EP1526925B1 - Mail-sorting installation comprising a colour reading head with two cameras - Google Patents
Mail-sorting installation comprising a colour reading head with two cameras Download PDFInfo
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- EP1526925B1 EP1526925B1 EP03753634A EP03753634A EP1526925B1 EP 1526925 B1 EP1526925 B1 EP 1526925B1 EP 03753634 A EP03753634 A EP 03753634A EP 03753634 A EP03753634 A EP 03753634A EP 1526925 B1 EP1526925 B1 EP 1526925B1
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- read head
- postal
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- 238000009434 installation Methods 0.000 title claims abstract description 6
- 230000004907 flux Effects 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 description 6
- 238000000926 separation method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012015 optical character recognition Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C3/00—Sorting according to destination
- B07C3/10—Apparatus characterised by the means used for detection ofthe destination
- B07C3/14—Apparatus characterised by the means used for detection ofthe destination using light-responsive detecting means
Definitions
- the invention relates to a read head for acquiring digital images of postal objects in a postal sorting facility, said read head comprising a high resolution multilevel gray camera.
- the invention is more particularly intended for a postal sorting facility in which postal objects are processed by video coding for an operator to enter the recipient address from the digital image of the object which is displayed on a screen from his video coding station.
- the digital images are generally transmitted in real time from a computerized management system of the sorting facility to the video coding station through a computer network. Given the processing rates, the digital images must have a low weight otherwise it is not possible to videocode the postal objects in real time.
- the weight of the images is restricted by limiting their resolution and / or their color palette.
- the images acquired are high resolution gray multilevel images because the high resolution color image size is not compatible with the transfer rates of the current computer networks.
- the images displayed on the screen of the video coding station are currently in multilevel gray, which reduces the efficiency of the operator and his comfort of work.
- a read head for acquiring digital images of postal objects in a postal sorting facility, including a high resolution gray multilevel camera and a low resolution color acquisition camera.
- the two cameras are arranged in the read head so as to provide two separately acquired and superimposable digital images of each mailpiece.
- the object of the invention is to propose a reading head as defined above, with which the superposability of the digital images acquired separately is improved.
- the subject of the invention is a reading head for acquiring digital images of postal objects in a postal sorting installation, said reading head comprising a high resolution gray multilevel camera and a video camera. low-resolution color acquisition, said cameras being arranged in said reading head so as to simultaneously provide two separately acquired and superimposable digital images of each postal object, an observation window through which the two cameras each capture an image of each object postal, characterized in that it comprises an optical system for separating the luminous flux from the window to each camera so that the two cameras simultaneously capture the same object points with the same angle of view.
- a high resolution gray multilevel image and a low resolution color image are acquired simultaneously with the same angle of view for each postal object. Both images are transmitted to the video coding station where a high resolution color image of the postal object is displayed after combining the two received images.
- the invention thus makes it possible to propose a high-resolution color image by limiting the amount of additional data compared with the conventional high-resolution multilevel acquisition of gray.
- the high-resolution color image may also be used to improve the optical character recognition by facilitating the recognition of address blocks in the image of a postal object.
- This high resolution color image can also be used to facilitate automatic recognition of postage marks.
- the cameras are arranged at right angles in the read head, and a separating plate is disposed substantially at forty-five degrees with respect to each camera, so that the two cameras seize one and the same. point object.
- the two images can thus be acquired simultaneously by the same reading head and through the same observation window, which improves their superimposability.
- a read head 1 comprises a housing 2 which is a dark room with an observation window 2 'in front of which travel postal objects to photograph.
- a multilevel gray digital camera 3 high resolution is fixed to this housing being disposed facing the observation window 2 'to acquire a digital image of a postal object visible in this window.
- the read head 1 comprises another camera 4 which is a low resolution color camera.
- This low-resolution color camera 4 is arranged so as to simultaneously acquire another digital image of the postal fold superimposed on the image acquired by the multilevel gray camera 3.
- These two images, which are acquired separately, are intended to be combined, for example at the the video coding station to form a high resolution color image of the postal item, which will be detailed below.
- the two cameras 3 and 4 may for example face the observation window 2 'to provide substantially superimposable images. In the case where the two acquired images have too large a shift, digital processing of one of the two images can be implemented to correct this shift.
- the acquisition of two superimposable images in the read head with the same angle of view according to the invention can be ensured by using an optical system placed between the cameras and the observation window, this system being intended to separate in two the luminous flux coming from the window.
- the optical separation system used may for example be a separator cube or a fiber anamorphic.
- the selected optical separation system is a separator plate 5 disposed substantially forty-five degrees from the plane of the viewing window.
- the luminous flux F1 coming from the observation window is separated by this plate into two flows F2 and F3 oriented at right angles to one another. More particularly, a first half F2 of the luminous flux passes through the separating blade 5 to reach the objective of the high resolution multilevel gray camera 3 which is placed facing the observation window while being oriented at forty-five degrees relative to the separating blade.
- a second half F3 of the luminous flux is reflected by the separating plate 5 to be oriented parallel to the plane of the window 2 'to the low-resolution color camera 4 which is arranged at forty-five degrees with respect to the separating plate. As shown schematically in FIG.
- the camera 3 faces the observation window 2 'and the camera 4 is arranged parallel to the plane of this observation window, the separating plate 5 being arranged at forty-five degrees with respect to the plane of the window so as to form an angle of forty-five degrees with the axis of each of the cameras 3 and 4.
- the mechanical and optical imperfections of the target point that is the postal object thus affect in a strictly identical manner the multilevel camera of gray and the color camera. The superimposability of images from these cameras is thus improved, and the two images can be acquired simultaneously.
- Such a separator blade which is known per se is generally made of treated glass, and has the advantage of a very low cost compared to other optical systems possible.
- the intensity of the luminous fluxes F 2 and F 3 received by each camera is substantially half the intensity of the luminous flux F1 leaving the observation window.
- This lowering of the luminous intensity can advantageously be compensated by a larger opening of the diaphragm of each camera. Another way to compensate for this lowering may be to increase the illumination of the postal item.
- the resolution of the color camera is much lower than the resolution of the multilevel camera of gray.
- the amount of data to be transmitted to form a high resolution color image on the video encoding screen is significantly reduced.
- the resolution of the color camera in number of points per unit length
- the weight of the image from the low resolution color camera is worth 18% of the weight of the multilevel image of high resolution gray.
- the amount of additional data to form a high resolution color image on the video coding screen is small compared to the high resolution multilevel acquisition of gray.
- the two images are superimposable, to a size factor, which means that they represent the same part of the postal object at different resolutions.
- a dot in the low-resolution color image corresponds to sixteen points in the multilevel high-resolution gray image.
- a representative flow chart of the combination processing of two images acquired by the read head to display a high resolution color image on the video coding station is shown very schematically.
- This treatment can for example be implemented by computerized means at a video coding station, or at the level of the computerized management system of the postal sorting facility.
- the data provided by the read head 1 comprises for each object two superimposable images which are submitted to a processing unit which may be a video coding station or the computerized management system of the postal sorting facility.
- a low resolution color image is acquired by the camera 4 in the RGB (Red Green Blue) format, which corresponds to the RGB-BR block of FIG. 2.
- a multilevel gray image is acquired by the camera 3, which corresponds to the block MNG-HR in Figure 2. Two options may then be considered.
- the RGB-BR image is transmitted to a processing unit in which it is converted into a representation called TSL (Hue Saturation Luminance).
- TSL Human Saturation Luminance
- the luminance layer of this image is not transmitted, which further reduces the amount of data in the color image.
- the converted color image whose luminance layer is not conserved is represented by the TS-BR block.
- the luminance component (L) of a point in a representation TSL corresponds to the value of the shade of gray in a multilevel image of gray.
- the multilevel gray image is directly a luminance image, which is represented by the L-HR block.
- the two images are then combined to form a high resolution image in the TSL format, which is represented by the TSL-HR block.
- this high-resolution color image is constructed by combining the luminance layer from the multilevel gray-scale high resolution image with the T and S (hue and saturation) layers that are derived from the low-resolution image from the camera 4. This combination is made possible by the fact that the two images are superimposable.
- the eye is very sensitive to luminance while it is less sensitive to saturation and hue in an image. Therefore, the subsampling (by low resolution acquisition) of the saturation and hue layers is without much loss to the human eye.
Abstract
Description
L'invention concerne une tête de lecture pour l'acquisition d'images numériques d'objets postaux dans une installation de tri postal, ladite tête de lecture comprenant une caméra multiniveaux de gris haute résolution. L'invention est plus particulièrement destinée à une installation de tri postal dans laquelle des objets postaux sont traités par vidéocodage pour qu'un opérateur saisisse l'adresse de destinataire à partir de l'image numérique de l'objet qui est affichée sur un écran de son poste de vidéocodage. Les images numériques sont généralement transmises en temps réel depuis un système de gestion informatisé de l'installation de tri vers le poste de vidéocodage à travers un réseau informatique. Compte tenu des débits de traitement, les images numériques doivent avoir un poids faible sans quoi il n'est pas possible de vidéocoder les objets postaux en temps réel.The invention relates to a read head for acquiring digital images of postal objects in a postal sorting facility, said read head comprising a high resolution multilevel gray camera. The invention is more particularly intended for a postal sorting facility in which postal objects are processed by video coding for an operator to enter the recipient address from the digital image of the object which is displayed on a screen from his video coding station. The digital images are generally transmitted in real time from a computerized management system of the sorting facility to the video coding station through a computer network. Given the processing rates, the digital images must have a low weight otherwise it is not possible to videocode the postal objects in real time.
Généralement, le poids des images est restreint par limitation de leur résolution et/ou de leur palette de couleurs. Classiquement, les images acquises sont des images multiniveaux de gris haute résolution car la taille d'images couleur haute résolution n'est pas compatible avec les débits de transfert des réseaux informatiques actuels. Les images affichées sur l'écran du poste de vidéocodage sont actuellement en multiniveaux de gris, ce qui réduit l'efficacité de l'opérateur et son confort de travail.Generally, the weight of the images is restricted by limiting their resolution and / or their color palette. Classically, the images acquired are high resolution gray multilevel images because the high resolution color image size is not compatible with the transfer rates of the current computer networks. The images displayed on the screen of the video coding station are currently in multilevel gray, which reduces the efficiency of the operator and his comfort of work.
Du document US―5912698, on connaît une tête de lecture pour l'acquisition d'images numériques d'objets postaux dans une installation de tri postal, comprenant une caméra multiniveaux de gris haute résolution et une caméra d'acquisition couleur basse résolution. Les deux caméras sont disposées dans la tête de lecture de manière à fournir deux images numériques acquises séparément et superposables de chaque objet postal.From US-5912698, a read head is known for acquiring digital images of postal objects in a postal sorting facility, including a high resolution gray multilevel camera and a low resolution color acquisition camera. The two cameras are arranged in the read head so as to provide two separately acquired and superimposable digital images of each mailpiece.
Le but de l'invention est de proposer une tête de lecture comme définie plus haut, avec laquelle on améliore la superposabilité des images numériques acquises séparément.The object of the invention is to propose a reading head as defined above, with which the superposability of the digital images acquired separately is improved.
A cet effet, l'invention a pour objet une tête de lecture pour l'acquisition d'images numériques d'objets postaux dans une installation de tri postal, ladite tête de lecture comprenant une caméra multiniveaux de gris haute résolution et une caméra d'acquisition couleur basse résolution, lesdites caméras étant disposées dans ladite tête de lecture de manière à fournir simultanément deux images numériques acquises séparément et superposables de chaque objet postal, une fenêtre d'observation à travers laquelle les deux caméras saisissent chacune une image de chaque objet postal, caractérisée en ce qu'elle comprend un système optique de séparation du flux lumineux provenant de la fenêtre vers chaque caméra pour que les deux caméras saisissent simultanément les mêmes points objets avec le même angle de vue.For this purpose, the subject of the invention is a reading head for acquiring digital images of postal objects in a postal sorting installation, said reading head comprising a high resolution gray multilevel camera and a video camera. low-resolution color acquisition, said cameras being arranged in said reading head so as to simultaneously provide two separately acquired and superimposable digital images of each postal object, an observation window through which the two cameras each capture an image of each object postal, characterized in that it comprises an optical system for separating the luminous flux from the window to each camera so that the two cameras simultaneously capture the same object points with the same angle of view.
Avec cette construction, une image multiniveaux de gris haute résolution et une image couleur basse résolution sont acquises simultanément avec le même angle de vue pour chaque objet postal. Les deux images sont transmises vers le poste de vidéocodage où une image couleur haute résolution de l'objet postal est affichée après combinaison des deux images reçues. L'invention permet ainsi de proposer une image couleur haute résolution en limitant la quantité de données supplémentaires par rapport à l'acquisition multiniveaux de gris haute résolution habituellement réalisée. Avantageusement, l'image couleur haute résolution pourra aussi être utilisée pour améliorer la reconnaissance optique de caractères en facilitant la reconnaissance de blocs adresse dans l'image d'un objet postal. Cette image couleur haute résolution pourra également être utilisée pour faciliter la reconnaissance automatique de marques d'affranchissement.With this construction, a high resolution gray multilevel image and a low resolution color image are acquired simultaneously with the same angle of view for each postal object. Both images are transmitted to the video coding station where a high resolution color image of the postal object is displayed after combining the two received images. The invention thus makes it possible to propose a high-resolution color image by limiting the amount of additional data compared with the conventional high-resolution multilevel acquisition of gray. Advantageously, the high-resolution color image may also be used to improve the optical character recognition by facilitating the recognition of address blocks in the image of a postal object. This high resolution color image can also be used to facilitate automatic recognition of postage marks.
Selon un mode de réalisation préféré de l'invention les caméras sont disposées à angle droit dans la tête de lecture, et une lame séparatrice est disposée sensiblement à quarante-cinq degrés par rapport à chaque caméra, de sorte que les deux caméras saisissent un même point objet. Les deux images peuvent ainsi être acquises simultanément par la même tête de lecture et à travers une même fenêtre d'observation, ce qui améliore leur superposabilité.According to a preferred embodiment of the invention the cameras are arranged at right angles in the read head, and a separating plate is disposed substantially at forty-five degrees with respect to each camera, so that the two cameras seize one and the same. point object. The two images can thus be acquired simultaneously by the same reading head and through the same observation window, which improves their superimposability.
L'invention sera maintenant décrite plus en détail, et en référence aux dessins annexés qui en illustrent une forme de réalisation à titre d'exemple non limitatif.
- La figure 1 est une représentation schématique d'une tête de lecture selon l'invention ;
- La figure 2 est une représentation sous forme d'organigramme de la combinaison de deux images pour former une image couleur haute résolution.
- Figure 1 is a schematic representation of a read head according to the invention;
- Fig. 2 is a flowchart representation of the combination of two images to form a high resolution color image.
Figure 1, une tête de lecture 1 comprend un boîtier 2 qui est une chambre noire avec une fenêtre d'observation 2' devant laquelle défilent des objets postaux à photographier. Une caméra numérique multiniveaux de gris 3 haute résolution est fixée à ce boîtier en étant disposée face à la fenêtre d'observation 2' pour acquérir une image numérique d'un objet postal visible dans cette fenêtre. Selon l'invention, la tête de lecture 1 comprend une autre caméra 4 qui est une caméra couleur basse résolution. Cette caméra couleur 4 basse résolution est disposée de manière à acquérir simultanément une autre image numérique du pli postal superposable à l'image acquise par la caméra multiniveaux de gris 3. Ces deux images qui sont acquises séparément sont destinées à être combinées par exemple au niveau du poste de vidéocodage pour former une image couleur haute résolution de l'objet postal, ce qui sera détaillé plus bas. Les deux caméras 3 et 4 pourront par exemple faire face à la fenêtre d'observation 2' pour fournir des images sensiblement superposables. Dans le cas où les deux images acquises présentent un décalage trop important, un traitement numérique de l'une des deux images pourra être mis en oeuvre pour corriger ce décalage.Figure 1, a
L'acquisition de deux images superposables dans la tête de lecture avec le même angle de vue selon l'invention pourra être assurée par utilisation d'un système optique placé entre les caméras et la fenêtre d'observation, ce système étant destiné à séparer en deux le flux lumineux provenant de la fenêtre. Le système optique de séparation utilisé pourra par exemple être un cube séparateur ou bien un anamorphoseur à fibre.The acquisition of two superimposable images in the read head with the same angle of view according to the invention can be ensured by using an optical system placed between the cameras and the observation window, this system being intended to separate in two the luminous flux coming from the window. The optical separation system used may for example be a separator cube or a fiber anamorphic.
Dans un mode de réalisation préféré, le système optique de séparation choisi est une lame séparatrice 5 disposée sensiblement à quarante-cinq degrés par rapport au plan de la fenêtre d'observation. Le flux lumineux F1 provenant de la fenêtre d'observation est séparé par cette lame en deux flux F2 et F3 orientés à angle droit l'un par rapport à l'autre. Plus particulièrement, une première moitié F2 du flux lumineux traverse la lame séparatrice 5 pour atteindre l'objectif de la caméra multiniveaux de gris 3 haute résolution qui est placée face à la fenêtre d'observation en étant orientée à quarante-cinq degré par rapport à la lame séparatrice. Une seconde moitié F3 du flux lumineux est reflétée par la lame séparatrice 5 pour être orientée parallèlement au plan de la fenêtre 2' vers la caméra couleur 4 basse résolution qui est disposée à quarante-cinq degrés par rapport à la lame séparatrice. Comme représenté schématiquement figure 1, la caméra 3 fait face à la fenêtre d'observation 2' et la caméra 4 est disposée parallèlement au plan de cette fenêtre d'observation, la lame séparatrice 5 étant disposée à quarante-cinq degrés par rapport au plan de la fenêtre de manière à former un angle de quarante-cinq degrés avec l'axe de chacune des caméras 3 et 4. Les imperfections mécaniques et optiques du point cible que constitue l'objet postal affectent ainsi de manière rigoureusement identique la caméra multiniveaux de gris et la caméra couleur. La superposabilité des images issues de ces caméras est ainsi améliorée, et les deux images peuvent être acquises simultanément. Une telle lame séparatrice qui est connue en soi est généralement faite de verre traité, et présente l'intérêt d'un coût très faible par rapport aux autres systèmes optiques possibles.In a preferred embodiment, the selected optical separation system is a separator plate 5 disposed substantially forty-five degrees from the plane of the viewing window. The luminous flux F1 coming from the observation window is separated by this plate into two flows F2 and F3 oriented at right angles to one another. More particularly, a first half F2 of the luminous flux passes through the separating blade 5 to reach the objective of the high resolution multilevel
Dans l'exemple illustré sur la figure 1, l'intensité des flux lumineux F2 et F3 reçus par chaque caméra vaut sensiblement la moitié de l'intensité du flux lumineux F1 sortant de la fenêtre d'observation. Cet abaissement d'intensité lumineuse pourra avantageusement être compensé par une ouverture plus grande du diaphragme de chaque caméra. Une autre façon de compenser cet abaissement peut consister à augmenter l'éclairage de l'objet postal.In the example illustrated in FIG. 1, the intensity of the
Avantageusement, la résolution de la caméra couleur est très inférieure à la résolution de la caméra multiniveaux de gris. De cette manière la quantité de données à transmettre pour former une image couleur haute résolution sur l'écran de vidéo codage est significativement réduite. A titre d'exemple, si la résolution de la caméra couleur (en nombre de points par unité de longueur) est quatre fois moindre que celle de la caméra multiniveaux de gris, le poids de l'image issue de la caméra couleur basse résolution vaut 18% du poids de l'image multiniveaux de gris haute résolution. Comme le montre cet exemple, la quantité de données supplémentaires pour former une image couleur haute résolution sur l'écran de vidéocodage est faible par rapport à l'acquisition haute résolution multiniveaux de gris.Advantageously, the resolution of the color camera is much lower than the resolution of the multilevel camera of gray. In this way the amount of data to be transmitted to form a high resolution color image on the video encoding screen is significantly reduced. For example, if the resolution of the color camera (in number of points per unit length) is four times less than that of the multilevel gray camera, the weight of the image from the low resolution color camera is worth 18% of the weight of the multilevel image of high resolution gray. As shown in this example, the amount of additional data to form a high resolution color image on the video coding screen is small compared to the high resolution multilevel acquisition of gray.
Plus particulièrement, les deux images sont superposables, à un facteur de taille près, ce qui signifie qu'elles représentent une même partie de l'objet postal à des résolutions différentes. Dans l'exemple ci-dessus, un point de l'image couleur basse résolution correspond à seize points de l'image multiniveaux de gris haute résolution.More particularly, the two images are superimposable, to a size factor, which means that they represent the same part of the postal object at different resolutions. In the above example, a dot in the low-resolution color image corresponds to sixteen points in the multilevel high-resolution gray image.
Figure 2, un organigramme représentatif du traitement de combinaison de deux images acquises par la tête de lecture pour afficher une image couleur haute résolution sur le poste de vidéocodage est représenté très schématiquement. Ce traitement pourra par exemple être mis en oeuvre par des moyens informatisés au niveau d'un poste de vidéocodage, ou au niveau du système de gestion informatisé de l'installation de tri postal.2, a representative flow chart of the combination processing of two images acquired by the read head to display a high resolution color image on the video coding station is shown very schematically. This treatment can for example be implemented by computerized means at a video coding station, or at the level of the computerized management system of the postal sorting facility.
Les données fournies par la tête de lecture 1 comprennent pour chaque objet deux images superposables qui sont soumises à une unité de traitement qui peut être un poste de vidéocodage ou bien le système de gestion informatisé de l'installation de tri postal. Une image couleur basse résolution est acquise par la caméra 4 au format RVB (Rouge Vert Bleu) ce qui correspond au bloc RVB-BR de la figure 2. Simultanément, une image multiniveaux de gris est acquise par la caméra 3 ce qui correspond au bloc MNG-HR de la figure 2. Deux options peuvent être alors envisagées. Dans un premier cas, l'image RVB-BR est transmise à une unité de traitement dans laquelle elle est convertie dans une représentation dite TSL (Teinte Saturation Luminance). Dans le deuxième cas, l'image RVB-BR est convertie dans une représentation TSL avant transmission. Dans ce cas, la couche de luminance de cette image n'est pas transmise, ce qui permet de réduire encore la quantité de données de l'image couleur. L'image couleur convertie dont la couche de luminance n'est pas conservée est représentée par le bloc TS-BR. Comme connu de l'état de la technique, la composante luminance (L) d'un point dans une représentation TSL correspond à la valeur de la nuance de gris dans une image multiniveaux de gris. L'image multiniveaux de gris est directement une image en luminance, ce qui est représenté par le bloc L-HR. Les deux images sont alors combinées pour former une image haute résolution dans le format TSL, ce qui est représenté par le bloc TSL-HR. Plus particulièrement, cette image haute résolution couleur est construite par combinaison de la couche de luminance issue de l'image haute résolution multiniveaux de gris, avec les couches T et S (teinte et saturation) qui sont issues de l'image basse résolution provenant de la caméra 4. Cette combinaison est rendue possible par le fait que les deux images sont superposables.The data provided by the read
Plus particulièrement, il est connu que l'oeil est très sensible à la luminance alors qu'il est moins sensible à la saturation et à la teinte dans une image. Par conséquent, le sous-échantillonage (par acquisition en basse résolution) des couches de saturation et de teinte est sans grande perte pour l'oeil humain.More particularly, it is known that the eye is very sensitive to luminance while it is less sensitive to saturation and hue in an image. Therefore, the subsampling (by low resolution acquisition) of the saturation and hue layers is without much loss to the human eye.
Claims (5)
- A read head (1) for acquiring digital images of postal objects in a postal sorting installation, said read head comprising a high-resolution camera (3) providing a multiple level gray scale and a low-resolution color camera (4), said cameras (3, 4) being disposed in said read head (1) so as to form simultaneously two separately acquired and superposable digital images of each postal item, said read head being provided with an observation window (2) through which each of the two cameras (3, 4) takes a respective image of each postal object, said read head being characterized in that it further comprises a light splitter system (5) for splitting the light flux from the window and directing it to each of the cameras so that both cameras simultaneously take images of the same object points from the same viewing angle.
- A read head according to claim 1, in which the splitter device is a splitter plate (5) made of treated glass.
- A read head according to claim 2, in which said splitter plate is disposed at 45° relative to the plane of the window (2') and in which each camera (3, 4) is disposed at substantially 45° relative to said splitter plate (5).
- A postal sorting installation including a read head according to any one of claims 1 to 3, and a processing unit which, for each postal object, combines the high-resolution gray scale image with the low-resolution color image delivered by the read head (1) for forming a high-resolution color image.
- The use of an "HSL" representation in an installation according to claim 4 for transmitting said images from said read head to said processing unit.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0208740A FR2842383B1 (en) | 2002-07-11 | 2002-07-11 | POSTAL SORTING SYSTEM COMPRISING A COLOR READING HEAD WITH TWO CAMERAS |
FR0208740 | 2002-07-11 | ||
PCT/FR2003/002182 WO2004007101A2 (en) | 2002-07-11 | 2003-07-10 | Mail-sorting installation comprising a colour reading head with two cameras |
Publications (2)
Publication Number | Publication Date |
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EP1526925A2 EP1526925A2 (en) | 2005-05-04 |
EP1526925B1 true EP1526925B1 (en) | 2006-11-15 |
Family
ID=29763746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03753634A Expired - Lifetime EP1526925B1 (en) | 2002-07-11 | 2003-07-10 | Mail-sorting installation comprising a colour reading head with two cameras |
Country Status (10)
Country | Link |
---|---|
US (1) | US7388600B2 (en) |
EP (1) | EP1526925B1 (en) |
JP (1) | JP4459809B2 (en) |
AT (1) | ATE345177T1 (en) |
AU (1) | AU2003271800A1 (en) |
CA (1) | CA2487374C (en) |
DE (1) | DE60309716T2 (en) |
ES (1) | ES2271632T3 (en) |
FR (1) | FR2842383B1 (en) |
WO (1) | WO2004007101A2 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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US7809158B2 (en) * | 2005-05-02 | 2010-10-05 | Siemens Industry, Inc. | Method and apparatus for detecting doubles in a singulated stream of flat articles |
KR101531709B1 (en) | 2008-10-17 | 2015-07-06 | 삼성전자 주식회사 | Image processing apparatus for generating high sensitive color image and method thereof |
US10176452B2 (en) | 2014-06-13 | 2019-01-08 | Conduent Business Services Llc | Store shelf imaging system and method |
US9542746B2 (en) | 2014-06-13 | 2017-01-10 | Xerox Corporation | Method and system for spatial characterization of an imaging system |
US9659204B2 (en) | 2014-06-13 | 2017-05-23 | Conduent Business Services, Llc | Image processing methods and systems for barcode and/or product label recognition |
US10453046B2 (en) * | 2014-06-13 | 2019-10-22 | Conduent Business Services, Llc | Store shelf imaging system |
US9928438B2 (en) | 2016-03-10 | 2018-03-27 | Conduent Business Services, Llc | High accuracy localization system and method for retail store profiling via product image recognition and its corresponding dimension database |
US10289990B2 (en) | 2016-10-17 | 2019-05-14 | Conduent Business Services, Llc | Store shelf imaging system and method |
US10019803B2 (en) | 2016-10-17 | 2018-07-10 | Conduent Business Services, Llc | Store shelf imaging system and method using a vertical LIDAR |
US10210603B2 (en) | 2016-10-17 | 2019-02-19 | Conduent Business Services Llc | Store shelf imaging system and method |
US10002344B2 (en) | 2016-10-17 | 2018-06-19 | Conduent Business Services, Llc | System and method for retail store promotional price tag detection |
US20200137380A1 (en) * | 2018-10-31 | 2020-04-30 | Intel Corporation | Multi-plane display image synthesis mechanism |
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CA2089332A1 (en) * | 1992-03-12 | 1993-09-13 | Robert Bishop | Method of and apparatus for object or surface inspection employing multicolor reflection discrimination |
DE19532842C1 (en) * | 1995-09-05 | 1996-12-19 | Ibm | Image acquisition system for automatic reading of postal addresses |
US6303889B1 (en) * | 2000-02-15 | 2001-10-16 | Opex Corporation | Method and apparatus for sorting documents into a pre-defined sequence |
FR2812226B1 (en) * | 2000-07-25 | 2002-12-13 | Mannesmann Dematic Postal Automation Sa | PROCESS FOR PROCESSING LARGE POSTAL OBJECTS IN A SORTING INSTALLATION |
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DE60309716D1 (en) | 2006-12-28 |
WO2004007101A3 (en) | 2004-04-08 |
DE60309716T2 (en) | 2007-09-20 |
AU2003271800A1 (en) | 2004-02-02 |
ATE345177T1 (en) | 2006-12-15 |
US7388600B2 (en) | 2008-06-17 |
WO2004007101A2 (en) | 2004-01-22 |
FR2842383A1 (en) | 2004-01-16 |
US20040233278A1 (en) | 2004-11-25 |
EP1526925A2 (en) | 2005-05-04 |
FR2842383B1 (en) | 2004-12-03 |
CA2487374C (en) | 2008-12-23 |
JP2005537123A (en) | 2005-12-08 |
CA2487374A1 (en) | 2004-01-22 |
JP4459809B2 (en) | 2010-04-28 |
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