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1. 发明公开

EP3357226A1 COLOR CHANGING EFFECTS WITH CROSS-HALFTONE PRINTS ON METAL 有权转让
公开(公告)号：EP3357226A1
公开(公告)日：2018-08-08
申请号：EP16736223.5
申请日：2016-05-06
申请人： Ecole Polytechnique Fédérale de Lausanne (EPFL) , Hersch, Roger, David
发明人： HERSCH, Roger, David , PJANIC, Petar
IPC分类号： H04N1/52
摘要： We propose new methods for creating color varying prints with classical cyan, magenta, yellow inks on a metallic substrate. We use a special crossline halftone with optimized surface coverages of the inks to create color prints on a metallic surface whose colors change when rotating the print in-plane under specular reflection. These prints enable viewing on the same metallic print a first image with a first set of colors and upon in-plane rotation, the same image with parts colored with a different set of colors. They also enable viewing a first color image and upon rotation a second independent color image. Applications comprise counterfeit prevention, art, advertisement exhibitions and amusement parks.

2. 发明授权

EP1404532B1 IMAGES INCORPORATING MICROSTRUCTURES 有权
标题翻译： BILDER MIT MIKROSTRUKTUREN
公开(公告)号：EP1404532B1
公开(公告)日：2011-09-21
申请号：EP02743496.8
申请日：2002-07-05
申请人： Ecole Polytechnique Fédérale de Lausanne (EPFL)
发明人： HERSCH, Roger, David , WITTWER, Bernard , FORLER, Edouard , EMMEL, Patrick , BIEMANN, Daniel , GOROSTIDI, Daniel , BONGARD, Dominique
IPC分类号： G06T11/00
CPC分类号： B42D25/309 , B41M3/14 , B41M3/148 , B42D25/00 , B42D25/29 , B42D2035/26 , H04N1/23 , H04N1/4051
摘要： A method of generating an image incorporating a microstructure includes the steps of obtaining an original image, generating a microstructure, and rendering a region or the whole said original image with said microstructure. The operation of generating the microstructure includes an automatic synthesis of microstructure elements from original microstructure shapes.
摘要翻译：一种产生包含微结构的图像的方法包括以下步骤：获得原始图像，产生微结构，以及用所述微结构渲染区域或整个所述原始图像。生成微结构的操作包括从原始微结构形状自动合成微结构元件。

3. 发明公开

EP1404532A1 IMAGES INCORPORATING MICROSTRUCTURES 有权
标题翻译：与微结构PICTURES
公开(公告)号：EP1404532A1
公开(公告)日：2004-04-07
申请号：EP02743496.8
申请日：2002-07-05
申请人： Ecole Polytechnique Fédérale de Lausanne (EPFL)
发明人： HERSCH, Roger, David , WITTWER, Bernard , FORLER, Edouard , EMMEL, Patrick , BIEMANN, Daniel , GOROSTIDI, Daniel , Bongard, Dominique
IPC分类号： B42D15/10 , B42D15/00 , B41M3/14
CPC分类号： B42D25/309 , B41M3/14 , B41M3/148 , B42D25/00 , B42D25/29 , B42D2035/26 , H04N1/23 , H04N1/4051
摘要： A method of generating an image incorporating a microstructure includes the steps of obtaining an original image, generating a microstructure, and rendering a region or the whole said original image with said microstructure. The operation of generating the microstructure includes an automatic synthesis of microstructure elements from original microstructure shapes.

4. 发明公开

EP2158090A2 PRINTING COLOR IMAGES VISIBLE UNDER UV LIGHT ON SECURITY DOCUMENTS AND VALUABLE ARTICLES 有权转让
标题翻译：方法用紫外线可见光颜色打印图像打印保密文件及贵重物品
公开(公告)号：EP2158090A2
公开(公告)日：2010-03-03
申请号：EP08737545.7
申请日：2008-04-18
申请人： Ecole Polytechnique Fédérale de Lausanne (EPFL)
发明人： HERSCH, Roger, David , DONZE, Philip , CHOSSON, Sylvain
IPC分类号： B41M3/14
CPC分类号： B41M3/144
摘要： In the present invention, we propose a method of creating fluorescent color images visible under UV light. It relies on the new colorants that can be achieved by superposing ink dots, possibly at a reduced size, in order to avoid quenching effects. It also relies on juxtaposed halftoning, which ensures that colorants are printed side by side and do therefore not overlap, thereby preventing quenching effects. It also support the selection of a fluorescent set of inks which comprises at least one ink whose emission spectrum yields a color different from the standard red, green and blue colors, for example a yellow color emitting ink. The method comprises the following techniques: (a) creating new colorants by superposing carefully selected amounts of the fluorescent inks, (b) mapping the gamut of the image to be reproduced into the gamut of the resulting fluorescent colorants and (c) creating the target fluorescent color image by juxtaposed halftoning of the fluorescent colorants. Juxtaposed halftoning avoids quenching effects by creating diagonally oriented pre-computed colorant screen dots, which are printed side by side.' Thanks to gamut mapping and juxtaposed halftoning, we create color images, which are invisible under daylight and have, under UV light, a high resemblance with the original images. Applications comprises the protection of security documents such as bank notes, passports, ID cards, entry tickets, travel documents, checks, vouchers or valuable business documents as well as valuable articles such as CDs, DVDs, software packages, medical drugs, watches, personal care articles, and fashion articles. And a last application is art, decoration, publicity, fashion, and night life, where fluorescent images viewed under UV illumination at night or in the dark have a strongly appealing effect.

5. 发明公开

EP3368332A1 SYNTHESIS OF SUPERPOSITION SHAPE IMAGES BY LIGHT INTERACTING WITH SUPERPOSED LAYERS OF LENSLET GRATINGS 有权
公开(公告)号：EP3368332A1
公开(公告)日：2018-09-05
申请号：EP16736224.3
申请日：2016-05-31
申请人： Ecole Polytechnique Fédérale de Lausanne (EPFL)
发明人： HERSCH, Roger, David , WALGER, Thomas , FLAURAUD, Valentin , BRUGGER, Juergen , BESSON, Théophane
IPC分类号： B42D25/415 , B42D25/42 , B42D25/425 , B42D25/43 , B42D25/324 , B42D25/351 , B42D25/342 , B42D25/435 , B42D25/44 , B42D25/445 , G02B3/00 , G02B27/22 , G02B27/60
CPC分类号： B42D25/328 , B42D25/324 , B42D25/342 , B42D25/351 , B42D25/40 , B42D25/415 , B42D25/42 , B42D25/425 , B42D25/43 , B42D25/435 , B42D25/44 , B42D25/445 , D21H21/48 , G02B3/0006 , G02B3/0018 , G02B3/0031 , G02B3/0043 , G02B27/2207 , G02B27/2214 , G02B27/50 , G02B27/60 , G06K9/00442 , G06K9/6215 , H04N5/44
摘要： The present invention describes methods and apparatuses for creating superposition shape images by superposed base and revealing layers of lenslet gratings. The superposition shape images form a message recognizable by a human observer or by an image acquisition and computing device such as a smartphone. The superposition shape images may be created by different superposition techniques ranging from 1D moiré, 2D moiré and level-line moiré superposition techniques to lenticular image and phase shift superposition techniques. Moiré superposition techniques enable creating superposition shape images at different apparent depth levels. Applications comprise the protection of documents and valuable articles against counterfeits, the creation of eye-catching advertisements as well as the decoration of buildings and exhibitions.

6. 发明授权

EP2158090B1 METHOD FOR PRINTING COLOR IMAGES VISIBLE UNDER UV LIGHT ON SECURITY DOCUMENTS AND VALUABLE ARTICLES 有权转让
标题翻译：方法用紫外线可见光颜色打印图像打印保密文件及贵重物品
公开(公告)号：EP2158090B1
公开(公告)日：2013-03-27
申请号：EP08737545.7
申请日：2008-04-18
申请人： Ecole Polytechnique Fédérale de Lausanne (EPFL)
发明人： HERSCH, Roger, David , DONZE, Philip , CHOSSON, Sylvain
IPC分类号： B41M3/14
CPC分类号： B41M3/144

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