EP1009982A1 - Device for colour coding digital images of fluorescent objects - Google Patents
Device for colour coding digital images of fluorescent objectsInfo
- Publication number
- EP1009982A1 EP1009982A1 EP99929430A EP99929430A EP1009982A1 EP 1009982 A1 EP1009982 A1 EP 1009982A1 EP 99929430 A EP99929430 A EP 99929430A EP 99929430 A EP99929430 A EP 99929430A EP 1009982 A1 EP1009982 A1 EP 1009982A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluorescent
- digital images
- scanner
- coding digital
- strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000000694 effects Effects 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000005060 rubber Substances 0.000 claims description 2
- 239000004753 textile Substances 0.000 claims description 2
- 239000002966 varnish Substances 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J2003/468—Measurement of colour; Colour measuring devices, e.g. colorimeters of objects containing fluorescent agent
Definitions
- the present invention relates to table scanners which are used to determine either the shape, the surface condition or the color of flat objects, this by digital coding of their image once it has been transmitted and then recorded on computer.
- the digital coding of images of flat objects by scanning on a computer-assisted table scanner is a technique commonly used to measure the color of various industrial products such as wood, rubbers, plastics, textiles, metals, paints, varnishes and others. , in the visible part of the electromagnetic spectrum.
- the method generally consists in scanning the surface of a flat object using a linear source of white light while an electronic photodetector and an analog / digital converter transform all the light signals coming from the object into an image. digital color, transferable to computer. User software then allows coding in the RGB trichromatic system (red, green, blue) of each of the points of said image, which leads to determining the exact chromatic composition.
- RGB trichromatic system red, green, blue
- the object of the present invention is a device resulting from the simple transformation of a traditional table color scanner into a scanner which can transmit to a specialized computer the image of an object which becomes fluorescent under ultraviolet excitation, this in order to allow to measure the intensity of said fluorescence.
- This transformation is carried out by first replacing the original white light source with an ultraviolet tubular lamp emitting between 300 and 380nm. For this exchange of lamps to be necessary, it is not enough for the scanner to operate in its new fluorescent mode. Indeed, during the initialization of a scan which a white lamp must carry out over the entire surface of an object to be scanned, the color photodetector immediately carries out the reference white as it results from the reflection of white light on a white reflective strip placed in the frame of the scanner, near the light source and just opposite the photodetector. However, in the case where the scanning must be done by an ultraviolet lamp, the reflective white band remains dark under UV radiation. The photodetector then reacts as if the light source were defective or absent, thus preventing any initialization of the scanning.
- the white reflective strip is replaced by a strip which, under the effect of ultraviolet radiation, becomes strongly fluorescent in the visible. It is placed in place of the white reflective strip of a traditional scanner, near the ultraviolet tubular lamp and in front of the detector when the latter is in its position. before initializing the scan. The photodetector then recognizes the fluorescent reflective strip as a new reference white and can thus proceed with the addition of the white, then with the initialization of the scanning leading to the capture of the image by computer.
- the third essential element for the proper functioning of the device is that it must be provided with a cover whose face which is in contact with the object to be scanned is reflective but not luminescent. In this way, all of the light emanating from the fluorescent object illuminates it and makes it possible to form a distinct and luminous image standing out from the background.
- the new device is able to transmit to a computer a digital image of any flat fluorescent object, this in the color corresponding to the wavelength of the light emitted exclusively by said object.
- the relative intensity of this fluorescence is often an indication of the degree of deterioration of such products, one can take advantage of the fact that the digital color coding of the images obtained by the device allows the intensity of the fluorescence to be measured. It is thus possible to quantitatively assess certain chemical properties of the products examined, provided that these are revealed by the fluorescence effect.
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
The invention concerns a device for colour coding digital images of fluorescent objects on a computer-aided table scanner. The device consists of a colour scanner provided with an ultraviolet lamp as light source, a reflecting band highly fluorescent in the visible as auxiliary reference white and a cover whereof the surface in contact with the measured object is reflecting but not fluorescent.
Description
[Dispositif permettant le codage en couleurs des images numériques d'objets fluorescents1[Device for color coding of digital images of fluorescent objects1
La présente invention concerne les scanneurs de table dont on se sert pour déterminer soit la forme, soit l'état de surface, soit encore la couleur d'objets plats, ceci par codage numérique de leur image une fois celle-ci transmise puis enregistrée sur ordinateur.The present invention relates to table scanners which are used to determine either the shape, the surface condition or the color of flat objects, this by digital coding of their image once it has been transmitted and then recorded on computer.
Le codage numérique d'images d'objets plats par balayage sur scanneur de table assisté par ordinateur est une technique couramment utilisée pour mesurer la couleur de produits industriels divers tels que bois, caoutchoucs, matières plastiques, textiles, métaux, peintures, vernis et autres, dans la partie visible du spectre électromagnétique.The digital coding of images of flat objects by scanning on a computer-assisted table scanner is a technique commonly used to measure the color of various industrial products such as wood, rubbers, plastics, textiles, metals, paints, varnishes and others. , in the visible part of the electromagnetic spectrum.
La méthode consiste généralement à balayer la surface d'un objet plat au moyen d'une source linéaire de lumière blanche tandis qu'un photodétecteur électronique et un convertisseur analogique/numérique transforment l'ensemble des signaux lumineux provenant de l'objet en une image numérique en couleurs, transférable sur ordinateur. Un logiciel utilisateur permet ensuite un codage dans le système trichromatique RVB (rouge, vert, bleu) , de chacun des points de ladite image ce qui conduit à en déterminer la composition chromatique exacte.The method generally consists in scanning the surface of a flat object using a linear source of white light while an electronic photodetector and an analog / digital converter transform all the light signals coming from the object into an image. digital color, transferable to computer. User software then allows coding in the RGB trichromatic system (red, green, blue) of each of the points of said image, which leads to determining the exact chromatic composition.
Cependant, comme tous les scanneurs de table sans exception, sont équipés exclusivement d'une source de lumière blanche, seule peut être déterminée par cette méthode la couleur d'objets susceptibles de transmettre, par diffusion ou réflexion, cette même lumière blanche au système de détection de l'appareil. Or il est une foule de produits dont une des principales propriétés est qu'ils deviennent fluorescents dans le visible lorsqu•exposés à la lumière ultraviolette. Jusqu'à présent, une image numérique de tels
objets plats dont on désire simplement détecter les propriétés fluorescentes ne pouvait être obtenue que par prise de vue par vidéocaméras ou par photocopie UV.However, like all table scanners without exception, are exclusively equipped with a white light source, only the color of objects capable of transmitting, by diffusion or reflection, this same white light can be determined by this method to the system of device detection. However, there are a host of products, one of the main properties of which is that they become fluorescent in the visible when exposed to ultraviolet light. So far, a digital image of such flat objects whose fluorescent properties one simply wishes to detect could only be obtained by shooting by videocameras or by UV photocopying.
L'objet de la présente invention est un dispositif résultant de la simple transformation d'un scanneur couleurs de table traditionnel en un scanneur pouvant transmettre à un ordinateur spécialisé l'image d'un objet qui devient fluorescent sous excitation ultraviolette, ceci afin de permettre de mesurer l'intensité ladite fluorescence.The object of the present invention is a device resulting from the simple transformation of a traditional table color scanner into a scanner which can transmit to a specialized computer the image of an object which becomes fluorescent under ultraviolet excitation, this in order to allow to measure the intensity of said fluorescence.
On effectue cette transformation en remplaçant dabord la source linéaire de lumière blanche d'origine par une lampe tubulaire ultraviolette émettant entre 300 et 380nm. Pour nécessaire que soit cet échange de lampe, il n'est pas suffisant pour que le scanneur fonctionne dans son nouveau mode fluorescent. En effet, lors de l'initialisation d'un balayage que doit effectuer une lampe blanche sur toute la surface d'un objet à scanner, le photodétecteur couleurs effectue d'emblée 1 'appointernent du blanc de référence tel qu'il résulte de la réflexion de la lumière blanche sur une bande réfléchissante blanche disposée dans le châssis du scanneur, à proximité de la source lumineuse et juste en face du photodétecteur. Or, dans le cas où le balayage doit se faire par une lampe ultraviolette, la bande blanche réfléchissante demeure obscure sous le rayonnement UV. Le photodétecteur réagit alors comme si la source lumineuse était défectueuse ou absente, interdisant ainsi toute initialisation du balayage.This transformation is carried out by first replacing the original white light source with an ultraviolet tubular lamp emitting between 300 and 380nm. For this exchange of lamps to be necessary, it is not enough for the scanner to operate in its new fluorescent mode. Indeed, during the initialization of a scan which a white lamp must carry out over the entire surface of an object to be scanned, the color photodetector immediately carries out the reference white as it results from the reflection of white light on a white reflective strip placed in the frame of the scanner, near the light source and just opposite the photodetector. However, in the case where the scanning must be done by an ultraviolet lamp, the reflective white band remains dark under UV radiation. The photodetector then reacts as if the light source were defective or absent, thus preventing any initialization of the scanning.
Pour contrecarrer cette interdiction, on remplace la bande réfléchissante blanche par une bande qui, sous l'effet du rayonnement ultraviolet, devient fortement fluorescente dans le visible. On la dispose à la place de la bande réfléchissante blanche d'un scanneur traditionnel, près de la lampe tubulaire ultraviolette et en face du détecteur lorsque celui-ci se trouve dans sa position d• appointement
avant l'initialisation du balayage. Le photodétecteur reconnaît alors la bande réfléchissante fluorescente comme un nouveau blanc de référence et peut procéder ainsi à 1 'appointe ent du blanc, puis à l'initialisation du balayage conduisant à la saisie de l'image par ordinateur.To counter this prohibition, the white reflective strip is replaced by a strip which, under the effect of ultraviolet radiation, becomes strongly fluorescent in the visible. It is placed in place of the white reflective strip of a traditional scanner, near the ultraviolet tubular lamp and in front of the detector when the latter is in its position. before initializing the scan. The photodetector then recognizes the fluorescent reflective strip as a new reference white and can thus proceed with the addition of the white, then with the initialization of the scanning leading to the capture of the image by computer.
Le troisième élément essentiel au bon fonctionnement du dispositif est que celui-ci doit être muni d'un couvercle dont la face qui est en contact avec l'objet à scanner est réfléchissante mais non luminescente. De cette façon, la totalité de la lumière émanant de l'objet fluorescent illumine celui-ci et permettre d'en former une image distincte et lumineuse se détachant de l'arrière plan.The third essential element for the proper functioning of the device is that it must be provided with a cover whose face which is in contact with the object to be scanned is reflective but not luminescent. In this way, all of the light emanating from the fluorescent object illuminates it and makes it possible to form a distinct and luminous image standing out from the background.
Ainsi équipé, le nouveau dispositif est en mesure de transmettre à un ordinateur une image numérique d'un quelconque objet plat fluorescent, ceci dans la couleur correspondant à la longueur d'onde de la lumière émise exclusivement par ledit objet. Il en résulte la possibilité d'archiver sur ordinateur un grand nombre d'images de produits industriels divers dont la fluorescence est souvent indicative d'un défaut de qualité ou d'un quelconque changement de propriétés. Comme l'intensité relative de cette fluorescence est souvent une indication du degré de détérioration de tels produits, on peut tirer profit du fait que le codage numérique en couleurs des images obtenues par le dispositif permet la mesure de l'intensité de la fluorescence. On peut ainsi apprécier quantitativement certaines propriétés chimiques des produits examinés pour autant que celles-ci soient révélées par l'effet de fluorescence.
Thus equipped, the new device is able to transmit to a computer a digital image of any flat fluorescent object, this in the color corresponding to the wavelength of the light emitted exclusively by said object. This results in the possibility of archiving on a computer a large number of images of various industrial products whose fluorescence is often indicative of a quality defect or any change in properties. As the relative intensity of this fluorescence is often an indication of the degree of deterioration of such products, one can take advantage of the fact that the digital color coding of the images obtained by the device allows the intensity of the fluorescence to be measured. It is thus possible to quantitatively assess certain chemical properties of the products examined, provided that these are revealed by the fluorescence effect.
Claims
1. Un dispositif permettant le codage en couleurs des images numériques d'objets fluorescents tels que bois, caoutchoucs, matières plastiques, textiles, métaux, peintures, vernis et autres afin d'en mesurer l'intensité de fluorescence, constitué d'un scanneur de table ayant comme source de lumière une lampe ultraviolette émettant entre 300 et 380nm.1. A device for color coding digital images of fluorescent objects such as wood, rubbers, plastics, textiles, metals, paints, varnishes and others in order to measure the intensity of fluorescence, consisting of a scanner table lamp having as a light an ultraviolet lamp emitting between 300 and 380nm.
2. Un dispositif selon la revendication 1 caractérisé par le fait qu'on utilise comme couleur de référence du dispositif une bande réfléchissante qui, sous l'effet de rayons ultraviolets, devient fortement fluorescente dans le visible. Cette bande est disposée près de la lampe ultraviolette et en vue du photodétecteur lorsque celui- ci se trouve dans sa position d'appointernent avant l'initialisation du balayage.2. A device according to claim 1 characterized in that a reference strip of the device is used as a reflective strip which, under the effect of ultraviolet rays, becomes strongly fluorescent in the visible. This strip is placed near the ultraviolet lamp and in view of the photodetector when the latter is in its back-up position before the scanning is initialized.
3. Un dispositif selon les revendications 1 et 2 caractérisé par le fait que la face intérieure du couvercle du scanneur est revêtue d'un matériau réfléchisant mais non fluorescent.
3. A device according to claims 1 and 2 characterized in that the inner face of the scanner cover is coated with a reflective material but not fluorescent.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9808618A FR2780783B1 (en) | 1998-07-06 | 1998-07-06 | DEVICE FOR COLOR CODING OF DIGITAL IMAGES OF FLUORESCENT OBJECTS |
| FR9808618 | 1998-07-06 | ||
| PCT/FR1999/001648 WO2000002024A1 (en) | 1998-07-06 | 1999-07-05 | Device for colour coding digital images of fluorescent objects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1009982A1 true EP1009982A1 (en) | 2000-06-21 |
Family
ID=9528299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99929430A Withdrawn EP1009982A1 (en) | 1998-07-06 | 1999-07-05 | Device for colour coding digital images of fluorescent objects |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1009982A1 (en) |
| AU (1) | AU4625099A (en) |
| FR (1) | FR2780783B1 (en) |
| WO (1) | WO2000002024A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3242447C2 (en) * | 1982-11-16 | 1986-01-23 | Sophokles 8062 Markt Indersdorf Papaioannou | Photoelectric control device for quality control of a moving material web |
| US5225900A (en) * | 1990-12-31 | 1993-07-06 | Xerox Corporation | Method of storing information within a reproduction system |
| EP0594444B1 (en) * | 1992-10-23 | 1999-02-17 | Canon Kabushiki Kaisha | Image reading apparatus and method for discriminating specific originals |
-
1998
- 1998-07-06 FR FR9808618A patent/FR2780783B1/en not_active Expired - Fee Related
-
1999
- 1999-07-05 AU AU46250/99A patent/AU4625099A/en not_active Abandoned
- 1999-07-05 WO PCT/FR1999/001648 patent/WO2000002024A1/en not_active Application Discontinuation
- 1999-07-05 EP EP99929430A patent/EP1009982A1/en not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0002024A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2780783B1 (en) | 2001-01-19 |
| WO2000002024A1 (en) | 2000-01-13 |
| FR2780783A1 (en) | 2000-01-07 |
| AU4625099A (en) | 2000-01-24 |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
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| 17Q | First examination report despatched |
Effective date: 20031006 |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 18D | Application deemed to be withdrawn |
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