WO2003100518A2 - Procede et systeme de prise de photographies d'un vehicule - Google Patents

Procede et systeme de prise de photographies d'un vehicule Download PDF

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Publication number
WO2003100518A2
WO2003100518A2 PCT/DE2003/001704 DE0301704W WO03100518A2 WO 2003100518 A2 WO2003100518 A2 WO 2003100518A2 DE 0301704 W DE0301704 W DE 0301704W WO 03100518 A2 WO03100518 A2 WO 03100518A2
Authority
WO
WIPO (PCT)
Prior art keywords
image
lens
wedge
vehicle
angle
Prior art date
Application number
PCT/DE2003/001704
Other languages
German (de)
English (en)
Other versions
WO2003100518A3 (fr
Inventor
Uwe Schaller
Wolfgang Seidel
Ullrich Krüger
Original Assignee
Robot Visual Systems Gmbh
Jenoptik Laser, Optik, Systeme Gmbh
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 Robot Visual Systems Gmbh, Jenoptik Laser, Optik, Systeme Gmbh filed Critical Robot Visual Systems Gmbh
Priority to DE50304370T priority Critical patent/DE50304370D1/de
Priority to BR0304936-1A priority patent/BR0304936A/pt
Priority to EP03737906A priority patent/EP1509812B1/fr
Priority to AU2003245840A priority patent/AU2003245840A1/en
Publication of WO2003100518A2 publication Critical patent/WO2003100518A2/fr
Publication of WO2003100518A3 publication Critical patent/WO2003100518A3/fr
Priority to IL165047A priority patent/IL165047A/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
    • G08G1/0175—Detecting movement of traffic to be counted or controlled identifying vehicles by photographing vehicles, e.g. when violating traffic rules

Definitions

  • the invention relates to a method and an arrangement for photographing a vehicle, with which an image document (front photo) is created, which is suitable for unambiguously and tamper-proof identification of both the driver and the license plate.
  • the passenger compartment and thus the vehicle driver must be adequately illuminated. This is usually possible regardless of daylight in a range of the vehicle from the recording device between 30 m and 12 m and at a vehicle speed of up to 250 km / h only with an additional flash light. To make matters worse, there is often an optical coloring of the windshields, which additionally reduces the intensity of the radiation, which is already slightly reflected by the driver.
  • the retroreflective mark almost reflects the radiation
  • wet film is still preferred in traffic photography. Extremely differently illuminated pixels can be processed within certain limits by extensive reworking when developing the film, so that the image information is visible.
  • DE 35 35 588 A1 discloses a method and an apparatus for photographically capturing highly luminous or reflecting parts of a visual field to be photographed.
  • a retroreflective indicator of a To be able to photographically record the vehicle together with the other, normally illuminated parts of the field of view, a light-attenuating filter is attached in the image plane of the camera and extends across the image plane. The brightness of the image is reduced in the area covered by the filter.
  • the image of the license plate must be created in the area of the filter. This means that the camera must be aligned very precisely with the vehicle.
  • DE 297 18 274 U1 discloses a camera recorder for speed measuring devices, which is characterized by a gradient filter placed in front of the lens. This half-colored filter with a smooth transition from the dark to the light part is used in such a way that the darker part in particular weakens the reflection of the license plate.
  • the locally differentiated attenuation can, however, only be completely inadequate, to the point that it does not work at all if the filter is close to or in the entrance pupil of the lens.
  • EP 0621 572 A1 offers a method and a device in which two different image sections of a traffic scene are recorded at the same time with two digital cameras at a different angle. The electronic image data of both recordings are saved together for security of evidence.
  • DE 199 60 888 A1 describes a method and a device in which at least two images of different brightness are generated from the image data of a recording.
  • the first 8 bits of the CCD sensor which contain more usable information about the light component, are read out as a dark image, which makes it easier to identify the very brightly radiating mark.
  • the last 8 bits of the sensor generate the bright image, which contains more usable information about the dark portion of the image and thus vehicle drivers.
  • a second interesting electronic solution is disclosed in DE 100 29 578 A1.
  • the exposure of the license plate and the exposure of the passenger interior can be treated separately when determining a target value (desired exposure of the object).
  • images optimized for the brightness of the passenger compartment and images optimized for the brightness of the license plate can be generated, which of course requires at least two images.
  • the device according to the invention should advantageously be able to be created by retrofitting recording devices for traffic photography available on the market.
  • This retrofitting should preferably be possible without intervention in the hardware of the recording device and without a necessary adjustment to the recording device by the user.
  • the working regime e.g. triggering the recording and the flash light, output of the flash light, reading, storing and evaluating the image information
  • the recording device should not be influenced.
  • Nothing should change for the user in handling.
  • the object of the invention is achieved for a method according to the preamble of claim 1 in that the imaging beam reflected from the vehicle and causing the imaging is split into two partial beams, the first partial beam having an only imperceptibly lower light intensity than that of the entire imaging beam. generates a first image on which the vehicle driver is clearly recognizable, while the second partial beam with a light intensity of less than 5% generates a second image on which the license plate is clearly recognizable and that the two geometrically identical images on the recording medium are offset from one another at the same time and spatially generated and saved.
  • the object is achieved in that means are provided in the beam path of the imaging beam for dividing the imaging beam into two mutually offset partial beams of different intensities, which have two geometrically identical images of different intensities on the recording medium cause with a local offset to each other, the first image of the vehicle driver and the second image of the license plate well illuminated and recognizable.
  • the essence of the method according to the invention is that two geometrically identical images of the object field on the same recording medium are generated offset from one another with a single recording of an object field. It is essential to the invention that the second image is generated with a very low light intensity, less than 5%, preferably less than 1%, while for the first image the remaining light intensity, which can be up to greater than 99% of the radiation incident in the lens, is as far as possible can be used.
  • the first image only imperceptibly lower in light intensity compared to the image with full light intensity, depicts the full object field, whereby, as with conventional images, the driver of the vehicle in the passenger compartment is well visible when illuminated by the flash light and the highly reflective license plate often only appears as an overdriven light spot.
  • a low-contrast area is created on the first image below the vehicle, which is practically always on a quasi-homogeneous low-contrast road surface.
  • the second image is almost completely dark due to the low light intensity, except for the license plate, which is optimally exposed here.
  • the two images double images
  • the two images are offset from one another in such a way that the identifier recognizable in the second image is mapped onto the recording medium wherever areas of low contrast without useful image information are mapped from the first image.
  • the area below the vehicle is preferably used here. Practical tests have shown that, especially when using electronic recording media (CCD sensor), no ghosting occurs due to the low dynamics.
  • the usable image information of the second image (only the indicator) is projected onto an area of the first image in which there is no usable image information (only road surface).
  • the image information of both images is saved and processed at the same time as a single image.
  • a wet film, used as the recording medium also experiences a single exposure, as just described for a CCD sensor.
  • Vehicle drivers and license plates are recorded in a legally clear and tamper-proof manner with the identical imaging optics and stored in an overall picture or a data record.
  • a data-based resolution of the overall image in the first and second images is also possible, at least for the electronic recording medium, and can therefore be clearly assigned.
  • Decisive for the ratio of light intensity for the two images to be implemented in terms of device technology is the amount of light with which the license plate is optimally imaged. Since this ratio can be achieved in terms of device technology and the amount of light determining the second image can be selected to be very small, even less than 1%, there is the basic possibility, irrespective of the traffic-technical possibilities, of directing the recording device towards the vehicle.
  • a device suitable for carrying out the method must have means which fulfill the following sub-functions:
  • a large number of arrangement variants can be generated in relation to one another.
  • All arrangement variants basically consist of a lens (means for generating an imaging beam), a recording medium such as a wet film (chemical storage) or an electronic sensor arrangement (electronic storage) arranged in the image plane of the lens (means for imaging the two images and storage the image data) as well as means for dividing the imaging beam and for displacing the resulting partial beams.
  • a lens means for generating an imaging beam
  • a recording medium such as a wet film (chemical storage) or an electronic sensor arrangement (electronic storage) arranged in the image plane of the lens (means for imaging the two images and storage the image data) as well as means for dividing the imaging beam and for displacing the resulting partial beams.
  • the means for dividing the imaging beam and for displacing the resulting partial beams differ for the individual performance variants essentially in the physical principle they implement, the resulting concrete technical implementation and their arrangement within the arrangement variant.
  • these means can be arranged in front of the lens, within the lens or between the lens and the recording medium.
  • the imaging beam between the object and the lens is a parallel beam.
  • the additional introduction of optically effective means within the lens or between the lens and the recording medium is basically only possible with a new construction of a recording device, since these additional optical means are taken into account when calculating the optical system of the recording device, determined by the recording lens and the recording medium Need to become. Knowing the present description, the person skilled in the art will be able to use such solutions in an equivalent manner for new designs.
  • the means for separating the beam can be based on physical beam splitting e.g. with a divider cube, a prism, a coated divider plate or a Fresnel divider plate, as well as geometric beam splitting by pupil division with a fixed or variable division ratio.
  • the offset of the partial beams can be changed by an angular offset e.g. with a wedge, a pair of rotating wedges, a prism or an angle mirror (fixed or variable) or a parallel beam offset e.g. with a flat plate (fixed or variable).
  • Fig. 1 a first embodiment as a sectional view in side view
  • Fig. 1 b embodiment of Fig. 1 a in plan view
  • Fig. 2 lens attachment for a second embodiment as a sectional view in side view
  • Fig. 3 lens attachment for a third embodiment as
  • Sectional view in side view Fig. 4a lens attachment for a fourth embodiment as
  • the optical processing takes place particularly advantageously in the parallel beam path in front of the lens 1
  • all of the following exemplary embodiments describe arrangements consisting of a recording device 4 with a lens 1, a recording medium 2 in the image plane of the lens 1, which is both a wet film and can also be a CCD sensor and a lens attachment 3.
  • the lens attachment 3 is constructed differently for the individual exemplary embodiments, in particular the individual designs comprise different specific technical means for processing the beam bundle integrated in the lens attachment 3.
  • FIGS. 1 a and 1 b A first embodiment is shown in FIGS. 1 a and 1 b.
  • the lens attachment 3 is screwed on via an outer ring 6 via an objective filter thread 5 provided on the recording device 4.
  • a circular wedge-shaped optical wedge 8 with an angle ⁇ is fixed in a retaining ring 7 fitted in the outer ring 6. It is clear to the person skilled in the art that the outer ring 6 shown here, at least so that the retaining ring 7 can be inserted, is at least a two-part assembly. It should be emphasized again that the representations in the drawings were reduced to the essentials in order to clearly present the principle solutions.
  • the pupil opening 9 is geometrically divided into two partial surfaces, the division ratio and the resulting intensity distribution for the two partial beams arising being determined by the dimensioning of the wedge surface 10.
  • the retaining ring 7 is rotatably mounted in the outer ring 6 and can be adjusted by the operator by means of a wrench engaging in holes 12 in such a way that an exactly vertical offset of the second image, which is formed by the partial beam of rays running through the wedge 8, results in relation to the first image which is created by the unaffected partial beam.
  • the image location 13 of the first partial beam which passes unchanged through the remaining free area 11 of the pupil opening 9, arises, as usual, on the optical axis of the objective 1 in the plane of the recording medium 2.
  • the second partial beam passing through the wedge 8 strikes at the wedge deflection angle ⁇ , on the lens 1 and is thus imaged on the recording medium 2 offset from the optical axis (image location 14 of the second partial beam).
  • the lens attachment 3 has on its front side facing away from the lens 1 a thread of the same dimensions as the lens filter thread 5.
  • An extension of the arrangement according to the invention would be a mechanical displacement unit which makes the wedge 8 displaceable in the radial direction. In this way, the brightness of the second image could be optimized to the current lighting situation, particularly in the case of mobile and mobile-stationary devices.
  • FIG. 2 shows an objective attachment 3 for a second exemplary embodiment.
  • This lens attachment 3 is mounted on a recording device 4 analogously to the first exemplary embodiment.
  • a pair of flat plates 15 is provided as optical means, which fixes a fixed angle ⁇ in the retaining ring 7.
  • the pair of plane plates 15 represents an angle mirror with a fixed angle.
  • the ray bundle entering the pupil becomes, in accordance with Fresnel's law, in each case on the surface of the plane plates, which each represent an optical interface (glass-air or air-glass), in a penetrating and one reflected partial beam split.
  • the partial beam passing through is the first partial beam which is used for the visible imaging of the vehicle driver, while the reflected partial beam is the second partial beam which is consequently provided for the visible mapping of the number plate in the description of the invention.
  • these interfaces are not optically anti-reflective, approx. 4% of the radiation intensity is reflected on each surface (with perpendicular passage).
  • the directly passing first partial beam thus has an intensity of approximately 85% of the beam entering the pupil.
  • the rest of the radiation is essentially lost due to the reflection at the first interface.
  • the division ratio can be influenced as desired by targeted optical coating of the interfaces.
  • the direction in which the second image is displaced can be determined by rotating the retaining ring 7.
  • the third exemplary embodiment which is illustrated in FIG. 3, functions on the same principle as the second exemplary embodiment.
  • the angular offset equal to the mirror angle deflection ⁇ 2 can be variably adjusted in that the angle ⁇ between the thin glass plates forming a pair of flat plates 15 can be varied by an angular range ⁇ .
  • one of the two plane plates can be tilted variably against the other by the angular range ⁇ .
  • the set angle ⁇ can be read on the drum of the adjusting screw 16.
  • the possibility of changing the angular offset can prove to be useful in mobile stations, in order to be able to adapt the image offset to the image of the number plate of the vehicle size shown at different shooting distances (approx. 10 to 25 m).
  • the fourth exemplary embodiment is distinguished by the fact that it allows the intensity ratio to be varied in a structurally simple manner without the vertical image offset changing. Such a solution would be particularly advantageous for mobile devices that should be easily and quickly aligned to different lanes. As already explained, the incidence of the radiation reflected by the license plate depends very much on the viewing angle from which the vehicle is imaged.
  • the retaining ring 7 is rotatably mounted to the outer ring 6 and thus to the recording device 4.
  • a pendulum ball bearing 17 aligned radially to the optical axis.
  • a gravity pendulum 18 is suspended on the inner ring of the pendulum ball bearing 17, to which a wedge 8 is attached in such a way that the angle ⁇ is always perpendicular, so that the beam deflection is always takes place in the vertical direction.
  • the lens attachment 3 is reduced here to the outer ring 6 and the wedge 8 and is attached to the lens 1.
  • the wedge 8 extends over the entire pupil opening 9, as a result of which, in contrast to the previously considered exemplary embodiments with the wedge 8, the entire imaging beam passes through the wedge 8.
  • the two partial beams are formed on the one hand by the refraction at the exit from the wedge 8 and by the double reflection in the wedge 8. Both partial beams are deflected here by an angular offset to the optical axis.
  • the angle ⁇ is equal to the wedges 8 of the other exemplary embodiments, an angle with respect to a perpendicular to the optical axis, ie the entry surface of the wedge 8 is perpendicular to the optical axis, while the exit surface is arranged inclined by the angle ⁇ with respect to this perpendicular.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Studio Devices (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Traffic Control Systems (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Cameras In General (AREA)

Abstract

Procédé et système de prise de photographies d'un véhicule permettant de produire un document sous forme d'images (photographie frontale) adapté pour identifier, de manière claire et sans risque de manipulation, tant le chauffeur que le numéro d'immatriculation. A l'aide d'une seule prise, deux images géométriquement identiques d'intensité différente sont produites de manière isochrone et localement décalée l'une par rapport à l'autre sur le milieu de support qui peut être aussi bien un film humide qu'un dispositif de détection électronique. Ledit système est composé de préférence d'un appareil de prise de vues utilisé de manière classique pour les photographies de circulation et d'un adaptateur pour objectif.
PCT/DE2003/001704 2002-05-23 2003-05-22 Procede et systeme de prise de photographies d'un vehicule WO2003100518A2 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE50304370T DE50304370D1 (de) 2002-05-23 2003-05-22 Verfahren und anordnung zur fotografischen aufnahme eines fahrzeuges
BR0304936-1A BR0304936A (pt) 2002-05-23 2003-05-22 Procedimento e disposição para o registro fotográfico de um veìculo
EP03737906A EP1509812B1 (fr) 2002-05-23 2003-05-22 Procede et systeme de prise de photographies d'un vehicule
AU2003245840A AU2003245840A1 (en) 2002-05-23 2003-05-22 Method and arrangement used to photographically capture a vehicle
IL165047A IL165047A (en) 2002-05-23 2004-11-04 Method and arrangement used to photographically capture a vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10223923.1 2002-05-23
DE10223923A DE10223923B4 (de) 2002-05-23 2002-05-23 Verfahren und Anordnung zur fotografischen Aufnahme eines Fahrzeuges

Publications (2)

Publication Number Publication Date
WO2003100518A2 true WO2003100518A2 (fr) 2003-12-04
WO2003100518A3 WO2003100518A3 (fr) 2004-04-01

Family

ID=29557385

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/001704 WO2003100518A2 (fr) 2002-05-23 2003-05-22 Procede et systeme de prise de photographies d'un vehicule

Country Status (8)

Country Link
EP (1) EP1509812B1 (fr)
AT (1) ATE334426T1 (fr)
AU (1) AU2003245840A1 (fr)
BR (1) BR0304936A (fr)
DE (2) DE10223923B4 (fr)
ES (1) ES2270053T3 (fr)
IL (1) IL165047A (fr)
WO (1) WO2003100518A2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1542191A1 (fr) * 2003-12-10 2005-06-15 Sagem S.A. Procédé et système d'identification d'un véhicule en déplacement
EP1542192A1 (fr) * 2003-12-10 2005-06-15 Sagem SA Procede et systeme d'identification d'un vehicule en deplacement
EP2157558A1 (fr) * 2008-08-19 2010-02-24 ROBOT Visual Systems GmbH Procédé et dispositif pour photographier un véhicule
WO2010085931A1 (fr) * 2009-01-28 2010-08-05 Jenoptik Robot Gmbh Procédé et dispositif permettant de détecter de manière probante un dépassement d'une vitesse maximale autorisée sur un tronçon d'une voie de circulation
WO2011000415A1 (fr) * 2009-06-30 2011-01-06 Siemens Aktiengesellschaft Procédé et dispositif de surveillance du trafic routier
FR2956747A1 (fr) * 2010-03-19 2011-08-26 Hugueny Alain Marie Filtre separateur, hautes et basses lumieres, par prisme(s) a faible deviation angulaire

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006058057B3 (de) * 2006-12-07 2008-07-24 Sick Ag Verfahren und Vorrichtung zur optischen Erfassung einer Struktur
EP2178059A1 (fr) 2008-10-16 2010-04-21 ROBOT Visual Systems GmbH Dispositif destiné à la saisie d'infractions routières et au contrôle de plaques d'immatriculation

Citations (2)

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Publication number Priority date Publication date Assignee Title
US3794409A (en) * 1971-12-17 1974-02-26 Lockheed Aircraft Corp Method and apparatus forming plural focused images with a common lens system
US4548495A (en) * 1981-02-27 1985-10-22 Takeomi Suzuki Proper focusing state detecting device

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JPS5767916A (en) * 1980-10-14 1982-04-24 Mitsubishi Electric Corp Photographing device of car
JPS60195533A (ja) * 1984-03-19 1985-10-04 Koito Ind Co Ltd ストロボフラツシユを用いて車両の前面を撮影する方法及びその装置
DE3535588A1 (de) * 1985-10-05 1987-04-09 Robot Foto Electr Kg Verfahren und vorrichtung zur photographischen erfassung stark leuchtender oder reflektierender teile eines zu photographierenden gesichtsfeldes
JPH08265614A (ja) * 1995-03-20 1996-10-11 Olympus Optical Co Ltd 瞳分割式画像分割撮影装置
DE29718274U1 (de) * 1997-10-15 1998-03-19 Rugullis, Michel, 29614 Soltau Camerarecorder von Geschwindigkeitsmeßgeräten mit eingebautem Verlauffilter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3794409A (en) * 1971-12-17 1974-02-26 Lockheed Aircraft Corp Method and apparatus forming plural focused images with a common lens system
US4548495A (en) * 1981-02-27 1985-10-22 Takeomi Suzuki Proper focusing state detecting device

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 148 (P-133), 7. August 1982 (1982-08-07) & JP 57 067916 A (MITSUBISHI ELECTRIC CORP), 24. April 1982 (1982-04-24) *
PATENT ABSTRACTS OF JAPAN vol. 010, no. 052 (P-432), 28. Februar 1986 (1986-02-28) & JP 60 195533 A (KOITO KOGYO KK), 4. Oktober 1985 (1985-10-04) *
See also references of EP1509812A2 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1542191A1 (fr) * 2003-12-10 2005-06-15 Sagem S.A. Procédé et système d'identification d'un véhicule en déplacement
EP1542192A1 (fr) * 2003-12-10 2005-06-15 Sagem SA Procede et systeme d'identification d'un vehicule en deplacement
FR2863755A1 (fr) * 2003-12-10 2005-06-17 Sagem Procede et systeme d'identification d'un vehicule en deplacement
FR2867594A1 (fr) * 2003-12-10 2005-09-16 Sagem Procede et systeme d'identification d'un vehicule en deplacement
EP2157558A1 (fr) * 2008-08-19 2010-02-24 ROBOT Visual Systems GmbH Procédé et dispositif pour photographier un véhicule
WO2010085931A1 (fr) * 2009-01-28 2010-08-05 Jenoptik Robot Gmbh Procédé et dispositif permettant de détecter de manière probante un dépassement d'une vitesse maximale autorisée sur un tronçon d'une voie de circulation
US8639435B2 (en) 2009-01-28 2014-01-28 Jenoptik Robot Gmbh Method and system for conclusively capturing a violation of the speed limit on a section of road
WO2011000415A1 (fr) * 2009-06-30 2011-01-06 Siemens Aktiengesellschaft Procédé et dispositif de surveillance du trafic routier
FR2956747A1 (fr) * 2010-03-19 2011-08-26 Hugueny Alain Marie Filtre separateur, hautes et basses lumieres, par prisme(s) a faible deviation angulaire

Also Published As

Publication number Publication date
EP1509812A2 (fr) 2005-03-02
BR0304936A (pt) 2004-09-28
AU2003245840A1 (en) 2003-12-12
ATE334426T1 (de) 2006-08-15
AU2003245840A8 (en) 2003-12-12
DE50304370D1 (de) 2006-09-07
EP1509812B1 (fr) 2006-07-26
DE10223923A1 (de) 2003-12-18
ES2270053T3 (es) 2007-04-01
WO2003100518A3 (fr) 2004-04-01
DE10223923B4 (de) 2004-07-22
IL165047A (en) 2009-09-01
IL165047A0 (en) 2005-12-18

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