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：EP1699225B1

公开(公告)日：2008-09-03

申请号：EP06004280.1

申请日：2006-03-02

申请人： Xerox Corporation

发明人： Fan, Zhigang

IPC分类号： H04N1/52

CPC分类号： H04N1/52

公开(公告)号：EP1725017A3

公开(公告)日：2008-06-04

申请号：EP06114081.0

申请日：2006-05-17

申请人： Xerox Corporation

发明人： Snyder, Trevor J. ,  Kroon, Stephen M. ,  Yao, Meng ,  Gordon, Michael C.

IPC分类号： H04N1/52

CPC分类号： H04N1/52

摘要： A method of processing cyan, magenta and yellow color values including half-toning cyan and magenta colors values, and half-toning yellow color values in such a manner that yellow dots tend to be printed next to cyan, magenta or secondary color dots regardless of cyan, magenta, or yellow coverages.

公开(公告)号：EP1912423A1

公开(公告)日：2008-04-16

申请号：EP06122100.8

申请日：2006-10-11

申请人： Hewlett-Packard Development Company, L.P.

发明人： Encrenaz, Michel ,  Lammens, Johan ,  Morovic, Jan

IPC分类号： H04N1/405 ,  H04N1/52 ,  H04N1/54

CPC分类号： H04N1/4052 ,  H04N1/52 ,  H04N1/54

摘要： A method is provided of reproducing continuous tone pixel colors of a color image having many pixels based on Kueppers' device states, wherein the Kueppers' device states of a printing device are the printed pixel colors that are allowed based on Kueppers' color separation and halftoning. The method includes selecting a Kueppers' device state in the proximity of a continuous tone pixel color to be reproduced from the printing device's set of Kueppers' device states, and printing the Kueppers' device state. An error is diffused between the continuous pixel color and the selected Kueppers' device state to one or more pixels in the neighborhood.

摘要翻译： 提供了一种基于Kueppers设备状态再现具有许多像素的彩色图像的连续色调像素颜色的方法，其中打印设备的Kueppers设备状态是基于Kueppers颜色分离和半色调允许的打印像素颜色 。 该方法包括从打印设备的Kueppers设备状态集合中选择要再现的连续色调像素颜色附近的Kueppers设备状态，并打印Kueppers设备状态。 连续像素颜色和所选的Kueppers设备状态之间的错误在附近的一个或多个像素上扩散。

公开(公告)号：EP1515539B1

公开(公告)日：2007-12-26

申请号：EP04028806.0

申请日：1997-08-04

申请人： Seiko Epson Corporation

发明人： Shimada, Kazumichi ,  Kakutani, Toshiaki

IPC分类号： H04N1/52 ,  B41J2/21

CPC分类号： B41J2/17553 ,  B41J2/17513 ,  B41J2/1752 ,  B41J2/2056 ,  H04N1/52

公开(公告)号：EP1705897A3

公开(公告)日：2007-10-03

申请号：EP06111383.3

申请日：2006-03-20

申请人： Xerox Corporation

发明人： Yao, Meng

IPC分类号： H04N1/52

CPC分类号： H04N1/6022 ,  H04N1/52

摘要： A method of printing a pixel defined by C1, M1, Y1, K1 color values having a sum that is not less than a predetermined maximum VMAX, including obtaining an adjusted cyan color value Cadj that depends on C1 and K1, an adjusted magenta color value Madj that depends on M1 and K1, and an adjusted yellow color value Yadj that respectively depends on Y1 and K1; assigning a maximum of the Cadj, Madj, Yadj values to max_color; assigning a minimum of the Cadj, Madj, Yadj values to min_color; selecting a black color value K that is not greater than a minimum of min_color and (Cadj+Madj+Yadj-VMAX+K1)/2; adding K1 to K to obtain a black output color value Kout; determining output non-black primary color values Cout, Mout, Yout and a secondary value S_color such that the sum of the black output color value Kout, the adjusted non-black primary color values Cout, Mout, Yout, and the secondary color value S_color is equal to the predetermined maximum value VMAX; and half-toning Kout, Cout, Mout, Yout, and S_color.

摘要翻译： 一种打印由具有不小于预定最大值VMAX的总和的C1，M1，Y1，K1色值定义的像素的方法，包括：获得依赖于C1和K1的调整后的青色值Cadj，调整后的品红色值 Madj取决于M1和K1，调整后的黄色值Yadj分别取决于Y1和K1; 将最大的Cadj，Madj，Yadj值分配给max_color; 为min_color指定最小的Cadj，Madj，Yadj值; 选择不大于min_color的最小值且（Cadj + Madj + Yadj-VMAX + K1）/ 2的黑色值K; 将K1加入K得到黑色输出色彩值Kout; 确定输出非黑色原色值Cout，Mout，Yout和次级值S_color，使得黑色输出色值Kout，调整后的非黑色原色值Cout，Mout，Yout和次色值S_color的总和 等于预定最大值VMAX; 和半色调Kout，Cout，Mout，Yout和S_color。

公开(公告)号：EP1242968A4

公开(公告)日：2007-09-12

申请号：EP00978914

申请日：2000-10-06

申请人： RASTERGRAPHICS INC

发明人： DERHAK MAXIM W

IPC分类号： H04N1/405 ,  H04N1/52

CPC分类号： H04N1/4057 ,  H04N1/4051

摘要： Provided are systems and methods for rendering a halftone image (110) on a medium. The original continuous tone image (100) is divided into a plurality of pixels (202) and each pixel is representative of an area of the original image. Each pixel may comprise a plurality of dots (203) and a level represents the number of dots to be placed within the pixel. Level also refers to an amount of ink which is placed on a medium. Each level is represented as a dot placement and potential dot placements are stored in a data structure (220). The data structure is large enough to hold the potential levels of one or more pixels. Thus, more than one pixel can be processed and rendered at the same time. The data structure is referenced by the levels of the pixel to be printed and the dot placement stored at the referenced level is output to the output device (50).

摘要翻译： 提供了用于在介质上渲染半色调图像（110）的系统和方法。 原始连续色调图像（100）被分成多个像素（202），并且每个像素代表原始图像的区域。 每个像素可以包括多个点（203），并且电平表示要放置在像素内的点的数量。 等级也指的是放置在介质上的墨水量。 每个级别被表示为点布局，并且潜在的点布置被存储在数据结构中（220）。 数据结构足够大以保持一个或多个像素的潜在水平。 因此，可以同时处理和渲染多个像素。 数据结构由要打印的像素的级别来引用，并且存储在参考级别处的点布局被输出到输出设备（50）。

公开(公告)号：EP1494458B1

公开(公告)日：2007-08-29

申请号：EP04015209.2

申请日：2004-06-29

申请人： Ricoh Company, Ltd.

发明人： Takahashi, Hiroshi, c/o Ricoh Company, Ltd. ,  Yamaguchi, Katsumi, c/o Ricoh Company, Ltd.

IPC分类号： H04N1/52

CPC分类号： H04N1/52

公开(公告)号：EP1743477A1

公开(公告)日：2007-01-17

申请号：EP05736247.7

申请日：2005-04-18

申请人： EASTMAN KODAK COMPANY

发明人： GUSEV, Dmitri Anatolyevich ,  TAI, Hwai-Tzuu

IPC分类号： H04N1/52 ,  H04N1/54

CPC分类号： H04N1/52 ,  H04N1/54

摘要： A method and apparatus for processing image data representing a color separation or mono-color image includes processing the color separation image data or mono-color image data in accordance with first and second or more halftone screen processings at different screen angles and obtaining results of the processings and combining the results of the processings to generate composite image data of the first and second or more halftone screen processings. The resulting print of the composite image data forms relatively pleasing rosettes or diamond structures in the particular color.

公开(公告)号：EP1422927A3

公开(公告)日：2007-01-17

申请号：EP03013054.6

申请日：2003-06-10

申请人： Hewlett-Packard Development Company, L.P.

发明人： Quintana, Jason

IPC分类号： H04N1/52

CPC分类号： H04N1/52

摘要： A method of one embodiment of the invention is disclosed that uses an error diffusion approach to determine to output a pixel for a color component of an image pixel. In response thereto the method outputs this pixel and spaces out the output of pixels for other color components of the image pixel.