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公开(公告)号：US20110211229A1
公开(公告)日：2011-09-01
申请号：US13105063
申请日：2011-05-11
IPC分类号： H04N1/405
CPC分类号： H04N1/52
摘要： A method for multi-toning an input digital image having input pixels with two or more color channels to form an output digital image having modified output levels. The method includes determining modified output levels using a combined error signal formed from intermediate error signals for each color channel together with an error signal offset value, and adjusting the input levels for the nearby pixels responsive to weighted error signals.
摘要翻译： 一种用于多输入具有两个或多个颜色通道的输入像素的输入数字图像以形成具有修改的输出电平的输出数字图像的方法。 该方法包括使用由每个颜色通道的中间误差信号形成的组合误差信号以及误差信号偏移值来确定修正的输出电平，以及响应于加权误差信号调整附近像素的输入电平。
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公开(公告)号：US20100141970A1
公开(公告)日：2010-06-10
申请号：US12330552
申请日：2008-12-09
IPC分类号： H04N1/60
CPC分类号： H04N1/60
摘要： A method for printing an input digital image using a digital printer having a set of colorants with substantially the same color but different densities, including a sequence of node points where each of the two or more colorants are either at their maximum or minimum values, setting colorant concentrations such that the color channel output responses corresponding to the sequence of node points are substantially equally spaced in a visually uniform color space; forming colorant control look-up tables to provide smooth transitions in the color channel output response between the sequence of node points; addressing the colorant control look-up tables with the printer code value for each pixel of the input digital image to determine the colorant control signals for each of the two or more colorants; and controlling the digital printer using the colorant control signals to produce a print of the input digital image.
摘要翻译： 一种使用具有基本上相同颜色但不同密度的一组着色剂的数字打印机打印输入数字图像的方法，包括其中两个或更多个着色剂中的每一个处于其最大值或最小值的节点点序列，设置 着色剂浓度使得对应于节点点序列的颜色通道输出响应在视觉均匀的颜色空间中基本相等间隔; 形成着色剂控制查找表，以在节点间序列中的颜色通道输出响应中提供平滑过渡; 使用输入数字图像的每个像素的打印机代码值寻址着色剂控制查找表，以确定两种或更多种着色剂中的每一种的着色剂控制信号; 以及使用着色剂控制信号来控制数字打印机以产生输入数字图像的打印。
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3.发明授权Method of printing digital images using multiple colorants having substantially the same color 有权使用具有基本上相同颜色的多个着色剂打印数字图像的方法公开(公告)号：US06312101B1
公开(公告)日：2001-11-06
申请号：US09455981
申请日：1999-12-06
IPC分类号： B41J221
CPC分类号： H04N1/40087
摘要： A method for reproducing digital images having at least one color channel containing pixels using a digital printer having a set of colorants is disclosed. Two or more of the colorants of the set have substantially the same color but different densities. Printer code values for a particular color channel are used to control colorant amounts for the two or more colorants.
摘要翻译： 公开了一种使用具有一组着色剂的数字打印机再现具有至少一个包含像素的彩色通道的数字图像的方法。 组合物中的两种或更多种着色剂具有基本相同的颜色但不同的密度。 用于特定颜色通道的打印机代码值用于控制两种或更多种着色剂的着色剂量。
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4.发明授权Method for segmenting a digital image into a foreground region and a key color region 失效将数字图像分割成前景区域和键颜色区域的方法
公开(公告)号：US6011595A
公开(公告)日：2000-01-04
申请号：US934373
申请日：1997-09-19
IPC分类号： H04N9/75
CPC分类号： H04N9/75
摘要： A method for segmenting a digital image into a foreground region and a key color region including characterizing a distribution of key color values; using the distribution of key color values to produce a multi-dimensional look-up-table having three or more dimensions indexed by color values in a selected color space to define a key color volume; addressing the multi-dimensional look-up table with color values of pixels in the digital image to determine whether the color values of such pixels are within the key color volume; and labeling pixels in the digital image whose color values fall within the key color volume to be within the key color region and labeling all other pixels to be within the foreground region whereby the digital image is segmented into the foreground region and the key color region.
摘要翻译： 一种用于将数字图像分割成前景区域和键颜色区域的方法，包括表征键颜色值的分布; 使用键颜色值的分布来产生具有由所选颜色空间中的颜色值索引的三维或更多维度的多维查找表，以定义键颜色体积; 用数字图像中的像素的颜色值寻址多维查找表，以确定这些像素的颜色值是否在关键颜色体积内; 并且将其颜色值落在键颜色体积内的数字图像中的像素标记为在关键颜色区域内，并将所有其他像素标记在前景区域内，由此数字图像被分割成前景区域和键颜色区域。
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公开(公告)号：US08422082B2
公开(公告)日：2013-04-16
申请号：US12507226
申请日：2009-07-22
IPC分类号： H04N1/407
CPC分类号： H04N1/6022
摘要： A method for modifying an input digital image having three color channels, to form a modified digital image suitable for use by an inkjet printer having reduced ink bleed artifacts comprising computing a transformed digital image containing at least a black color channel and a color dependent scale factor channel, computing a filtered black color channel using a convolution operation, and forming the modified digital image in response to the corresponding pixel values of the color dependent scale factor channel and the filtered black color channel, so that when the modified digital image is used to produce a printed image on an inkjet printer there are reduced ink bleed artifacts.
摘要翻译： 一种用于修改具有三个颜色通道的输入数字图像的方法，以形成适于由具有减少的墨水泄漏伪影的喷墨打印机使用的修改的数字图像，包括计算至少包含黑色通道和颜色依赖比例因子的变换数字图像 使用卷积运算来计算滤波后的黑色频道，以及响应于色彩依赖比例因子信道和滤波黑色频道的相应像素值形成修改后的数字图像，使得当修改后的数字图像被用于 在喷墨打印机上产生印刷图像有减少的渗墨伪影。
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公开(公告)号：US08018623B2
公开(公告)日：2011-09-13
申请号：US12040055
申请日：2008-02-29
IPC分类号： G06K15/00
CPC分类号： H04N1/40087 , H04N1/4053
摘要： A method for multi-level error diffusion halftoning an input digital image to form an output digital image with reduced error diffusion texture contouring artifacts which includes modifying the input pixel values for a fraction of the input pixels using a periodic dither signal, where the fraction is a function of the texture artifact characteristics of the multi-level error diffusion halftoning process.
摘要翻译： 一种用于多级误差扩散的方法，用于对输入数字图像进行半色调以形成具有减小的误差扩散纹理轮廓伪迹的输出数字图像，其包括使用周期性抖动信号修改输入像素的一部分输入像素值，其中分数为 多级错误扩散半色调处理的纹理伪影特征的函数。
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公开(公告)号：US5986771A
公开(公告)日：1999-11-16
申请号：US934372
申请日：1997-09-19
CPC分类号： H04N1/62
摘要： A method for determining a control signal for use in combining a first digital image that includes both a foreground region and a key color region having an associated key color with a second background digital image, both images including pixels having color values is disclosed. The method includes segmenting the first digital image into a foreground region and a key color region; and identifying transition region pixels in the first digital image that are in the vicinity of a boundary between the segmented foreground region and the segmented key color region. The method further includes computing a color difference signal between the color values of the first digital image and the key color for at least some pixels in the transition region; and computing a control signal for transition region pixels as a function of the color difference signal, where the control signal is to be used to combine the foreground region of the first digital image with the second background digital image.
摘要翻译： 公开了一种用于确定控制信号的方法，用于将包括前景区域和具有相关联的键颜色的键颜色区域的第一数字图像与第二背景数字图像组合在一起，包括具有颜色值的像素的两个图像。 该方法包括将第一数字图像分割成前景区域和键颜色区域; 以及识别在所述第一数字图像中处于所述分割的前景区域和所述分割的键颜色区域之间的边界附近的过渡区域像素。 该方法还包括计算过渡区域中的至少一些像素的第一数字图像的颜色值和键颜色之间的色差信号; 以及计算作为所述色差信号的函数的过渡区域像素的控制信号，其中所述控制信号将用于将所述第一数字图像的前景区域与所述第二背景数字图像组合。
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8.发明授权Combining a first digital image and a second background digital image using a key color control signal and a spatial control signal 失效使用键颜色控制信号和空间控制信号组合第一数字图像和第二背景数字图像
公开(公告)号：US5937104A
公开(公告)日：1999-08-10
申请号：US934178
申请日：1997-09-19
IPC分类号： G06T13/00 , H04N9/75 , G06K15/316
CPC分类号： H04N9/75
摘要： A method for combining a first digital image and a second background digital image, both images including pixels having color values, wherein the first digital image includes both a foreground region having foreground color values and a key color region characterized by a key color, as well as a mixed region where the pixel color values are a mixture of the foreground color value and the key color, includes determining a first control signal that indicates the relative proportions of the foreground color value and the key color for pixels in the first digital image; and segmenting the first digital image into a key color region and a non-key color region in which the non-key color region includes pixels in the first digital image that are not in the key color region. The method also includes determining a second control signal that indicates a spatial distance between the pixels in the first digital image and a boundary between the key color region and the non-key color region; and combining the first digital image and the second background digital image in response to the first and second control signals, the key color, and an illuminant color value.
摘要翻译： 一种用于组合第一数字图像和第二背景数字图像的方法，包括具有颜色值的像素的两个图像，其中所述第一数字图像包括具有前景色值的前景区域和由键颜色表征的键颜色区域 作为像素颜色值是前景颜色值和键颜色的混合的混合区域，包括确定表示第一数字图像中的像素的前景色值和键颜色的相对比例的第一控制信号; 以及将所述第一数字图像分割成其中所述非键颜色区域包括所述第一数字图像中不在所述键颜色区域中的像素的键颜色区域和非键颜色区域。 该方法还包括确定指示第一数字图像中的像素与键颜色区域和非键颜色区域之间的边界之间的空间距离的第二控制信号; 以及响应于第一和第二控制信号，键颜色和光源颜色值来组合第一数字图像和第二背景数字图像。
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公开(公告)号：US5757517A
公开(公告)日：1998-05-26
申请号：US409554
申请日：1995-03-23
CPC分类号： H04N1/4052 , H04N1/4053
摘要： An error diffusion method suitable for producing an output image from an input image having a set of digitized continuous-tone pixels is disclosed. The method includes the steps of computing an image activity signal; computing a set of activity weights from the image activity signal; computing a filtered input value for a digitized continuous-tone input pixel responsive to the activity weights and computing a filtered output value responsive to the activity weights for each of the possible output levels. The method further includes selecting the output level in response to the filtered input value and the filtered output value for each of the possible output levels according to an error criterion; determining an error signal between the filtered input value and the filtered output value for the selected output level; and weighting the error signal and adjusting the filtered input values for nearby pixels which have not yet been processed.
摘要翻译： 公开了一种适用于从具有一组数字化连续色调像素的输入图像产生输出图像的误差扩散方法。 该方法包括计算图像活动信号的步骤; 从图像活动信号计算一组活动权重; 响应于活动权重计算数字化连续色调输入像素的滤波输入值，并响应于每个可能输出电平的活动权重计算滤波后的输出值。 该方法还包括根据误差准则，响应于滤波后的输入值和每个可能输出电平的滤波输出值来选择输出电平; 确定经滤波的输入值和所选输出电平的滤波输出值之间的误差信号; 并对误差信号进行加权，并调整尚未处理的附近像素的滤波输入值。
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公开(公告)号：US08272710B2
公开(公告)日：2012-09-25
申请号：US12174061
申请日：2008-07-16
IPC分类号： B41J2/205
CPC分类号： B41J19/142 , G06K15/107
摘要： A method for reducing banding artifacts for bi-directional multi-pass printing on an inkjet printer utilizing a printhead with a plurality of ink nozzles includes defining different print masks to be used for leftward and rightward printing passes such that both the order of ink laydown and the timing between ink laydown on different passes are each substantially constant for a given horizontal position within the image, independent of the vertical position within the image; and printing an input image on the inkjet printer with the defined print masks using a bi-directional multi-pass print mode.
摘要翻译： 一种利用具有多个墨水喷嘴的打印头在喷墨打印机上减少用于双向多次打印的条纹伪影的方法包括限定用于向左和向右打印通过的不同打印掩模，使得墨水沉积和 与图像内的垂直位置无关，图像中给定水平位置的不同通道之间的墨水沉积之间的时间大致恒定; 以及使用双向多遍打印模式使用所定义的打印掩模在喷墨打印机上打印输入图像。
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