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1.发明授权公开(公告)号：US07423778B2
公开(公告)日：2008-09-09
申请号：US10631743
申请日：2003-08-01
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 predicting at a high accuracy the reflectance spectra of halftone ink patches. The spectral prediction model is composed of a first part predicting the reflection spectra as a function of physical (mechanical) surface coverages and of a second part comprising functions mapping nominal surface coverages to effective surface coverages for halftone patch wedges printed alone and halftone patch wedges printed in superposition with one or several solid inks. In addition, the disclosed methods and systems can be used 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 dye-sublimation printers.
摘要翻译： 本发明通过公开用于填充设备校准查找表的方法和系统来促进打印机的校准和输入图像的颜色分离成一组油墨。 所公开的方法和系统依赖于全面的光谱预测模型，以高精度预测半色调墨迹的反射光谱。 光谱预测模型由第一部分组成，第一部分预测作为物理（机械）表面覆盖物的函数的反射光谱，第二部分包括将标称表面覆盖率与单独打印的半色调补片楔的有效表面覆盖度的函数以及印刷的半色调补片楔 与一种或几种固体油墨叠加。 此外，所公开的方法和系统可用于控制不同类型的打印机中的打印机致动参数，例如 液体墨水专业打印机（胶印，凹版印刷，凸版印刷），电子照相打印机，喷墨打印机，热转印打印机和染料升华打印机。
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公开(公告)号：US07491424B2
公开(公告)日：2009-02-17
申请号：US10440355
申请日：2003-05-19
CPC分类号： B41M1/22 , B41M1/18 , B41M3/148 , B42D25/23 , B42D25/24 , B42D25/29 , B42D2033/10 , C09D11/02 , Y10T428/24876 , Y10T428/24901 , Y10T428/24909
摘要： The present invention discloses methods and systems for printing by superposing a metallic ink and transparent inks. These methods and systems are useful for color separating images into superpositions of a metallic ink and transparent inks both for design purposes and for the creation and authentication of security documents, such as banknotes, checks, diploma, corporate documents, passports, identity cards, credit cards, product labels, optical disks, CDs, DVDs, packages of medical drugs, cosmetics, and alcoholic drink bottles. By combining a metallic ink and transparent inks, one may create printed images behaving dynamically: an image viewed under specular reflection may be considerably different from the same image viewed under non-specular reflection. Patterns which are either dark or hidden become highlighted under specular reflection, yielding interesting visual effects. Metallic inks allow therefore to create visually appealing dynamically changing color images. In addition, the inversion effect provided by metallic inks allows to enhance microstructures present in the image or to reveal hidden patterns. Since these effects are lost in photocopied documents, the disclosed methods, systems and security documents offer a high security against counterfeiting attempts.
摘要翻译： 本发明公开了通过重叠金属油墨和透明油墨进行印刷的方法和系统。 这些方法和系统对于将图像颜色分离为金属墨水和透明墨水的叠加是有用的，用于设计目的以及安全文件的创建和认证，例如钞票，支票，文凭，公司文件，护照，身份证，信用证 卡，产品标签，光盘，CD，DVD，药物包装，化妆品和酒精饮料瓶。 通过组合金属墨水和透明墨水，可以创建动态的印刷图像：在镜面反射下观看的图像可能与在非镜面反射下观看的相同图像显着不同。 黑暗或隐藏的图案在镜面反射下突出显示，产生有趣的视觉效果。 因此，金属油墨可以产生视觉上吸引人的动态变化的彩色图像。 此外，由金属油墨提供的反转效应允许增强存在于图像中的微结构或露出隐藏的图案。 由于这些影响在影印文件中丢失，所披露的方法，系统和安全文件提供了高度的安全性来防止假冒尝试。
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公开(公告)号：US20050083540A1
公开(公告)日：2005-04-21
申请号：US10631743
申请日：2003-08-01
申请人： Roger Hersch , Patrick Emmel , Fabien Collaud
发明人： Roger Hersch , Patrick Emmel , Fabien Collaud
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 and 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 half-tone 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. They 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.
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