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1. 发明授权

US06312101B1 Method of printing digital images using multiple colorants having substantially the same color 有权
标题翻译：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
申请人： Douglas W. Couwenhoven , Kevin E. Spaulding , Rodney L. Miller
发明人： Douglas W. Couwenhoven , Kevin E. Spaulding , Rodney L. Miller
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。

2. 发明授权

US5757517A Adaptive error diffusion method 失效
标题翻译：自适应误差扩散法
公开(公告)号：US5757517A
公开(公告)日：1998-05-26
申请号：US409554
申请日：1995-03-23
申请人： Douglas W. Couwenhoven , Kevin E. Spaulding , Rodney L. Miller
发明人： Douglas W. Couwenhoven , Kevin E. Spaulding , Rodney L. Miller
IPC分类号： G03G15/01 , G06F17/10 , G06T5/00 , H04N1/405 , H04N1/40
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。

3. 发明授权

US07190485B2 Method for multilevel printing of digital images using reduced colorant amounts 有权
标题翻译：使用减少的着色剂量对数字图像进行多层印刷的方法
公开(公告)号：US07190485B2
公开(公告)日：2007-03-13
申请号：US09881460
申请日：2001-06-14
申请人： Douglas W. Couwenhoven , Kevin E. Spaulding , Rodney L. Miller
发明人： Douglas W. Couwenhoven , Kevin E. Spaulding , Rodney L. Miller
IPC分类号： G06F15/00
CPC分类号： H04N1/52 , H04N1/6019
摘要： A method for modifying an input digital image having an (x, y) array of pixels, each pixel having an input code value for one or more color channels, wherein said input code value has a nonlinear relationship to colorant amount, to form an output digital image containing output code values for each pixel subject to a total colorant amount limit.
摘要翻译：一种用于修改具有（x，y）像素阵列的输入数字图像的方法，每个像素具有用于一个或多个颜色通道的输入代码值，其中所述输入代码值与着色剂量具有非线性关系，以形成输出数字图像包含受到着色剂总量限制的每个像素的输出代码值。

4. 发明授权

US06435657B1 Method for multicolorant printing of digital images using reduced colorant amounts 有权
标题翻译：使用着色剂量减少的多色印刷数字图像的方法
公开(公告)号：US06435657B1
公开(公告)日：2002-08-20
申请号：US09933498
申请日：2001-08-20
申请人： Douglas W. Couwenhoven , Rodney L. Miller , Kevin E. Spaulding
发明人： Douglas W. Couwenhoven , Rodney L. Miller , Kevin E. Spaulding
IPC分类号： B41J221
CPC分类号： B41J2/21 , B41J2/2056 , H04N1/52
摘要： A method for modifying an input image suitable for printing on a digital printer having two or more colorants, wherein at least two of the colorants are similar having substantially the same color but different densities, to form an output image with pixels representing modified colorant amounts subject to a total colorant amount limit.
摘要翻译：一种用于修改适于在具有两个或更多个着色剂的数字打印机上打印的输入图像的方法，其中至少两个着色剂具有基本上相同颜色但不同密度的相似颜色，以形成具有代表改性着色剂量对象的像素的输出图像达到总着色剂量极限。

5. 发明授权

US5553199A Method and apparatus for calibrating a four color printer 失效
标题翻译：用于校准四色打印机的方法和装置
公开(公告)号：US5553199A
公开(公告)日：1996-09-03
申请号：US237072
申请日：1994-05-03
申请人： Kevin E. Spaulding , Douglas W. Couwenhoven , Rodney L. Miller
发明人： Kevin E. Spaulding , Douglas W. Couwenhoven , Rodney L. Miller
IPC分类号： B41J2/525 , G03G15/01 , H04N1/46 , H04N1/60 , G06K15/00
CPC分类号： H04N1/6025
摘要： A method of calibrating a four color printer capable of printing three colors and black, includes the steps of: forming a minimum black data structure representing a minimum black strategy; forming a maximum black data structure representing a maximum black strategy; for each printable black level, forming a fixed black data structure; and for a specific output color value, finding the minimum and maximum black levels using the minimum and maximum black data structures, determining a desired black level between the minimum and maximum black levels according to a defined black strategy, and determining the three printing color levels from the fixed black data structure corresponding to the desired black level.
摘要翻译：一种校准能够打印三种颜色和黑色的四色打印机的方法包括以下步骤：形成代表最小黑色策略的最小黑色数据结构; 形成表示最大黑色策略的最大黑色数据结构; 对于每个可打印的黑色电平，形成固定的黑色数据结构; 并且对于特定输出颜色值，使用最小和最大黑色数据结构找到最小和最大黑色电平，根据定义的黑色策略确定最小和最大黑色电平之间的期望黑电平，以及确定三种打印色彩水平从对应于所需黑色电平的固定黑色数据结构。

6. 发明授权

US06407825B1 Colorant reduction method for digital images 失效
标题翻译：数字图像的着色剂还原方法
公开(公告)号：US06407825B1
公开(公告)日：2002-06-18
申请号：US09213637
申请日：1998-12-17
申请人： Douglas W. Couwenhoven , Kevin E. Spaulding , Rodney L. Miller
发明人： Douglas W. Couwenhoven , Kevin E. Spaulding , Rodney L. Miller
IPC分类号： G06F1500
CPC分类号： H04N1/52
摘要： A method for modifying an input image having an (x,y) array of input pixels, each pixel having an input colorant amount for one or more color channels to form an output image with output colorant amounts, said output image being suitable for printing on a digital printing device having two or more printing levels, including determining an average total pixel colorant amount in a neighborhood of an input pixel in the input image; determining a colorant reduction amount for each color channel of the input pixel responsive to the input colorant amount, the average total pixel colorant amount, and a threshold colorant amount; determining an output colorant amount for each color channel of the input pixel responsive to the colorant reduction amount, the input colorant amount, and a spatially periodic dither signal, so that the average output colorant amount in a neighborhood of each pixel in the output image is constrained to be less than the threshold colorant amount; and repeating steps a) through c) for each pixel in the input image.
摘要翻译：一种用于修改具有输入像素的（x，y）阵列的输入图像的方法，每个像素具有用于一个或多个颜色通道的输入着色剂量以形成具有输出着色剂量的输出图像，所述输出图像适于在具有两个或多个打印级别的数字打印装置，包括确定所述输入图像中的输入像素附近的平均总像素着色剂量; 响应于输入着色剂量，平均总像素着色剂量和阈值着色剂量，确定输入像素的每个颜色通道的着色剂减少量; 响应于着色剂还原量，输入着色剂量和空间周期性抖动信号，确定输入像素的每个颜色通道的输出着色剂量，使得输出图像中每个像素附近的平均输出着色剂量为被限制在小于阈值着色剂量; 并且对输入图像中的每个像素重复步骤a）至c）。

7. 发明授权

US5975671A Method and apparatus for printing an image on a device having multiple dot densities and multiple dot areas 失效
标题翻译：用于在具有多个点密度和多个点区域的设备上打印图像的方法和装置
公开(公告)号：US5975671A
公开(公告)日：1999-11-02
申请号：US657723
申请日：1996-05-30
申请人： Kevin E. Spaulding , Douglas W. Couwenhoven , Rodney L. Miller
发明人： Kevin E. Spaulding , Douglas W. Couwenhoven , Rodney L. Miller
IPC分类号： H04N1/409 , H04N1/52 , B41J2/205
CPC分类号： H04N1/409 , H04N1/52
摘要： A method for processing a digitized continuous tone image so that such processed image is adapted to be applied to an image rendering device which prints dots from a set of two or more possible dot-areas and from a set of colorants having different colorant concentrations is disclosed. The method includes selecting a set of N dot-area and colorant concentration combinations, each of said combinations producing a different integrated optical density value and multilevel halftone processing the digitized continuous tone image to produce an output image having a set of output levels wherein one member of the set of N dot-area and colorant concentration combinations is associated with each of the possible output levels.
摘要翻译：一种用于处理数字化连续色调图像的方法，使得这种处理后的图像适于应用于从一组两个或更多个可能的点区域和从具有不同着色剂浓度的一组着色剂中打印点的图像渲染装置。该方法包括选择一组N个点区域和着色剂浓度组合，每个所述组合产生不同的积分光密度值，并且多级半色调处理数字化连续色调图像以产生具有一组输出电平的输出图像，其中一个成员的N个点区域和着色剂浓度组合的组合与每个可能的输出水平相关联。

8. 发明申请

US20110211229A1 COLOR ERROR DIFFUSION WITH ERROR SIGNAL OFFSET 有权
标题翻译：带有错误信号偏移的颜色错误扩散
公开(公告)号：US20110211229A1
公开(公告)日：2011-09-01
申请号：US13105063
申请日：2011-05-11
申请人： Kevin E. Spaulding , Douglas W. Couwenhoven
发明人： Kevin E. Spaulding , Douglas W. Couwenhoven
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。

9. 发明申请

US20100141970A1 DIGITAL PRINTING USING SIMILAR COLORANTS 有权
标题翻译：使用类似颜色的数字打印
公开(公告)号：US20100141970A1
公开(公告)日：2010-06-10
申请号：US12330552
申请日：2008-12-09
申请人： Douglas W. Couwenhoven , Kevin E. Spaulding
发明人： Douglas W. Couwenhoven , Kevin E. Spaulding
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。

10. 发明授权

US6011595A Method for segmenting a digital image into a foreground region and a key color region 失效
标题翻译：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
申请人： Todd R. Henderson , Kevin E. Spaulding , Douglas W. Couwenhoven
发明人： Todd R. Henderson , Kevin E. Spaulding , Douglas W. Couwenhoven
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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