EP1548673B1 - Arrangement d'éclairage pour un appareil-photo de surveillance - Google Patents

Arrangement d'éclairage pour un appareil-photo de surveillance Download PDF

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Publication number
EP1548673B1
EP1548673B1 EP04030215A EP04030215A EP1548673B1 EP 1548673 B1 EP1548673 B1 EP 1548673B1 EP 04030215 A EP04030215 A EP 04030215A EP 04030215 A EP04030215 A EP 04030215A EP 1548673 B1 EP1548673 B1 EP 1548673B1
Authority
EP
European Patent Office
Prior art keywords
lighting means
optical axis
axis
illumination device
lighting
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.)
Not-in-force
Application number
EP04030215A
Other languages
German (de)
English (en)
Other versions
EP1548673A1 (fr
Inventor
Michael Dr.-Ing. Fischell
Martin Dipl.-Ing. Timml
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.)
Airbus Operations GmbH
Original Assignee
Airbus Operations 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 Airbus Operations GmbH filed Critical Airbus Operations GmbH
Publication of EP1548673A1 publication Critical patent/EP1548673A1/fr
Application granted granted Critical
Publication of EP1548673B1 publication Critical patent/EP1548673B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G08B13/1965—Systems specially adapted for intrusion detection in or around a vehicle the vehicle being an aircraft

Definitions

  • the invention relates to a lighting device for a monitor camera having a plurality of respective lighting means axis Lma 1 ... n having lighting means Lm 1 ... n, wherein the lighting means Lm 1 ... n along a circular line about the optical Axis O of the surveillance camera are arranged around and adjacent bulbs Lm 1, ..., n have equal distances from each other.
  • a parallel arrangement of the camera optics and the illumination device is common.
  • the infrared light emitting diodes (IRED) or the light emitting diodes (LED) are either arranged with the camera optics behind a cover or the diodes are arranged separately on the front of the housing.
  • the emission direction of such illumination devices is determined as a result of the arrangement of the infrared light-emitting diodes or the light-emitting diodes, which is parallel to the camera optics, above all by the emission angles of the diodes.
  • a method and an apparatus for detecting objects are known.
  • at least one illumination device with a radiation source and a camera are arranged above a monitoring surface.
  • the radiation emitted by the radiation source for example an infrared laser diode, is reflected by the surveillance surface or an object located in its area and captured by the camera.
  • the illumination unit has, in addition to the radiation source, an optical grating in the beam path for generating a pattern and a lens optic. With a corresponding grid and the camera is provided.
  • an image processing unit a comparison is made between the image currently captured by the camera and an image stored in an image memory. The superimposition of the patterns results in moiré effects, by means of which objects in the surveillance area can be reproduced with greater contrast and can be detected more reliably.
  • the luminous means axes Lma 1,..., N do not run parallel to an optical axis O of the surveillance camera, the circular line lying in a luminous plane E perpendicular to the optical axis O with an x-axis and a y-axis running perpendicular thereto the lamp axes Lma 1, ..., n with the optical axis O each have different angles ⁇ 1, ..., n of about 30 ° to 60 ° and with the x-axis respectively different angles ⁇ 1, ..., n in a range between 0 ° and 360 °.
  • the illumination device As a result, a uniform illumination of the receiving area or of the receiving space in front of the surveillance camera is achieved by means of the illumination device. An undesired overexposure of the recording object in the direction of the optical axis is no longer done.
  • the contrast of the means of the invention Illuminating device obtained Image is uniformly high over the entire image area and also well suited for evaluation by means of automated image processing algorithms. Possibly security-relevant objects and details in the border area of the picture can be recognized well.
  • Fig. 1 shows the lighting device 1 in a view from above.
  • the illumination device 1 surrounds a surveillance camera 2 with a lens 3.
  • the objective 3 is provided with a diaphragm 4 in order to largely prevent dazzling of the surveillance camera 2 by the illumination device 1.
  • the surveillance camera 2 has an optical axis O which is perpendicular to the plane of the drawing or to a plane of the illuminant plane E spanned by an x and y axis.
  • the arrow on the optical axis O points in the direction of one in the Drawing of the sake of clarity not shown in detail, in front of the surveillance camera 2 in the monitoring room or in the surveillance area located receiving object.
  • the objective 3 and the diaphragm 4 are rotationally symmetrical with respect to the optical axis O positioned. Notwithstanding this arrangement shown, other positions, such as an eccentric arrangement of the surveillance camera 2, the aperture 4 and the illumination device 1 are possible.
  • the illumination device 1 comprises eight light sources Lm 1,..., N , which are arranged along a circular line 6 and which lie in the illuminant plane E spanned by the x and y axes.
  • the lighting means Lm 1, ..., n respectively equal distances to the adjacent light source Lm 1, ..., n on.
  • the light sources Lm 1,..., N each have a light-emitting axis Lma 1,..., N and emit radiation in the near infrared range or radiation in the visible range substantially in the direction of the arrow on the respective light source axis Lma 1 ,. .n down.
  • the orientation of the illuminant axes Lma 1,..., N thus corresponds to the main emission direction of the respective luminous means Lm 1,..., N.
  • the arrangement of the lamps Lm 1, ..., n can also be done in other ways than in the positioning shown in Fig. 1. For example, it is conceivable to position the light sources Lm 1,..., N along a square, rectangular or elliptical line around the surveillance camera 2. Alternatively, a statistically distributed over the surface arrangement of the lamps Lm 1, ..., n is conceivable. Furthermore, it is not necessary for the light sources Lm 1,..., N to be arranged in a luminous means plane E. For example, it is conceivable that the light sources Lm 1,..., N have different height positions with respect to the optical axis O and are arranged in different planes running parallel to the light-emitting surface E. Furthermore, the number of light sources Lm 1,..., N is not limited to the number of eight light sources Lm 1,..., N shown in the exemplary embodiment.
  • the surveillance camera 2 used - preferably infrared light emitting diodes (IR-ED) or light-emitting diodes (LED), which emit light especially in the visible range, used.
  • IR-ED infrared light emitting diodes
  • LED light-emitting diodes
  • the light emitting diodes or the infrared light emitting diodes have the advantage of a long life and a low vibration sensitivity. As a result, diodes are virtually maintenance free.
  • other light sources Lm 1,..., N can also be used, such as infrared lasers, infrared laser diodes or incandescent lamps.
  • the illuminant axis Lma 1 of the first luminous means Lm 1 with an x-axis includes, for example, an angle ⁇ 1 of approximately 45 °.
  • the y-axis is arranged at right angles to the x-axis.
  • the angles .theta.2 ,..., N between the other luminous axis Lma 2,..., N of the luminous means Lm 2,..., N and the x-axis preferably increase depending on their position on the circular line 6 in each case in 45 ° steps, ie have values of about 90 °, 135 °, 180 °, 225 °, 270 °, 315 ° and 360 °.
  • the angles ⁇ 1, ..., n can take any value between 0 ° and 360 °.
  • the respective illuminant axis Lma 1,..., N should preferably be oriented such that it does not point exclusively to the camera 2 or to the aperture 4. This ensures that the main emission direction of each luminous means Lm 1,..., N is directed away from the surveillance camera 2 and the optical axis O substantially to the outside.
  • a uniform increase of the angle ⁇ as shown in the embodiment of FIGS. 1, 2 as a function of the position of the luminous means Lm 1,..., N on the circular line 6 is not necessary.
  • the number of lamps Lm 1,..., N used and their orientation depends above all on their radiation intensity, the size and the geometry of the surveillance area monitored by the surveillance camera or the surveillance space. Depending on these parameters, other values for the angle ⁇ may be required depending on the arrangement of the bulbs Lm 1, ..., n on the circle 6 in order to achieve optimum reproduction of a subject.
  • a number of seven has rotationally symmetric about the optical Axis O arranged around bulbs Lm 1, ..., n for controlling smaller monitoring rooms or monitoring areas proved to be particularly advantageous.
  • the experimental arrangement is not shown in the figures for the sake of clarity.
  • the seven lamps Lm 1, .., 7 are in this case, starting from a "12 o'clock position" on a circular line along, evenly spaced from each other.
  • "12 o'clock position" means that the luminous means Lm 1 is arranged in the upper intersection between the y-axis and the circular line or whose illuminant axis Lma m1 points in this direction in the direction of the y-axis.
  • the further illuminant axes Lma 2,..., 7 close the luminous means Lm 2,..., 7 with the x-axis in a clockwise direction, for example angles ⁇ 1 in each case . ..., 7 from 90 ° ⁇ 10 °, 230 ° ⁇ 10 °, 255 ° ⁇ 10 °, 270 ° ⁇ 10 °, 270 ° ⁇ 10 °, 285 ° ⁇ 10 °, 320 ° ⁇ 10 °.
  • FIG. 2 shows the illumination device 1 according to the invention in a side view.
  • the optical axis O is perpendicular to the x-axis.
  • five illuminants Lm 5, 6, 7, n, 1 are shown by way of example in the illustration.
  • the illuminant axes Lma 5, 6, 7, n, 1 of these luminous means Lm 5, 6, 7, n, 1 each include angles ⁇ 5, 6, 7, n, 1 of approximately 45 ° with the optical axis O.
  • values between 30 ° and 60 ° have proved suitable for the angle ⁇ 1,..., N.
  • a value of ⁇ 1, ..., n of about 45 ° has proven to be particularly advantageous.
  • Values for the angle ⁇ 1,..., N which are outside the range of 30 ° to 60 °, lead to a significant deterioration of the imaging results obtained with the monitoring camera 2 or the image obtained.
  • FIG. 3 shows a standardized representation of the illumination intensities achieved by means of the illumination device 1 according to the invention in the surveillance area or monitoring space in front of the illumination device 1 along the optical axis O and the x and y axes.
  • the angle numbers on the semicircle correspond to the respective spatial direction.
  • An intensity curve 7 shown in solid lines reflects the intensity distribution of the radiation which is usually achieved with known illumination devices in which the illuminant axes are aligned parallel to the optical axis O of the camera.
  • the spatial intensity distribution of the radiation in space results from a rotation of the intensity curve 7 around the optical axis O, resulting in a total of a "club-shaped", spatial intensity distribution.
  • the height extent of the curve 7 in the direction of the optical axis O is a measure of the intensity of the radiation in this area. At the angle number of 0 °, the intensity curve 7 intersects the optical axis O. At this point, the radiation intensity reaches a maximum. For comparison with the intensity curve 7, an intensity curve 8 resulting using the illumination device 1 according to the invention is shown dotted.
  • the intensity of the radiation in the vicinity of the optical axis O is significantly higher in the case of the intensity curve 7 than in the intensity curve 8. Furthermore, the intensity curve 7 is higher and narrower, whereas the Intensity curve 8 is formed lower and wider.
  • the lighting device 1 according to the invention results in a better and, above all, more even illumination of the monitoring area or the monitoring space located in front of the camera. This results in a more uniform contrast distribution of the image generated by the surveillance camera 2 and the illumination device 1. As a result, the image can be better processed and evaluated by means of automated image processing algorithms.
  • the illumination device avoids only a selective illumination of a receiving object located in the region of the optical axis O within the surveillance area or the surveillance space, which in known embodiments of illumination devices leads to locally undesirably high contrast differences of the generated image. An overshadowing of, for example, a short distance in front of the surveillance camera located face of a person does not take place.
  • the surveillance area or the surveillance area is illuminated more uniformly by means of the illumination device 1 according to the invention.
  • the surveillance camera 2 therefore generates a surveillance image with a good contrast over the entire image area.
  • objects and details which are located outside the center of the image or remote from the optical axis O of the surveillance camera 2 are much better displayed.
  • the won Images can be evaluated and processed more easily manually or with suitable image processing algorithms - for example for automated image recognition, for automated access control or the like.
  • the lighting device 1 must of course be adapted to the geometry or nature of the space or area to be monitored. The adaptation is carried out as described above in the individual case by the appropriate selection of the number and type of lighting, their radiation intensity, their radiation characteristics and their orientation in space with respect to the optical axis O (angle ⁇ , ⁇ ) of the surveillance camera. 2
  • FIG. 4 shows a test image taken by means of a known illumination device with an infrared surveillance camera.
  • FIG. 5 shows a test image which was produced using the illumination device 1 according to the invention and an infrared surveillance camera.
  • the contrast of the test image in FIG. 4 in the boundary region between the facial surface of the imaged person and the background is somewhat higher than the contrast of the image according to FIG. 5 as a whole.
  • objects and details which are located outside the center of the test image in FIG. 4 can only be recognized poorly because the contrast to the edge of the image decreases rapidly as a result of the punctual overspray of the surveillance area or surveillance space along the optical axis O of the surveillance camera 2 (see Fig. 4).
  • the more uniform contrast distribution over the total area of the test image of FIG. 5 enables a better evaluation of the image content over the entire area of the image.
  • An over-radiation of the center of the image is avoided by the illumination device 2 according to the invention.
  • Objects and details which are outside the center of the image of the test image according to FIG. 5 are rich in contrast, therefore rich in detail and thus well evaluated.
  • images obtained with the illumination device according to the invention can be better evaluated manually or by automated image processing algorithms, for example for image recognition or for checking access authorizations.
  • image processing algorithms for example for image recognition or for checking access authorizations.
  • possibly safety-relevant, dangerous objects and details outside of the center of the picture can be clearly displayed and displayed.
  • Areas of application for the lighting device according to the invention include passenger cabins, luggage and cargo areas in aircraft, passenger doors in aircraft, and cockpit doors in aircraft.
  • the lighting device according to the invention is not limited to the application in the field of civil and military aviation. Conceivable are applications in other security-related areas, such as room monitoring in buildings, the monitoring of outdoor areas of buildings or the like and the control of areas occupied by passengers in transport facilities of public local and long-distance transport.
  • the light sources Lm 1,..., N of the illumination device 1 according to the invention have infrared light emitting diodes (IRED) in the case of using an infrared surveillance camera, which is particularly sensitive to radiation in the near infrared range of the electromagnetic spectrum.
  • IRED infrared light emitting diodes
  • the lighting means preferably comprise white light-emitting diodes (LEDs) which preferably emit light in the region of the electromagnetic spectrum visible to the human eye.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Studio Devices (AREA)
  • Burglar Alarm Systems (AREA)

Claims (6)

  1. Dispositif d'éclairage (1) pour une caméra de surveillance (2) comprenant plusieurs moyens d'éclairage Lm1...n présentant chacun un axe de moyen d'éclairage Lma1...n, les moyens d'éclairage Lm1...n étant disposés le long d'un cercle (6) tout autour de l'axe optique O de la caméra de surveillance (2) et des moyens d'éclairage voisins Lm1...n présentant des distances mutuelles égales, caractérisé en ce que les axes des moyens d'éclairage Lma1...n ne s'étendent pas parallèlement à un axe optique O de la caméra de surveillance (2), le cercle (6) se situant dans un plan des moyens d'éclairage E perpendiculaire à l'axe optique O avec un axe x et un axe y perpendiculaire à ce dernier et les axes des moyens d'éclairage Lma1...n formant chacun avec l'axe optique O des angles différents Φ1...n d'environ 30° à 60° et avec l'axe x des angles différents θ 1...n dans une plage comprise entre 0° et 360°.
  2. Dispositif d'éclairage (1) suivant la revendication 1, caractérisé en ce qu'il est prévu une surface d'éclairage monobloc contenant les moyens d'éclairage Lm1...n.
  3. Dispositif d'éclairage (1) suivant l'une des revendications 1 et 2, caractérisé en ce que la surface d'éclairage entoure l'axe optique O et présente par exemple une configuration en anneau de cercle, elliptique ou une autre configuration géométrique.
  4. Dispositif d'éclairage (1) suivant l'une des revendications 1 à 3, caractérisé en ce que les moyens d'éclairage Lm1...n émettent un rayonnement invisible pour l'oeil humain, en particulier dans le domaine infrarouge proche.
  5. Dispositif d'éclairage (1) suivant l'une des revendications 1 à 4, caractérisé en ce que les moyens d'éclairage Lm1...n émettent un rayonnement visible pour l'oeil humain.
  6. Dispositif d'éclairage (1) suivant l'une des revendications 1 à 5, caractérisé en ce que les moyens d'éclairage Lm1...n comportent par exemple des diodes électroluminescentes à rayonnement infrarouge (RED), des diodes électroluminescentes (LED), des diodes laser infrarouge, des diodes laser, des lampes à incandescence, des lampes à halogène, des lampes à décharge, des lampes au néon, des tubes fluorescents, des éléments électroluminescents ou autres moyens émettant un rayonnement.
EP04030215A 2003-12-23 2004-12-21 Arrangement d'éclairage pour un appareil-photo de surveillance Not-in-force EP1548673B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10360761A DE10360761A1 (de) 2003-12-23 2003-12-23 Beleuchtungseinrichtung für eine Überwachungskamera
DE10360761 2003-12-23

Publications (2)

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EP1548673A1 EP1548673A1 (fr) 2005-06-29
EP1548673B1 true EP1548673B1 (fr) 2007-04-11

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EP04030215A Not-in-force EP1548673B1 (fr) 2003-12-23 2004-12-21 Arrangement d'éclairage pour un appareil-photo de surveillance

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US (1) US7738033B2 (fr)
EP (1) EP1548673B1 (fr)
AT (1) ATE359576T1 (fr)
DE (2) DE10360761A1 (fr)

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EP2863371A1 (fr) 2013-09-05 2015-04-22 Siemens Convergence Creators GmbH Caméra de surveillance et procédé associé destiné à traiter des enregistrements d'images de la caméra de surveillance
WO2015058730A1 (fr) 2013-10-23 2015-04-30 Koukaam A.S. Équipement de rayonnement pour caméra cctv
US10674587B2 (en) 2016-10-11 2020-06-02 Signify Holding B.V. Control system for a surveillance system, surveillance system and method of controlling a surveillance system
WO2021262178A1 (fr) * 2020-06-25 2021-12-30 Hewlett-Packard Development Company, L.P. Dispositifs informatiques dotés d'anneaux d'éclairage

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Also Published As

Publication number Publication date
DE10360761A1 (de) 2005-07-28
ATE359576T1 (de) 2007-05-15
DE502004003454D1 (de) 2007-05-24
US7738033B2 (en) 2010-06-15
EP1548673A1 (fr) 2005-06-29
US20050168625A1 (en) 2005-08-04

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