• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an imaging device (100) comprising: - an image sensor (130); - an optical system (110) having a controllable focal length liquid lens adapted to form on the image sensor (130); ) an image of an external environment (E) viewed by the imaging device (100) through an outer face (113) of the optical system (110), - a control module (120) adapted to control the liquid lens successively at two different focal lengths, to obtain a clear image of a zone of the external environment (E) distant from the outer face (113) of the optical system (110), then a sharp image of said outer face (113). and an analysis module (126) for detecting an optical path altering element at the outer face (113) of the optical system (110) by analyzing said second image. An associated control method, and an automobile vehicle (200) equipped with such an imaging device are also described.
    公开号:FR3039731A1
    申请号:FR1557380
    申请日:2015-07-31
    公开日:2017-02-03
    发明作者:Nicolas Pinchon；Denis Garnier；Caroline Robert
    申请人:Valeo Schalter und Sensoren GmbH；
    IPC主号:
    专利说明:

    Imaging device, associated control method, and motor vehicle equipped with such an imaging device
    Technical field to which the invention relates
    The present invention generally relates to the field of imaging devices.
    It relates more particularly to an imaging device and an associated control method, for detecting an element altering an optical path at an outer face of an optical system of the imaging device.
    It applies particularly advantageously in a motor vehicle, in which such an imaging device can visualize a road environment of the vehicle, and whose optical system has an outer face particularly exposed to projections, dirt, and various degradations.
    Technological background
    The presence of an element altering an optical path at an outer face of an optical system, for example a mass of material, such as a drop of water or dirt, degrades the quality of the images formed through or by this optical system.
    For a camera embedded in a motor vehicle, the outer face of the optical system of the camera is particularly exposed, either to projections, dirt and degradations when the camera is installed outside the vehicle, or to the formation of mist when the camera is installed in the passenger compartment of the vehicle. In addition, a driver of this vehicle rarely has the opportunity to clean such an outer face while driving.
    The document US 2014/0036084 describes a camera installed in the passenger compartment of a motor vehicle, behind the windshield of this vehicle, and to obtain images of a road environment facing the vehicle. This camera includes an image sensor associated with a lens including an adjustable liquid focal lens. This document also describes that one of the applications of the adjustable nature of the focal length of this lens is to detect objects at different distances from the camera, for example to detect road signs and detect rain on the windshield of the vehicle.
    Object of the invention
    In this context, the present invention proposes an imaging device comprising: an image sensor; an optical system, optically associated with the image sensor, comprising a liquid lens of controllable focal length, presenting, in contrast to the image sensor, an outer face substantially perpendicular to an optical axis of the optical system and through which the device displays an external environment, the optical system being adapted to form an image of this external environment on the image sensor, and a control module adapted to control the liquid lens at a first focal length, so as to form on the image sensor a clear image of an area of the external environment remote from the outer face of the optical system, and for trigger a shot to obtain a corresponding first image.
    According to the invention, the control module is furthermore designed to control the liquid lens at a second focal length, so as to form on the image sensor a clear image of the external face of the optical system, and to trigger a shooting to obtain a corresponding second image, and the imaging device comprises an analysis module adapted to detect an element altering an optical path at the outer face of the optical system, by analyzing said second image. .
    Such an element altering an optical path at the outer face of the optical system disrupts or even prevents obtaining images of this external environment by the imaging device.
    Thanks to the invention, this imaging device is adapted to detect one or more such elements in a particularly efficient and fast manner in terms of calculation time, since this detection is performed by analyzing an image at least partially net of this external face. This device is also adapted to perform this detection while providing an observation function of said external environment, in particular by obtaining said first image. The use of a liquid lens with a controllable focal length is particularly interesting here. Indeed, its focal length can be changed very quickly, which makes it possible to change the focus setting of the device just as quickly. The time it takes to focus on the area of the external environment distant from the outer face of the optical system, to focus on that external face, and then to return to focus on that remote area said outer face can thus be advantageously short.
    The aforementioned function of detecting an optical path altering element at the outer face of the optical system can thus be ensured while leaving the imaging device available to the maximum for the acquisition of images. one or more zones of said external environment distant from this outer face. In particular, when the imaging device is embedded in a motor vehicle, it is adapted to jointly perform this detection of an optical path altering element at the outer face of the optical system, and a visualization of a road environment of this vehicle for the purpose of driving assistance.
    An element altering an optical path at the outer face of the optical system may comprise a mass of matter situated on this external face, such as a drop of water, a small mass of snow, frost or mist, or dirt such as a splash of mud or a trace of rust.
    Thus, to detect a mass of material present on the external face of the optical system of the imaging device is particularly interesting, because this detection makes it possible in particular to appropriately control means for eliminating this cluster, or still allows to issue a signal informing of the presence of this cluster, and therefore reduced performance in terms of imaging. The element altering an optical path at the outer face of the optical system may also comprise an irregularity of this external face such as a scratch formed on this face, or a relief formed following an impact on this external face. Other non-limiting and advantageous features of the imaging device according to the invention are as follows: the control module is designed to control the liquid lens at at least one focal value making it possible to form on the image sensor a clear image of an area of the external environment remote from the outer face of the optical system, for a period longer than the period during which it controls the liquid lens at said second focal length; the control module is designed to control the liquid lens at the second focal length for a time interval of less than 0.3 seconds; the control module is designed, when it controls the liquid lens at the first focal length, to trigger a plurality of shots so as to obtain a plurality of net corresponding images of said zone distant from the outer face of the camera; optical system; said external face is the external face of a protective window separating the external environment from the imaging device; the analysis module is designed to, when it has detected an element altering an optical path at the external face of the optical system, generate a signal indicating the presence of this element; said element altering an optical path at the external face of the optical system comprises a mass of material situated on this external face; and the control module is designed, when the analysis module has detected a mass of material situated on the external face of the optical system, to generate a signal adapted to control means for eliminating this cluster from said external face. The invention also proposes a motor vehicle comprising an imaging device as described above. The invention also proposes a method of controlling an imaging device comprising an optical system having an external face, comprising steps of: - controlling a liquid lens at a first focal length, so as to form on a an image sensor, a clear image of a zone of an environment outside the imaging device, distant from the external face of the optical system, and of triggering a shooting so as to obtain a corresponding first image, - Controlling the liquid lens at a second focal length, so as to form on the image sensor a clear image of the outer face of the optical system, - triggering a shot so as to obtain a second corresponding image , and - detecting an optical path altering element at the outer face of the optical system, by analyzing this second image.
    The optional features presented above for the device can also be applied to such a method.
    Detailed description of an example of realization
    The following description with reference to the accompanying drawings, given as non-limiting examples, will make it clear what the invention consists of and how it can be achieved.
    In the accompanying drawings: FIG. 1 schematically represents a part of a motor vehicle equipped with an exemplary detection device according to the invention, and FIG. 2 schematically represents an example of a control method according to the invention, implemented here in the detection device of Figure 1.
    In Figure 1, we can see the main elements of an imaging device 100, according to the teachings of the invention. It comprises in particular: an image sensor 130, and an optical system 110 optically associated with the image sensor 130, making it possible to form on the latter an image of an external environment E facing it.
    More particularly, the imaging device 100 here comprises a video camera integrating this image sensor 130 and this optical system 110.
    As will be explained below, this imaging device 100 is designed to detect an optical path altering element at an outer face 113 of its optical system 110, through which it visualizes this external environment E.
    This optical path altering element at this outer face 113 here comprises a cluster of parasitic material 300 present thereon. This element could also include an irregularity of this outer face 113, for example a scratch formed on it.
    Such a pile of material 300, for example a drop of water, a small pile of snow, frost or mist, or a dirt such as a splash of mud, present on the outer face 113 of the optical system 110 disrupts or prevents the obtaining of images of this external environment E by the imaging device 100. A cluster of material 300 present on the outer face 113 of its optical system 110 is considered here as a parasite.
    The detection of this cluster of parasitic material 300 is based on obtaining and analyzing, by the imaging device 100, an image of the external face 113 of its optical system 110, as is detailed below.
    The image sensor 130 of the imaging device 100 is here a two-dimensional image sensor, for example a CCD image sensor (English acronym for "Charge-Coupled Device"), that is to say device to charge transfer) or CMOS (acronym for "Complementary Metal-Oxide Semiconductor", that is to say semiconductor complementary metal oxide).
    The optical system 110 associated with it is centered on an optical axis Z.
    The outer face 113 of this optical system 110 is located opposite the image sensor 130, and extends substantially perpendicularly to this optical axis Z.
    More specifically, the optical system 110 here comprises an imaging objective 111 (centered on the optical axis Z) and a protective window 112, located opposite to the image sensor 130. This protective window 112 closes here a housing 140 in which are housed the image sensor 130 and the imaging lens 111, the housing 140 thus protecting the latter.
    The outer face 113 of the optical system 110, through which the imaging device 100 visualizes its external environment E, thus corresponds here to the outer face of the protective window 112.
    In a variant, the imaging device is made without a window, and the outer face of its optical system then corresponds directly to the front face of its imaging lens, that is to say to the front face of a lens frontal of this imaging objective. The imaging device can also be made without a protective case.
    The optical system 110 of the imaging device 100 here comprises a liquid lens (not shown), that is to say a deformable lens containing a fluid, the focal length f is controllable. This liquid lens is here integrated with the imaging objective 111.
    The value of the focal length f of the liquid lens can be controlled by an electrical signal Vf, for example a voltage applied between two electrodes of the liquid lens.
    The optical system 110 forms on the image sensor a clear image of a zone of the external environment E, situated at a given distance from the imaging objective 111. This distance depends on the focus setting of this image. imaging objective 111, which is achieved here by controlling the focal length f of the liquid lens.
    In a variant, the optical system comprises, in addition to the liquid lens, additional controllable focusing means, for example comprising displacement means, for moving a lens of the optical system relative to the image sensor. These displacement means may for example comprise an electromechanical system, or a piezoelectric actuator.
    The imaging device 100 is embedded here in a motor vehicle 200.
    More specifically, it is disposed here inside and in front of this vehicle 200, behind an opening 211 formed in the front part of the body 210 of the vehicle 200, so that the road environment facing the vehicle 200 can be viewed by this imaging device 100. The protective window 112 of the imaging device 100 is engaged in said opening 211 of the body 210, which closes.
    Here, the external environment E of the imaging device 100 thus corresponds to the road environment facing the vehicle 200 automobile.
    Alternatively, the imaging device is installed in the rear part, or on one side of the vehicle, so as to fulfill the role of an observation camera of a rear or side environment of the motor vehicle.
    According to another variant, the imaging device is fixed in a passenger compartment of the motor vehicle. Its optical axis is then oriented towards the outside of this cabin, so that the road environment of the vehicle can be visualized by the imaging device, through one of the windows defining this cabin, for example through the windshield of the vehicle.
    According to yet another variant, the imaging device is installed on or in a building, or in a public place such as a street, instead of being embedded in a motor vehicle.
    The imaging device 100 also comprises a control module 120 adapted in particular to control the value of the focal length of the liquid lens, and an analysis module 126 designed in particular for analyzing images obtained by means of the image sensor. 130.
    The control module 120 of the imaging device 100 here comprises: a processor 121 carrying out logical operations, for example a microprocessor, a storage module 122, with which the processor 121 can exchange data, the module of aforesaid analysis 126, here comprising the processor 121 and the storage module 122, and a conditioning module 123, for example a digital-to-analog converter followed by a voltage amplifier, which makes it possible to convert a command given by the processor 121. in digital form in one signal the electrical signal Vf adapted to control the liquid lens.
    The processor 121 is adapted to control the image sensor 130, so that the latter acquires data representative of an image formed on this sensor, and is adapted to receive from the image sensor 130 said data.
    The processor 121 is also adapted to control the focal length of the liquid lens, via the conditioning module 123.
    Here, the processor 121 is also optionally adapted to receive additional input signals (not shown) from sensors or devices on the vehicle 200 relating to the operation of the motor vehicle or its road environment.
    The processor 121 of the control module 120 is also adapted to control means 150 for eliminating material clusters 300 present on the outer face 113 of the optical system 110. These elimination means 150 here comprise a device for heating this face. external 113, for example by means of resistors or heating electric son disposed near this outer face. These elimination means 150 may also comprise: motorized wipers, and / or a system for spraying a cleaning liquid on this external face 113, and / or an actuator, for example piezoelectric, adapted to vibrate said outer face 113 at frequencies of the ultrasound range, so as to cause a vaporization of a cluster of liquid material 300 present on this outer face 113.
    These elimination means 150 can be integrated directly into the imaging device 100.
    The imaging device 100 is adapted to generate an output signal 102, in particular as a function of the data representative of images obtained by means of the optical system 110 and the image sensor 130.
    This output signal 102 comprises in particular: a signal representative of the detection of material clusters 300 on the external face 113 of the optical system 110 of the imaging device 100, and data representative of at least one clear image of a zone of the external environment E distant from the outer face 112 of the optical system 110, and / or data obtained by analysis of such an image.
    This output signal 102 may also comprise raw data directly representative of an image of the external face 113 of the optical system 110 obtained by the imaging device 100.
    Here, the output signal 102 also comprises at least one control signal adapted to trigger a controllable functionality of the vehicle 200. It is transmitted for this purpose to different members of the vehicle 200.
    In particular, it is transmitted here to signaling means 240 of the presence of material clusters 300 on the observation glazing 210 include for example a light device, a display device such as a screen, or a device for transmitting an audible signal, so as to warn a driver of the vehicle 200 of the presence of material clusters 300, for example drops of water, on the outer face 113 of the optical system 110 of the device imagery 100.
    Here, the output signal 102 is also transmitted to a central driving assistance unit 220 fitted to the vehicle 200, providing other driving assistance functions, such as a detection of floor markings, of panels road, or obstacles, here facing the automobile vehicle 200. This central driving assistance unit 220 can also trigger other controllable functions of the vehicle, such as speed control functions, or power steering, or management of vehicle lighting systems 200.
    Here, the imaging device 100 and the central control unit 220 are separate.
    In a variant, the control module and the analysis module of the imaging device are integrated in the central driving assistance unit.
    Moreover, the output signal can also be transmitted directly to vehicle actuation means, for example to an emergency braking device.
    The detection of one or more clusters of parasitic material 300 on the outer face 113 of the optical system 110 of the imaging device 100 is performed here by implementing the method shown schematically in FIG. 2 in this imaging device 100.
    During a first step E1 of this method, the control module 120: a) controls the liquid lens at a first focal length, so as to form on the image sensor 130 a clear image of a zone of the external environment E distant from the outer face 113 of the optical system 110, and b) triggers at least one shot so as to obtain a corresponding first image.
    Here, more specifically, the control module 120 triggers during this first step E1 a plurality of PVE shots of the external environment E, so as to obtain a plurality of corresponding images, in which one or more zones of this environment, remote from the outer face 113 of the optical system 100, are clearly displayed.
    Here, a zone remote from the external face 113 of the optical system 110 is designated a zone of the external environment E situated for example more than 2 cm from this external face 113. During this plurality of PVE shots, the module 120 can control the liquid lens at different focal lengths, so as to focus successively on distinct areas of the external environment E, distant from the outer face 113 of the optical system 110, and respectively located at different distances from this external face 113.
    The control module 120 drives the liquid lens and the image sensor 130 so that this first step E1 is performed in a determined duration TE. This duration is determined by the value of a variable VTE, recorded in the storage means 122. This variable VTE has a default value, for example equal to 60 seconds. Its value can be adapted during the process (in step E6), as described later.
    Here, data representative of the images obtained during this first step E1 are transmitted, via the output signal 102, to the central control unit 220.
    Also during this step E1, the analysis module 126 can also analyze these images of the external environment E of the vehicle, for the purpose of driving assistance mentioned above, and transmit the result of this analysis to the unit. central driver assistance 220.
    During the second step E2 of this method, the control module 120: a) controls the liquid lens at a second focal length, so as to form on the image sensor 130 a clear image of the external face 113 of the 110, and b) triggers at least one shot to obtain a second corresponding image.
    More precisely, here, the control module 120 triggers during this second step E2 a set of PV shots of the external face 113 of the optical system 110, so as to obtain a set of corresponding net images of this external face. 113 (this set of images can possibly include only one image).
    The control module 120 drives the liquid lens and the image sensor 130 so that this second step E2 is performed in a determined duration TV, and so as to obtain a determined number N of clear images of this external face. 113.
    This number N of images and this duration TV are respectively determined by the value of a variable VN, and a variable VTV, recorded in the storage means 122.
    Preferably, the control module 120 controls the liquid lens at said second focal length value for a duration less than (or, as here, less than one hundredth of) the duration during which it controls the liquid lens at at least one focal value allowing forming on the image sensor 130 a clear image of a zone of the external environment E remote from the outer face 113 of the optical system 110.
    The imaging device 100 is thus available almost permanently for the observation of its external environment E, and here for the driving assistance functions mentioned above, which is particularly interesting.
    More particularly, here, the control module 120 drives the liquid lens and the image sensor 130 so that the TV duration of the second step is less than the duration TE of the first step.
    Still to ensure maximum availability of the imaging device 100 for observation of its external environment E, it is furthermore provided that the control module 120 controls the liquid lens at the second focal value for a shorter time interval. at 0.3 seconds.
    More specifically, here, the control module 120 drives the liquid lens and the image sensor 130 so that the TV duration of the second step is less than 0.3 seconds.
    The variables VN and VTV, which determine the number N of images obtained during this second step, as well as its duration TV, each have a default value, for example VN = 1 and VTV = 0.033 seconds. These values can be adapted during the process (in step E6), as described later.
    During the following step E3, the analysis module 126 analyzes the set of images of the external face 113 of the optical system 110 obtained during the second step E2, so as to detect one or more clusters of material 300. parasites on the outer face 113 of the optical system 110 of the imaging device 100. The analysis of this set of images can be performed for example by detecting, in each of these images, an image portion having a gradient high value. Indeed, when a cluster of material 300 is present on this outer face 113, this cluster is clearly displayed in one of the images of this set, this image then presenting, at the image level of this cluster, a high value gradient. On the contrary, in the absence of clusters of material 300 on this outer face 113, as it is transparent, these images do not have any net elements, and therefore do not include a zone having a high value gradient.
    As a variant, the analysis of this set of images can be carried out by detecting components corresponding to high spatial frequencies, by shape recognition, or by a method based on an artificial neural network.
    In the next step E4, the analysis module 126 determines whether a cluster of material 300 has been detected on the outer face 113 of the optical system 110, in the previous step E3.
    When such a mass of material has not been detected in step E3, the method continues with a step E7 in which the control module assigns each of the variables VN, VTV and VTE its default value. For example VN = 1, VTV = 0.033 seconds and VTE = 60 seconds.
    At the end of this step E7, the process continues with step E1 described above.
    During the subsequent execution of the steps E1 and E2, the default values of the variables VN, VTV and VTE are then used by the control module 120 to carry out the series of PVE shots of the external environment E, and the set of PV shots of the outer face 113 of the optical system 110 of the imaging device 100.
    On the other hand, when a mass of material 300 has been detected on the observation window during step E3, the method continues with step E5, during which the control module 120 controls the means of observation. 150 elimination, so as to eliminate the material cluster (s) 300 detected on this external face 113. In step E5, when the imaging device does not have such means of elimination, or does not have the possibility to control such removal means, the control module 120 controls said signaling means 240, so as to warn the driver of the vehicle 200 the presence of these clusters.
    The presence of such clusters on the outer surface 113 of the optical system 110 of the imaging device 100 may reduce the performance of the driver assistance functions presented above, based on an analysis of the images of the road environment facing the vehicle. 200 (obtained here in step E1). It is therefore interesting, as is the case here, to warn a driver of the vehicle 200 of the presence of such clusters, when the imaging device 100 has no means to eliminate them.
    It can also be optionally provided that the driving assistance functions mentioned above are suspended during this step E5, when the imaging device does not have means for eliminating clumps of material. 300 present on the outer face, or does not have the ability to control such removal means.
    It can also be provided that: - these driving assistance functions are suspended, and / or that - the control module 120 controls said signaling means 240, so as to warn the driver of the vehicle 200 of the presence of these clusters until the analysis module 126 determines, during a subsequent execution of the steps E3 and E4, that the optical system 110 of the imaging device 100 does not have a clump of parasitic material 300 on its external face 113.
    During this step E5, the control module 120 can also, optionally, transmit to the central control unit 220, the result of the analysis of the images of the observation glazing made at the step E3, or data representative of these images.
    In the next step E6, the control module 120 assigns each of the variables VN, VTV and VTE a modified value, so as to: - reduce the duration separating the set of previous PV shots from the external face 113 of the optical system 110 (in the previous step E2) and the set of next PV shots of this external face 113 (when the step E2 is performed again), and / or to - increase the number N of images that will be obtained during this set of next PV shots.
    The sensitivity and reliability of detection of material clusters 300 present on the observation glazing by analysis of the set of images obtained during the next set of PV shots are thus increased, which makes it possible to verify effectively the presence of the cluster (s) of material 300 parasites detected by analysis of the set of images obtained during the previous PV set.
    Thus increasing this sensitivity and reliability of detection when a cluster has been previously detected is particularly interesting because it allows to best adapt, depending on the situations encountered, the distribution of the resources of the imaging device 100 between its detection functions. clusters of material 300 parasites on the outer face 113 of its optical system 110, and its observation functions of the external environment E. By way of illustration, the values of the variables VN, VTV and VTE can be modified as follows during this step E6: VN = 3, VTV = 0.099 seconds and VTE = 2 seconds.
    At the end of this step E6, the process continues with step E1 described above.
    When the steps E1 and E2 are subsequently performed, the modified values of the variables VN, VTV and VTE are then used by the control module 120 to carry out the PVE series of pictures of the external environment E, and the set of PV shots of the outer face 113 of the optical system 110 of the imaging device 100.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    An imaging device (100) comprising: - an image sensor (130); - an optical system (110), optically associated with the image sensor (130), having a controllable liquid focus lens, and having , opposite the image sensor (130), an outer face (113) substantially perpendicular to an optical axis (Z) of the optical system (110) and through which the imaging device (100) displays an environment outside (E), the optical system (110) being adapted to form an image of this external environment (E) on the image sensor (130), - a control module (120) adapted to control the liquid lens at a first focal length, so as to form on the image sensor (130) a sharp image of a zone of the external environment (E) remote from the outer face (113) of the optical system (110), and for to trigger a shooting so as to obtain a corresponding first image, characterized in e that the control module (120) is further adapted to control the liquid lens at a second focal length, so as to form on the image sensor (130) a clear image of the external surface (113) of the system optical (110), and for triggering a shot to obtain a corresponding second image, and in that the imaging device (100) further comprises an analysis module (126) adapted to detect an altering element an optical path at the outer face (113) of the optical system (110), by analyzing said second image.
    [2" id="c-fr-0002]
    An imaging device (100) according to claim 1, wherein the control module (120) is adapted to control the liquid lens at at least one focal length for forming on the image sensor (130) a sharp image of a zone of the external environment (E) remote from the outer face (113) of the optical system (110), for a time longer than the duration during which it controls the liquid lens at said second focal length.
    [3" id="c-fr-0003]
    An imaging device (100) according to one of claims 1 and 2, wherein the control module (120) is adapted to control the liquid lens at the second focal length for a time interval of less than 0 , 3 seconds.
    [4" id="c-fr-0004]
    The imaging device (100) according to one of claims 1 to 3, wherein the control module (120) is designed, when it controls the liquid lens at the first focal length, to trigger a plurality of shot to obtain a plurality of net corresponding images of said area remote from the outer face (113) of the optical system (110).
    [5" id="c-fr-0005]
    5. An imaging device (100) according to one of claims 1 to 4, wherein said outer face (113) is the outer face of a protective window (112) separating the external environment (E) of the device imaging (100).
    [6" id="c-fr-0006]
    The imaging device (100) according to one of claims 1 to 5, wherein the analysis module (126) is adapted to detect an optical path altering element at the outer surface. (113) of the optical system (110), generating a signal indicating the presence of that element.
    [7" id="c-fr-0007]
    The imaging device (100) according to one of claims 1 to 6, wherein said optical path altering element at the outer face (113) of the optical system (110) comprises a cluster of material (300). located on this outer face (113).
    [8" id="c-fr-0008]
    An imaging device (100) according to claim 7, wherein the control module (120) is adapted to, when the analysis module (126) has detected a mass of material (300) located on the outer face (113) of the optical system (110), generating a signal adapted to control means for eliminating (150) this cluster of said outer face (113).
    [9" id="c-fr-0009]
    9. Vehicle (200) automobile comprising an imaging device (100) according to one of claims 1 to 8.
    [10" id="c-fr-0010]
    A method of controlling an imaging device (100) having an optical system (110) having an outer surface (113), comprising steps of: - controlling a liquid lens at a first focal length, for forming on an image sensor (130) a sharp image of an area of an environment external to the imaging device (100) remote from the outer surface (113) of the optical system (110), and - triggering a shooting so as to obtain a first corresponding image, characterized in that it comprises the following steps: - control of the liquid lens at a second focal length, so as to form on the sensor of images (130) a sharp image of the outer face (113) of the optical system (110), - triggering a shot to obtain a corresponding second image, and - detecting an optical path altering element. level of the external face (113) of the system optics (110), by analyzing this second image.
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    同族专利:
    公开号 | 公开日
    WO2017021377A1|2017-02-09|
    FR3039731B1|2017-11-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JP2001109038A|1999-10-07|2001-04-20|Sumitomo Electric Ind Ltd|Image pickup device|
    EP1819167A2|2006-02-09|2007-08-15|Delphi Technologies, Inc.|Method for determining windshield condition and an improved vehicle imaging system|
    US20070272884A1|2006-05-16|2007-11-29|Denso Corporation|Raindrop sensor and wiper controller having the same|
    US20140036084A1|2011-04-18|2014-02-06|Magna Electronics, Inc.|Vehicular camera with variable focus capability|
    FR3085081A1|2018-08-16|2020-02-21|Psa Automobiles Sa|METHOD FOR REAL-TIME CORRECTION OF DAMAGED IMAGES FROM AN ON-BOARD CAMERA WITH DIRT|
    CN110636195A|2019-09-24|2019-12-31|Oppo广东移动通信有限公司|Shooting module, shooting method and mobile terminal|
    CN112461853B|2020-10-30|2021-07-27|珠海市奥德维科技有限公司|Automatic focusing method and system|
    法律状态:
    2016-07-29| PLFP| Fee payment|Year of fee payment: 2 |
    2017-02-03| PLSC| Publication of the preliminary search report|Effective date: 20170203 |
    2017-07-31| PLFP| Fee payment|Year of fee payment: 3 |
    2018-07-27| PLFP| Fee payment|Year of fee payment: 4 |
    2019-07-31| PLFP| Fee payment|Year of fee payment: 5 |
    2020-07-31| PLFP| Fee payment|Year of fee payment: 6 |
    2021-07-29| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1557380A|FR3039731B1|2015-07-31|2015-07-31|IMAGING DEVICE, CONTROL METHOD THEREOF, AND MOTOR VEHICLE EQUIPPED WITH SUCH IMAGING DEVICE|FR1557380A| FR3039731B1|2015-07-31|2015-07-31|IMAGING DEVICE, CONTROL METHOD THEREOF, AND MOTOR VEHICLE EQUIPPED WITH SUCH IMAGING DEVICE|
    PCT/EP2016/068346| WO2017021377A1|2015-07-31|2016-08-01|Imaging device, associated control method, and motor vehicle equipped with such an imaging device|
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