detector operates for detecting a direction of feed of a recording tape. A timer operates for counting pulses of a clock signal, and outputting a signal representing a first count value. A second count value is generated which corresponds to a pulse width related to a first bit represented by an input time code signal reproduced from the recording tape. The first count value which occurs at a first time point and the second count value are added into a first addition-result value. An output time code signal is inverted when the first count value currently represented by the output signal of the timer comes equal to the first addition-result value. A second bit is selected from among bits represented by the input time code signal in response to the direction detected by the direction detector. The second bit to be selected neighbors the first bit in a normal time direction when the detected direction agrees with a forward direction. The second bit to be selected neighbors the first bit in a reverse time direction when the detected direction agrees with a reverse direction. A third count value is generated which corresponds to a pulse width related to the second bit. The first count value which occurs at a second time point after the first time point and the third count value are added into a second addition-result value. The first addition-result value is updated into the second addition-result value.

摘要翻译： 方向检测器用于检测记录带的进给方向。 定时器用于对时钟信号的脉冲进行计数，并输出表示第一计数值的信号。 产生与从由记录带再现的输入时间码信号表示的与第一位有关的脉冲宽度的第二计数值。 在第一时间点发生的第一计数值和第二计数值被添加到第一加法结果值中。 当由定时器的输出信号当前表示的第一计数值等于第一加法结果值时，输出时间码信号被反转。 响应于由方向检测器检测到的方向，从由输入时间码信号表示的位中选择第二位。 当检测到的方向与正向一致时，要选择的第二位在正常时间方向上与第一位相邻。 当检测到的方向与反向一致时，要选择的第二位在反向时间方向上与第一位相邻。 产生对应于与第二位相关的脉冲宽度的第三计数值。 在第一时间点之后的第二时间点发生的第一计数值和第三计数值被添加到第二加法结果值中。 第一个加法结果值被更新为第二个加法结果值。

公开(公告)号：US6072590A

公开(公告)日：2000-06-06

申请号：US864004

申请日：1997-05-27

申请人： Hiroshi Sano ,  Hiroshi Asai

发明人： Hiroshi Sano ,  Hiroshi Asai

IPC分类号： H04N1/405 ,  G06K15/02

CPC分类号： H04N1/4058

摘要： A halftone dot forming method of the invention uses a replicated unit area of prescribed configuration including N pieces of halftone dot areas, where N is an integer of at least 2. An image signal is compared with threshold values assigned to pixels in the replicated unit area to form the halftone dots. The threshold value distribution in the replicated unit area is determined so as to form halftone dots whose areas are substantially equal at an arbitrary halftone dot area rate and which interconnect substantially simultaneously when the halftone dot area rate is 50%.

摘要翻译： 本发明的半色调点形成方法使用包括N个半色调点区域的规定配置的复制单位区域，其中N是至少为2的整数。将图像信号与分配给复制单元区域中的像素的阈值进行比较 以形成半色调点。 确定复制单位区域中的阈值分布，以形成半色调点，其面积在任意半色调点面积率下基本相等，并且当半色调点面积率为50％时基本上同时进行互连。

公开(公告)号：US5340414A

公开(公告)日：1994-08-23

申请号：US973284

申请日：1992-11-09

申请人： Hiroshi Asai ,  Nobuhide Takeshige ,  Yasuo Uosaki ,  Masahiko Shibahara ,  Motofumi Omori ,  Shigenori Morimoto

发明人： Hiroshi Asai ,  Nobuhide Takeshige ,  Yasuo Uosaki ,  Masahiko Shibahara ,  Motofumi Omori ,  Shigenori Morimoto

IPC分类号： C22C38/00 ,  C22C38/26 ,  C22C38/32

CPC分类号： C22C38/32 ,  C22C38/26

摘要： A heat-resistant ferritic cast steel member composed of 0.05 to 0.25 wt % of C, 0.3 to 2.0 wt % of Si, 0.2 to 1.0 wt % of Mn, not more than 0.05 wt % of P, not more than 0.05 wt % of of S, 16 to 20 wt % of Cr, 0.5 to 1.5 wt % of Nb, 0.02 to 0.15 wt % of B and balance to 100 of Fe is cast in a lost model made of foamed polymethyl methacrylate.

摘要翻译： 由0.05〜0.25重量％的C，0.3〜2.0重量％的Si，0.2〜1.0重量％的Mn，0.05重量％以下的P，0.05重量％以下的耐热铁素体铸钢构成， 的S，16〜20重量％的Cr，0.5〜1.5重量％的Nb，0.02〜0.15重量％的B，余量为100的Fe铸造在由发泡聚甲基丙烯酸甲酯制成的损失模型中。

公开(公告)号：US08384959B2

公开(公告)日：2013-02-26

申请号：US13572261

申请日：2012-08-10

申请人： Hiroshi Asai

发明人： Hiroshi Asai

IPC分类号： G06K15/00 ,  H04N1/405

CPC分类号： H04N1/4051

摘要： In a matrix area, a plurality of linear areas each of which extends in a tilt direction tilted relatively to row and column directions are arranged in a direction perpendicular to the tilt direction without spaces, and the plurality of linear areas are alternatively assigned to first and second element groups along an arrangement direction. One element is specified in each element group, and subsequently a process of specifying an element farthest from the specified elements is repeated, to acquire a turn-on order of dots with increase in gray level in one grayscale range and a turn-off order of dots with decrease in gray level in the remaining grayscale range, and a threshold value of each element is determined according to these orders. Thus, generated is a threshold matrix capable of reducing graininess in a halftone image with directionality in the tilt direction, and improving the reproduction of thin lines and characters.

摘要翻译： 在矩阵区域中，在垂直于倾斜方向的方向上排列有多个沿倾斜方向相对于列和列方向倾斜的线性区域，并且多个线性区域被交替地分配给第一和第 第二元件组沿着排列方向。 在每个元素组中指定一个元素，并且随后重复指定距离指定元素最远的元素的处理，以在一个灰度范围内获得灰度级增加的点的点亮顺序，并且关闭顺序 在剩余灰度范围内灰度级降低的点，并且根据这些顺序确定每个元素的阈值。 因此，产生的阈值矩阵能够在倾斜方向上以方向性降低半色调图像的粒度，并且改善细线和字符的再现。

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：US20080074701A1

公开(公告)日：2008-03-27

申请号：US11902562

申请日：2007-09-24

申请人： Hiroshi Asai

发明人： Hiroshi Asai

IPC分类号： G06K15/00

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，将小区中心随机排列，青色的小区中心间隔最大的方向以及品红色的小区中心间隔的方向为 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。 通过头部对每个颜色分量的阈值矩阵记录检查图案，测量与检查图案的宽度方向上的位置的打印密度相对应的头部的出口的布置方向以获取修改系数，然后 通过使用修改系数修改原始图像的像素值。 这使得可以打印具有较少颗粒度的彩色半色调图像，而不会引起拍子图案和条纹不均匀。