WO2012150426A1 - Procédé de fabrication d'une image iridescente, image obtenue et dispositif la comprenant, programme associe - Google Patents
Procédé de fabrication d'une image iridescente, image obtenue et dispositif la comprenant, programme associe Download PDFInfo
- Publication number
- WO2012150426A1 WO2012150426A1 PCT/FR2012/051313 FR2012051313W WO2012150426A1 WO 2012150426 A1 WO2012150426 A1 WO 2012150426A1 FR 2012051313 W FR2012051313 W FR 2012051313W WO 2012150426 A1 WO2012150426 A1 WO 2012150426A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- image
- layers
- iridescent
- scattered
- period
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 230000000737 periodic effect Effects 0.000 claims abstract description 52
- 230000003287 optical effect Effects 0.000 claims abstract description 48
- 230000004888 barrier function Effects 0.000 claims abstract description 32
- 239000006185 dispersion Substances 0.000 claims abstract description 21
- 239000000758 substrate Substances 0.000 claims description 11
- 239000003086 colorant Substances 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 9
- 230000006870 function Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 238000004590 computer program Methods 0.000 claims description 3
- 238000005034 decoration Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 2
- 239000010437 gem Substances 0.000 claims description 2
- 229910001751 gemstone Inorganic materials 0.000 claims description 2
- 230000003252 repetitive effect Effects 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 13
- 239000010410 layer Substances 0.000 description 8
- 238000007493 shaping process Methods 0.000 description 4
- 238000013507 mapping Methods 0.000 description 3
- 239000013598 vector Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- IUVCFHHAEHNCFT-INIZCTEOSA-N 2-[(1s)-1-[4-amino-3-(3-fluoro-4-propan-2-yloxyphenyl)pyrazolo[3,4-d]pyrimidin-1-yl]ethyl]-6-fluoro-3-(3-fluorophenyl)chromen-4-one Chemical compound C1=C(F)C(OC(C)C)=CC=C1C(C1=C(N)N=CN=C11)=NN1[C@@H](C)C1=C(C=2C=C(F)C=CC=2)C(=O)C2=CC(F)=CC=C2O1 IUVCFHHAEHNCFT-INIZCTEOSA-N 0.000 description 1
- 229920005372 Plexiglas® Polymers 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000010017 direct printing Methods 0.000 description 1
- 239000005326 engraved glass Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000010147 laser engraving Methods 0.000 description 1
- PWPJGUXAGUPAHP-UHFFFAOYSA-N lufenuron Chemical compound C1=C(Cl)C(OC(F)(F)C(C(F)(F)F)F)=CC(Cl)=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F PWPJGUXAGUPAHP-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformations in the plane of the image
- G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
- B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/342—Moiré effects
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/60—Systems using moiré fringes
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/003—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using security elements
-
- B42D2035/24—
-
- B42D2035/26—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44F—SPECIAL DESIGNS OR PICTURES
- B44F1/00—Designs or pictures characterised by special or unusual light effects
- B44F1/08—Designs or pictures characterised by special or unusual light effects characterised by colour effects
- B44F1/14—Iridescent effects
Definitions
- the invention relates to the field of creating iridescent images.
- the effect of iridescence occurs when our eyes, distant from each other, perceive from the same object different colors and / or intensities of light.
- Such images are for example used to achieve a more aesthetic display on product packaging. This results in eye-catching and striking effects for the consumer.
- An image of this type can also be provided on a bank card or phone, a showcase, a decoration, a press kit, a greeting card, a garment or shoe marking, or a communication element such as a commercial map.
- document EP 1 147 878 discloses a moiré or iridescent pattern made from a matrix of lenticular elements printed on at least one surface of a substrate. This device is not, however, fully satisfactory. Indeed, this document does not make it easy to make an iridescent image from a given reference image such as a drawing, a photograph or a text.
- the invention aims to overcome the disadvantages of the state of the art mentioned above.
- the method comprises the steps
- period adapted to an optical selector is meant a succession of repeated elements such as pixels of an image, the repetition of which corresponds to said optical selector used.
- period adapted to an image production system is meant a period whose resolution and number of colors can be reproduced by said given image production system.
- peripheral image means an image comprising a succession of elements repeated in a given period. These repeated elements give their colors to the effects of iridescence in the iridescent image obtained.
- reference image an image that represents the colors, what is perceived from the iridescent image.
- the reference image may for example represent a drawing, a picture or a text.
- optical selector means an element related to the scattered image to allow the observer to perceive the effects of iridescence.
- Such an optical selector is for example a linear lens array, also called a lenticular array, which comprises longitudinal cylindrical lenses.
- Such an optical selector may also be a spherical lens array or a parallax barrier.
- a barrier of parallax includes lines, circles, ellipses, squares, diamonds, zigzags, etc., the size and frequency of which are preferably fixed, and which can be printed, etched, molded, sandblasted or heat-laid on or in a transparent or translucent substrate for example PVC, glass, plexiglas® (polymethyl methacrylate) ... thus having a periodic structure of transparent areas, translucent or opaque.
- the optical selector may further comprise reserve zones (mask) if it is desired that the iridescent image does not exhibit an iridescence effect on its entirety.
- the reproduction of the dispersed image it is appropriate to precisely adjust the size of said dispersed image according to the optical selector used and the average observation distance defined according to the application envisaged. This is done according to the state of the art well known (pitch adjustment) by connecting an abacus with the optical selector under the same conditions as the final relationship.
- the chart consists of a periodic image with a basic period, black pixels white pixels, and contains areas with different size changes. The right one is the one that allows a very fast transition from black to white when the observer is placed at the defined average distance and moves slightly perpendicular to the lenses.
- formatting of an image, the realization of this image preferably by computer means.
- the relationship of the scattered image with the optical selector in order to obtain the iridescent image may consist of a reproduction of the scattered image shaped preferably on the face of the optical selector opposite the observer. , or a laminating on this face by providing a necessary space between the optical selector and the scattered image for focal reasons explained below.
- the scattered image formatted can also be reproduced on one face of the optical selector by etching, molding, sanding or any other method allowing such reproduction.
- the linking is for example a reproduction such as an engraving print, molding, sanding.
- the scattered image is etched behind the parallax barrier, itself engraved, leaving a detailed focal distance further between the two.
- the method further comprises a step of applying a blur on all or part of the reference image, before the step of applying said dispersion filter.
- the step of creating the periodic image and / or the step of creating the dispersed image is carried out by means of at least one mask covering at least a part of the image. periodic image and / or scattered image and / or optical selector.
- the color mode of the period is adapted to the reproduction system used and may represent either a single color layer, bitmap or gray level, or three layers red green blue, or four layers cyan yellow magenta black.
- the period comprises either a single color layer, in bitmap or grayscale, or two color layers whose lightest is a constant value over the whole of said period.
- the method described above in bitmap mode can also be adapted in vector mode by applying the dispersion filter to the vectors of the image instead of the pixels of the image, or by vectorizing the dispersed image.
- the modification of the position of the pixels has a maximum amplitude of between 0.5 and twice the size of a period.
- a higher amplitude creates many folds and can also be attractive for aesthetic purposes.
- the size of the periodic image and that of the reference image are proportional.
- the color mode of the periodic image represents either a single layer in gray level or three layers red green blue.
- the resolution of the reference image is less than or equal to the resolution of the periodic image.
- the optical selector is selected from the group comprising a linear lens array and a parallax barrier consisting of lines, and the dispersion function is applied on an axis substantially perpendicular to the linear or line lenses.
- the optical selector is a parallax barrier, and a second dispersed image is created from the reference image by applying a second dispersion filter to a periodic image adapted to said barrier.
- the step of relating the two scattered images together to create the iridescent image comprises a reproduction of said scattered images on either side or in a transparent or translucent substrate so that the parallax barrier consists of one of the two scattered images in combination with the transparent or translucent substrate.
- the invention also relates to a dispersed image obtained from a reference image, and intended to be observed through an optical selector characterized in that the dispersed image is shaped by modified position pixels. by an application of a dispersion filter in which the geometric position of the pixels of a periodic image of determined period, is modified according to the values of the corresponding pixels in the reference image.
- Another object of the invention consists of an iridescent image comprising the dispersed image described above, placed in relation with an optical selector selected from the group comprising a linear lens array, a spherical lens array, a parallax barrier. .
- an optical selector selected from the group comprising a linear lens array, a spherical lens array, a parallax barrier.
- the dispersed image and the iridescent image according to the invention are obtained by the method described above.
- the modification of the position of the pixels has an amplitude of between 0.5 and twice the size of a period.
- a higher amplitude creates many folds and can also be attractive for aesthetic purposes.
- Another object of the invention consists in a device characterized in that it comprises a dispersed image as described previously or obtained by the method described above, put in relation with an optical selector selected from the group comprising a network linear lenses, a spherical lens array, and a parallax barrier.
- Such a device may be, without limitation, a bank card or phone, a showcase, a packaging, a decoration, a garment or shoe marking, a ruler, a key ring, a bottle, a bottle , a plate, a glass, a vase, a lampshade, a box, an engraved glass block, a communication element such as a commercial card, a press kit, a plate, a sign, an industrial marking, a publishing product such as a poster, a postcard, a greeting card, a bookmark, a binder cover, a book, a notebook or a notebook, such a jewel a bracelet, a pendant, a brooch, the dial of a watch or a clock, a tile or glazing.
- a communication element such as a commercial card, a press kit, a plate, a sign, an industrial marking, a publishing product such as a poster, a postcard, a greeting card, a bookmark, a binder cover, a book, a notebook or
- Another object of the invention is a secret image comprising a dispersed image as described above, or obtained by the method described above, intended for one or more given observers, characterized in that the period and / or the adapted optical selector (SO) are known and / or held exclusively by said one or more observers given so as to recreate the corresponding iridescent image.
- SO optical selector
- Another object of the invention is an anti-counterfeit security image comprising a dispersed image as described above. or obtained by the method described above, or an iridescent image as described above or obtained by the method described above.
- Another object of the invention is a computer program product capable of being loaded into the memory of a control unit such as a computer, comprising means for implementing the method described above.
- FIG. 1A a periodic image making it possible to create an iridescent image according to FIG. invention
- Figure 1B the period of the image of Figure 1A, consisting of 5 black pixels and 5 white pixels.
- FIG. 3 a scattered image resulting from the dispersion filter applied to the periodic image of FIG. 1A as a function of the reference image of FIG. 2
- FIG. 4 an iridescent image comprising the scattered image of FIG. 3 relating to a linear lens array, and observed at different successive angles A1 to A6 and covering the whole of the optical selector field angle;
- Figure 5 is a schematic of a perspective view of a scattered image related to a linear lens array
- the dispersed image according to the invention is advantageously produced from a periodic IP image of a given period and from an IR reference image, by means of a computer program image processing.
- the reference image IR represents, with the colors, what will be seen in the iridescent image.
- Such a reference image is for example a photo, a pattern, a text or the like. It preferably has the same proportions as the periodic image IP.
- the periodic image IP used comprises a period of five black pixels T1 and five white pixels T2 illustrated in FIG. 1B.
- the period is chosen so as to be adapted to the reproduction system that will be used and to the optical selector constituted by here by a network of linear lenses.
- Such a lens array is shown in FIGS. 5 and 6.
- the periodic image IP will give its colors to the iridescent image -II-. Its mode of color is the same as that of the period and its resolution is the same as that of the period. Its size is the same as that of the iridescent image that we want to shape.
- the period and the periodic image preferably have a maximum resolution with respect to the quality of the reproduction system used, so that the period has many pixels, which makes it possible to produce rich gradients, and a displacement of better defined pixels when applying the dispersion filter.
- the period defines the colors that will be perceived in the iridescent image iridescence effects.
- the invention is realized without requiring a marking of the colors to be printed, and the period comprises pixels representing either a single layer, in flat or gray level, or two layers, the lighter of which is preferably invariant on the entire period.
- the invention is carried out with color tracking means, and the period includes as many layers of color that the reproduction system used allows, typically cyan magenta yellow black for printing.
- the dispersed image ID obtained comprises the pixels T1 and T2 of the periodic image which have been displaced by applying a dispersion filter (displacement mapping) detailed below.
- the displacement here is perpendicular to the longitudinal lens array, and to the left.
- the scattered image ID is related to a cylindrical lens array SO adapted to produce an iridescent image -II-. Applying a blur to the reference image makes it possible to visualize a characteristic border bc around the drawing in the iridescent image.
- the scattered image shows sharp breaks of the periodic elements, and the iridescent image does not show a border characteristic essentially because of the absence of blur in the reference image.
- the iridescent image II shows clear iridescent visual effects, dark according to the angle of observation, and the area of the image observed as illustrated in FIG. 4. It is possible to perceive the effect of iridescence in Figure 4 by observing two successive images, for example A1 and A2, stereoscopically for example in cross-vision or using a stereoscope.
- the reference image IR of FIG. 2 comprises a text composed of five masks M1 to M5, a non-blurred text 1, a blurred text 2 and a gray-level photo 3.
- the periodic image has been created by filling it with the period repetitively in using five masks to provide non-periodic reserve areas that will not show iridescence effect.
- the corresponding areas in the reference image IR will advantageously be filled with the color corresponding to a zero displacement during the application of the dispersion filter.
- a mask may also consist of sticking elements in the dispersed image before it is reproduced.
- a mask may also consist of applying a colorimetric filter to the periodic image or the dispersed image.
- Figures 5 and 6 illustrate an example of linking a SO lens array and a scattered image ID.
- the scattered image ID comprises pixels T1, T2, and is intended to be for example printed on the opposite side of the lens array SO or laminated thereon.
- a spacing -d- must be provided between the lens array and the scattered image as a function of the focal length of the cylindrical lenses.
- the manufacture of a linear parallax barrier may comprise the steps:
- Period Period Resolution / Barrier Resolution
- a dispersion filter on said periodic image representing the parallax barrier in order to distribute the displacements both on the parallax barrier and on the dispersed image.
- the connection consists in assembling the scattered image ID with the optical selector SO in order to obtain the iridescent image II.
- the optical selector SO consists of lenses (linear or spherical) the scattered image ID must be substantially at the focal length of said lenses. In general, the thickness of the commercially available lens arrays meets this requirement so that the image must be on the opposite side of the lenses (see FIGS. 5 and 6).
- the optical selector SO is a parallax barrier and a distance between the barrier and ID should be kept. To obtain an iridescence effect, that is to say, so that the two eyes of the observer perceive different images, it should be ensured that this distance is not too small.
- Example 1 network of linear lenses:
- the adapted period will be 1200 dpi and will include 10 online pixels which can for example be arranged in one of the following ways:
- the adapted period will be 1200 dpi and will be a square of 10x10 pixels which can be arranged as follows:
- the pixels can be arranged in the following manner - a gradient from white to black from (1, 1) to (1, 10) and from (1, 1) to (10, 1);
- Still to obtain a period with a gradient can create a black circle blur in the center of the square leaving the white pixels of the outline.
- the creation of the iridescent image is done by a method which comprises the steps of: (1) to characterize the geometric and repetitive structure of the optical selector, and optionally to fabricate the optical selector for example in the manner previously detailed for a parallax barrier.
- masks may be used to have several zones of different color periods or non-periodic zones that will not exhibit iridescence effects, or to apply a colorimetric filter,
- IR reference image including elements such as a drawing, a photo, a text, a pattern, etc.
- the displacement filter (Displacement mapping) requires for each pixel (Xip, Yip) of the periodic image IP the calculation of the coordinates (Xir, Yir) of its reference pixel in the IR.
- the periodic image IP and the reference image IR have the same size and the same resolution, that is to say the same number of pixels horizontally and vertically, the coordinates of the respective pixels are equal, according to the formula:
- ⁇ , ⁇ and XMAXÎ P , YMAXÎ are the respective sizes (in abscissa and ordinate) of the IR and periodic IP reference images and the Xir, Yir, Xip, Yip coordinates are integers.
- the coordinates of the reference pixels are calculated according to the formula
- the coordinates Xir, Yir are real numbers and the corresponding value is calculated by bilinear interpolation of the values of the neighboring whole pixels.
- the value of a pixel in the reference image IR represents a color such as a gray level, or three values red green blue. This is to match this color with a displacement value in pixels. To do this, it is necessary to limit the maximum displacement (Bmax) which will preferably be between 0.5 and 2 times the size of a period. When the color varies from its minimum to its maximum, the value of the displacement can vary from 0 to the defined maximum limit (Bmax) or from -Bmax / 2 to + Bmax 2.
- the means for producing the dispersed image intended for producing the iridescent image according to the invention are preferably implemented by computer, using an image processing software.
- the resulting scattered image is then generated and related to an optical selector as previously developed.
- a lenticular network consisting of cylindrical lenses or a parallax barrier consisting of lines they must be vertical to obtain the best effect of iridescence.
- the iridescence effect is then always preserved and the support has the added advantage of being animated when it is pivoted from bottom to top.
- the first comprises a rotation of the periodic IP image of alpha degrees, then the filling of the period, then the rotation of the IR reference image of alpha degrees, and then the creation of the scattered image ID by application. of the dispersion filter creating a horizontal displacement (dx), then a connection of the scattered image ID with the optical selector SO. The image will then look at it by reducing it by less than alpha degrees.
- the second way of proceeding comprises the filling of the periodic image IP with the inclined period of alpha degrees, then the creation of the scattered image ID by application of the dispersion filter creating a displacement (dx, dy) perpendicular to the cylindrical lenses or lines of the parallax barrier, before shaping, and the connection of the scattered image ID with the optical selector SO itself inclined at an angle of alpha degrees.
- a parallax barrier related to a scattered image can be chosen to decide whether to place one or the other in front or behind. The formatting will take this choice into account.
- an iridescent image in the following manner.
- a first scattered image is calculated with a displacement value ranging from 0 to + BMax; then a second scattered image is calculated with a displacement value ranging from 0 to -Bmax; and these two images are related on either side of a transparent or translucent substrate so that the scattered image closest to the observer acts as an optical selector in combination with the transparent substrate or translucent chosen in a suitable size.
- the image is reproduced inside the glass block, at the distance mentioned above.
- an iridescent image in the following manner.
- a first preferably dispersed image is calculated from the same reference image, with a displacement value ranging from 0 to + BMax; then calculating a second image dispersed preferably from a second periodic image adapted to said parallax barrier, with an opposite displacement value varying from 0 to -Bmax; and these two images are related on either side of a transparent or translucent substrate so that the dispersed image closest to the observer acts as an optical selector in combination with the transparent or translucent substrate selected in a suitable size.
- the two scattered images are reproduced inside the glass block, at the distance mentioned above.
- Such a second periodic image adapted to a parallax barrier advantageously comprises an alternation of black pixels and white pixels.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Optics & Photonics (AREA)
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Theoretical Computer Science (AREA)
- Stereoscopic And Panoramic Photography (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2834978A CA2834978A1 (fr) | 2012-06-12 | 2012-06-12 | Procede de fabrication d'une image iridescente, image obtenue et dispositif la comprenant, programme associe |
CN201280033106.0A CN103765297B (zh) | 2012-06-12 | 2012-06-12 | 制造虹彩图像的方法、得到的图像以及包括该图像的设备 |
US14/115,243 US20140183855A1 (en) | 2011-05-03 | 2012-06-12 | Method for production of an iridescent image, the resulting image, device comprising same and associated program |
EP12731134.8A EP2705401A1 (fr) | 2011-05-03 | 2012-06-12 | Procédé de fabrication d'une image iridescente, image obtenue et dispositif la comprenant, programme associe |
JP2014508867A JP2014526711A (ja) | 2012-06-12 | 2012-06-12 | 玉虫色画像を作り出す方法、結果として生じる画像、その玉虫色画像を備えたデバイス、及び関連するプログラム |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1153752 | 2011-05-03 | ||
FR1153752A FR2974930B1 (fr) | 2011-05-03 | 2011-05-03 | Procede de fabrication d'une image iridescente, image obtenue et dispositif la comprenant, programme associe |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2012150426A1 true WO2012150426A1 (fr) | 2012-11-08 |
WO2012150426A8 WO2012150426A8 (fr) | 2013-02-21 |
Family
ID=46420447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2012/051313 WO2012150426A1 (fr) | 2011-05-03 | 2012-06-12 | Procédé de fabrication d'une image iridescente, image obtenue et dispositif la comprenant, programme associe |
Country Status (4)
Country | Link |
---|---|
US (1) | US20140183855A1 (fr) |
EP (1) | EP2705401A1 (fr) |
FR (1) | FR2974930B1 (fr) |
WO (1) | WO2012150426A1 (fr) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1147878A2 (fr) | 2000-04-17 | 2001-10-24 | Impact Group | Effects de moiré ou d'iridescence par lentille lenticulaire à image double |
WO2004113954A2 (fr) * | 2003-06-25 | 2004-12-29 | Ovd Kinegram Ag | Element de securite optique |
JP2007144671A (ja) * | 2005-11-25 | 2007-06-14 | National Printing Bureau | 真偽判別可能な印刷物 |
EP2071492A1 (fr) * | 2006-07-12 | 2009-06-17 | ShenZhen DigiGraphics Technology Company Ltd. | Système d'identification d'images cachées, produits, dispositif d'identification et procédé de fabrication |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6104812A (en) * | 1998-01-12 | 2000-08-15 | Juratrade, Limited | Anti-counterfeiting method and apparatus using digital screening |
AU6944200A (en) * | 1999-09-01 | 2001-03-26 | Digimarc Corporation | Watermarking digital images with intensity specified by area |
US8301893B2 (en) * | 2003-08-13 | 2012-10-30 | Digimarc Corporation | Detecting media areas likely of hosting watermarks |
US7860268B2 (en) * | 2006-12-13 | 2010-12-28 | Graphic Security Systems Corporation | Object authentication using encoded images digitally stored on the object |
DE102007005884B4 (de) * | 2007-02-07 | 2022-02-03 | Leonhard Kurz Stiftung & Co. Kg | Sicherheitsdokument |
US8217997B2 (en) * | 2010-03-16 | 2012-07-10 | Interphase Corporation | Interactive display system |
-
2011
- 2011-05-03 FR FR1153752A patent/FR2974930B1/fr active Active
-
2012
- 2012-06-12 US US14/115,243 patent/US20140183855A1/en not_active Abandoned
- 2012-06-12 WO PCT/FR2012/051313 patent/WO2012150426A1/fr active Application Filing
- 2012-06-12 EP EP12731134.8A patent/EP2705401A1/fr not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1147878A2 (fr) | 2000-04-17 | 2001-10-24 | Impact Group | Effects de moiré ou d'iridescence par lentille lenticulaire à image double |
WO2004113954A2 (fr) * | 2003-06-25 | 2004-12-29 | Ovd Kinegram Ag | Element de securite optique |
JP2007144671A (ja) * | 2005-11-25 | 2007-06-14 | National Printing Bureau | 真偽判別可能な印刷物 |
EP2071492A1 (fr) * | 2006-07-12 | 2009-06-17 | ShenZhen DigiGraphics Technology Company Ltd. | Système d'identification d'images cachées, produits, dispositif d'identification et procédé de fabrication |
Non-Patent Citations (1)
Title |
---|
See also references of EP2705401A1 |
Also Published As
Publication number | Publication date |
---|---|
WO2012150426A8 (fr) | 2013-02-21 |
EP2705401A1 (fr) | 2014-03-12 |
US20140183855A1 (en) | 2014-07-03 |
FR2974930B1 (fr) | 2013-11-08 |
FR2974930A1 (fr) | 2012-11-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2585308B1 (fr) | Procede d'autentification et/ou d'identification d'un article de securite | |
CH713112B1 (fr) | Dispositif pour créer des images de forme en superposition par interaction lumineuse avec des couches de lentilles. | |
WO2011161635A1 (fr) | Procede d ' authentification et/ou d'identification d'un article de securite | |
EP2600213B1 (fr) | Procédé de formation d'un hologramme synthétique dans une image tramée | |
FR2963903A1 (fr) | Dispositif multicanal optiquement variable | |
WO2017114801A1 (fr) | Article securise comportant une image combinee et/ou une trame de revelation | |
WO2014041298A2 (fr) | Procédé d'authentification d'un élément de sécurité par superposition de n images partagées en couleur et élément de sécurité mettant en oeuvre ce procédé | |
WO2019175514A1 (fr) | Document apte a generer une image couleur | |
CA3127576A1 (fr) | Ensemble constitue d'un reseau bidimensionnel de dispositifs micro-optiques et d'un reseau de micro-images, procede pour sa fabrication, et document de securite le comportant | |
FR3046109A1 (fr) | Article securise comportant une image combinee et/ou une trame de revelation | |
EP2718901B1 (fr) | Procede de fabrication d'une image iridescente, image obtenue et dispositif la comprenant, programme associe | |
CA2834978A1 (fr) | Procede de fabrication d'une image iridescente, image obtenue et dispositif la comprenant, programme associe | |
EP2705401A1 (fr) | Procédé de fabrication d'une image iridescente, image obtenue et dispositif la comprenant, programme associe | |
FR3078582A1 (fr) | Procede de construction d'une image de securite par multiplexage d'images en couleurs | |
WO2022263772A1 (fr) | Formation d'une image 3d a partir d'une structure lenticulaire | |
EP3967509B1 (fr) | Dispositif de securite pour un document d'identite et document d'identite comportant un tel dispositif de securite | |
EP3723995B1 (fr) | Ensemble constitue d'un dispositif de transparence complexe et d'au moins un reseau de micro-images, ainsi que document de securite le comportant | |
EP3068627A1 (fr) | Procédé de personnalisation visuelle d'un document d'identité comportant une image latente | |
FR3142016A1 (fr) | Image variable à domaine de visibilité élargi | |
EP4295191A1 (fr) | Écran d'affichage autostéréoscopique à p points-de-vue destiné à afficher une image autostéréoscopique à i points-de-vue et dispositif d'affichage comprenant un tel écran | |
FR2974651A1 (fr) | Procede d'authentification unitaire d'un objet materiel au moyen d'un algorithme de cryptographie visuelle et d'une signature matiere | |
FR3142013A3 (fr) | Image variable à domaine de visibilité élargi | |
FR3105085A1 (fr) | Dispositif micro-optique | |
FR3030362A1 (fr) | Dispositif de securite |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12731134 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2834978 Country of ref document: CA Ref document number: 2014508867 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012731134 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14115243 Country of ref document: US |