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EP1561143A1 - Panoramic surveillance device - Google Patents

Panoramic surveillance device

Info

Publication number
EP1561143A1
EP1561143A1 EP03782571A EP03782571A EP1561143A1 EP 1561143 A1 EP1561143 A1 EP 1561143A1 EP 03782571 A EP03782571 A EP 03782571A EP 03782571 A EP03782571 A EP 03782571A EP 1561143 A1 EP1561143 A1 EP 1561143A1
Authority
EP
European Patent Office
Prior art keywords
panoramic
panoramic image
image
equipment according
mirror
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03782571A
Other languages
German (de)
French (fr)
Inventor
Mark Berdugo
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.)
LUX INTEGRAL VISION HOLDING SA
Original Assignee
Global Vision Holding SA
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
Priority claimed from FR0214308A external-priority patent/FR2847348B1/en
Priority claimed from FR0303788A external-priority patent/FR2847349B1/en
Priority claimed from FR0304551A external-priority patent/FR2847350B1/en
Application filed by Global Vision Holding SA filed Critical Global Vision Holding SA
Publication of EP1561143A1 publication Critical patent/EP1561143A1/en
Withdrawn legal-status Critical Current

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
    • G08B13/19—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 infrared-radiation detection systems
    • G08B13/193—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 infrared-radiation detection systems using focusing means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B37/00—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/698—Control of cameras or camera modules for achieving an enlarged field of view, e.g. panoramic image capture

Definitions

  • the present invention relates to the field of panoramic shooting equipment, in particular intended for video surveillance.
  • deforming mirrors is also known with anamorphic optical or software processing.
  • PCT patent WO9506303 describes a surveillance system for controlling a space, comprising a single camera and a convex dome-type mirror.
  • the camera is fixed relative to the mirror so that at least the majority of the surface of the mirror is within the field of view of the camera.
  • the mirror has a profile such that the radiation from most of the space is reflected by the dome-type mirror on the image plane of the camera.
  • the dome type mirror is circularly symmetrical, its axis of symmetry being aligned relative to the optical axis of the camera.
  • the camera is an electronic camera comprising a sensor with charge coupling device at the level of its image plane.
  • the processed image of the space produced by the camera is displayed on a control screen as a circle or flat image.
  • the image processing system of the electronic camera may include a motion detection algorithm for generating an alarm if motion is detected in any predetermined area of the space.
  • the camera comprises a convex mirror which captures the light of the surrounding panorama, an astigmatism lens which corrects the astigmatism, an objective lens which converts the light at a point unique, a flattening field lens that converts polar format images into two-dimensional planar images, and an image capture mechanism that captures optimized, two-dimensional ring images of the surrounding panorama.
  • This panoramic camera also includes various systems for displaying and distributing panoramic images. Specifically, these systems include a device and method for digitally performing a geometric transformation of the two-dimensional annular image into rectangular projections so that the panoramic image can be displayed according to traditional methods such as printed images and television images.
  • This solution is intended for 360 ° shooting but it produces images that are not very usable for video surveillance.
  • panoramic images do not correctly capture details of the field covered and therefore do not allow effective video surveillance.
  • the invention aims to achieve a compact panoramic video surveillance equipment avoiding the drawbacks of the various solutions of the prior art.
  • the invention relates, in its most general sense, to equipment for video surveillance comprising optical means for the formation of a panoramic image and the acquisition of said panoramic image by a camera transmitting video information to a station.
  • said equipment further comprises a means of acquiring an image with a non-panoramic angular opening inscribed in the panoramic shooting field, the orientation of said acquisition means being controlled relative to to the field of panoramic optical means as a function of an area of interest detected in said panoramic image.
  • the acquisition means consists of an additional camera movable along at least one axis of rotation.
  • the acquisition means is constituted by an additional camera movable along two perpendicular axes of rotation.
  • the means for forming the panoramic image comprise at least one mirror with axial symmetry, and of curved section and the acquisition means is constituted by an additional camera movable along the axis of symmetry of said mirror .
  • the means for forming the panoramic image comprises a main mirror of annular shape of concave section pierced in its center, reflecting a primary image on a concave round secondary mirror with an elliptical profile coaxial with the optical axis, the device comprising a digital image sensor disposed on the optical axis, for receiving the secondary image reflected by the secondary mirror.
  • the means for forming the panoramic image includes a diaphragm interposed between the secondary mirror and the image sensor; the means for forming the panoramic image comprises a primary mirror of circular shape of hyperboloic section;
  • the means for forming the panoramic image comprises a concave elliptical secondary mirror; - the image sensor of the means for forming the panoramic image disposed behind as far as in a transverse plane intersecting the primary mirror;
  • the secondary mirror of the means for forming the panoramic image is a mirror with an elliptical section;
  • the means for forming the panoramic image comprises a secondary mirror formed by a concave cap with an elliptical section profile ensuring the focusing of the primary mirror according to a torus on a sensor.
  • the means for forming the panoramic image comprises at least one indexing mark placed in the field scanned by the non-panoramic acquisition means.
  • it includes an indexing marker placed on an annular ring coaxial with the device for acquiring the panoramic image, and a second indexing marker placed in a plane containing the axis of the device for acquiring panoramic image.
  • the equipment further comprises a viewing station comprising means for pointing an area of interest of the panoramic image, and a circuit for controlling the angular position of the non-panoramic camera as a function of the information provided by the pointing means.
  • the pointing means comprises a touch screen for viewing the panoramic image.
  • the equipment further comprises a viewing station comprising a means of analyzing the panoramic image delivering information representative of the position of an area of interest of the panoramic image, and a circuit for control of the angular position of the non-panoramic camera according to the information provided by the analysis means.
  • said means of analysis is a means of detecting local modifications of the panoramic image.
  • FIG. 1 represents a view according to an axial section plane of an exemplary embodiment of a device according to the invention
  • Figure 2 shows a perspective view of a device according to the invention
  • Figures 3 and 4 show views in partial section along a radial plane
  • FIG. 5 represents a view of an image obtained with a device according to the invention.
  • FIG. 1 represents an exemplary embodiment of a device for taking panoramic views having a median axis of symmetry (10).
  • the field of view is cylindrical with an opening of about 70 ° in the radial planes.
  • the device comprises a primary mirror (1) of annular shape and of concave section. This mirror has a central hole.
  • the primary mirror (1) reflects the light rays towards a secondary mirror (2) arranged coaxially with the primary mirror (1), upstream of the field of view.
  • the secondary mirror (2) is formed by a concave cap with an elliptical section profile ensuring the focusing of the primary mirror according to a torus on a sensor (4).
  • the secondary mirror (2) reflects the light rays towards an eyepiece (3) composed of one or more lenses and integrating a diaphragm.
  • (4) for example a digital camera, receives the toric image adjusted by the eyepiece and delivers a digital signal. This signal is then processed by image processing software ensuring the correction of the deformations.
  • the main camera is placed in a transverse plane intersecting the primary mirror (1).
  • An additional camera (11) is arranged under the secondary mirror (2), in the blind spot of the main mirror (1).
  • This additional camera (11) is a non-panoramic field camera. It can be oriented along an axis of rotation coincident with the axis of symmetry (10) and along a perpendicular axis of rotation, to allow pointing in any area of the field of the panoramic shooting device.
  • This additional camera (11) provides a detail image allowing an enlarged visualization of an area of interest on a surveillance screen.
  • the selection of the area of interest is carried out manually by an operator responsible for monitoring, or automatically.
  • the operator has a pointing means making it possible to designate an area of interest on the screen for viewing the panoramic image.
  • This pointing means can be constituted in a known manner by a "mouse", or even by a touch screen.
  • the superimposition of a graphic pointer, the position of which is controlled by actuating the pointing means, with an area of the panoramic image makes it possible to calculate information for controlling the additional camera (11).
  • This information controls the orientation along one or two complementary axes of rotation.
  • the image captured by the camera (11) then corresponds to an enlarged view of the area of interest designated on the screen for viewing the panoramic image. This image can be viewed on the same screen or on a separate screen.
  • the location of the relative position of the panoramic image and the enlarged image can be improved by a target appearing in the field viewable by the additional camera.
  • This target can be constituted by one or more opaque or semi-opaque marks corresponding to determined positions. These marks are used to periodically readjust the detail image relative to a designated area of interest on the panoramic image.
  • the orientation of the additional camera (11) is controlled by a panoramic image analysis circuit, detecting by areas of interest the image processing.
  • the areas of interest can be determined by a local variation in the intensity or characteristics of the panoramic image.
  • a computer determines the barycenter of the detected area of interest and calculates the positioning information of the additional camera (11) as a function of the position of this barycenter.
  • a semi-automatic mode consists in proposing to the operator zones of interest, and in ordering the displacement of the additional camera (11) only in the event of validation by the operator
  • This proposal of the zone of interest can be translated by the automatic appearance of a graphic pointer, or by highlighting the area of interest.
  • the selection is made by an action on a validation key, or by designation of the area of interest on a touch screen.
  • FIG. 2 represents a perspective view showing the primary mirror (1) having the general shape of a truncated inverted cone, generated by the displacement of a concave line along a circular path.
  • the primary mirror (1) is pierced by an opening (8). It is placed opposite a concave secondary mirror (2) whose diameter, in the example shown is substantially identical to the diameter of the primary mirror (1).
  • Figures 3 and 4 show the optical paths in a device according to the example shown in Figure 2.
  • the field of view is formed by a circular ring having an angular opening of about 75 °.
  • FIG. 5 represents an image recorded with a device in accordance with the invention.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Studio Devices (AREA)
  • Stereoscopic And Panoramic Photography (AREA)
  • Lenses (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

The invention relates to equipment which is used for video surveillance, comprising optical means for the formation of a panoramic image and the acquisition of said panoramic image by a camera which transmits video information to a remote viewing station. The invention is characterised in that the equipment also comprises a means of acquiring an image with a non-panoramic angular aperture included in the panoramic field-of-view, the orientation of said acquisition means being controlled in relation to the field of the panoramic optical means according to a zone of interest detected in the panoramic image.

Description

DISPOSITIF DE SURVEILLANCE PANORAMIQUE PANORAMIC MONITORING DEVICE
La présente invention concerne le domaine des équipements de prise de vue panoramique, notamment destinés à la vidéosurveillance.The present invention relates to the field of panoramic shooting equipment, in particular intended for video surveillance.
On connaît dans l'état de la technique différentes solutions pour la prise de vue à très grand angle.Various solutions are known in the state of the art for shooting at very wide angles.
Les solutions utilisant des lentilles asphériques ne sont pas satisfaisantes car le coût de fabrication est très élevé et les aberrations difficiles à corriger avec des retraitements logiciels.Solutions using aspherical lenses are not satisfactory because the manufacturing cost is very high and aberrations difficult to correct with software reprocessing.
On connaît également l'utilisation de miroirs déformant avec un traitement anamorphique optique ou logiciel.The use of deforming mirrors is also known with anamorphic optical or software processing.
A titre d'exemple, le brevet PCT WO9506303 décrit un système de surveillance, pour contrôler un espace, comprenant une seule caméra et un miroir convexe de type dôme. La caméra est fixée par rapport au miroir de sorte qu'au moins la majorité de la surface du miroir se situe dans le champ de vision de la caméra. Le miroir présente un profil tel que les rayonnements provenant de la majorité de l'espace sont réfléchis par le miroir de type dôme sur le plan image de la caméra. De préférence, le miroir de type dôme est symétrique de manière circulaire, son axe de symétrie étant aligné par rapport à l'axe optique de la caméra. En général, la caméra est une caméra électronique comportant un capteur à dispositif à couplage de charge au niveau de son plan image. L'image traitée de l'espace produite par la caméra est affichée sur un écran de contrôle sous forme d'image en cercle ou à plat. Le système de traitement d'images de la caméra électronique peut comprendre un algorithme de détection de mouvement destiné à générer une alarme en cas de détection d'un mouvement dans toute zone prédéterminée de l'espace.By way of example, PCT patent WO9506303 describes a surveillance system for controlling a space, comprising a single camera and a convex dome-type mirror. The camera is fixed relative to the mirror so that at least the majority of the surface of the mirror is within the field of view of the camera. The mirror has a profile such that the radiation from most of the space is reflected by the dome-type mirror on the image plane of the camera. Preferably, the dome type mirror is circularly symmetrical, its axis of symmetry being aligned relative to the optical axis of the camera. In general, the camera is an electronic camera comprising a sensor with charge coupling device at the level of its image plane. The processed image of the space produced by the camera is displayed on a control screen as a circle or flat image. The image processing system of the electronic camera may include a motion detection algorithm for generating an alarm if motion is detected in any predetermined area of the space.
Un autre brevet publié sous le numéro 09750252A1 concerne un appareil de prise de vues panoramique qui capture instantanément une image panoramique à 360 degrés. Selon un des modes de réalisation, l'appareil de prise de vues comprend un miroir convexe qui capture la lumière du panorama environnant, une lentille d'astigmatisme qui corrige l'astigmatisme, une lentille d'objectif qui fait converger la lumière en un point unique, une lentille d'aplatissement de champ qui fait converger des images de format polaire en images planaires bidimensionnelles, et un mécanisme de capture d'images qui capture des images annulaires bidimensionnelles, optimisées, du panorama environnant. Cet appareil de prise de vues panoramique comprend également divers systèmes d'affichage et de répartition des images panoramiques. Spécifiquement, ces systèmes comprennent un dispositif et un procédé permettant de réaliser numériquement une transformation géométrique de l'image annulaire bidimensionnelle en projections rectangulaires de sorte que l'image panoramique puisse être affichée selon des procédés traditionnels tels que des images imprimées et des images télévisées.Another patent published under number 09750252A1 relates to a panoramic camera which instantly captures a 360-degree panoramic image. According to one of the embodiments, the camera comprises a convex mirror which captures the light of the surrounding panorama, an astigmatism lens which corrects the astigmatism, an objective lens which converts the light at a point unique, a flattening field lens that converts polar format images into two-dimensional planar images, and an image capture mechanism that captures optimized, two-dimensional ring images of the surrounding panorama. This panoramic camera also includes various systems for displaying and distributing panoramic images. Specifically, these systems include a device and method for digitally performing a geometric transformation of the two-dimensional annular image into rectangular projections so that the panoramic image can be displayed according to traditional methods such as printed images and television images.
Cette solution est destinée à la prise de vue sur 360° mais elle produit des images peu exploitables pour la vidéosurveillance .This solution is intended for 360 ° shooting but it produces images that are not very usable for video surveillance.
En effet, les images panoramiques ne permettent pas d'appréhender correctement des détails du champ couvert et ne permettent donc pas de réaliser une vidéosurveillance efficace.Indeed, panoramic images do not correctly capture details of the field covered and therefore do not allow effective video surveillance.
On c onna î t é ga l eme nt de s s o l ut i on s de vidéosurveillance utilisant une caméra à champ normal , balayant le volume à surveiller . Cette solution permet certes d' obtenir des images satisfaisantes , mais présente l'inconvénient de laisser des zones non visualisées pendant le balayage. Chaque zone à surveiller n'est visualisée que pendant une durée très limitée, inférieure à la durée d' ombre. La présente invention vise à réaliser un équipement de vidéosurveillance panoramique compact évitant les inconvénients des différentes solutions de l'art antérieur. A cet effet, l'invention concerne selon son acception la plus générale un équipement pour la surveillance vidéo comportant des moyens optiques pour la formation d'une image panoramique et l'acquisition de ladite image panoramique par une caméra transmettant une information vidéo à un poste de visualisation distant, caractérisé en ce que ledit équipement comporte en outre un moyen d'acquisition d'une image avec une ouverture angulaire non panoramique inscrite dans le champ de prise de vue panoramique, l'orientation dudit moyen d'acquisition étant commandé par rapport au champ des moyens optiques panoramiques en fonction d'une zone d'intérêt détectée dans ladite image panoramique.We also know of video surveillance solutions using a normal field camera, scanning the volume to be monitored. This solution certainly makes it possible to obtain satisfactory images, but presents the downside of leaving areas unseen during scanning. Each zone to be monitored is only displayed for a very limited time, less than the shadow duration. The present invention aims to achieve a compact panoramic video surveillance equipment avoiding the drawbacks of the various solutions of the prior art. To this end, the invention relates, in its most general sense, to equipment for video surveillance comprising optical means for the formation of a panoramic image and the acquisition of said panoramic image by a camera transmitting video information to a station. remote viewing device, characterized in that said equipment further comprises a means of acquiring an image with a non-panoramic angular opening inscribed in the panoramic shooting field, the orientation of said acquisition means being controlled relative to to the field of panoramic optical means as a function of an area of interest detected in said panoramic image.
Avantageusement, le moyen d'acquisition est constitué par une caméra additionnelle mobile selon au moins un axe de rotation.Advantageously, the acquisition means consists of an additional camera movable along at least one axis of rotation.
Selon une variante, le moyen d'acquisition est constitué par une caméra additionnelle mobile selon deux axes de rotation perpendiculaires.According to a variant, the acquisition means is constituted by an additional camera movable along two perpendicular axes of rotation.
Selon un mode de réalisation préféré, les moyens de formation de l'image panoramique comportent au moins un miroir à symétrie axiale, et de section courbe et le moyen d' acquisition est constitué par une caméra additionnelle mobile selon l'axe de symétrie dudit miroir.According to a preferred embodiment, the means for forming the panoramic image comprise at least one mirror with axial symmetry, and of curved section and the acquisition means is constituted by an additional camera movable along the axis of symmetry of said mirror .
De préférence, le moyen de formation de l'image panoramique comporte un miroir principal de forme annulaire de section concave percé en son centre, réfléchissant une image primaire sur un miroir secondaire rond concave et à profil elliptique coaxial à l'axe optique, le dispositif comprenant un capteur d'images numérique disposé sur l'axe optique, pour recevoir l'image secondaire réfléchie par le miroir secondaire.Preferably, the means for forming the panoramic image comprises a main mirror of annular shape of concave section pierced in its center, reflecting a primary image on a concave round secondary mirror with an elliptical profile coaxial with the optical axis, the device comprising a digital image sensor disposed on the optical axis, for receiving the secondary image reflected by the secondary mirror.
Selon des modes de réalisation particuliers :According to particular embodiments:
- le moyen de formation de l'image panoramique comporte un diaphragme interposé entre le miroir secondaire et le capteur d' images ; - le moyen de formation de l'image panoramique comporte un miroir primaire de forme circulaire de section hyperboloïque ;- The means for forming the panoramic image includes a diaphragm interposed between the secondary mirror and the image sensor; the means for forming the panoramic image comprises a primary mirror of circular shape of hyperboloic section;
- le moyen de formation de l' image panoramique comporte un miroir secondaire concave elliptique ; - le capteur d' images du moyen de formation de l'image panoramique disposé en arrière jusque dans un plan transversal intersectant le miroir primaire ;the means for forming the panoramic image comprises a concave elliptical secondary mirror; - the image sensor of the means for forming the panoramic image disposed behind as far as in a transverse plane intersecting the primary mirror;
- le miroir secondaire du moyen de formation de l'image panoramique est un miroir à section elliptique ; - le moyen de formation de l'image panoramique comporte un miroir secondaire formé par une calotte concave à profil de coupe elliptique assurant la focalisation du miroir primaire selon un tore sur un capteur.the secondary mirror of the means for forming the panoramic image is a mirror with an elliptical section; the means for forming the panoramic image comprises a secondary mirror formed by a concave cap with an elliptical section profile ensuring the focusing of the primary mirror according to a torus on a sensor.
Avantageusement, le moyen de formation de l'image panoramique comporte au moins un repère d' indexation placé dans le champ balayé par le moyen d'acquisition non panoramique.Advantageously, the means for forming the panoramic image comprises at least one indexing mark placed in the field scanned by the non-panoramic acquisition means.
Selon une variante, il comporte un repère d'indexation disposé sur une couronne annulaire coaxiale avec le dispositif d'acquisition de l'image panoramique, et un second repère d'indexation placé dans un plan contenant l'axe du dispositif d'acquisition d'image panoramique.According to a variant, it includes an indexing marker placed on an annular ring coaxial with the device for acquiring the panoramic image, and a second indexing marker placed in a plane containing the axis of the device for acquiring panoramic image.
Selon un mode de réalisation particulier, l'équipement comporte en outre un poste de visualisation comportant un moyen de pointage d'une zone d'intérêt de l'image panoramique, et un circuit de commande de la position angulaire de la caméra non panoramique en fonction des informations fournies par le moyen de pointage. Selon un mode de mise en œuvre avantageux, le moyen de pointage comprend un écran tactile pour la visualisation de l'image panoramique.According to a particular embodiment, the equipment further comprises a viewing station comprising means for pointing an area of interest of the panoramic image, and a circuit for controlling the angular position of the non-panoramic camera as a function of the information provided by the pointing means. According to an advantageous embodiment, the pointing means comprises a touch screen for viewing the panoramic image.
Selon une autre variante, l'équipement comporte en outre un poste de visualisation comportant un moyen d'analyse de l'image panoramique délivrant une information représentative de la position d'une zone d'intérêt de 1' image panoramique, et un circuit de commande de la position angulaire de la caméra non panoramique en fonction des informations fournies par le moyen d'analyse. Selon un mode de mise en œuvre particulier, ledit moyen d'analyse est un moyen de détection des modifications locales de l'image panoramique.According to another variant, the equipment further comprises a viewing station comprising a means of analyzing the panoramic image delivering information representative of the position of an area of interest of the panoramic image, and a circuit for control of the angular position of the non-panoramic camera according to the information provided by the analysis means. According to a particular mode of implementation, said means of analysis is a means of detecting local modifications of the panoramic image.
L'invention sera mieux comprise à la lecture de la description qui suit, se référant aux dessins annexés correspondant à un exemple non limitatif, où : la figure 1 représente une vue selon un plan de coupe axial d'un exemple de réalisation d'un dispositif selon l'invention ; la figure 2 représente une vue en perspective d'un dispositif conforme à l'invention ; les figures 3 et 4 représentent des vues en coupe partielle selon un plan radial ; la figure 5 représente une vue d'une image obtenue avec un dispositif conforme à l'invention. La figure 1 représente un exemple de réalisation d'un dispositif de prise de vues panoramiques présentant un axe de symétrie médian (10) . Le champ de prise de vue est cylindrique avec une ouverture d'environ 70° dans les plans radiaux. Le dispositif comprend un miroir primaire (1) de forme annulaire et de section concave. Ce miroir présente un perçage central. Le miroir primaire (1) réfléchit les rayons lumineux vers un miroir secondaire (2) disposé coaxialement au miroir primaire (1), en amont du champ de prise de vue. Le miroir secondaire (2) est formé par une calotte concave à profil de coupe elliptique assurant la focalisation du miroir primaire selon un tore sur un capteur (4 ) . Le miroir secondaire (2) réfléchit les rayons lumineux vers un oculaire (3) composé de une ou plusieurs lentilles et intégrant un diaphragme. Un capteur d'imageThe invention will be better understood on reading the description which follows, referring to the appended drawings corresponding to a nonlimiting example, where: FIG. 1 represents a view according to an axial section plane of an exemplary embodiment of a device according to the invention; Figure 2 shows a perspective view of a device according to the invention; Figures 3 and 4 show views in partial section along a radial plane; FIG. 5 represents a view of an image obtained with a device according to the invention. FIG. 1 represents an exemplary embodiment of a device for taking panoramic views having a median axis of symmetry (10). The field of view is cylindrical with an opening of about 70 ° in the radial planes. The device comprises a primary mirror (1) of annular shape and of concave section. This mirror has a central hole. The primary mirror (1) reflects the light rays towards a secondary mirror (2) arranged coaxially with the primary mirror (1), upstream of the field of view. The secondary mirror (2) is formed by a concave cap with an elliptical section profile ensuring the focusing of the primary mirror according to a torus on a sensor (4). The secondary mirror (2) reflects the light rays towards an eyepiece (3) composed of one or more lenses and integrating a diaphragm. An image sensor
(4), par exemple une caméra numérique, reçoit l'image torique ajustée par l'oculaire et délivre un signal numérique. Ce signal est ensuite traité par un logiciel de traitement d'image assurant la correction des déformations.(4), for example a digital camera, receives the toric image adjusted by the eyepiece and delivers a digital signal. This signal is then processed by image processing software ensuring the correction of the deformations.
La caméra principale est placée dans un plan transversal coupant le miroir primaire (1) .The main camera is placed in a transverse plane intersecting the primary mirror (1).
Ceci permet de réaliser un dispositif de faible encombrement.This allows a device to take up little space.
Une caméra additionnelle (11) est disposée sous le miroir secondaire (2), dans l'angle mort du miroir principal (1). Cette caméra additionnelle (11) est une caméra à champs non panoramique. Elle est orientable selon un axe de rotation confondu avec l'axe de symétrie (10) et selon un axe de rotation perpendiculaire, pour permettre un pointage dans une zone quelconque du champ du dispositif de prise de vue panoramique.An additional camera (11) is arranged under the secondary mirror (2), in the blind spot of the main mirror (1). This additional camera (11) is a non-panoramic field camera. It can be oriented along an axis of rotation coincident with the axis of symmetry (10) and along a perpendicular axis of rotation, to allow pointing in any area of the field of the panoramic shooting device.
Cette caméra additionnelle (11) fournit une image de détail permettant une visualisation agrandie d'une zone d'intérêt sur un écran de surveillance.This additional camera (11) provides a detail image allowing an enlarged visualization of an area of interest on a surveillance screen.
Il est ainsi possible de procéder sur un même écran, ou sur des écrans indépendants, à la surveillance globale d'une zone panoramique, et l'analyse d'une zone d'intérêt particulier apparaissant dans l'image panoramique.It is thus possible to carry out global monitoring on the same screen, or on independent screens. of a panoramic area, and the analysis of a particular area of interest appearing in the panoramic image.
La sélection de la zone d' intérêt est réalisée manuellement par un opérateur chargé de la surveillance, ou automatiquement.The selection of the area of interest is carried out manually by an operator responsible for monitoring, or automatically.
Dans le premier cas, l'opérateur dispose d'un moyen de pointage permettant de désigner sur l'écran de visualisation de l'image panoramique une zone d'intérêt. Ce moyen de pointage peut être constitué de façon connu par une « souris », ou encore par un écran tactile. La superposition d'un pointeur graphique dont la position est commandée par l' actionnement du moyen de pointage, avec une zone de l'image panoramique permet de calculer une information de pilotage de la caméra additionnelle (11). Cette information commande l'orientation selon un ou deux axes de rotation complémentaires. L'image captée par la caméra (11) correspond alors à une vue agrandie de la zone d'intérêt désignée sur l'écran de visualisation de l'image panoramique. Cette image peut être visualisée sur le même écran ou sur un écran distinct. Son affichage ne supprime pas l'affichage de l'image panoramique, ce qui permet à l'opérateur de continuer la surveillance de l'ensemble de la zone, et la détection d'éventuelles nouvelles zones d' intérêt. Le repérage de la position relative de l'image panoramique et de l'image agrandie peut être amélioré par une mire apparaissant dans le champ visualisable par la caméra additionnelle. Cette mire peut être constituée par un ou plusieurs repères opaques ou semi-opaques correspondant à des positions déterminées. Ces repères permettent de recaler périodiquement l'image de détail par rapport à une zone d'intérêt désignée sur l'image panoramique. Dans la solution automatique, l'orientation de la caméra additionnelle (11) est commandée par un circuit d'analyse de l'image panoramique, détectant par un traitement d'image les zones d'intérêt. Les zones d'intérêt peuvent être déterminées par une variation locale de l'intensité ou des caractéristiques de l'image panoramique. Un calculateur détermine alors le barycentre de la zone d'intérêt détectée et calcule l'information de positionnement de la caméra additionnelle (11) en fonction de la position de ce barycentre.In the first case, the operator has a pointing means making it possible to designate an area of interest on the screen for viewing the panoramic image. This pointing means can be constituted in a known manner by a "mouse", or even by a touch screen. The superimposition of a graphic pointer, the position of which is controlled by actuating the pointing means, with an area of the panoramic image makes it possible to calculate information for controlling the additional camera (11). This information controls the orientation along one or two complementary axes of rotation. The image captured by the camera (11) then corresponds to an enlarged view of the area of interest designated on the screen for viewing the panoramic image. This image can be viewed on the same screen or on a separate screen. Its display does not suppress the display of the panoramic image, which allows the operator to continue monitoring the entire area, and detecting any new areas of interest. The location of the relative position of the panoramic image and the enlarged image can be improved by a target appearing in the field viewable by the additional camera. This target can be constituted by one or more opaque or semi-opaque marks corresponding to determined positions. These marks are used to periodically readjust the detail image relative to a designated area of interest on the panoramic image. In the automatic solution, the orientation of the additional camera (11) is controlled by a panoramic image analysis circuit, detecting by areas of interest the image processing. The areas of interest can be determined by a local variation in the intensity or characteristics of the panoramic image. A computer then determines the barycenter of the detected area of interest and calculates the positioning information of the additional camera (11) as a function of the position of this barycenter.
Un mode semi-automatique consiste à proposer à l'opérateur des zones d'intérêt, et à commander le déplacement de la caméra additionnelle (11) seulement en cas de validation par l'opérateur Cette proposition de la zone d' intérêt peut se traduire par l'apparition automatique d'un pointeur graphique, ou de la mise en surbrillance de la zone d'intérêt. La sélection se fait par une action sur une touche de validation, ou par désignation de la zone d'intérêt sur un écran tactile.A semi-automatic mode consists in proposing to the operator zones of interest, and in ordering the displacement of the additional camera (11) only in the event of validation by the operator This proposal of the zone of interest can be translated by the automatic appearance of a graphic pointer, or by highlighting the area of interest. The selection is made by an action on a validation key, or by designation of the area of interest on a touch screen.
La figure 2 représente une vue en perspective faisant apparaître le miroir primaire (1) présentant la forme générale d'un cône inversé tronqué, engendré par le déplacement d'un ligne concave le long d'un chemin circulaire. Le miroir primaire (1) est percé par une ouverture (8). Il est placé en regard d'un miroir secondaire concave (2) dont le diamètre, dans l'exemple représenté est sensiblement identique au diamètre du miroir primaire (1) . Les figures 3 et 4 représentent les trajets optiques dans un dispositif conforme à l'exemple représenté en figure 2. Le champ de prise de vue est formé par une couronne circulaire présentant une ouverture angulaire d'environ 75°. La figure 5 représente une image enregistrée avec un dispositif conforme à l'invention. FIG. 2 represents a perspective view showing the primary mirror (1) having the general shape of a truncated inverted cone, generated by the displacement of a concave line along a circular path. The primary mirror (1) is pierced by an opening (8). It is placed opposite a concave secondary mirror (2) whose diameter, in the example shown is substantially identical to the diameter of the primary mirror (1). Figures 3 and 4 show the optical paths in a device according to the example shown in Figure 2. The field of view is formed by a circular ring having an angular opening of about 75 °. FIG. 5 represents an image recorded with a device in accordance with the invention.

Claims

REVENDICATIONS
1 - Equipement pour la surveillance vidéo comportant des moyens optiques pour la formation d'une image panoramique et l'acquisition de ladite image panoramique par une caméra transmettant une information vidéo à un poste de visualisation distant, caractérisé en ce que ledit équipement comporte en outre un moyen d'acquisition d'une image avec une ouverture angulaire non panoramique inscrite dans le champ de prise de vue panoramique, l'orientation dudit moyen d'acquisition étant commandé par rapport au champ des moyens optiques panoramiques en fonction d'une zone d'intérêt détectée dans ladite image panoramique.1 - Equipment for video surveillance comprising optical means for the formation of a panoramic image and the acquisition of said panoramic image by a camera transmitting video information to a remote viewing station, characterized in that said equipment also comprises means for acquiring an image with a non-panoramic angular aperture inscribed in the panoramic shooting field, the orientation of said acquisition means being controlled relative to the field of panoramic optical means as a function of an area d interest detected in said panoramic image.
2 - Equipement selon la revendication 1, caractérisé en ce que le moyen d'acquisition est constitué par une caméra additionnelle mobile selon au moins un axe de rotation.2 - Equipment according to claim 1, characterized in that the acquisition means is constituted by an additional mobile camera along at least one axis of rotation.
3 - Equipement selon la revendication 1, caractérisé en ce que le moyen d'acquisition est constitué par une caméra additionnelle mobile selon deux axes de rotation perpendiculaires .3 - Equipment according to claim 1, characterized in that the acquisition means is constituted by an additional camera movable along two perpendicular axes of rotation.
4 - Equipement selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de formation de l'image panoramique comportent au moins un miroir à symétrie axiale et de section courbe, et en ce que le moyen d'acquisition est constitué par une caméra additionnelle mobile selon l'axe de symétrie dudit miroir .4 - Equipment according to any one of the preceding claims, characterized in that the means for forming the panoramic image comprise at least one mirror with axial symmetry and of curved section, and in that the acquisition means consists of an additional camera movable along the axis of symmetry of said mirror.
5 - Equipement selon la revendication 1, 2, ou 3, caractérisé en ce que le moyen de formation de l' image panoramique comporte un miroir principal de forme annulaire de section concave percé en son centre, réfléchissant une image primaire sur un miroir secondaire rond concave et à profil elliptique coaxial à l'axe optique, le dispositif comprenant un capteur d'images numérique disposé sur l'axe optique, pour recevoir l'image secondaire réfléchie par le miroir secondaire.5 - Equipment according to claim 1, 2, or 3, characterized in that the image forming means panoramic comprises a main mirror of annular shape of concave section pierced in its center, reflecting a primary image on a concave round secondary mirror and with elliptical profile coaxial with the optical axis, the device comprising a digital image sensor disposed on the optical axis, to receive the secondary image reflected by the secondary mirror.
6 - Equipement selon la revendication 5, caractérisé en ce que le moyen de formation de l' image panoramique comporte un diaphragme interposé entre le miroir secondaire et le capteur d'images.6 - Equipment according to claim 5, characterized in that the means for forming the panoramic image comprises a diaphragm interposed between the secondary mirror and the image sensor.
7 - Equipement selon la revendication 5, caractérisé en ce que le moyen de formation de l'image panoramique comporte un miroir primaire de forme circulaire de section hyperboloïque .7 - Equipment according to claim 5, characterized in that the means for forming the panoramic image comprises a primary mirror of circular shape of hyperboloic section.
8 - Equipement selon la revendication 5, caractérisé en ce que le moyen de formation de l'image panoramique comporte un miroir secondaire concave elliptique.8 - Equipment according to claim 5, characterized in that the means for forming the panoramic image comprises a concave elliptical secondary mirror.
9 - Equipement selon la revendication 5, caractérisé en ce que le capteur d' images du moyen de formation de l'image panoramique est disposé en arrière jusque dans un plan transversal intersectant le miroir primaire.9 - Equipment according to claim 5, characterized in that the image sensor of the means for forming the panoramic image is arranged rearward in a transverse plane intersecting the primary mirror.
10 - Equipement selon la revendication 5, caractérisé en ce que le miroir secondaire du moyen de formation de l'image panoramique est un miroir à section elliptique.10 - Equipment according to claim 5, characterized in that the secondary mirror of the means for forming the panoramic image is a mirror with elliptical section.
11 - Equipement selon la revendication 5, caractérisé en ce que le moyen de formation de l' image panoramique comporte un miroir secondaire (2) formé par une calotte concave à prof il de coupe elliptique as surant la focalisation du miroir primaire selon un tore sur un capteur ( 4 ) .11 - Equipment according to claim 5, characterized in that the means for forming the panoramic image comprises a secondary mirror (2) formed by a cap concave to prof il of elliptical cut as ensuring focusing of the primary mirror according to a torus on a sensor (4).
12 - Equipement selon l'une quelconque des revendications précédentes, caractérisé en ce que le moyen de formation de l' image panoramique comporte au moins un repère d' indexation placée dans le champ balayé par le moyen d'acquisition non panoramique.12 - Equipment according to any one of the preceding claims, characterized in that the means for forming the panoramic image comprises at least one indexing mark placed in the field scanned by the non-panoramic acquisition means.
13 - Equipement selon la revendication précédente, caractérisé en ce qu' il comporte un repère d' indexation disposé sur une couronne annulaire coaxiale avec le dispositif d'acquisition de l'image panoramique, et un second repère d'indexation placé dans un plan contenant l'axe du dispositif d'acquisition d'image panoramique.13 - Equipment according to the preceding claim, characterized in that it comprises an indexing mark arranged on an annular ring coaxial with the device for acquiring the panoramic image, and a second indexing mark placed in a plane containing the axis of the panoramic image acquisition device.
14 - Equipement selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte en outre un poste de visualisation comportant un moyen de pointage d'une zone d'intérêt de l'image panoramique, et un circuit de commande de la position angulaire de la caméra non panoramique en fonction des informations fournies par le moyen de pointage.14 - Equipment according to any one of the preceding claims, characterized in that it further comprises a display station comprising means for pointing an area of interest of the panoramic image, and a circuit for controlling the angular position of the non-panoramic camera as a function of the information provided by the pointing means.
15 - Equipement selon la revendication 14, caractérisé en ce que le moyen de pointage comprend un écran tactile pour la visualisation de l'image panoramique.15 - Equipment according to claim 14, characterized in that the pointing means comprises a touch screen for viewing the panoramic image.
16 - Equipement selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte en outre un poste de visualisation comportant un moyen de l'analyse de l'image panoramique délivrant une information représentative de la position d'une zone d'intérêt de l'image panoramique, et un circuit de commande de la position angulaire de la caméra non panoramique en fonction des informations fournies par le moyen d'analyse.16 - Equipment according to any one of the preceding claims, characterized in that it further comprises a viewing station comprising a means of analyzing the panoramic image delivering information representative of the position of an area of interest of the panoramic image, and a circuit for controlling the angular position of the non-panoramic camera as a function of the information provided by the analysis means.
17 - Equipement selon la revendication 16, caractérisé en ce que le moyen d' analyse est un moyen de détection des modifications locales de l'image panoramique. 17 - Equipment according to claim 16, characterized in that the analysis means is a means of detecting local modifications of the panoramic image.
EP03782571A 2002-11-15 2003-11-14 Panoramic surveillance device Withdrawn EP1561143A1 (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
FR0214308 2002-11-15
FR0214308A FR2847348B1 (en) 2002-11-15 2002-11-15 PANORAMIC VIEWING DEVICE
FR0303788A FR2847349B1 (en) 2002-11-15 2003-03-27 PANORAMIC VIEWING DEVICE
FR0303788 2003-03-27
FR0304551 2003-04-11
FR0304551A FR2847350B1 (en) 2002-11-15 2003-04-11 PANORAMIC MONITORING DEVICE
PCT/FR2003/003397 WO2004046783A1 (en) 2002-11-15 2003-11-14 Panoramic surveillance device

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EP1561143A1 true EP1561143A1 (en) 2005-08-10

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JP (1) JP4416666B2 (en)
KR (1) KR20060023948A (en)
AU (1) AU2003290208A1 (en)
CA (1) CA2506256A1 (en)
WO (1) WO2004046783A1 (en)

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JP4416666B2 (en) 2010-02-17
JP2006506925A (en) 2006-02-23

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