EP2382607A2 - Bus camera - Google Patents

Bus camera

Info

Publication number
EP2382607A2
EP2382607A2 EP09815419A EP09815419A EP2382607A2 EP 2382607 A2 EP2382607 A2 EP 2382607A2 EP 09815419 A EP09815419 A EP 09815419A EP 09815419 A EP09815419 A EP 09815419A EP 2382607 A2 EP2382607 A2 EP 2382607A2
Authority
EP
European Patent Office
Prior art keywords
camera
wide
attachment
angle
space
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.)
Granted
Application number
EP09815419A
Other languages
German (de)
French (fr)
Other versions
EP2382607B1 (en
Inventor
Ralf Hinkel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mobotix AG
Original Assignee
Mobotix AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mobotix AG filed Critical Mobotix AG
Publication of EP2382607A2 publication Critical patent/EP2382607A2/en
Application granted granted Critical
Publication of EP2382607B1 publication Critical patent/EP2382607B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19639—Details of the system layout
    • G08B13/19647—Systems specially adapted for intrusion detection in or around a vehicle
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19617—Surveillance camera constructional details
    • G08B13/19626—Surveillance camera constructional details optical details, e.g. lenses, mirrors or multiple lenses
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19617—Surveillance camera constructional details
    • G08B13/19626—Surveillance camera constructional details optical details, e.g. lenses, mirrors or multiple lenses
    • G08B13/19628—Surveillance camera constructional details optical details, e.g. lenses, mirrors or multiple lenses of wide angled cameras and camera groups, e.g. omni-directional cameras, fish eye, single units having multiple cameras achieving a wide angle view

Definitions

  • the present invention relates to the preamble claimed and thus relates to camera arrangements and methods for image acquisition.
  • the object of the present invention is to provide new products for commercial use.
  • the invention thus proposes that it is provided in a camera arrangement with at least one wide-angle camera for monitoring an elongated space and an attachment for the camera, that the attachment is adapted to the (digital) wide-angle camera with a field of view low distortion to far away and with To direct a viewing area with higher distortion on closer parts of the room.
  • the attachment is designed such that the optical axis of the wide-angle camera is directed to a far-away region, typically the end of the room. Since typically the image quality of a camera along the optical axis is best, it is achieved in such a way that the described effects are optimally realized.
  • the wide angle will typically have significantly over 90 ° viewing angle, preferably 180 ° or nearly 180 °.
  • two wide angle single cameras are provided back to back and the attachment for attachment is provided near the center of the elongated space area.
  • the two back-to-back cameras can, but need not, be aligned exactly on the same axis be.
  • a not exactly identical alignment is more advantageous, because then with less than 180 ° detecting lenses, a space detection even under the camera, possibly even with overlap is possible, which favors the creation of a seamless image of two individual images. This is disclosed as possible and preferred.
  • the image resolution of the walls of a gangway area is still at least slightly improved if the respective optical axis is not aligned exactly horizontally along a ceiling or the like, but is inclined downwards.
  • Fig. 2 shows an arrangement of a wide-angle camera in a bus according to the prior art.
  • a camera arrangement 1, generally designated 1 comprises at least one wide-angle camera 2a for monitoring an elongate space 3, and an attachment 4 for the camera, the attachment being designed to provide the wide-angle camera 2a with a low-distortion viewing area 5 far away room parts 3a and with a
  • the camera arrangement 1 is arranged centrally in the passage for continuous monitoring of a car interior in a train carrying passengers.
  • the attachment 4 is attached to a gangway, in such a way that two so far identical wide-angle cameras 2a, 2b are directed back to back on opposite ends of the aisle.
  • the camera 2b is, like the camera 2a, oriented in such a way that a low-distortion viewing region 5b is directed toward a remote spatial region 3b and a higher-distortion viewing region 6b is directed toward closer spatial parts.
  • the image quality is thus significantly better over the entire range than in the conventional arrangement of FIG. 2, in which a high imaging quality is obtained only near the camera in the only slightly distorted region.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Studio Devices (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

The invention relates to a camera arrangement having at least one wide-angle camera (2a, 2b) for monitoring an elongated space, and a mount (4) for the camera. The mount is thereby designed for setting up the wide-angle camera having a field of vision having less distortion (5b) for further distant parts of the space and having a field of vision having greater distortion for closer parts of the space.

Description

Buskamera bus camera
Beschreibungdescription
Die vorliegende Erfindung betrifft das Oberbegrifflieh Beanspruchte und bezieht sich somit auf Kameraanordnungen und Verfahren zur Bildaufnahme.The present invention relates to the preamble claimed and thus relates to camera arrangements and methods for image acquisition.
Kameraanordnungen sind bekannt und werden insbesondere bei der Überwachung eingesetzt. Dabei ist es einerseits wünschenswert, mit hoher Auflösung zu beobachten; andererseits ist es erwünscht, den apparativen Aufwand gering zu halten.Camera arrangements are known and are used in particular in the monitoring. On the one hand, it is desirable to observe with high resolution; On the other hand, it is desirable to keep the expenditure on equipment low.
Um mit hoher Auflösung zu beobachten, werden typisch eine große Vielzahl von Kameras vorgesehen, die jeweils unterschiedliche Bereiche überwachen. Dies hat aber den Nachteil, dass der apparative Aufwand für die Kameras, die Bildauf- Zeichnung, die Anzeige usw. hoch ist und die Anordnung durch die Mehrzahl an Stellen, an welchen die Kameras angeordnet sind, auffällig ist.In order to observe high resolution, typically a wide variety of cameras are provided, each monitoring different areas. However, this has the disadvantage that the expenditure on equipment for the cameras, the image recording, the display, etc. is high and the arrangement is conspicuous by the plurality of locations at which the cameras are arranged.
Wegen dieses hohen Aufwandes ist bereits vorgeschlagen wor- den, einen zu beobachtenden Raumbereich mit einer Weitwinkel - kamera zu erfassen, die typisch einen Sichtwinkel von 180° aufweist, das heißt hemisphärisch ist, und dann die aufgenommenen, durch das Weitwinkelobjektiv verzerrten Bilder wieder zu entzerren. Die Entzerralgorithmen sind per se bekannt. Die Kameras können an Decken angeordnet werden und fallen dadurch kaum auf. Problematisch ist diese Anordnung aber bei derBecause of this high expense, it has already been proposed to detect a region of space to be observed with a wide-angle camera, which typically has a viewing angle of 180 °, that is to say hemispherical, and then to deconstruct the recorded images distorted by the wide-angle objective , The equalization algorithms are known per se. The cameras can be placed on ceilings and are therefore hardly noticeable. However, this arrangement is problematic in the
- x - Überwachung von langgestreckten Gängen und dergleichen, wie Fluren, Bussen oder Zugabteilen, weil in den weit entfernten Randbereichen die Bildverzerrung hoch ist.- x - Monitoring of elongated corridors and the like, such as corridors, buses or train compartments, because in the far edge areas the image distortion is high.
Es wäre wünschenswert, eine Überwachungsmöglichkeit anzugeben, die trotz Rundumüberwachung auch in langgestreckten Räumen eine in allen Bereichen gute Bildqualität ergibt.It would be desirable to provide a monitoring option that gives a good picture quality in all areas despite all-round monitoring even in elongated rooms.
Die Aufgabe der vorliegenden Erfindung besteht darin, Neues für die gewerbliche Anwendung bereitzustellen.The object of the present invention is to provide new products for commercial use.
Die Lösung dieser Aufgabe wird in unabhängiger Form beansprucht; bevorzugte Ausführungsformen finden sich in den Unteransprüchen .The solution to this problem is claimed in an independent form; preferred embodiments can be found in the subclaims.
Die Erfindung schlägt somit vor, dass bei einer Kameraanordnung mit zumindest einer Weitwinkelkamera zur Überwachung eines langgestreckten Raumes und einer Anbringung für die Kamera vorgesehen ist, dass die Anbringung dazu ausgebildet ist, die (digitale) Weitwinkelkamera mit einem Sichtbereich geringer Verzerrung auf weit entfernte und mit einem Sichtbereich mit höherer Verzerrung auf näher gelegene Raumteile zu richten.The invention thus proposes that it is provided in a camera arrangement with at least one wide-angle camera for monitoring an elongated space and an attachment for the camera, that the attachment is adapted to the (digital) wide-angle camera with a field of view low distortion to far away and with To direct a viewing area with higher distortion on closer parts of the room.
Damit wird ausgenutzt, dass für die weit entfernten Raumteile, für die auch große Objekte nur mit einem kleinen Winkel - abstand erfasst werden, nicht das Erfordernis besteht, diese auch noch zu entzerren, während bei nahen Raumbereichen, in denen Objekte stets mit großem Winkelabstand erfasst werden, eine Entzerrung vorgenommen wird. Da dasselbe Objekte in der Nähe einen größeren Sichtwinkel einnimmt, wird es mit einer noch vergleichsweise großen Zahl Pixel aufgenommen, auch wenn es nur im stark verzerrten Randbereich der Weitwinkelkamera erfasst wird. Damit besteht aber die Möglichkeit, bei der Entzerrung der Aufnahme eine noch gute Bildqualität zu erhalten.This makes use of the fact that for the distant parts of the room, for which even large objects are only detected with a small angular separation, there is no need to equalize them, whereas in the case of near spatial areas, where objects always cover with large angular distances be done, an equalization is made. Since the same nearby objects occupy a larger viewing angle, it is captured with even a relatively large number of pixels, even though it is detected only in the strongly distorted edge area of the wide-angle camera. But there is the possibility to get a still good image quality in the equalization of the recording.
Insgesamt wird damit für entfernte Bereiche, in welchen die Objekte unter nur kleinem Winkelabstand erfasst werden, eine gute optische Abbildungsqualität bereitgestellt, während für nahe Objekte, die unter großem Winkelabstand mit vielen BiId- pixeln erfasst werden, die durch die Vielzahl an Bildpunkten verbesserte Entzerrbarkeit genutzt wird. Es lassen sich so insgesamt höhere und vor allem für alle Raumbereiche gleichmäßigere Bildqualität erzielen, was gerade in langgestreckten Räumen die Sicherheit bei geringstmöglichem Aufwand erhöht.Overall, a good optical image quality is thus provided for distant regions in which the objects are detected at only small angular separation, while for near objects which are detected at large angular distances with many image pixels, the improved equalizability due to the multiplicity of pixels is used becomes. It can thus be higher overall and especially for all areas achieve more even image quality, which increases safety in the least possible effort, especially in elongated rooms.
Es ist bevorzugt, wenn die Anbringung so gestaltet ist, dass die optische Achse der Weitwinkelkamera auf einen weit entfernten Bereich, typisch das Raumende, gerichtet ist. Da typisch die Bildqualität einer Kamera entlang der optischen Achse am besten ist, wird so erreicht, dass die beschriebenen Effekte in optimaler Weise verwirklicht werden.It is preferred if the attachment is designed such that the optical axis of the wide-angle camera is directed to a far-away region, typically the end of the room. Since typically the image quality of a camera along the optical axis is best, it is achieved in such a way that the described effects are optimally realized.
Der Weitwinkel wird typisch deutlich über 90° Sichtwinkel aufweisen, bevorzugt 180° oder nahezu 180°.The wide angle will typically have significantly over 90 ° viewing angle, preferably 180 ° or nearly 180 °.
Weiter ist es bevorzugt, wenn zwei Weitwinkel -Einzelkameras Rücken an Rücken vorgesehen und die Anbringung zur Befestigung nahe der Mitte des langgestreckten Raumbereiches vorgesehen ist. Damit kann eine besonders gute Überwachung erfol- gen, die auch in langgestreckten Räumen lückenlos ist. Die beiden Rücken an Rücken angeordneten Kameras können, müssen aber nicht , exakt auf ein und dieselbe Achse ausgerichtet sein. Eine nicht exakt identische Ausrichtung ist vorteilhafter, weil dann mit weniger als 180° erfassenden Objektiven eine Raumerfassung auch unter der Kamera, gegebenenfalls sogar mit Überlapp möglich ist, was die Erzeugung eines nahtlo- sen Bildes aus zwei Einzelbildern begünstigt. Diese sei als möglich und bevorzugt offenbart. Zugleich ist die Bild- Auflösung der Wände eines Gangbereiches noch zumindest geringfügig verbessert, wenn die jeweilige optisch Achse nicht exakt horizontal entlang einer Decke oder ähnliches ausge- richtet ist, sondern nach unten geneigt ist.Further, it is preferable if two wide angle single cameras are provided back to back and the attachment for attachment is provided near the center of the elongated space area. This makes it possible to achieve particularly good surveillance, which is seamless even in elongated rooms. The two back-to-back cameras can, but need not, be aligned exactly on the same axis be. A not exactly identical alignment is more advantageous, because then with less than 180 ° detecting lenses, a space detection even under the camera, possibly even with overlap is possible, which favors the creation of a seamless image of two individual images. This is disclosed as possible and preferred. At the same time, the image resolution of the walls of a gangway area is still at least slightly improved if the respective optical axis is not aligned exactly horizontally along a ceiling or the like, but is inclined downwards.
Die Erfindung wird im Folgenden nur beispielsweise anhand der Zeichnung beschrieben. In dieser ist dargestellt durch:The invention will now be described by way of example only with reference to the drawings. In this is represented by:
Fig. 1 ein Ausführungsbeispiel der vorliegenden Erfindung,1 shows an embodiment of the present invention,
Fig. 2 eine Anordnung einer Weitwinkelkamera in einem Bus nach dem Stand der Technik.Fig. 2 shows an arrangement of a wide-angle camera in a bus according to the prior art.
Nach Fig. 1 umfasst eine allgemein mit 1 bezeichnete Kameraanordnung 1 zumindest eine Weitwinkelkamera 2a zur Überwachung eines langgestreckten Raumes 3, und eine Anbringung 4 für die Kamera, wobei die Anbringung dazu ausgebildet ist, die Weitwinkelkamera 2a mit einem Sichtbereich geringer Ver- zerrung 5 auf weit entfernte Raumteile 3a und mit einem1, a camera arrangement 1, generally designated 1, comprises at least one wide-angle camera 2a for monitoring an elongate space 3, and an attachment 4 for the camera, the attachment being designed to provide the wide-angle camera 2a with a low-distortion viewing area 5 far away room parts 3a and with a
Sichtbereich hoher Verzerrung 6 auf näher gelegene Raumbereiche zu richten.Viewing area of high distortion 6 to be directed to closer spatial areas.
Im vorliegenden Fall ist die Kameraanordnung 1 zur Dauerüber- wachung eines Wagoninneren in einem Reisende befördernden Zug mittig im Gang angeordnet. Die Anbringung 4 ist an einer Gangdecke angebracht, und zwar so, dass zwei insoweit identische Weitwinkelkameras 2a, 2b Rücken an Rücken auf gegenüberliegende Enden des Ganges gerichtet sind. Die Kamera 2b ist dabei genauso wie die Kamera 2a so ausgerichtet, dass ein Sichtbereich geringer Verzerrung 5b auf einen entfernt gelegenen Raumbereich 3b gerichtet ist und ein Sichtbereich 6b mit höherer Verzerrung auf näher gelegene Raumteile gerichtet ist.In the present case, the camera arrangement 1 is arranged centrally in the passage for continuous monitoring of a car interior in a train carrying passengers. The attachment 4 is attached to a gangway, in such a way that two so far identical wide-angle cameras 2a, 2b are directed back to back on opposite ends of the aisle. The camera 2b is, like the camera 2a, oriented in such a way that a low-distortion viewing region 5b is directed toward a remote spatial region 3b and a higher-distortion viewing region 6b is directed toward closer spatial parts.
Durch die Verwendung von Weitwinkelkameras ist auch unmittelbar unterhalb der Anbringung 4 eine Beobachtung des Ganges möglich. Die nur schematische Zeichnung ist in soweit nicht exakt. Damit ergibt sich zunächst ein Erfassen des gesamten langgestreckten Ganges des Waggons 3 wie im Stand der Tech- nik, bei welchem nur eine einzelne Weitwinkelkamera an der Decke angebracht ist, aber so, dass der Bereich schärfsten Sehens unmittelbar unter der Kamera angeordnet ist, wie bei A angedeutet, und die Bereiche B und C nur noch verzerrt aufgenommen werden.Through the use of wide-angle cameras, an observation of the aisle is also possible immediately below the attachment 4. The only schematic drawing is not accurate in so far. This results first of all in detecting the entire elongated passage of the wagon 3, as in the prior art, in which only a single wide-angle camera is mounted on the ceiling, but in such a way that the area of sharpest vision is located directly beneath the camera, as in FIG A indicated, and the areas B and C are recorded only distorted.
Mit der beschriebenen erfindungsgemäßen Kameraanordnung können nun im gesamten Gang Bilder von konstant hoher Qualität erhalten werden. In den entfernten Bereichen ist dies möglich, weil die Objekte zwar unter einem kleinen Winkelabstand beobachtet werden, was typisch auf einem Kamerasensor dazu führt, dass die Menge an für ein Objekt zur Verfügung stehenden Pixeln nicht besonders groß ist. In den Bereichen, in welchen die Objekte näher liegen, beispielsweise die Bereiche 6a oder 6b, werden die Objekte, wie beispielsweise Gesichter von Reisenden, unter einem größeren Winkelabstand beobachtet, sind jedoch verzerrt. Hier ist eine Entzerrung jedoch aufgrund der großen Menge zur Verfügung stehender Bildpunkte oh- ne weiteres möglich, so dass auch hier eine hohe Beobachtungsqualität erhalten wird.With the described camera arrangement according to the invention, images of consistently high quality can now be obtained throughout the passage. In the remote areas, this is possible because the objects are observed at a small angular distance, which typically results in a camera sensor that the amount of available pixels for an object is not very large. In the areas in which the objects are closer, for example the areas 6a or 6b, the objects, such as faces of travelers, are observed at a greater angular distance, but are distorted. However, due to the large amount of available pixels, equalization is not possible here. ne further possible, so that here too a high observation quality is obtained.
Die Bildqualität ist somit über den ganzen Bereich signifi- kant besser als bei der herkömmlichen Anordnung von Fig. 2, bei welcher lediglich nahe der Kamera im nur wenig verzerrten Bereich eine hohe Abbildungsqualität erhalten wird. The image quality is thus significantly better over the entire range than in the conventional arrangement of FIG. 2, in which a high imaging quality is obtained only near the camera in the only slightly distorted region.

Claims

Patentansprüche claims
1. Kameraanordnung mit zumindest einer Weitwinkelkamera zur Überwachung eines langgestreckten Raumes und einer Anbringung für die Kamera, dadurch gekennzeichnet, dass die Anbringung dazu ausgebildet ist, die Weitwinkelkamera mit einem Sichtbereich geringer Verzerrung auf weit entfernte und mit einem Sichtbereich mit höherer Verzerrung auf näher gelegene Raumteile zu richten.1. Camera arrangement with at least one wide-angle camera for monitoring an elongated space and an attachment for the camera, characterized in that the attachment is adapted to the wide-angle camera with a field of view low distortion to distant and with a field of view with higher distortion to closer parts of space to judge.
2. Kameraanordnung nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die Anbringung so gestaltet ist, dass die optische Achse der Weitwinkelkamera auf einen weit entfernten Bereich gerichtet ist.2. Camera arrangement according to the preceding claim, characterized in that the attachment is designed so that the optical axis of the wide-angle camera is directed to a far-away area.
3. Kameraanordnung nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass zwei Weitwinkel -Einzelkameras Rücken an Rücken vorgese- hen und die Anbringung zur Befestigung nahe der Mitte des langgestreckten Raumbereiches vorgesehen ist. 3. Camera arrangement according to the preceding claim, characterized in that two wide-angle single cameras provided back to back and the attachment for attachment is provided near the middle of the elongated space area.
EP09815419.8A 2008-12-23 2009-12-23 Bus camera Active EP2382607B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008062997A DE102008062997A1 (en) 2008-12-23 2008-12-23 bus camera
PCT/DE2009/001811 WO2010072214A2 (en) 2008-12-23 2009-12-23 Bus camera

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EP2382607A2 true EP2382607A2 (en) 2011-11-02
EP2382607B1 EP2382607B1 (en) 2017-11-15

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DE (2) DE102008062997A1 (en)
WO (1) WO2010072214A2 (en)

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Also Published As

Publication number Publication date
WO2010072214A3 (en) 2010-08-26
US20120002048A1 (en) 2012-01-05
WO2010072214A2 (en) 2010-07-01
DE102008062997A1 (en) 2010-07-22
US9165445B2 (en) 2015-10-20
DE112009003834A5 (en) 2012-06-21
EP2382607B1 (en) 2017-11-15

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