CN112911096A - Image shooting device, light supplementing module and equipment - Google Patents

Abstract

The embodiment of the application discloses image shooting device, light filling module and equipment relates to image monitoring and shoots technical field, and image shooting device includes: the shell is equipped with formation of image module and light filling module in the shell, the light filling module is located the lateral part of formation of image module, the light filling module is used for forming different illumination intensity's first light filling region and second light filling region at least, and the illumination intensity in second light filling region is less than the illumination intensity in first light filling region, and first light filling region and second light filling region respectively have at least that the subregion with the field of view scope of formation of image module overlaps. Through the light filling module forms two light filling regions of different illumination intensity, can give the light filling of suitable illumination intensity respectively to corresponding shooting object, for example people's face and license plate, can assist to improve image shooting quality to a certain extent at least to be convenient for improve the recognition effect of vehicle and people's face.

Description

Image shooting device, light supplementing module and equipment

Technical Field

The invention relates to the technical field of image monitoring, in particular to an image shooting device, a light supplementing module and equipment.

Background

In a vehicle surveillance scene, for example, some vehicles or equipment such as a barrier gate are provided with an image surveillance device for surveillance of other vehicles and related drivers and passengers. When the image monitoring device is insufficient in ambient light illumination at night, if clear information such as license plate numbers and vehicle colors and facial features of drivers and passengers in front rows are to be acquired, in order to guarantee follow-up vehicle information and face recognition effects, the monitoring camera device needs to be provided with light supplementing equipment for supplementing light so as to acquire clear images.

The inventor finds out in the process of realizing the invention: because the face recognition function and the license plate recognition function need to be carried out synchronously, the license plate has obvious light sensing, the license plate can be illuminated by dim light in the night environment, and the face can be seen only by strong illumination. If the monitoring camera device adopts a mode of direct light supplement with the same brightness, the photographed image can cause the situation that when the face is clear, the recognition effect is influenced due to the fact that the license plate is over-exploded, and when the license plate is clear, the face is dark, so that the recognition effect is influenced.

Disclosure of Invention

In view of this, the embodiment of the present application provides a light supplement lamp, an image capturing device, a light supplement module and an apparatus, which can assist in improving image capturing quality at least to a certain extent, so as to facilitate subsequent improvement of recognition effects of a vehicle and a human face.

In order to achieve the purpose, the technical scheme is as follows:

the embodiment of the application provides a device is shot to image, which comprises an outer shell, be equipped with formation of image module and light filling module in the shell, the light filling module is located the lateral part of formation of image module, the light filling module is used for forming different illumination intensity's first light filling region and second light filling region at least, the illumination intensity in second light filling region is less than the illumination intensity in first light filling region, just first light filling region respectively at least with the second light filling region respectively partial region with the field of view scope of formation of image module overlaps.

Optionally, the light supplement module comprises one or more light supplement lamps, a light transmission window is arranged on a light emitting path of each light supplement lamp, the light transmission window is provided with a first light transmission area and a second light transmission area, the first light transmission area is located above the second light transmission area, and the light transmittance of the first light transmission area is greater than that of the second light transmission area; the light emitted from the first light-transmitting area forms the first light supplement area, and the light emitted from the second light-transmitting area forms the second light supplement area.

Optionally, the light supplement module comprises at least two light supplement lamps, a light transmission window is arranged on a light emitting path of each light supplement lamp, the light transmission window on the light emitting path of at least one light supplement lamp is provided with a first light transmission area and a second light transmission area, the first light transmission area is positioned above the second light transmission area, and the light transmittance of the first light transmission area is greater than that of the second light transmission area; the light emitted from the first light-transmitting area forms the first light supplement area, and the light emitted from the second light-transmitting area forms the second light supplement area.

Optionally, the second light-transmitting area of the light-transmitting window is processed by half shading.

Optionally, the semi-shading treatment includes that a second light transmission region of the light transmission window is made of a semitransparent material, or a semitransparent coating or a film is arranged on the second light transmission region.

Optionally, the light filling module includes two at least light filling lamps, be equipped with the printing opacity window on the light outgoing path of light filling lamp, the printing opacity window on the light outgoing path of one of them light filling lamp is for having the polarisation structure component that is used for the light ray that will shine to on the printing opacity window to the predetermined direction deflection outgoing, and the light of following this polarisation structure component outgoing and the partly light stack of another light filling lamp form first light filling is regional, another part light of another light filling lamp forms the second light filling is regional.

Optionally, the polarized light structure element is a polarizer, an incident surface of the polarizer is perpendicular to an optical axis of the light supplement lamp, an emergent surface of the polarizer is provided with an inclined surface, and the inclination direction of the inclined surface is consistent with the deflection direction of the emergent light.

Optionally, the polarization structure element is a polarizer, a sawtooth structure is arranged on the emergent surface of the polarizer, the sawtooth structure includes a plurality of connected tooth sockets, each tooth socket includes a first side wall and a second side wall connected with one end of the first side wall, and the inclination direction of the first side wall is consistent with the deflection direction of the emergent light.

Optionally, the polarized light structure element is a polarizer, the polarizer is obliquely arranged on a light emitting path of the light supplement lamp, and the oblique direction of the polarizer is consistent with the deflection direction of the emitted light.

Optionally, a convex lens lamp cup is arranged between the light supplementing lamp of the light-transmitting window arranged as the polarization structural element and the polarization structural element.

Optionally, the light supplement module at least comprises a light supplement lamp, the imaging module comprises a lens, at least a first separation cavity and a second separation cavity are arranged in the housing, the light supplement lamp is arranged in the first separation cavity, and the imaging module is arranged in the second separation cavity;

the shell front end has the integral type lens, the integral type lens corresponds the light filling lamp has printing opacity window district, corresponds the camera lens has camera lens printing opacity district, the shell front end corresponds at least the integral type lens, be located printing opacity window district with the regional shading portion that has between the camera lens printing opacity district.

Optionally, the length of the light shielding part is greater than or equal to the maximum horizontal distance between the incident point of the light entering the light supplementing lamp in the integrated lens from the edge of the light-transmitting window area close to the light-transmitting side of the lens and the light spot reflected to the incident point of the integrated lens from the emergent surface of the integrated lens.

Optionally, the lens transparent area and/or the transparent window area are rectangular.

Optionally, the imaging module includes an image sensor and a lens disposed in front of the image sensor, and a vertical size of an image captured by the image sensor is greater than a horizontal size of the image.

Optionally, an adhesive overflow groove is formed in the end surface of the housing for mounting the integrated lens.

Optionally, a limiting protrusion for limiting the dispensing thickness is further disposed on the end surface of the housing for mounting the integrated lens.

Optionally, when the imaging module is 2-4 meters away from the shooting object, the overlapping portion of the first light supplement area and the field of view of the imaging module is located above a predetermined position of the shooting object, and the overlapping portion of the second light supplement area and the field of view of the imaging module is located below the predetermined position of the shooting object.

Optionally, the predetermined position is a position on the shooting object, which is 0.8-1.2 m away from the ground level.

In a second aspect, a further embodiment of the present invention provides a light supplement module, including: the light filling lamp is equipped with the printing opacity window on the light outgoing path of light filling lamp, the printing opacity window be used for with light forms the regional and the second light filling region of different illumination intensity, the illumination intensity in second light filling region is less than the illumination intensity in first light filling region.

In a third aspect, a further embodiment of the present invention provides a light supplement module, including: the light-compensating lamp comprises at least two light-compensating lamps, wherein a light-transmitting window is arranged on a light emergent path of one light-compensating lamp, the light-transmitting window on the light emergent path of one light-compensating lamp is a polarization structure element which is used for deflecting and emergent light irradiating the light on the light-transmitting window to a preset direction, the light emergent from the polarization structure element and part of light of the other light-compensating lamp are overlapped to form a first light-compensating area, and the other part of light of the other light-compensating lamp forms a second light-compensating area.

In a fourth aspect, a further embodiment of the present invention provides an image monitoring apparatus, including a carrier, on which the image capturing device according to any one of the first aspect is mounted at a first height position from a ground plane.

Compared with the prior art that the monitoring camera device adopts a direct light supplementing mode with the same brightness, and cannot consider the perception characteristics of different shooting objects to light rays to influence the image shooting quality, the image shooting device, the light supplementing module and the image monitoring equipment provided by the embodiment of the application take the perception characteristics of the light rays required by the shooting of the license plate and the faces of the drivers and passengers into consideration, as the adopted light supplementing module is at least used for forming a first light supplementing area and a second light supplementing area with different illumination intensities, the illumination intensity of the second light supplementing area is smaller than that of the first light supplementing area, the first light supplementing area corresponds to the faces of the drivers and passengers, the second light supplementing area corresponds to the license plate and supplements light with proper illumination intensity, and at least partial areas of the first light supplementing area and the second light supplementing area are overlapped with the field range of the imaging module to realize the respective shooting objects, the image shooting quality can be improved in an auxiliary mode at least to a certain extent, and therefore the subsequent recognition effect of the vehicle and the human face is improved conveniently.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of an image capturing apparatus according to an embodiment of the present disclosure;

FIG. 2 is a schematic optical path diagram of an embodiment of an image capturing apparatus according to the present application;

fig. 3 is a schematic view of the light supplement region and the photographing field region formed in fig. 2;

FIG. 4 is a schematic structural diagram of another embodiment of an image capturing device according to the present application;

FIG. 5 is a schematic diagram of a fill-in light region and a capture view field region of the image capture device shown in FIG. 4;

FIG. 6 is a schematic perspective view of a fill-in light region and a capture view field region of the image capture device shown in FIG. 4;

FIG. 7 is a schematic structural diagram of an image capturing apparatus according to another embodiment of the present application;

FIG. 8 is a schematic diagram illustrating a light path of a fill-in light of the image capturing apparatus shown in FIG. 7;

FIG. 9 is a schematic diagram of a fill-in light region and a capture view field region formed by the image capture device of FIG. 7;

FIG. 10 is a schematic perspective view of a fill-in light region and a capture view field region of the image capture device in FIG. 7;

FIG. 11 is a schematic structural diagram of an image capturing apparatus according to still another embodiment of the present disclosure;

FIG. 12 is a schematic partial cross-sectional view of an embodiment of an image capturing apparatus according to the present application;

FIG. 13 is a schematic structural diagram of an image capturing apparatus according to another embodiment of the present application;

fig. 14 is a partial schematic structural diagram of an image capturing apparatus according to an embodiment of the present disclosure.

Detailed Description

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

To assist in understanding the present application, a brief introduction to the related art follows:

at present, most of intelligent cameras only have a face recognition function or a license plate recognition function, and few devices with the two functions are available, and some intelligent cameras with the face recognition function and the license plate recognition function are mainly applied to barrier gates or movable devices such as vehicles.

The inventor finds out in the process of realizing the invention: because the face recognition function and the license plate recognition function need to be carried out synchronously, the license plate has obvious light sensing, the license plate can be illuminated by dim light in the night environment, and the face can be seen only by strong illumination. The existing image shooting device generally adopts a direct light supplementing mode with the same brightness, so that the situation that when a face is clear, the license plate is over-exploded and cannot be recognized and when the license plate is clear, the face is dark and cannot be recognized can occur in the image.

Aiming at the problems in the prior art, the technical scheme of the application starts from the structure of the light supplement lamp adopted by the image shooting device, so that the light supplement lamp forms different light supplement areas to supplement light of different intensities adopted by the face and the license plate respectively, and the image quality of image shooting of the face and the license plate synchronously can be improved.

Referring to fig. 1 to 11, an image capturing apparatus according to an embodiment of the present disclosure is suitable for use in an application scenario of image capturing and image recognition technology; in particular, the device is also suitable for synchronously shooting objects with different photosensitive characteristics in dark environment, such as the shooting of license plates and the faces of drivers and passengers.

The image capturing apparatus includes: the shell 100, be equipped with imaging module 110 and light filling module 130 in the shell 100, the light filling module 130 is located the lateral part of imaging module 110, the light filling module 130 is used for forming the regional 210 of first light filling and the regional 220 of second light filling of different illumination intensity at least, the illumination intensity of the regional 220 of second light filling is less than the illumination intensity of the regional 210 of first light filling, just the regional 210 of first light filling and the regional 220 of second light filling respectively at least respectively have partial region with the field of view scope 111 of imaging module 110 overlaps.

The image capturing device may be a camera (for convenience of description, the camera is hereinafter also referred to as an image capturing device), the imaging module 110 includes an image sensor and a lens, and the field range 111 of the imaging module 110 may also be referred to as a capturing field; generally, on the premise of a certain object distance, the larger the field angle is, the larger the field range 111 is; conversely, the smaller.

In some embodiments, at least a portion of the second fill-in light region 220 is located below the first fill-in light region 210; for example, the method is applied to image shooting subarea light supplement with the up-and-down orientation relation between a license plate and a driver and the like.

In fig. 6 and 10, the first fill-in light region 210 is specifically a circular region in the drawing, the second fill-in light region 220 is a large circular arc region in the drawing, and the field range (or referred to as a shooting field) 111 of the imaging module is a rectangular region in the drawing.

In some application embodiments, the image shooting device is installed on a mobile device, such as an unmanned patrol car, and is used for carrying out safety patrol check on vehicles in the district; according to the actual shooting object, for example, a vehicle, the position of the license plate of the vehicle is at a different height from the position of the face of the driver, and therefore, the critical positions 230 of the first light supplement region 210 and the second light supplement region 220 need to be determined according to the height from the ground plane and the object distance from the specific shooting part of the shooting object. In some embodiments, when the imaging module 110 is 2 to 4 meters away from the object to be photographed, an overlapping portion of the first light compensation region 210 and the field of view range 111 of the imaging module 110 is located above a predetermined position of the object to be photographed, and an overlapping portion of the second light compensation region 220 and the field of view range 111 of the imaging module 110 is located below the predetermined position of the object to be photographed. The preset position is the critical position, and the preset position is a position which is 0.8-1.2 m away from the ground level on the shooting object.

In some embodiments, the license plate of most vehicles is generally below 1m in height, while the position of the face is generally above 1m and below 2m in height (excluding young children); therefore, based on the position characteristics of the two shooting parts, the image sensor can be vertically installed in the direction, namely the vertical image is output; in some embodiments, the imaging module 110 includes an image sensor and a lens disposed in front of the image sensor, and a vertical dimension of an image captured by the image sensor is greater than a horizontal dimension. Therefore, the distribution characteristics of the shot objects can be well adapted, and a first light supplement area 210 is formed in an area, higher than 1m, of the shot objects and used for face recognition; and forming a second supplementary lighting area 220 in an area lower than 1m for license plate recognition. Since the light intensity of the light emitted from the first light-transmitting area is greater than the light intensity of the light emitted from the second light-transmitting area, the first light supplement area 210 and the second light supplement area 220 formed in the different positions are relatively strong light supplements and weak light supplements. Therefore, the human face and the license plate can be synchronously and differentially supplemented with light, and the shooting quality of the image can be improved to a certain extent.

It should be noted that, taking the predetermined position (i.e. the critical position) as an example of a height of 1m from the ground plane, as can be seen from the foregoing description, the value may also be different according to the characteristics of the object to be shot, and therefore, the value is only an illustrative example and cannot be regarded as a limitation of the predetermined position value specifically applicable to the embodiment of the present invention.

The image shooting device provided by the embodiment of the application gives consideration to the perception characteristic that the license plate and the face of a driver or a passenger shoot required light, because the adopted light supplementing module 130 is at least used for forming a first light supplementing area 210 and a second light supplementing area 220 with different illumination intensities, at least part of the second light supplementing area 220 is positioned below the first light supplementing area 210, the illumination intensity of the second light supplementing area 220 is smaller than that of the first light supplementing area 210, wherein the first light supplementing area 210 corresponds to the face of the driver or the passenger, the second light supplementing area 220 corresponds to the license plate and supplements light with proper illumination intensity, and the first light supplementing area 210 and the second light supplementing area 220 respectively have at least partial areas overlapping with the field range 111 of the imaging module 110 so as to realize respective light supplementing of different shooting objects and at least improve the image shooting quality to a certain degree, thereby being convenient for subsequently improving the recognition effect of the vehicle and the human face.

Of course, based on the technical concept of the present invention of partitioned supplementary lighting to improve the image shooting quality, the present invention may also be used in some other non-vehicle shooting and recognition scenes, and the above mentioned application scenes of vehicle license plate and face recognition and the corresponding technical effects are for convenience of description and cannot be regarded as limitations to the technical solution itself, the application scenes and the technical effects of the embodiments of the present invention.

In addition, it should be noted that, in the solution described in the embodiment of the present invention, the light filling module is at least used for forming the first light filling area and the second light filling area, and for convenience of description and brevity, the description is basically provided based on the two light filling areas in this document. It can be understood that, based on the technical concept of performing the partitioned light supplement on the photographic object to improve the image photographing quality, three or four or even more light supplement regions can be formed according to the specific scene requirements to adapt to more image photographing or to identify different light sensing characteristics of different photographic objects in the scene, so that the light supplement is performed respectively in a targeted manner to improve the image photographing quality, thereby facilitating the subsequent improvement of the identification effect of the target object (or the target feature) in the photographic object.

The light supplement module 130 may include one or more light supplement lamps; the number of specific light filling lamps is based on meeting actual requirements, and the actual requirements can include light filling intensity, installation space and the like. For example, in some scenes where long-distance light supplement is required, a plurality of light supplement lamps need to be arranged because the light supplement intensity of a single light supplement lamp is limited; conversely, one may be used. For example, in some scenes with limited installation space, the number of the light supplement lamps is too large, and the installation space is not enough, so that a large number of light supplement lamps cannot be arranged.

Specifically, referring to fig. 1 to 6, a light-transmitting window 131 is disposed on a light exit path of the fill light, the light-transmitting window 131 has a first light-transmitting region 1311 and a second light-transmitting region 1312, the first light-transmitting region 1311 is located above the second light-transmitting region 1312, and a light transmittance of the first light-transmitting region 1311 is greater than a light transmittance of the second light-transmitting region 1312; the light emitted from the first light-transmitting region 1311 forms the first light supplement region 210, and the light emitted from the second light-transmitting region 1312 forms the second light supplement region 220.

In order to adapt to most of service environments, 2 or more light supplement lamps are generally designed and used, and thus, the specific implementation mode of the structural scheme capable of realizing the partitioned light supplement is also combined and realized. For convenience of description, in the embodiment having a plurality of fill-in lamps, two exemplary configurations will be described in detail below, but it is needless to say that two or more may be provided.

In some embodiments of the light supplement module 130 having at least two light supplement lamps, for example, the light transmission windows 131 are respectively disposed in front of the at least two light supplement lamps, and each of the two light transmission windows 131 has a first light transmission region 1311 and a second light transmission region 1312, and light passes through each of the first light transmission region 1311 and the second light transmission region 1312; due to the fact that the number of the light supplement lamps is increased, the light intensity of the formed first light supplement area 210 and the light intensity of the formed second light supplement area 220 are enhanced, and image recognition at a longer distance can be achieved.

In addition, in this embodiment, one or more light supplement lamps can be turned on according to the actual light supplement requirement by setting a control device for controlling the on/off of the light supplement lamps. For example, when a shooting object is close to a camera, only one light supplement lamp can be turned on, and when the shooting object is far away from the camera, two or more light supplement lamps can be turned on to better adapt to the light supplement requirement of image shooting.

Certainly, in some embodiments, the maximum output light amount of the fill light can also be adjusted through hardware design and software control, and those skilled in the art can set the maximum output light amount according to the technical concept of the present invention and the prior art according to the needs, so as to highlight the gist of the present invention, and further description is omitted here.

Referring to fig. 4, in an embodiment that the light supplement module 130 includes at least two light supplement lamps, a light transmittance of the second light-transmitting area 1312 of the light-transmitting window 131 disposed in front of one light supplement lamp 132 is 0 (obviously, it also conforms that the light transmittance of the first light-transmitting area is greater than that of the second light-transmitting area), i.e., a shielding process; another light supplement lamp 133, which is matched with the light supplement lamp to form a first light supplement region 210 and a second light supplement region 220, is disposed as a light transmission window 131 of one light transmission region, or is disposed as the light transmission window 131 having two light transmission regions in the invention, but the light transmittance of the second light transmission region 1312 of the light transmission window 131 of the light supplement lamp needs to be greater than 0.

In some embodiments, the fill light module further includes at least one infrared fill light, wherein a light-transmitting window 134 of the infrared fill light is smaller than the light-transmitting windows 131 of the fill lights 132 and 133.

The second light-transmitting area 1312 of the light-transmitting window 131 is half-shielded. Thus, the intensity of light transmitted through the second transparent region 1312 can be reduced, so that two light supplement regions with different light intensities can be formed.

The second light-transmitting region 1312 including the light-transmitting window 131 is made of a translucent material, which may be an optical material such as translucent resin or glass manufactured by a certain process, for example, frosting.

Alternatively, the half-shading treatment may include providing a translucent coating on the second light-transmitting region 1312, for example, spraying paint or ink on the surface of the optical device such as glass or resin by a spraying process, or printing ink on the surface of the optical device such as glass or resin by a printing process.

Alternatively, a translucent adhesive film may be provided in the second light-transmitting region 1312, and the translucent adhesive film may be attached to a surface of an optical device such as glass or resin by, for example, an adhesive process.

Referring to fig. 4 to 6, in some embodiments, for example, in the scheme of at least two light supplement lamps shown in fig. 4, the second light transmitting area 1312 of one light supplement lamp located in the lower half portion is processed by light shielding (also referred to as light blocking), and only the first light transmitting area 1311 located in the upper half portion is allowed to emit light, which is overlapped with part of light of the other light supplement lamp to form a first light supplement area 210 with strong illumination for face recognition, and the rest of light of the other light supplement lamp to form a second light supplement area 220 with weak illumination for license plate recognition.

In some application environments of the present invention, the ratio of the first light-transmitting area 1311 to the second light-transmitting area 1312 of the light-transmitting window 131 is also related to the object distance and the positions of different parts of the subject: in a dark environment, an object distance of 3m and a height of more than 1m are defined to belong to a face recognition area, a license plate recognition area is defined below 1m, and by combining with the actual installation angle of a camera, about 50% of the light-transmitting window 131 is shielded, and 50% of the light-transmitting window is open, namely, the first light-transmitting area 1311 and the second light-transmitting area 1312 respectively account for about 50%.

In the scheme of shielding the second light-transmitting area 1312, the second light-transmitting area 1312 can be designed into an adjustable light-blocking part, and the proportion of the first light-supplementing area 210 for face recognition and the proportion of the second light-supplementing area 220 for license plate recognition can be changed by adjusting the position of the light-blocking part, so that the adaptability of the device is better in the actual use process; for example, in the case that the object to be photographed is a truck or a car, the height positions of the license plate and the cab of the car are different from those of the truck, and in order to enable the image photographing device to be suitable for image recognition of two vehicles with different specifications, the requirements of corresponding vehicle image recognition on the photographed image can be met by adjusting the vertical ratio of the light blocking component.

It can be understood that, in the foregoing specific implementation manner for implementing the light supplement in the first light supplement region 210 and the second light supplement region 220 respectively, since the second light transmitting region 1312 is half shielded or shielded, a part of light emitted by the light supplement lamp cannot be effectively utilized, and thus light energy loss occurs.

Therefore, referring to fig. 7 to 11, in another alternative embodiment, the fill-in light module 130 includes at least two fill-in lights 140 (please note that the number of the fill-in lights in this embodiment is different from the number of the fill-in lights in the previous embodiment, and is used for distinction), in some embodiments, at least one fill-in light is respectively disposed at two sides of the image sensor; the light-compensating lamps are provided with light-transmitting windows 131 on light-emitting paths, the light-transmitting window 131 on the light-emitting path of one of the light-compensating lamps is a polarization structural element for deflecting and emitting light irradiated onto the light-transmitting window 131 to a predetermined direction, the light emitted from the polarization structural element and a part of light of the other light-compensating lamp are overlapped to form the first light-compensating region 210, and the other part of light of the other light-compensating lamp forms the second light-compensating region 220.

In some application scenes in which the illumination intensity of the first supplementary lighting area is required to be greater than that of the second supplementary lighting area, the predetermined direction is obliquely upward and forward.

In this embodiment, by disposing the polarization structural element on the light exit path of at least one light supplement lamp, when the light exits to the incident surface of the polarization structural element, the light is deflected and refracted on the exit surface, and is overlapped with a part of light of another light supplement lamp to form the first light supplement region 210, and another part of light of the another light supplement lamp forms the second light supplement region 220. Thus, the loss of light energy can be greatly reduced compared to the half-shading or shading scheme. Furthermore, on the premise of achieving the same light supplement effect, the light supplement lamp with smaller power can be adopted in the scheme to achieve the expected light supplement effect, and therefore energy consumption can be reduced.

Furthermore, because the power consumption is reduced, the heat productivity is synchronously reduced, thereby reducing the heat radiation burden of the whole image shooting device, reducing the overall dimension of the product or reducing the design and manufacturing cost to a certain extent, and improving the reliability and the service life of the whole image shooting device.

In some embodiments of the invention (not shown), the polarization structure element is a polarizer, an incident surface of the polarizer is perpendicular to an optical axis of the fill-in lamp, an exit surface of the polarizer has an inclined surface, and an inclination direction of the inclined surface is consistent with a deflection direction of the exiting light.

In some embodiments, the slope of the slope with respect to the optical axis of the fill light is positive. The slope is a term in the mathematical discipline, and can be used for representing the inclination direction and the slope of a straight line relative to a horizontal plane, and the slope generally has three conditions, namely positive (indicating that the slope gradually rises along the positive direction of the abscissa axis), negative (indicating that the slope gradually falls along the positive direction of the abscissa axis) and 0 (indicating that the slope does not change along the positive direction of the abscissa axis).

In this embodiment, the incident surface of the polarizer is perpendicular to the optical axis of the light supplement lamp, the exit surface of the polarizer has an inclined surface, and the inclined direction of the inclined surface is consistent with the deflection direction of the outgoing light, so that the light irradiated by the light supplement lamp on the polarization structural element exits to the front direction in a predetermined inclined direction, and is overlapped with a part of light of another light supplement lamp to form the first light supplement region 210.

If the polarizer is designed to be a wedge-shaped structural member with an inclined plane, in order to meet the requirement of the deflection angle of the light emitted from the emergent surface, the whole polarizer needs to be thicker, and the slope of the inclined plane can be larger, so that the requirement of the deflection of the light is met.

Referring to fig. 7 and 8, in another alternative embodiment, the polarization structure element is a polarizer P, a sawtooth structure 1313 is disposed on an exit surface of the polarizer P, the sawtooth structure 1313 includes a plurality of connected slots 1314, the slots 1314 include a first sidewall 1315 and a second sidewall 1316 connected to one end of the first sidewall 1315, and the slope of the first sidewall 1315 with respect to the optical axis of the fill lamp is positive.

Compared with the prior art that the polarizer is designed into a complete wedge-shaped structural member, the embodiment designs the surface of the emergent surface of the polarizer into a sawtooth-shaped structure formed by connecting a plurality of tooth sockets, so that the thickness of the polarizer can be reduced while the requirement of deflecting emergent rays at a preset deflection angle is met, and the overall structure of the image shooting device is reduced.

In some embodiments, in which the emergent light beam can be deflected to form the first light supplement region 210 with a part of the light beam of another light supplement lamp, the polarizing structure element is a polarizer, the polarizer is obliquely disposed on the light emergent path of the light supplement lamp, and the oblique direction of the polarizer is the same as the deflecting direction of the emergent light beam. Through the polarisation constitutional element with a light filling lamp the place ahead, the polaroid promptly, the slope is installed on the light outgoing path of this light filling lamp, and for installing for the slope of light filling lamp optical axis, can realize the deflection emergent ray, forms first light filling region 210 with the partial light of another light filling lamp to and then realize carrying out the light filling purpose of different illumination intensity to the different positions of shooting object.

In order to enhance the illumination intensity of the first fill-in light region 210, when at least two fill-in light lamps are used, a convex lens lamp cup 135 is further disposed between the fill-in light of the polarization structure element and the polarization structure element, which is the light-transmitting window 131 disposed in one of the light-transmitting windows, as shown in fig. 7. A convex lens lamp cup 135 is arranged in front of the light supplementing lamp, so that after small-angle condensed light beams are formed, emergent light rays are deflected by a preset angle through a polarization structural element and irradiate towards the upper front part obliquely, and a large-angle divergent light beam emitted by the other light supplementing lamp covers the whole picture; the deflected small-angle light beams and the upper half part of the large-angle light beams are overlapped to form a first light supplement area 210 for strong light supplement, and the first light supplement area is used for face recognition light supplement; the lower half part of the large-angle light beam forms a second light supplement area 220 for weak light supplement, and the second light supplement area is used for license plate recognition light supplement; as shown in fig. 10 and 11.

In some embodiments, in order to prevent the built-in fill light from interfering with the lens, the lens and the fill light at the front end of the imaging module 110 are mostly physically separated, so that the light of the fill light cannot directly reach the surface of the lens to avoid the influence of glare on image quality.

However, the above-mentioned physical isolation scheme generally designs the light compensating lamp and the transparent window (commonly called as a protective lens) of the lens separately, i.e. a split structure. The resulting adverse effects are: the structure is complicated, the parts are many, and the manufacturing cost is high.

Therefore, referring to fig. 11 and 12, in another embodiment of the present invention, the supplementary lighting module 130 includes at least one supplementary lighting lamp, and in the embodiment shown in fig. 12, includes two supplementary lighting lamps 132, the imaging module 110 includes a lens, at least a first compartment 101 and a second compartment 102 are disposed in the housing 100, the supplementary lighting lamps 132 are disposed in the first compartment 101, and the imaging module 110 is disposed in the second compartment 102.

The shell 100 front end has integral type lens 103, the integral type lens corresponds the light filling lamp has printing opacity window district 104, corresponds the camera lens has camera lens printing opacity district 105, the shell 100 front end corresponds at least the integral type lens, is located printing opacity window 131 district with the region between the camera lens printing opacity district has shading portion 106 for prevent from the light that the light filling lamp sent back in getting into the integral type lens, can not reflect the arrival camera lens surface at the reflection light that the integral type lens exit surface formed, thereby can prevent to appear scurrying the phenomenon of light.

Wherein, in order to ensure the light transmission effect, the material of the integrated lens can select glass or transparent resin; the specific selection may be determined according to the actual usage scenario: if better wear resistance is needed, certain impact resistance is also needed, and toughened glass can be considered; the composite plate of PMMA + PC (wherein PMMA is commonly called acrylic; PC is named polycarbonate in Chinese) can be used for hardening treatment, and impact resistance and wear resistance are both considered; the impact resistance is improved.

The integrated lens adopts a scheme of partial light transmission: in some embodiments, where light does not need to be transmitted, the back surface of the light-shielding window is subjected to light-shielding treatment, only a local region needing light transmission is reserved, and for a light-transmitting window region for light supplement, the light supplement scheme according to the foregoing embodiments is subjected to full-transmission or semi-transmission or local transmission treatment. Therefore, the entire surface of the unitary lens is divided into three portions, namely a lens transparent area 104, a fill light transparent area 105 and an opaque area 107, wherein a part of the opaque area 106 forms the light shielding portion 106.

In this embodiment, through adopting integral type lens structure, be about to light filling lamp printing opacity, camera lens printing opacity and prevent scurrying functions such as light and realize on same big lens, the technology structure is simplified, reduce cost, and can avoid influencing the problem of image shooting quality because of scurrying light to a certain extent.

As mentioned above, it can be understood that when the light emitted from the fill-in light passes through the lens, most of the light passes through the lens to illuminate the object scene ahead, and a small part of the light is reflected inside the lens and may directly reach the surface of the lens, so that glare may occur to affect the image quality; the conventional solution is simple physical isolation, using split lenses.

In this embodiment, on the basis of adopting the integral type lens, the problem of scurrying light has been solved through structural improvement. In order to ensure that a small portion of light entering the integrated lens is effectively prevented from being reflected inside the lens and possibly directly reaching the lens surface, as shown in fig. 12, in some embodiments, the length of the light shielding portion is greater than or equal to the maximum horizontal distance x between the incident point of the light entering the light supplementing lamp in the integrated lens from the edge of the transparent window area 104 near the transparent area side of the lens and the light spot reflected to the incident point of the integrated lens from the exit surface of the integrated lens.

As shown in fig. 13, in the drawing, α is the maximum beam angle of the fill-in light after being blocked by the structural member; beta is the angle of the maximum beam angle after being refracted by the lens; d is the width of the light-transmitting hole of the light supplement lamp; h is the distance from the light supplement lamp to the surface of the lens; x is the maximum horizontal distance x between the incident point of the light ray entering the light supplementing lamp in the integrated lens on the incident surface of the integrated lens and the light spot reflected to the incident surface of the integrated lens on the emergent surface of the integrated lens; l is the width of the shading part; t is the lens thickness; gamma is the refractive index of the lens.

According to the optical geometry in the structure shown in fig. 12, there are:

therefore, the minimum requirement for determining the light shielding portion width L should be satisfied

The following anti-channeling scheme can be obtained according to the design requirement formula of the light shielding part width obtained as follows:

in some anti-channeling light schemes, the position of the light supplement lamp can be reasonably arranged according to the requirement of the lens view angle: the light filling lamp is far away from the lens or the size of the light hole is reduced as far as possible under the condition that the light filling angle requirement can be met, namely the h value in the formula is increased, and the d value is reduced, so that reflected light cannot reach the surface of the lens, and is absorbed and shielded by the light shielding part near the lens.

In other light channeling prevention schemes, under the condition that the appearance shape allows, the width from the edge of the lens light-transmitting area to the edge of the light-transmitting window 131 of the fill-in lamp, namely the width L value of the light-shielding part in the formula, is enlarged as much as possible, so that the reflected light cannot directly reach the surface of the lens;

in still other anti-light-channeling schemes, when the overall size of the camera is small and the angle required for the fill-in view is large, the need to dispose the fill-in light away from the lens or increase the horizontal distance between the fill-in light and the lens may still not be met, and therefore, the light-transmitting area of the lens and/or the light-transmitting window 131 area are rectangular.

In general, the lens transparent area and the transparent window 131 area are both circular structures, and since the image is rectangular, the actually useful lens transparent area and the transparent window 131 area should be inscribed rectangular transparent areas with circular structures, and other unnecessary places can be shaded. Therefore, the lens light-transmitting area and the light-transmitting window 131 area are changed into rectangular structures, the width d value of the light-transmitting hole is reduced, and the width L value of the shading part between the edge of the lens light-transmitting area and the edge of the light-compensating lamp light-transmitting window 131 area is correspondingly increased. As shown in fig. 13, the light transmitting area of the lens and the light transmitting window 131 are opened after the useless area of the light transmitting hole is reduced.

In some embodiments, the three light-fleeing prevention schemes can also be combined for use, so that the requirement of most cameras on the shooting visual field can be basically met, and the technical problem of light-fleeing prevention can be better solved.

According to the image shooting device provided by the embodiment of the invention, the integrated lens is adopted, so that the cost is effectively reduced; and the technical problem of light channeling can be solved by providing feasibility conditions for the application of the integrated lens and the mathematical simplified model for determining the width of the light shielding part.

For some aforementioned split lens design schemes, because the lens light-transmitting area and the light-transmitting window 131 area are separately designed, for products with waterproof requirements, the required dispensing area is large, the dispensing sealing surface is narrow, the waterproof failure probability is increased, and the reliability is reduced. In the embodiment, by adopting the integrated lens structure, the area of the dispensing area is greatly increased, and the dispensing area can be effectively reduced, so that the dispensing efficiency is improved, and the waterproof effect can be improved to a certain extent.

Referring to fig. 14, in some embodiments, an overflow groove 108 is formed on the end surface of the housing 100 for mounting the one-piece lens to prevent glue from overflowing from the periphery after the lens is bonded, thereby preventing the appearance from being affected.

In order to effectively ensure the dispensing thickness, in other embodiments, a limiting protrusion 109 for limiting the dispensing thickness is further disposed on the end surface of the housing 100 for mounting the integrated lens. The limiting protruding part is a positioning structure of the lens in the installation direction, the distance between the limiting protruding part and the dispensing surface 110 is 0.1-0.5mm, the integrated lens firstly contacts with glue in the assembling and pressing process, the glue overflows to two sides, then the integrated lens contacts with the limiting rib, the tendency that the glue overflows to a light transmission area is prevented to a certain extent, the limiting effect of the limiting protruding part ensures the thickness of a glue film, the glue is prevented from being extruded without limitation, and the waterproof performance is ensured.

According to the image shooting device provided by the embodiment of the invention, the inner glue overflow groove, the outer glue overflow groove and the limiting bulge structure are arranged on the end surface of the shell 100, so that glue can be effectively prevented from overflowing or overflowing to the light hole, and the appearance of a product is ensured; and the area of the dispensing area is enlarged, the difficulty of actual production is reduced, and the dispensing operability is greatly improved.

Example two

Based on the description of the light supplement scheme involved in the image capturing apparatus in the first embodiment, a further embodiment of the present invention provides a light supplement module 130, including: the light filling lamp is provided with a light-transmitting window 131 on a light emitting path of the light filling lamp, the light-transmitting window 131 is used for enabling light to form a first light filling area 210 and a second light filling area 220 with different illumination intensities, at least part of the second light filling area 220 is located below the first light filling area 210, and the illumination intensity of the second light filling area 220 is smaller than that of the first light filling area 210.

The second light-transmitting area 1312 of the light-transmitting window 131 is half-shielded or shielded. The semi-shading treatment includes that the second light transmission area 1312 of the light transmission window 131 is made of a semitransparent material, or a semitransparent coating or a film is arranged on the second light transmission area 1312.

Alternatively, the light shielding treatment includes: the second light-transmitting area 1312 of the light-transmitting window 131 is made of an opaque material, or an opaque coating or film is disposed on the second light-transmitting area 1312.

The technical solution and technical effects of the embodiments of the present invention can be referred to the related description of the first embodiment, and are not repeated herein.

EXAMPLE III

Based on the description of the light supplement scheme involved in the image capturing apparatus in the first embodiment, a further embodiment of the present invention provides a light supplement module 130, including: the light-compensating lamp comprises at least two light-compensating lamps, wherein a light-transmitting window 131 is arranged on a light emergent path of each light-compensating lamp, the light-transmitting window 131 on the light emergent path of one light-compensating lamp is a polarization structural element which is used for deflecting and emergent light irradiated onto the light-transmitting window 131 to a preset direction, the light emergent from the polarization structural element and part of light of the other light-compensating lamp are overlapped to form a first light-compensating area 210, and the other part of light of the other light-compensating lamp forms a second light-compensating area 220.

In some application scenes in which the illumination intensity of the first supplementary lighting area is required to be greater than that of the second supplementary lighting area, the predetermined direction is obliquely upward and forward.

In some embodiments, the polarization structure element is a polarizer, an incident surface of the polarizer is perpendicular to an optical axis of the light supplement lamp, an exit surface of the polarizer has an inclined surface, and an inclination direction of the inclined surface is consistent with a deflection direction of the emergent light. In other embodiments, the polarization structure element is a polarizer, a sawtooth structure is arranged on an exit surface of the polarizer, the sawtooth structure includes a plurality of connected tooth sockets, each tooth socket includes a first side wall and a second side wall connected to one end of the first side wall, and an inclination direction of the first side wall is consistent with a deflection direction of the exiting light.

In still other embodiments, the polarization structure element is a polarizer, the polarizer is obliquely disposed on the light emitting path of the fill light, and the oblique direction of the polarizer is the same as the deflection direction of the emitted light.

In the embodiment of the light supplement module 130, a convex lens lamp cup is further disposed in front of the light supplement lamp and between the light supplement lamp and the transparent window 131.

The technical solution and technical effects of the embodiments of the present invention can be referred to the description related to the first embodiment, and are not repeated herein.

Example four

On the basis of the first embodiment, the invention further provides an image monitoring system, which includes a carrier, on which the image capturing apparatus according to any one of claims 1 to 18 is mounted at a first height position from the ground level.

Specifically, when the object distance from the optical center of a lens of the imaging module to a shooting object is 2-4 m, the overlapping part of the first light supplement area and the field range of the imaging module, which is formed by the light supplement module, is located above the second height position of the shooting object, the overlapping part of the second light supplement area and the field range of the imaging module, which is formed by the light supplement module, is located below the second height position of the shooting object, and the first height position and the second height position are respectively 0.8-1.2 m away from the ground plane.

The first height position and the second height position are predetermined positions in the first embodiment, and the installation position of the image capturing device (i.e., the first height position) and the critical position 230 of the first light supplement region 210 and the second light supplement region 220 (i.e., the second height position) are generally substantially the same within an allowable installation error range, and when the first height position and the second height position are slightly different, the position requirement of the light supplement region can be met by adjusting the pitch angle of the image capturing device.

In addition, the object distance can be customized according to the requirements of customers, when the object distance changes (the corresponding light supplement distance also changes), the shooting fields of the first light supplement area, the second light supplement area and the imaging module also change, but the critical positions of the first light supplement area and the second light supplement area irradiated on the shooting object need not to be changed basically.

In some embodiments, the carrier may be a device fixed in a location, such as a barrier; the carrier may also be a moving object, such as a vehicle. The object to be photographed is generally a vehicle. The first height position and the second height position are generally determined according to the heights of license plates and cabs of most vehicles, so that the first light supplement area and the second light supplement area formed by the image shooting device respectively supplement light for the license plate positions of the vehicles and the positions of drivers and passengers in a segmented manner, and the imaging module is further ensured to shoot high-quality images.

The image monitoring equipment provided by the embodiment of the invention comprises a carrier, wherein the image shooting device in any one of the embodiments is arranged at the position with the preset height on the carrier, the sensing characteristic of light required by shooting of a license plate and the face of a driver is considered, because the adopted light supplementing module is at least used for forming a first light supplementing area and a second light supplementing area with different illumination intensities, the illumination intensity of the second light supplementing area is less than that of the first light supplementing area, the first light supplementing area corresponds to the face of the driver and the license plate corresponding to the second light supplementing area and provides light supplementing with proper illumination intensity, at least partial areas of the first light supplementing area and the second light supplementing area are overlapped with the field range of the imaging module, so that light supplementing is respectively carried out on different shooting objects, and the image shooting quality can be improved in an auxiliary way at least to a certain degree, thereby facilitating subsequent improvement of recognition effects of vehicles and human faces

It should be noted that the terms "upper", "lower", and the like, herein indicate orientations or positional relationships and are used for convenience in describing the present application and for simplicity in description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. Relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element. As will be appreciated by one of ordinary skill in the art, the situation may be specified.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (28)

1. The utility model provides an image shooting device, its characterized in that, includes the shell, be equipped with formation of image module and light filling module in the shell, the light filling module is located the lateral part of formation of image module, the light filling module is used for forming different illumination intensity's first light filling region and second light filling region at least, the illumination intensity in second light filling region is less than the illumination intensity in first light filling region, just first light filling region respectively at least with the second light filling region respectively have the subregion with the field of view scope of formation of image module overlaps.

2. The image capturing device as claimed in claim 1, wherein the light compensation module includes one or more light compensation lamps, a light transmissive window is disposed on a light exit path of the light compensation lamps, the light transmissive window has a first light transmissive region and a second light transmissive region, the first light transmissive region is located above the second light transmissive region, and a light transmittance of the first light transmissive region is greater than a light transmittance of the second light transmissive region; the light emitted from the first light-transmitting area forms the first light supplement area, and the light emitted from the second light-transmitting area forms the second light supplement area.

3. The image capturing device as claimed in claim 1, wherein the light compensation module includes at least two light compensation lamps, a light transmissive window is disposed on a light path of the light compensation lamps, the light transmissive window on the light path of at least one light compensation lamp has a first light transmissive region and a second light transmissive region, the first light transmissive region is located above the second light transmissive region, and a light transmittance of the first light transmissive region is greater than a light transmittance of the second light transmissive region; the light emitted from the first light-transmitting area forms the first light supplement area, and the light emitted from the second light-transmitting area forms the second light supplement area.

4. The image capturing device as claimed in claim 2 or 3, wherein the second transparent region of the transparent window is processed by half-shading.

5. The image capturing device as claimed in claim 4, wherein the semi-opaque treatment includes applying a translucent material to the second translucent region of the translucent window, or applying a translucent coating or film to the second translucent region.

6. The image capturing device as claimed in claim 1, wherein the light filling module includes at least two light filling lamps, a transparent window is disposed on a light exit path of each light filling lamp, the transparent window on the light exit path of one light filling lamp is a polarization structure element for deflecting light irradiated onto the transparent window in a predetermined direction, the light emitted from the polarization structure element and a part of light of another light filling lamp are overlapped to form the first light filling region, and another part of light of the another light filling lamp forms the second light filling region.

7. The image capturing device as claimed in claim 6, wherein the polarization structure element is a polarizer, an incident surface of the polarizer is perpendicular to an optical axis of the light supplement lamp, an exit surface of the polarizer has an inclined surface, and an inclination direction of the inclined surface is the same as a deflection direction of the exiting light.

8. The image capturing device as claimed in claim 6, wherein the polarization structure element is a polarizer, and a sawtooth structure is provided on the exit surface of the polarizer, the sawtooth structure includes a plurality of connected tooth spaces, the tooth spaces include a first side wall and a second side wall connected to one end of the first side wall, and the first side wall has an inclination direction that is the same as the deflection direction of the exiting light.

9. The image capturing device as claimed in claim 6, wherein the polarization structure element is a polarizer, the polarizer is obliquely disposed on the light exit path of the fill-in light, and the oblique direction of the polarizer is the same as the deflection direction of the exiting light.

10. The image capturing device as claimed in any one of claims 6 to 9, wherein a convex lens cup is further provided between a fill-in light of the polarization structure element in the light-transmissive window and the polarization structure element.

11. The image capturing device as claimed in claim 1, wherein the light compensating module includes at least one light compensating lamp, the imaging module includes a lens, the housing includes at least a first compartment and a second compartment, the light compensating lamp is disposed in the first compartment, and the imaging module is disposed in the second compartment;

the shell front end has the integral type lens, the integral type lens corresponds the light filling lamp has printing opacity window district, corresponds the camera lens has camera lens printing opacity district, the shell front end corresponds at least the integral type lens, be located printing opacity window district with the regional shading portion that has between the camera lens printing opacity district.

12. The image capturing device as claimed in claim 11, wherein the length of the light shielding portion is greater than or equal to a maximum horizontal distance between an incident point of light entering the fill lamp in the integrated lens from an edge of the transparent window area near the transparent side of the lens and a light spot reflected to the incident point of the integrated lens from the exit surface of the integrated lens.

13. The image capture device of claim 11, wherein the lens transparent region and/or transparent window region is rectangular.

14. The image capturing device as claimed in claim 1, wherein the imaging module includes an image sensor and a lens disposed in front of the image sensor, and a vertical dimension of an image captured by the image sensor is larger than a horizontal dimension.

15. The image capturing apparatus of claim 11, wherein the housing has an adhesive overflow groove on an end surface thereof for mounting the integrated lens.

16. The image capturing apparatus as claimed in claim 15, wherein a limiting protrusion for limiting the dispensing thickness is further provided on the end surface of the housing for mounting the integrated lens.

17. The image capturing device as claimed in claim 1, wherein when the imaging module is 2-4 meters away from the subject, the overlapping portion of the first fill-in light region and the field of view of the imaging module is located above a predetermined position of the subject, and the overlapping portion of the second fill-in light region and the field of view of the imaging module is located below the predetermined position of the subject.

18. The image capturing apparatus according to claim 17, wherein the predetermined position is a position on the subject at a height of 0.8 to 1.2m from a ground level.

19. The utility model provides a light filling module which characterized in that includes: the light filling lamp is equipped with the printing opacity window on the light outgoing path of light filling lamp, the printing opacity window be used for with light forms the regional and the second light filling region of different illumination intensity, the illumination intensity in second light filling region is less than the illumination intensity in first light filling region.

20. The light supplement module of claim 19, wherein the second transparent region of the transparent window is processed by half-shading or shading.

21. The light supplement module of claim 19, wherein the semi-opaque treatment comprises applying a translucent material to a second translucent region of the translucent window, or applying a translucent coating or a film to the second translucent region;

alternatively, the light shielding treatment includes: the second light transmission area of the light transmission window is made of opaque materials, or an opaque coating or a film is arranged in the second light transmission area.

22. The utility model provides a light filling module which characterized in that includes: the light-compensating lamp comprises at least two light-compensating lamps, wherein a light-transmitting window is arranged on a light emergent path of one light-compensating lamp, the light-transmitting window on the light emergent path of one light-compensating lamp is a polarization structure element which is used for deflecting and emergent light rays irradiated to the light-transmitting window in a preset direction, the light rays emergent from the polarization structure element and part of light rays of the other light-compensating lamp are overlapped to form a first light-compensating area, and the other part of light rays of the other light-compensating lamp form a second light-compensating area.

23. The light supplement module of claim 22, wherein the polarization structure element is a polarizer, an incident surface of the polarizer is perpendicular to an optical axis of the light supplement lamp, an exit surface of the polarizer has an inclined surface, and an inclination direction of the inclined surface is the same as a deflection direction of the emergent light.

24. The light supplement module of claim 22, wherein the light-polarizing structure element is a polarizer, and a sawtooth structure is disposed on the exit surface of the polarizer, the sawtooth structure includes a plurality of connected tooth spaces, each tooth space includes a first sidewall and a second sidewall connected to one end of the first sidewall, and an inclination direction of the first sidewall is the same as a deflection direction of the exiting light.

25. The light supplement module of claim 22, wherein the polarization structure element is a polarizer, the polarizer is obliquely disposed on the light exit path of the light supplement lamp, and the oblique direction of the polarizer is the same as the deflection direction of the exiting light.

26. A light supplement module according to any one of claims 22 to 25, wherein a convex lens lamp cup is further disposed in front of the light supplement lamp and between the light supplement lamp and the transparent window.

27. An image monitoring apparatus comprising a carrier on which the image capturing device according to any one of claims 1 to 18 is mounted at a first height position from a ground level.

28. The light supplement module of claim 27, wherein when an object distance from an optical center of a lens of the imaging module to a subject is 2-4 m, an overlapping portion of the first light supplement region formed by the light supplement module and a field of view of the imaging module is located above a second height position of the subject, an overlapping portion of the second light supplement region formed by the light supplement module and the field of view of the imaging module is located below the second height position of the subject, and the first height position and the second height position are respectively 0.8-1.2 m from a ground plane.

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