公开(公告)号：US5636290A

公开(公告)日：1997-06-03

申请号：US667883

申请日：1996-06-20

申请人： Shinji Kita ,  Hitoshi Ogatsu ,  Kazumasa Murai

发明人： Shinji Kita ,  Hitoshi Ogatsu ,  Kazumasa Murai

IPC分类号： H04N1/60 ,  G06T1/00 ,  G06T11/00 ,  H04N1/46 ,  G06K9/00

CPC分类号： G06T11/001

摘要： A first nonlinear conversion section converts input color signals of a kind that is one of plural, different kinds to L*a*b* signals. A second nonlinear conversion section converts the L*a*b* signals to image recording signals of four colors including black. The first nonlinear conversion section includes an input judgment device for judging the kind of input color signals, a weight memory for storing weights for the respective kinds of color signals, and a nonlinear conversion circuit. The weights corresponding to the kind of input color signals identified by the input judgment device are read from the weight memory and set in the nonlinear conversion circuit. The first nonlinear conversion section further has a learning device to accommodate color signals whose conversion relationship with the L*a*b* signals has not been defined.

摘要翻译： 第一非线性转换部分将作为多种不同种类之一的输入颜色信号转换为L * a * b *信号。 第二非线性转换部分将L * a * b *信号转换成包括黑色的四种颜色的图像记录信号。 第一非线性转换部分包括用于判断输入颜色信号的种类的输入判断装置，用于存储各种颜色信号的权重的权重存储器和非线性转换电路。 对应于由输入判断装置识别的输入彩色信号种类的权重从权重存储器中读出并设置在非线性转换电路中。 第一非线性转换部分还具有用于容纳与L * a * b *信号的转换关系未定义的色彩信号的学习装置。

公开(公告)号：US5729360A

公开(公告)日：1998-03-17

申请号：US371982

申请日：1995-01-13

申请人： Shinji Kita ,  Hitoshi Ogatsu ,  Noriyuki Kazama ,  Kazumasa Murai ,  Yuzuru Suzuki

发明人： Shinji Kita ,  Hitoshi Ogatsu ,  Noriyuki Kazama ,  Kazumasa Murai ,  Yuzuru Suzuki

IPC分类号： H04N1/58 ,  H04N1/60 ,  H04N1/46

CPC分类号： H04N1/6022 ,  H04N1/58

摘要： A color image processing system for generating recorder image signals of four colors containing India ink from three color signals, the color image processing system includes a converter for converting three color signals into separated brightness and chromaticity signals; a range converter for converting the brightness signal into a range converted brightness signal which is within a record color reproduction range; an edge detector for obtaining an edge amount signal from the range converted brightness signal; a chroma detector for detecting chroma of an image signal from the chromaticity signal; an edge enhancer for enhancing an edge part of an image represented by the range converted brightness signal; a smoothing circuit for smoothing the range converted brightness signal; a brightness and chromaticity converter which includes a converter for executing brightness conversion by mixing an output of the edge enhancer and an output of the smoothing circuit according to the edge amount signal detected by the edge detector and a converter for executing chromaticity conversion for providing a chromaticity signal corresponding to compression/expansion of the chroma according to an output of the edge detector and an output of the chroma detector; and a record color converter for generating recorder image signals of four colors containing India ink according to an output of the brightness and chromaticity converter using a color conversion table.

摘要翻译： 一种彩色图像处理系统，用于从三个颜色信号产生含有印度墨水的四种颜色的记录器图像信号，该彩色图像处理系统包括用于将三色信号转换为分离的亮度和色度信号的转换器; 用于将亮度信号转换成在记录颜色再现范围内的范围转换亮度信号的范围转换器; 边缘检测器，用于从所述范围转换的亮度信号中获得边缘量信号; 色度检测器，用于从色度信号检测图像信号的色度; 用于增强由所述范围转换的亮度信号表示的图像的边缘部分的边缘增强器; 平滑电路，用于平滑所述范围转换的亮度信号; 亮度和色度转换器，其包括通过根据由边缘检测器检测的边缘量信号和边缘增强器的输出混合边缘增强器的输出和用于执行色度转换的转换器来提供色度来执行亮度转换的转换器 根据边缘检测器的输出和色度检测器的输出对应于色度的压缩/扩展的信号; 以及记录颜色转换器，用于根据使用颜色转换表的亮度和色度转换器的输出，生成包含印度墨水的四种颜色的记录器图像信号。

公开(公告)号：US5502579A

公开(公告)日：1996-03-26

申请号：US138430

申请日：1993-10-20

申请人： Shinji Kita ,  Hitoshi Ogatsu ,  Kazumasa Murai

发明人： Shinji Kita ,  Hitoshi Ogatsu ,  Kazumasa Murai

IPC分类号： B41J2/525 ,  G06T1/00 ,  G06T11/60 ,  H04N1/48 ,  H04N1/60 ,  H04N1/56

CPC分类号： H04N1/6022

摘要： A lightness/chromaticity separation device converts three input color signals to {L*, a*, b*} signals. A chroma determination device determines a chroma signal C* based on the {a*, b*} signals. An UCR ratio calculation device calculates an UCR ratio .alpha. according to a C*-.alpha. function that is adjustable by changing parameters. A nonlinear conversion circuit determines output color signals of four colors including black based on the {L*, a*, b*} signals and the UCR ratio. The nonlinear conversion circuit includes a network-type combination of a plurality of analog nonlinear operation units.

摘要翻译： 亮度/色度分离装置将三个输入颜色信号转换为{L *，a *，b *}信号。 色度确定装置基于{a *，b *}信号确定色度信号C *。 UCR比率计算装置根据通过改变参数可调整的C *-α函数计算UCR比α。 非线性转换电路基于{L *，a *，b *}信号和UCR比确定包括黑色的四种颜色的输出彩色信号。 非线性转换电路包括多个模拟非线性运算单元的网络型组合。

公开(公告)号：US5978107A

公开(公告)日：1999-11-02

申请号：US510539

申请日：1995-08-02

申请人： Kazumasa Murai ,  Shinji Kita ,  Hitoshi Ogatsu

发明人： Kazumasa Murai ,  Shinji Kita ,  Hitoshi Ogatsu

IPC分类号： G06F15/18 ,  B41J2/525 ,  G06N3/00 ,  G06T1/00 ,  G06T1/20 ,  G09G5/06 ,  H04N1/46 ,  H04N1/60 ,  G03F3/08

CPC分类号： H04N1/6019 ,  H04N1/603

摘要： A method of determining lattice point data of a look-up table for transforming input color coordinates into colorant coordinates of a color image output device, or of reconstructing the same by using a differentiable-continuous function. An input-output characteristic of the device is determined by using a differentiable-continuous function based on discrete transformation pairs, and coefficients of color transformation that uses a look-up table or a continuous function is determined based on the thus-determined differentiable-continuous function.

摘要翻译： 一种确定用于将输入颜色坐标变换为彩色图像输出装置的着色剂坐标的查找表的格点数据的方法，或者通过使用可微分连续的函数重建该坐标表的方法。 通过使用基于离散变换对的可微分连续函数来确定装置的输入 - 输出特性，并且基于由此确定的可微分连续性确定使用查找表或连续函数的颜色变换系数 功能。

公开(公告)号：US06172776B2

公开(公告)日：2001-01-09

申请号：US08771143

申请日：1996-12-20

申请人： Kazumasa Murai ,  Hitoshi Ogatsu

发明人： Kazumasa Murai ,  Hitoshi Ogatsu

IPC分类号： G03F308

CPC分类号： H04N1/6022

摘要： Device independent color signals in color coordinates of the calorimetric system are computed using the color signals Ci, Mi, Yi, Ki in first CMYK coordinates. A maximum quantity of black maxKi of the color signals Ci, Mi, Yi, Ki is computed by using the color signals Ci, Mi, Yi, Ki and the device independent color signals. A black ratio g of the color signals Ci, Mi, Yi, Ki is computed using the maximum black quantity maxKi and the color signal Ki. A maximum quantity of black that can be obtained without changing the device independent color signals is computed using the device independent color signals. The color signal Ko in second CMYK coordinates is determined by the maximum black quantity and the black ratio, and the color signals Co, Mo, Yo, Ko in the CMYK coordinates are determined by using the device independent color signals and the color signal Ko.

摘要翻译： 使用第一CMYK坐标中的颜色信号Ci，Mi，Yi，Ki计算量热系统的颜色坐标中的装置独立颜色信号。 通过使用颜色信号Ci，Mi，Yi，Ki和设备无关的颜色信号来计算颜色信号Ci，Mi，Yi，Ki的最大黑色maxKi的最大量。 使用最大黑量maxKi和颜色信号Ki来计算颜色信号Ci，Mi，Yi，Ki的黑色比率g。 使用与设备无关的颜色信号来计算可以在不改变设备独立颜色信号的情况下获得的最大黑色量。 第二CMYK坐标中的颜色信号Ko由最大黑色和黑色比率确定，并且通过使用与器件无关的颜色信号和颜色信号Ko来确定CMYK坐标中的颜色信号Co，Mo，Yo，Ko。

公开(公告)号：US6130675A

公开(公告)日：2000-10-10

申请号：US5029

申请日：1998-01-12

申请人： Kazumasa Murai ,  Hitoshi Ogatsu

发明人： Kazumasa Murai ,  Hitoshi Ogatsu

IPC分类号： B41J2/525 ,  G06T1/00 ,  H04N1/46 ,  H04N1/60 ,  G06F15/00

CPC分类号： H04N1/6016 ,  H04N1/6058

摘要： Input color signals are input at step S11 and are converted into first CMYK color material amounts to minimize a first distance function at step S12. At step S13, color coordinates reproduced from the first CMYK color material amounts are obtained based on a printer model. If the input color signals are determined within a color reproduction range at step S14, the first CMYK color material amounts are output at step S22. If the input color signals are determined outside the color reproduction range, reproduced lightness is compared with input lightness at step S15. If the reproduced lightness is less than the input lightness, lightness weight .alpha. responsive to a yellow saturated color rate is used to generate a second distance function at steps S16-S18. On the other hand, if the reproduced lightness is equal to or greater than the input lightness at step S15, a second distance function having weight as a constant is generated at steps S19 and S20. Second YMCK color material amounts to minimize the second distance function are calculated at step S21 and are output at step S22.

摘要翻译： 在步骤S11输入输入颜色信号，并将其转换为第一CMYK颜色材料量，以在步骤S12将第一距离功能最小化。 在步骤S13中，基于打印机模型获得从第一CMYK颜色材料量重现的颜色坐标。 如果在步骤S14在颜色再现范围内确定输入颜色信号，则在步骤S22输出第一CMYK色材料量。 如果在颜色再现范围之外确定输入颜色信号，则在步骤S15将再现亮度与输入亮度进行比较。 如果再现亮度小于输入亮度，则在步骤S16-S18，使用响应于黄色饱和色彩速率的亮度权重α来产生第二距离函数。 另一方面，如果在步骤S15中再现的​​亮度等于或大于输入亮度，则在步骤S19和S20中产生具有权重作为常数的第二距离函数。 在步骤S21中计算出使第二距离功能最小化的第二YMCK颜色材料，并在步骤S22输出。

公开(公告)号：US5719956A

公开(公告)日：1998-02-17

申请号：US542259

申请日：1995-10-12

申请人： Hitoshi Ogatsu ,  Shinji Kita

发明人： Hitoshi Ogatsu ,  Shinji Kita

IPC分类号： H04N9/79 ,  G06T1/00 ,  H04N1/46 ,  H04N1/60 ,  G03F3/08

CPC分类号： H04N1/6025

摘要： The CiMiYi signals of input CiMiYiKi signals are converted into CoMoYo signals of CoMoYoKo signals by using three-dimensional LUT color converting devices. The Ki signal of the input CiMiYiKi signals is subjected to gradation conversion to obtain the Ko signal of the CoMoYoKo signals by using a one-dimensional LUT.

摘要翻译： 输入CiMiYiKi信号的CiMiYi信号通过使用三维LUT颜色转换装置转换成CoMoYoKo信号的CoMoYo信号。 对输入的CiMiYiKi信号的Ki信号进行灰度转换，通过使用一维LUT来获得CoMoYoKo信号的Ko信号。

公开(公告)号：US6035065A

公开(公告)日：2000-03-07

申请号：US871757

申请日：1997-06-09

申请人： Yuji Kobayashi ,  Shingo Uchihashi ,  Nobuyuki Takeo ,  Hitoshi Ogatsu ,  Shinji Kita

发明人： Yuji Kobayashi ,  Shingo Uchihashi ,  Nobuyuki Takeo ,  Hitoshi Ogatsu ,  Shinji Kita

IPC分类号： G06T5/20 ,  G06K9/46

CPC分类号： G06T5/004 ,  G06T5/20

摘要： An image processing coefficient determination method of an image processing system comprising the steps of:outputting test pattern image data having one or more image areas each containing a specific spatial frequency component by an image output device for preparing an output image,measuring a spatial frequency characteristic of the output image, anddetermining spatial frequency processing coefficients from a relationship between a spatial frequency characteristic of the test pattern image data and the measurement result of the spatial frequency characteristic of the output image.

摘要翻译： 一种图像处理系统的图像处理系数确定方法，包括以下步骤：通过用于准备输出图像的图像输出装置输出具有一个或多个图像区域的测试图案图像数据，每个图像区域包含特定空间频率分量，测量空间频率特性 并且根据测试图案图像数据的空间频率特性与输出图像的空间频率特性的测量结果之间的关系来确定空间频率处理系数。

公开(公告)号：US5764795A

公开(公告)日：1998-06-09

申请号：US590937

申请日：1996-01-24

申请人： Nobuyuki Takeo ,  Hitoshi Ogatsu ,  Shinji Kita

发明人： Nobuyuki Takeo ,  Hitoshi Ogatsu ,  Shinji Kita

IPC分类号： H04N1/60

CPC分类号： H04N1/6022

摘要： Three-dimensional LUTs produce a lightness signal L* from input color signals C, M and Y. The three-dimensional LUTs are respectively provided for four divisional sections of an input color signal K. A three-dimensional LUT switching device judges to what section a current value of the input color signal K belongs. A selector selects one of the LUTs in accordance with a judgment result. Similar processing is performed for chromaticity signals a* and b*. According to another aspect of the invention, three-dimensional LUT color converters produce color signals L.sub.2 *, a.sub.2 * and b.sub.2 * based on only input color signals C, M and Y. A position in the L*a*b* space of the color signals L.sub.2 *, a.sub.2 * and b.sub.2 * has a deviation from a position of color signals L.sub.1 *, a.sub.1 * and b.sub.1 * to be output actually. Based on an input color signal K, a one-dimensional LUT produces a lightness signal L.sub.3 *, which corresponds to the deviation. A color signal combining means produces final output color signals L.sub.1 *, a.sub.1 * and b.sub.1 * based on the color signals L.sub.2 *, a.sub.2 * and b.sub.2 * and the lightness signal L.sub.3 *.

摘要翻译： 三维LUT从输入颜色信号C，M和Y产生亮度信号L *。三维LUT分别被提供给输入彩色信号K的四个分割部分。三维LUT切换装置判断哪个部分 输入颜色信号K的当前值属于。 选择器根据判断结果选择一个LUT。 对色度信号a *和b *进行类似的处理。 根据本发明的另一方面，三维LUT颜色转换器仅基于输入颜色信号C，M和Y产生颜色信号L2 *，a2 *和b2 *。在L * a * b *空间中的位置 颜色信号L2 *，a2 *和b2 *与颜色信号L1 *，a1 *和b1 *的位置实际偏离。 基于输入颜色信号K，一维LUT产生对应于偏差的亮度信号L3 *。 颜色信号组合装置基于颜色信号L2 *，a2 *和b2 *和亮度信号L3 *产生最终输出颜色信号L1 *，a1 *和b1 *。

公开(公告)号：US5724442A

公开(公告)日：1998-03-03

申请号：US426019

申请日：1995-04-19

申请人： Hitoshi Ogatsu ,  Shinji Kita

发明人： Hitoshi Ogatsu ,  Shinji Kita

IPC分类号： G03F3/08 ,  G06T1/00 ,  G06T1/20 ,  G06T11/00 ,  G09G5/06 ,  H04N1/46 ,  H04N1/60

CPC分类号： H04N1/6058

摘要： Binary data corresponding to respective lattice point data addresses of a direct look-up table and indicating an inside or outside of a color reproduction range of an output device are retained. Based on the binary data, a judgment is made of whether an input color signal is located inside or outside the color reproduction range of the output device. A lattice point data address that is generated from the input color signal is compressed based on a result of the above judgment. The judging and compressing operations are repeated to generate lattice point data addresses so that they are located inside the color reproduction range of the output device.

摘要翻译： 对应于直接查找表的各个格点数据地址并指示输出设备的颜色再现范围内部或外部的二进制数据被保留。 基于二进制数据，判断输入颜色信号是否位于输出装置的颜色再现范围内部或外部。 基于上述判断的结果，压缩从输入色信号生成的格点数据地址。 重复判断和压缩操作以产生格点数据地址，使得它们位于输出设备的颜色再现范围内。