A vision system integrated with or juxtaposed to a head-up display and comprising a camera with two distinct fields of view.

Abstract

The present invention relates to a vision system embedded in a vehicle (10) and comprising a mirror (12) configured to assume two states, including a reflective state in which the mirror reflects a set of incident light rays and a transparent state in which the mirror transmits at least a portion of the set of incident light rays, means for controlling a current state of the mirror between the reflective and transparent states, and a camera (11) comprising the mirror in its field of view and configured to acquire image content as a function of the current state of the mirror. The vision system is, for example, integrated into or juxtaposed with a head-up display system. Figure 1

Description

Title of the invention: Vision system integrated or juxtaposed with a head-up display and comprising a camera with two distinct fields of vision technical field

[0001] The present invention relates to a vision system comprising a camera having two distinct fields of view, the system being in particular mounted in a motor vehicle and integrated or juxtaposed with a head-up display. The invention also relates to a method for controlling such a vision system. Technological background

[0002] Modern vehicles are incorporating more and more features, and associated with these features, more and more diverse components. Indeed, modern vehicles include, for example, a very large number of advanced driver-assistance systems, known as ADAS (Advanced Driver-Assistance Systems), which assist the driver during a driving phase, for example, and improve vehicle safety.

[0003] Among the vehicle's embedded systems, we distinguish, for example, systems allowing driving according to a determined level of autonomy, such a system including at least one camera acquiring images of three-dimensional scenes taking place around the vehicle, for example in front of the vehicle.

[0004] We also distinguish systems requiring the acquisition of images of the vehicle driver, for example a driver monitoring system, known as DMS (from the English "Driver Monitoring System") or also called a driver attention monitor, such a system including a camera acquiring images of the face of the vehicle driver.

[0005] In addition to these systems, there is an automatic headlight activation system, which controls the switching on and off of the vehicle's headlights based, in particular, on ambient light. Such a system also includes a camera or a light sensor.

[0006] Thus, the increase in the number of systems embedded in a vehicle requires the addition of components which are sometimes redundant or of the same type, for example, according to the examples mentioned above, an ever-increasing number of cameras.

[0007] However, it now appears crucial to limit the number of these components. Indeed, optimizing the number of components in a vehicle allows: • a reduction in manufacturing costs by saving on materials, production time and labor, particularly for the assembly of these components, and on energy, • Improved vehicle reliability by reducing the number of components likely to fail and simplified maintenance because fewer components need to be checked and replaced, • an improvement in the vehicle's energy efficiency, resulting in a reduction in weight and lower consumption of some of its active components, • easier integration of new systems because they are more compact, and • a reduction in environmental impact by reducing the amount of waste represented by the vehicle at the end of its life. Summary of the present invention

[0008] An object of the present invention is to solve at least one of the problems of the technological background described above by optimizing the number of components associated with various embedded systems of a vehicle.

[0009] According to a first aspect, the present invention relates to a vision system embedded in a vehicle, the system comprising: - a mirror configured to take two states comprising a reflective state in which the mirror reflects a set of incident light rays and a transparent state in which the mirror allows at least a part of the set of incident light rays to pass through, - means for controlling a current state of the mirror among the two states, and - a camera including the mirror in its field of view configured to acquire image content as a function of said current state.

[0010] Such a vision system allows a single camera to be shared by several embedded systems using images and / or data acquired by that camera as input data, offering the possibility of acquiring different image content for each of these embedded systems. The vision system is therefore more compact than a vision system comprising several cameras and is more reliable because it has fewer components.

[0011] According to one variant of the vision system, the mirror is an electrochromic mirror.

[0012] According to another variant, the vision system is positioned behind a steering wheel of the vehicle.

[0013] According to yet another variant, the vision system belongs to a head-up vision system.

[0014] According to yet another variant of the vision system, the mirror is integrated into a windshield of the vehicle.

[0015] According to an additional variant of the vision system, an optical axis of the camera is arranged horizontally, the image content being representative of a three-dimensional scene taking place in front of the vehicle when the current state corresponds to the transparent state.

[0016] According to another variant of the vision system, an optical axis of the camera is arranged vertically, the image content being representative of the sky when the current state corresponds to the transparent state.

[0017] According to yet another variant of the vision system, the image content is representative of a face of a vehicle occupant when the current state corresponds to the reflective state.

[0018] The invention also relates, according to a second aspect, to a vehicle comprising a vision system as described above according to the first aspect of the present invention.

[0019] According to a third aspect, the invention relates to a method for controlling a vision system as described above according to the first aspect of the present invention, the method being implemented by at least one processor and comprising the following steps: - receiving initial data representative of a request for image data representative of one environment among two environments; - monitoring the current state of a mirror based on initial data; - acquisition of image data by a camera; and - transmission of image data to an on-board system of the vehicle equipped with the vision system.

[0020] According to a fourth aspect, the present invention relates to a computer program which includes instructions adapted for carrying out the steps of the process according to the third aspect of the present invention, in particular when the computer program is executed by at least one processor.

[0021] Such a computer program may use any programming language, and be in the form of source code, object code, or an intermediate code between source code and object code, such as in a partially compiled form, or in any other desirable form.

[0022] According to a fifth aspect, the present invention relates to a computer-readable recording medium on which is recorded a computer program comprising instructions for carrying out the steps of the process according to the third aspect of the present invention.

[0023] On the one hand, the recording medium can be any entity or device capable of storing the program. For example, the medium may include a storage means, such as a ROM, a CD-ROM, or a type ROM microelectronic circuit, or even a magnetic recording device or a hard drive.

[0024] On the other hand, this recording medium can also be a transmissible medium such as an electrical or optical signal, such a signal being able to be transmitted via an electrical or optical cable, by conventional or radio frequency, by self-directing laser beam, or by other means. The computer program according to the present invention can, in particular, be downloaded from an Internet-type network.

[0025] Alternatively, the recording medium may be an integrated circuit in which the computer program is incorporated, the integrated circuit being adapted to execute or to be used in the execution of the process in question. Brief description of the figures

[0026] Other features and advantages of the present invention will become apparent from the description of the particular and non-limiting embodiments of the present invention below, with reference to the attached Figures 1 to 5, in which:

[0027] [Fig-1] schematically illustrates part of a vehicle passenger compartment, according to a first particular embodiment of the present invention;

[0028] [Fig.2] schematically illustrates part of a vehicle passenger compartment, according to a second particular embodiment of the present invention;

[0029] [Fig.3] schematically illustrates part of a vehicle passenger compartment, according to a third particular embodiment of the present invention;

[0030] [Fig. 4] illustrates a device configured to control the on-board vision system in a vehicle, according to a particular and non-limiting embodiment of the present invention; and

[0031] [Fig.5] illustrates a flowchart of the different stages of a control process of a vision system embedded in a vehicle, according to a particular and non-limiting embodiment of the present invention. Description of examples of achievements

[0032] A vision device and a method for controlling such a device will now be described in what follows with joint reference to Figures 1 to 5. The same elements are identified with the same reference signs throughout the description that follows.

[0033] The terms "first," "second" (or "firsts," "seconds"), etc., are used in this document by arbitrary convention to allow for the identification and distinction of different elements (such as operations, means, etc.) implemented in the embodiments described below. Such elements may be distinct or correspond to a single element, depending on the embodiment.

[0034] Fig. 1 schematically illustrates part of a vehicle 10 passenger compartment, according to a first particular and non-limiting embodiment of the present invention.

[0035] Vehicle 10 corresponds to a vehicle with an internal combustion engine, an electric motor(s), or a hybrid vehicle with an internal combustion engine and one or more electric motors. The vehicle thus corresponds, for example, to a land vehicle such as a car, a truck, a bus, or a motorcycle. Finally, the vehicle corresponds to an autonomous or non-autonomous vehicle, that is to say, a vehicle operating according to a predetermined level of autonomy or under the total supervision of the driver.

[0036] The vehicle 10 includes a set of embedded systems, some of which require receiving image data acquired by a camera mounted in the vehicle 10.

[0037] The vehicle 10 includes a set of driver assistance systems, also known as ADAS. According to this first specific embodiment, the ADAS system includes an obstacle detection system designed to detect the presence of other road users or objects in front of the vehicle 10 in order, for example, to guide the vehicle 10 when it is in autonomous or semi-autonomous mode, to maintain a safe distance between the vehicle 10 and a vehicle in front of it, or to brake the vehicle 10 in the event of a risk of collision between the vehicle 10 and an obstacle or another road user. The obstacle detection system therefore requires knowledge of the environment of the vehicle 10, notably through the use of images acquired by a camera mounted in the vehicle 10 and observing the three-dimensional scene in front of the vehicle.Note that this AD AS also includes a computer, allowing, for example, the control of image acquisition by the camera and the processing of acquired images.

[0038] The vehicle 10 also includes a driver monitoring system, also known as a DMS (Driver Monitoring System) or driver attention monitor. Such a DMS is configured to monitor the driver's attention and alert the driver when drowsiness or a decrease in attention is detected. The DMS interacts with at least one camera that detects the orientation of the driver's head and / or gaze 99 to deduce whether the driver 99 is attentive, i.e., whether they are looking in the direction of the road, and / or whether the driver 99 is falling asleep by detecting eye closures or blinks.

[0039] Thus, the obstacle detection system and the DMS both require cameras, which observe different elements, namely a portion of road located in front of the vehicle 10 for the obstacle detection system and the face 99a of the driver for the DMS, the driver 99 being for example in a passenger compartment of the vehicle 10.

[0040] According to this first particular embodiment, the two systems mentioned above share the same camera 11. However, since the observed elements are different and located in distinct places, it is not possible to observe them from the same point of view with a conventional camera or a pinhole camera, that is to say a camera which is not wide angle, which generates distortions making it difficult to exploit images acquired by the latter.

[0041] Indeed, the driver's face 99a is visible from a viewpoint located in front of the driver 99 and looking rearward along the longitudinal direction of the vehicle 10, while the portion of road to be observed is located forward along this same longitudinal direction. It is therefore difficult to conceive of looking both forward and rearward along the longitudinal direction of the vehicle 10.

[0042] The camera 11 is positioned in front of the driver 99, for example in front of the steering wheel 14 in the direction of travel of the vehicle, i.e. behind the steering wheel 14 from the point of view of the driver 99, and behind or under the windscreen 13 of the vehicle 10. From this position, as mentioned previously, it is possible to observe both the face 99a and the portion of road in front of the vehicle 10.

[0043] In order to easily observe the portion of road located in front of the vehicle 10, the camera 11 is, according to this first particular embodiment, arranged so as to orient its optical axis Ao horizontally and towards the front of the vehicle 10 in the longitudinal direction of the vehicle 10, thus allowing it to observe this portion of road through the windshield 13. The portion of road is then located in a first field of vision, also called the direct field of vision 1la, associated with the camera 11, the first field of vision lia having as its main axis the optical axis Ao of the camera 11.

[0044] In order to also observe the face 99a from this position, a mirror 12 is positioned in front of the camera 11, i.e., within its field of vision. The mirror 12 is then positioned so as to reflect incident light rays from the face 99a towards the lens of the camera 11. An angle α is thus defined between the optical axis Ao and the plane of the mirror 12 so as to define the orientation, relative to the system comprising the camera 11 and the mirror 12, of a second field of vision, also called the reflected field of vision 11b, having as its principal axis a reflected axis AR oriented towards the face 99a. The angle α is, for example, between 70 and 110°, for example close to 85°.

[0045] In order to allow the camera to observe both the road and the face 99a from its position, the mirror 12 is configured to take two states comprising a reflective state in which the mirror 12 reflects a set of incident light rays and a transparent state in which the mirror 12 allows at least one part of the set of incident light rays. Such a mirror 12 is, for example, electrically controlled, the reflective state being obtained, for example, when the mirror 12 is subjected to a voltage. Such a screen 12 is then of the electrochromic type. In the absence of voltage, the mirror 12 is transparent or semi-transparent.

[0046] In order to control the current state of the mirror 12, control means are integrated into the vehicle 10 so as to control the state of the mirror 12 between the transparent state and the reflective state. These control means are, for example, arranged between an on-board system of the vehicle 10 such as an infotainment system, known as an IVI (In-Vehicle Infotainment) system, the camera 11 and the mirror 12.

[0047] The system comprising the control means, the mirror 12, and the camera 11 then forms a vision system. According to one particular embodiment, the vision system is juxtaposed with a head-up display system or even integrated into a head-up display system. Indeed, a head-up display system positioned between the steering wheel 14 and the windshield 13, which includes the vision system, is then judiciously placed in the vehicle 10.

[0048] A vision system control process is for example implemented by a computer on board the vehicle 10, for example by the computer of the IVI system, called the IVI computer, or by the device 4 of [Fig.4], which is connected to the vision system control means.

[0049] According to a particular embodiment, in a first operation, initial data representing an image data request are received, for example by the IVI computer. The initial data makes it possible to determine which of the two observed environments should be the subject of the image content, that is to say, to determine whether the image data represent a three-dimensional scene corresponding to the portion of road in front of the vehicle 10 or a three-dimensional scene corresponding to the passenger compartment of the vehicle 10 and the face 99a.

[0050] The first data is, for example, emitted by a computer of one of the previously described embedded systems. Indeed, the various systems of the vehicle 10, as well as the communication interfaces, are each controlled by one or more computers. These computers form, for example, a multiplexed architecture for the implementation of various services useful for the proper functioning of the vehicle and for assisting the driver and / or passengers of the vehicle in controlling the vehicle 10 via the control of the embedded system(s) in the vehicle 10. The computers communicate and exchange data with each other via one or more computer buses, for example, a CAN (Controller Area Network) data bus, or a CAN FD (Controller Area Network Flexible Data-Rate) data bus. FlexRay (according to ISO 17458), LIN (from the English "Local Interconnect Network" or in French "Réseau interconnecté local") or Ethernet (according to ISO / IEC 802-3).

[0051] In a second operation, the current state of the mirror 12 is controlled according to the first data, that is to say according to the environment to be observed among the two environments observable by the camera IL. Thus, if the first data comes from the system or the computer of the obstacle detection system, then the mirror 12 is controlled in its transparent state so as to allow the camera 11 to observe the portion of road located in front of the vehicle 10. Conversely, if the first data comes from the DMS or the computer of the DMS, then the mirror 12 is controlled in its reflective state so as to allow the camera 11 to observe the face 99a located in the passenger compartment of the vehicle 10.

[0052] In a third operation, image data is acquired by the camera 11, the control means of the vision system then controlling the camera 11 by instructing it to acquire one or more images. The image content is then representative of a three-dimensional scene unfolding in front of the vehicle 10 when the current state corresponds to the transparent state, or representative of the face of an occupant of the vehicle 10 when the current state corresponds to the reflective state.

[0053] In a fourth operation, the image data are then sent to the embedded system that sent the first data, for example via the communication bus of the vehicle 10, or recorded in a memory accessible to this same embedded system.

[0054] Such a vision system allows the camera 11 to be shared between the two aforementioned on-board systems. Thus, the number of vehicle components decreases because a camera and its control means are more numerous and complex than a mirror 12 capable of changing state and the control means associated with that mirror 12. Furthermore, the volume or space required to install an additional camera and its associated control means is greater than that required for installing the mirror 12 and its associated control means.

[0055] Fig. 2 schematically illustrates part of a passenger compartment of vehicle 10, according to a second particular and non-limiting embodiment of the present invention.

[0056] According to this second particular embodiment, the vehicle 10 includes an ambient light detection system that feeds, i.e. sends, data representative of the ambient light, for example, to an on-board automatic headlight activation system or to the IVI system so as to control a light intensity level of at least one screen associated with the IVI system or to adjust display settings of a head-up vision system connected to the IVI system.

[0057] According to this second particular embodiment, the ambient light detection system and the previously described DMS share the same camera 11. As in the first particular embodiment, the camera 11 is positioned facing the driver 99, for example between the steering wheel 14 and the windshield 13 of the vehicle 10. From this position, it is possible to observe both the face 99a and the sky or a part of the environment located above the vehicle 10 through the windshield 13. Observing the sky makes it possible, in particular, to determine ambient brightness, for example from the colorimetric or luminance data associated with the pixels of the images acquired by the camera 11.

[0058] In order to easily observe the sky or a part of the environment located above the vehicle 10, the camera 11 is, according to this second particular embodiment, arranged so as to orient its optical axis Ao vertically and upwards in the reference frame associated with the vehicle 10, that is to say along the vertical direction associated with the vehicle 10, thus allowing it to observe the sky through the windshield 13. The sky is then located in the first field of vision, also called the direct field of vision lia, associated with the camera 11, the first field of vision lia having as its principal axis the optical axis Ao of the camera 11.

[0059] In order to also observe face 99a from this position, a mirror 12 is positioned in front of the camera 11, i.e., within its field of vision. The mirror 12 is then positioned so as to reflect incident light rays from face 99a towards the lens of the camera 11. An angle α is thus defined between the optical axis Ao and the plane of the mirror 12 so as to define the orientation, relative to the system comprising the camera 11 and the mirror 12, of a second field of vision, also called the reflected field of vision 11b, having as its principal axis a reflected axis AR oriented towards face 99a. The angle α is then between 30 and 60°, for example close to 45°.

[0060] In order to allow the camera to observe both the sky and the face 99a from its position, the mirror 12 is configured to take two states comprising a reflective state in which the mirror 12 reflects a set of incident light rays and a transparent state in which the mirror 12 lets through at least a part of the set of incident light rays.

[0061] Note that the vision system is for example juxtaposed or integrated with the head-up vision system on board the vehicle 10, the head-up vision system being for example part of the IVI system.

[0062] According to a third particular embodiment illustrated in [Fig.3], the mirror 12 is integrated into the windscreen 13 so as to further increase the compactness of the vision system but also so as to avoid observing a three-dimensional scene both through the mirror 12 in its transparent state and through the windscreen 13, avoiding for example untimely reflections of light on the windscreen 13.

[0063] A vision system control process is for example implemented by a computer on board the vehicle 10, for example by the computer of the IVI system, called the IVI computer, or by the device 4 of [Fig.4], which is connected to the vision system control means.

[0064] According to a particular embodiment, in a first operation, initial data representing an image data request are received, for example by the IVI computer. The initial data makes it possible to determine which of the two observed environments should be the subject of the image content, that is to say, to determine whether the image data represent a three-dimensional scene corresponding to the sky above the vehicle 10 or a three-dimensional scene corresponding to the passenger compartment of the vehicle 10 and the face 99a.

[0065] The first data are emitted for example by a computer of the light detection system or of the IVI computer or by the DMD or its computer.

[0066] In a second operation, the current state of the mirror 12 is controlled according to the first data, that is to say according to the environment to be observed among the two environments observable by the camera 11. Thus, if the first data comes from the system or the computer of the light detection system, then the mirror 12 is controlled in its transparent state so as to allow the camera 11 to observe the sky located above the vehicle 10. Conversely, if the first data comes from the DMS or the computer of the DMS, then the mirror 12 is controlled in its reflective state so as to allow the camera 11 to observe the face 99a located in the passenger compartment of the vehicle 10.

[0067] In a third operation, image data is acquired by the camera 11, the control means of the vision system then controlling the camera 11 by instructing it to acquire one or more images. The image content is then representative of a view of the sky located above the vehicle 10 when the current state corresponds to the transparent state, or representative of the face of an occupant of the vehicle 10 when the current state corresponds to the reflective state.

[0068] As with the first particular embodiment, in a fourth operation, the image data is then sent to the embedded system that sent the first data, for example via the communication bus of the vehicle 10, or recorded in a memory accessible to this same embedded system.

[0069] Such a vision system then makes it possible to share the camera 11 for a light detection system, for example for the IVI system, and for the DMS.

[0070] Fig. 4 schematically illustrates a device 4 configured to control a vision system on board a vehicle, for example the vision system on board the vehicle 10. The device 4 corresponds for example to a device on board the vehicle 10, for example a computer of the IVI system.

[0071] Device 4 is, for example, configured to carry out the operations described opposite [Fig. 1] to [Fig. 3] and / or the steps of the process described opposite [Fig. 5]. Examples of such a device 4 include, but are not limited to, embedded electronic equipment such as a vehicle's on-board computer, an electronic control unit such as an ECU (Electronic Control Unit), a smartphone, a tablet, or a laptop computer. The elements of device 4, individually or in combination, can be integrated into a single integrated circuit, into several integrated circuits, and / or into discrete components. Device 4 can be implemented in the form of electronic circuits or software (or computer) modules, or a combination of electronic circuits and software modules.

[0072] The device 4 comprises one (or more) processor(s) 40 configured to execute instructions for carrying out the steps of the process and / or for executing instructions from the software embedded in the device 4. The processor 40 may include integrated memory, an input / output interface, and various circuits known to those skilled in the art. The device 4 further comprises at least one memory 41, for example, volatile and / or non-volatile memory, and / or includes a memory storage device that may include volatile and / or non-volatile memory, such as EEPROM, ROM, PROM, RAM, DRAM, SRAM, flash, magnetic disk, or optical disk.

[0073] The computer code of the embedded software(s), including the instructions to be loaded and executed by the processor, is for example stored on memory 4L

[0074] According to various particular and non-limiting embodiments, the device 4 is coupled in communication with other similar devices or systems and / or with communication devices, for example a TCU (Telematic Control Unit), for example via a communication bus or through dedicated input / output ports.

[0075] According to a particular and non-limiting embodiment, the device 4 includes a block 42 of interface elements for communicating with external devices. The interface elements of block 42 include one or more of the following interfaces: - radio frequency RF interface, for example of the Wi-Fi® type (according to IEEE 802.11), for example in the 2.4 or 5 GHz frequency bands, or of the Bluetooth® type (according to IEEE 802.15.1), in the 2.4 GHz frequency band, or of the Sigfox type using UBN (Ultra Narrow Band) radio technology, or LoRa in the 868 MHz frequency band, LTE (Long-Term Evolution), LTE-Advanced; - USB interface (from the English "Universal Serial Bus" or "Universal Serial Bus" in French); - HDMI interface (from the English "High Definition Multimedia Interface", or "High Definition Multimedia Interface" in French); - LIN interface (from the English "Local Interconnect Network", or in French "Réseau interconnecté local").

[0076] According to another particular and non-limiting embodiment, the device 4 includes a communication interface 43 which allows communication to be established with other devices (such as other computers in the embedded system) via a communication channel 430. The communication interface 43 corresponds, for example, to a transmitter configured to transmit and receive information and / or data via the communication channel 430. The communication interface 43 corresponds, for example, to a wired network of the CAN (Controller Area Network) type, CAN FD (Controller Area Network Flexible Data-Rate), FlexRay (standardized by ISO 17458) or Ethernet (standardized by ISO / IEC 802-3).

[0077] According to a particular and non-limiting embodiment, the device 4 can provide output signals to one or more external devices, such as a display screen 440, touch or not, one or more loudspeakers 450 and / or other peripherals 460 (projection system) via output interfaces 44, 45 and 46 respectively. According to a variant, one or more of the external devices is integrated into the device 4.

[0078] Figure 5 illustrates a flowchart of the different steps in a method for controlling a vision system embedded in a vehicle, for example in vehicle 10 of Figures 1 to 3, according to a particular and non-limiting embodiment of the present invention. The method is implemented, for example, by a device embedded in vehicle 10 or by device 4 of Figure 4.

[0079] In a first step 51, initial data representing a request for image data are received. The initial data include information defining the environment represented in the required or expected image data from among two environments observable by the camera 11.

[0080] In a second step 52, a current state of the mirror 12 is controlled according to the first data.

[0081] In a third step 53, image data are acquired by the camera 11 and then represent the environment designated through the first data.

[0082] In a fourth step 54, image data is transmitted to an on-board system of the vehicle 10.

[0083] According to one variant, the variants and examples of the operations described in relation to Figures 1 to 3 apply to the steps of the process in [Fig.5].

[0084] Of course, the present invention is not limited to the embodiments described above but extends to a vehicle vision system which would include additional elements without going out of the scope of the present invention.

[0085] The present invention also relates to a vehicle, for example an automobile or more generally an autonomous land-based motor vehicle, comprising a vision system as shown opposite Figures 1 to 4.

Claims

Demands

1. Vehicle-mounted vision system (10), said system comprising: - a mirror (12) configured to take two states comprising a reflective state according to which said mirror (12) reflects a set of incident light rays and a transparent state according to which said mirror (12) allows at least a part of said set of incident light rays to pass through, - means for controlling a current state of the mirror (12) among said two states, and - a camera (11) comprising said mirror (12) in its field of vision configured to acquire image content as a function of said current state.

2. Vision system according to claim 1, wherein the mirror (12) is an electrochromic mirror.

3. Vision system according to claim 1 or 2, which is positioned behind a steering wheel (14) of the vehicle (10).

4. Vision system according to any one of claims 1 to 3, which belongs to a head-up vision system.

5. Vision system according to any one of claims 1 to 3, wherein the mirror (12) is integrated into a windscreen (13) of the vehicle (10).

6. Vision system according to any one of claims 1 to 5, wherein an optical axis of the camera (12) is arranged horizontally, said image content being representative of a three-dimensional scene taking place in front of the vehicle (10) when said current state corresponds to said transparent state.

7. A vision system according to any one of claims 1 to 5, wherein an optical axis of the camera (12) is arranged vertically, said image content being representative of the sky when said current state corresponds to said transparent state.

8. Vision system according to any one of claims 1 to 7, wherein said image content is representative of a face of a vehicle occupant (10) when said current state corresponds to said reflective state.

9. Vehicle (10) comprising a vision system according to any one of claims 1 to 8.

10. A method for controlling a vision system according to any one of claims 1 to 8, said method being implemented by at least one processor and comprising the following steps: - receiving (51) first data representative of a request for image data representative of one environment among two environments observable by the camera (11); - controlling (52) a current state of the mirror (12) as a function of said first data; - acquiring (53) said image data by the camera (11); and - transmitting (54) said image data to an on-board system of the vehicle (10) carrying said vision system.

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