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1. 发明授权

EP3073328B1 IMAGE FORMING APPARATUS GENERATING CONVERSION CONDITION OF MEASUREMENT UNIT AND METHOD FOR CONTROLLING THE SAME 有权
公开(公告)号：EP3073328B1
公开(公告)日：2018-08-22
申请号：EP16161451.6
申请日：2016-03-21
申请人： Canon Kabushiki Kaisha
发明人： NEGISHI, Hayato , NAKASE, Takahiro , TAKURA, Keizo , HORI, Atsushi
IPC分类号： G03G15/00 , G03G15/01 , H04N1/407 , H04N1/60
CPC分类号： H04N1/6025 , G03G15/01 , G03G15/0189 , G03G15/5054 , G03G15/5062 , G03G2215/00569 , H04N1/4078 , H04N1/6027
摘要： An image forming apparatus comprising: control means controlling image forming means to form a test image, controlling measurement means to measure the test image on an image bearing member, and controlling transfer means to transfer the test image formed on the image bearing member to the sheet; reception means receiving a user instruction; and second generation means generating the conversion condition based on the user instruction and the measurement result of the test image, wherein the test image includes a first test image, a second test image, and an image indicating a position where the sheet is to be bent, and in a case where the sheet is bent along the position, a position of the first test image and a position of the second test image do not overlap with each other.

2. 发明公开

EP2989783A1 CREATING A COLOR GAMUT LOOK-UP-TABLE 有权转让
标题翻译：生成彩色图刻度
公开(公告)号：EP2989783A1
公开(公告)日：2016-03-02
申请号：EP13791946.0
申请日：2013-10-30
申请人： Hewlett-Packard Development Company, L.P.
发明人： MOROVIC, Peter , BENEDICTO, Jordi Arnabat , BENITO, Jordi Vilar , MOROVIC, Jan
IPC分类号： H04N1/60
CPC分类号： H04N1/6025 , H04N1/605 , H04N1/6058
摘要： A color look-up-table (LUT) is created for use by an imaging system which uses a resource to display an image and/or provides an attribute of the image. A method of creating the LUT, comprises selecting (S1) a threshold value of resource usage and/or metric of the attribute. A predetermined color look-up-table representing a mapping from color values of a first color gamut to color values displayable by the imaging system is accessed. The predetermined color look-up-table has nodes defining colors to be displayed for the said color values. Resource usage and/or attribute values associated with the said nodes are compared with the threshold value thereby determining the set of nodes of the predetermined gamut having a resource usage and/or attribute values less than the threshold value (S2a, S2b, S3, S4). A new look-up-table is created (S5) which maps the said predetermined color gamut look-up-table to the said set of nodes.

3. 发明公开

EP2989782A1 SPECTRAL PRINT MAPPING 有权转让
标题翻译：光谱打印映射
公开(公告)号：EP2989782A1
公开(公告)日：2016-03-02
申请号：EP13722316.0
申请日：2013-04-22
申请人： Hewlett-Packard Development Company, L.P.
发明人： MOROVIC, Peter , MOROVIC, Jan
IPC分类号： H04N1/60
CPC分类号： H04N1/6019 , G06K15/027 , G06K15/1878 , G06T5/00 , G06T2207/10024 , G06T2207/30176 , H04N1/00954 , H04N1/4072 , H04N1/6008 , H04N1/6025 , H04N1/605 , H04N1/6058 , H04N2201/0082
摘要： A color look-up-table (LUT) is created for use by an imaging system which uses a resource to display an image and/or provides an attribute of the image. A method of creating the LUT, comprises selecting (S1) a threshold value of resource usage and/or metric of the attribute. A predetermined color look-up-table representing a mapping from color values of a first color gamut to color values displayable by the imaging system is accessed. The predetermined color look-up-table has nodes defining colors to be displayed for the said color values. Resource usage and/or attribute values associated with the said nodes are compared with the threshold value thereby determining the set of nodes of the predetermined gamut having a resource usage and/or attribute values less than the threshold value (S2a, S2b, S3, S4). A new look-up-table is created (S5) which maps the said predetermined color gamut look-up-table to the said set of nodes.
摘要翻译：描述了用于生成打印映射的方法和用于图像处理的方法。打印映射包括获得打印流体的光谱特性并确定用于计算光谱空间中的色域的反射率值。该色域为打印设备提供了反射与Neugebauer主要区域覆盖率的映射。

4. 发明授权

EP1173004B1 Colour image processing apparatus and method 有权
标题翻译：颜色处理设备和方法
公开(公告)号：EP1173004B1
公开(公告)日：2014-09-10
申请号：EP01306068.6
申请日：2001-07-13
申请人： CANON KABUSHIKI KAISHA
发明人： Saito, Kazuhiro , Torigoe, Makoto , Iida, Yoshiko , Suwa, Tetsuya
IPC分类号： H04N1/60
CPC分类号： H04N1/6025

5. 发明授权

EP1649409B1 PREDICTION MODEL FOR COLOR SEPARATION, CALIBRATION AND CONTROL OF PRINTERS 有权
标题翻译：预测模型用于色彩分离，校准和控制打印机
公开(公告)号：EP1649409B1
公开(公告)日：2006-11-22
申请号：EP04744023.5
申请日：2004-07-13
申请人： Ecole Polytechnique Fédérale de Lausanne
发明人： HERSCH, Roger, D. , EMMEL, Patrick , COLLAUD, Fabien
IPC分类号： G06K15/12 , H04N1/60
CPC分类号： H04N1/6097 , G06K2215/0094 , H04N1/6025 , H04N1/603 , H04N1/6033
摘要： The present invention facilitates the calibration of printers and the color separation of input images into a set of inks by disclosing methods and systems for populating device-calibration lookup tables. The disclosed methods and systems rely on a comprehensive spectral prediction model which is capable of predicting at a high accuracy the reflectance spectra of halftone ink patches. The comprehensive spectral prediction model is composed of a first part predicting the reflection spectra as a function of physical (mechanical) surface coverages an of a second part comprising functions mapping nominal surface coverages to effective surface coverages. These mapping functions are calibrated by halftone patch wedges printed alone and by halftone patch wedges printed in superposition with one or several solid inks. The part of the comprehensive spectral prediction model predicting the reflection spectra relies on a weighted average between one component behaving according to the Clapper-Yule model and another component behaving as the spectral Neugebauer model, extended to include multiple internal reflections at the paper-air boundary. The disclosed methods and systems can perform the color separation as well as the calibration of printers printing with standard cyan, magenta, and yellow inks as well as with inks comprising standard and non-standard inks such as Pantone inks (custom inks). They are also used for performing precise undercolour removal in order to carry out the color separation of images into cyan, magenta, yellow and black inks. The can further be used to carry out the color separation of images into cyan, magenta, yellow, black, light cyan and light magenta inks. In addition, the disclosed methods and systems can be used for printer control, i.e. to control printer actuation parameters in different types of printers e.g. liquid ink professional printers (offset, gravure, letterpress), electrophotographic printers, ink-jet printers, thermal transfer printers and in dye-sublimation printers.
摘要翻译：通过公开用于填充设备校准查找表的方法和系统，本发明便于校准打印机和将输入图像分色成一组墨水。所公开的方法和系统依赖于能够以高精度预测半色调墨块的反射光谱的综合光谱预测模型。综合光谱预测模型由第一部分和第二部分组成，第一部分将反射光谱预测为物理（机械）表面覆盖度的函数，第二部分包括将名义表面覆盖率映射到有效表面覆盖率的函数。这些映射功能通过单独打印的半色调补丁楔和通过一个或多个固体墨叠合印刷的半色调补丁楔进行校准。预测反射光谱的综合光谱预测模型的部分依赖于根据Clapper-Yule模型表现的一个分量与表现为光谱Neugebauer模型的另一个分量之间的加权平均值，其扩展为在纸空气边界处包括多个内部反射。所公开的方法和系统可以执行颜色分离以及使用标准青色，品红色和黄色墨水以及包括标准墨水和非标准墨水（例如Pantone墨水（定制墨水））的墨水进行打印的打印机的校准。它们还用于执行精确的底色去除，以将图像分色为青色，品红色，黄色和黑色墨水。可以进一步用于将图像分色为青色，品红色，黄色，黑色，浅青色和浅品红色墨水。另外，所公开的方法和系统可用于打印机控制，即用于控制不同类型打印机中的打印机致动参数，例如，液体油墨专业打印机（胶印，凹版印刷，凸版印刷），电子照相打印机，喷墨打印机，热转印打印机和热升华打印机。

6. 发明公开

EP1441505A3 A smooth gray component replacement strategy that utilizes the full device gamut 审中-公开
标题翻译：策略下整个设备调色板的利用平滑更换灰色股
公开(公告)号：EP1441505A3
公开(公告)日：2005-11-23
申请号：EP04000653.8
申请日：2004-01-14
申请人： Xerox Corporation
发明人： Maltz, Martin S.
IPC分类号： H04N1/60
CPC分类号： G06K15/00 , H04N1/6025 , H04N1/6058
摘要： Systems and methods are disclosed of a smooth gray component replacement strategy which utilizes the full gamut of a printer device. A CMY to CMYK gray component replacement transform is disclosed which inherently exploits the full gamut of the printer, by transforming points in CMY cube to L*a*b* color space, scaling the obtained values so they fill the maximum gamut obtainable with the printer device and calculating the CMYK values needed to obtain the scaled L*a*b* values. The CMY to CMYK transform is then smoothed with an averaging filter that does not change CMYK values at the comers. The entire color gamut is adequately sampled and small changes in CMY do not produce large jumps in L*a*b*.

7. 发明公开

EP1235423A3 Reduction of dependence of color appearance on light source 审中-公开
标题翻译：光源的颜色外观的依赖性减少
公开(公告)号：EP1235423A3
公开(公告)日：2005-08-31
申请号：EP02004041.6
申请日：2002-02-22
申请人： SEIKO EPSON CORPORATION
发明人： Yamamoto, Yuko
IPC分类号： H04N1/60
CPC分类号： H04N1/6088 , H04N1/52 , H04N1/6025
摘要： A look up table LUT with specific gray reproduction characteristics is used for converting RGB image data to multi-tone data of ink colors. The gray reproduction characteristics of LUT are set such that the color difference ΔE of a gray color area with an arbitrary tone level in the L*a*b* color system is kept at about 4 or less, assuming that the results are observed under two different light sources, such as standard light D50 and standard light A, respectively.

8. 发明公开

EP1085748A2 Method and apparatus for converting a colour image signal 审中-公开
标题翻译：用于彩色图像信号的转换的方法和装置
公开(公告)号：EP1085748A2
公开(公告)日：2001-03-21
申请号：EP00119835.7
申请日：2000-09-12
申请人： FUJI PHOTO FILM CO., LTD.
发明人： Okamoto, Takahiro
IPC分类号： H04N1/60
CPC分类号： H04N1/6025 , H04N1/6033
摘要： A new calibration scale is proposed for as a substitute for density values of a densitometer or equivalent neutral densities. A color reproduction range (100) of a color reversal film is set on an xy chromaticity diagram. On the xy chromaticity diagram, there are established three straight lines (111, 112, 113) passing through a chromaticity point (118) corresponding to a standard white illuminant and principal wavelengths relative to primary colors R, G, B. Vertexes (121, 122, 123) of a triangle (116) containing the color reproduction range (100) are determined on the three straight lines (111, 112, 113). Chromaticity values at the vertexes of said triangle are determined as primary colors R, G, B. Block dye density values c, m, y corresponding to the primary colors R, G, B are determined according to the equations R = 10 -c , G = 10 -m , B = 10 -y . The determined block dye density values c, m, y are used as a new calibration scale. Since the block dye density values have properties similar to conventional density values as compared with colorimetric values, conventional image processing resources can be utilized.

9. 发明公开

EP0779736A3 Data conversion table changing 失效
标题翻译： Abänderungeiner Datenumwandlungstabelle
公开(公告)号：EP0779736A3
公开(公告)日：2001-03-07
申请号：EP96118765.5
申请日：1996-11-22
申请人： DAINIPPON SCREEN MFG. CO., LTD.
发明人： Matsumura, Akira, Dainippon Screen Mfg. Co., Ltd.
IPC分类号： H04N1/60
CPC分类号： H04N1/6097 , H04N1/6025 , H04N1/6052
摘要： In a three-dimensional LUT for color conversion, the values of converted color component data C', M', and Y' are varied for a specific combination of the values of color component data C, M, and Y representing white, and the values of converted data are then changed for other combinations accompanied by the variation with respect to the specific combination. Referring to Fig. 1B, a concrete procedure first calculates variations of the values of color component data C', M', and Y' at steps S20, and then selects combinations of the values of color component data C, M, and Y for which the values of color component data C', M', and Y' are not changed, among a plurality of combinations of the values of color component data C, M, and Y at step S22. For colors between white and cyan, magenta, yellow or black, the variations of the values of color component data C', M', and Y' are set to decrease in an increase in distance from a point corresponding to white in a three-dimensional color space at step S24. The procedure then leads Laplace's Equation including the variations and the values of color component data C, M, and Y as variables at step S26, and solves the Laplace's Equation to determine the variations of the values of color component data C', M', and Y' for each combination of the values of color component data C, M, and Y at step S28. This procedure enables the contents of the three-dimensional LUT for color conversion to be changed readily within a short time.
摘要翻译：在用于颜色转换的三维LUT中，转换的颜色分量数据C'，M'和Y'的值针对表示白色的颜色分量数据C，M和Y的值的特定组合而变化，然后，转换数据的值随着相对于特定组合的变化而变化。参见图如图1B所示，具体步骤首先在步骤S20中计算颜色分量数据C'，M'和Y'的值的变化，然后选择颜色分量数据C，M和Y的值的组合，在步骤S22，颜色分量数据C，M'和Y'在色彩分量数据C，M和Y的值的多个组合中不改变。对于白色和青色，品红色，黄色或黑色之间的颜色，颜色分量数据C'，M'和Y'的值的变化被设置为在三维图像中与对应于白色的点的距离的增加中减小，在步骤S24的三维颜色空间。该程序在步骤S26中引导包括颜色分量数据C，M和Y的变化和值作为变量的拉普拉斯方程，并且求解拉普拉斯方程以确定颜色分量数据C'，M'的值的变化，和Y'，用于在步骤S28的颜色分量数据C，M和Y的值的每个组合。该过程使得能够在短时间内容易地改变用于颜色转换的三维LUT的内容。

10. 发明授权

EP0681396B1 Method and apparatus for calibrating a four color printer 失效
标题翻译：用于校准四色印刷机的方法和装置
公开(公告)号：EP0681396B1
公开(公告)日：1999-06-30
申请号：EP95420108.3
申请日：1995-04-25
申请人： EASTMAN KODAK COMPANY
发明人： Spaulding, Kevin Edward, c/o Eastman Kodak Co. , Couwenhoven, Douglas W., c/o Eastman Kodak Co. , Miller, Rodney L., c/o Eastman Kodak Co.
IPC分类号： H04N1/60
CPC分类号： H04N1/6025

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