WO2020107161A1

WO2020107161A1 - Fill light device

Info

Publication number: WO2020107161A1
Application number: PCT/CN2018/117465
Authority: WO
Inventors: 张国明
Original assignee: 深圳辰锐软件开发有限公司
Priority date: 2018-11-26
Filing date: 2018-11-26
Publication date: 2020-06-04
Also published as: CN209962066U

Abstract

A fill light device (20), comprising a fill light group (25). The fill light group (25) comprises a first light group (21), a second light group (22), and a third light group (23). The light-emitting center lines of the first light group (21), the second light group (22), and the third light group (23) are all laterally misaligned by different angles with respect to a vertical plane (32) of a camera monitoring center line and are inclined downward at different angles with respect to the horizontal plane (33), so that different positions of an area in need of light fill can be illuminated, thereby achieving sector light supplement for said area, and improving the overall light supplement effect of said area.

Description

Light supplement device

Technical field

The present application relates to the technical field of monitoring, and more particularly, to a light supplement device for supplementing light for a camera for vehicle monitoring.

Background technique

With the development of society, the requirements for safety and monitoring in various fields are becoming higher and higher, especially in the field of transportation, including road monitoring and vehicle monitoring. Vehicle monitoring is mainly aimed at the front and rear of the car. There is a large blind area for the front area of the car and the right side of the car during driving, which is not conducive to the safe monitoring of the car during driving.

With the maturity of artificial intelligence technology, the side blind area of vehicle monitoring has begun to apply artificial intelligence to identify collision prevention accidents. This technology is to detect the area on the right side of the car body and analyze and compare the features in the video to draw a recognition conclusion. Video detection includes detecting whether there are pedestrians, bicycles, electric cars, motorcycles, tricycles, etc. on the side of the car.

The following problems exist in the night vision environment:

(1) The camera in the blind area on the outside of the car can not shoot a video with sufficient brightness because the environment is too dark at night without supplementary light;

(2) When the headlights are turned on, the brightness contrast between the front fill light area and the vehicle sidelight non-fill light area will be too large, making the brightness of the captured image area uneven;

(3) When the vehicle passes the street light, the light is bright and dark, which makes the environment fill light extremely unstable and the light interference is serious, causing the unstable phenomenon of bright and dark when the video is shot.

In the application of intelligent analysis of in-vehicle monitoring, when filling the night vision environment to some areas of special interest in the video (that is, the area of interest), due to the difference in distance between the camera and the camera, the use of conventional fill light methods will cause overexposure in the vicinity. The problem of insufficient brightness.

The video abnormality caused by the above will cause the artificial intelligence detection accuracy of the blind area on the vehicle side to be reduced or invalid. The decreased detection accuracy includes abnormal missed detection and normal false detection.

technical problem

The purpose of the embodiments of the present application is to provide a fill light device to solve the technical problem that the accuracy of artificial intelligence detection is reduced due to uneven fill light effect in the blind area on the vehicle side in the prior art.

Technical solution

In order to solve the above technical problems, the technical solution adopted in the embodiments of the present application is to provide a fill light device, which is set to fill the camera light, and define the vertical plane where the monitoring center line of the camera is located as a reference center plane. The light device includes a fill light group including:

The first lamp group has a first luminous angle, and the luminous center line of the first lamp group is biased to one side relative to the reference center plane, and the luminous center line of the first lamp group is biased downward relative to the horizontal plane, having First downtilt

The second lamp group has a second light emitting angle, and the light emitting center line of the second lamp group is biased to one side relative to the reference center plane, and the light emitting center line of the second lamp group is biased downward relative to the horizontal plane , With a second downtilt; and

The third lamp group has a third light emitting angle, and the light emitting center line of the third lamp group is biased to the other side relative to the reference center plane, and the light emitting center line of the third lamp group is biased relative to the horizontal plane Below, with a third downward angle;

The angles of deviation of the first lamp group and the second lamp group with respect to the reference center plane are not equal;

The first down tilt angle, the second down tilt angle, and the third down tilt angle are not equal to each other.

In an embodiment, the angle of the first lamp group deviating from the reference center plane is smaller than the angle of the second lamp group deviating from the reference center plane; the first downtilt angle is greater than the first Two downtilt angles, the second downtilt angle is greater than the third downtilt angle.

In one embodiment, the first light-emitting angle is greater than the second light-emitting angle, and the second light-emitting angle is greater than the third light-emitting angle.

In an embodiment, the first light emitting angle is 40-50 degrees, the second light emitting angle is 25-35 degrees, and the third light emitting angle is 10-20 degrees.

In one embodiment, the first light emitting angle is 45 degrees, the second light emitting angle is 30 degrees, and the third light emitting angle is 15 degrees.

In one embodiment, the first downward angle is 14-16 degrees, the second downward angle is 7-9 degrees, and the third downward angle is 4-6 degrees.

In an embodiment, the first downtilt angle is 15 degrees, the second downtilt angle is 8 degrees, and the third downtilt angle is 5 degrees.

In an embodiment, the fill light device is provided on the rear upper side of the side of the vehicle body, and is configured to fill in a region of interest on the side of the vehicle body. The region of interest includes a first area, a second area, and a third area. The first zone is located near the fill light device, the second zone is located away from the fill light device and away from the side of the vehicle body, and the second zone is located away from the fill light device and close to the Describe the body side.

In an embodiment, the deviation angle of the first light group with respect to the side of the vehicle body is 8-10 degrees, the deviation angle of the second light group with respect to the side of the vehicle body is 10-12 degrees, and the third The deviation angle of the light group relative to the side of the vehicle body is 1 to 3 degrees.

In an embodiment, the deviation angle of the first light group with respect to the side of the vehicle body is 9 degrees, the deviation angle of the second light group with respect to the side of the vehicle body is 11 degrees, and the third light group The deviation angle with respect to the side of the vehicle body is 2 degrees.

In an embodiment, the first lamp group is disposed below the second lamp group and the third lamp group, and the third lamp group is disposed near the side of the vehicle body relative to the second lamp group.

In an embodiment, the first lamp group, the second lamp group, and the third lamp group each include two light emitting components.

In an embodiment, the first lamp group, the second lamp group, and the third lamp group all emit infrared light with a peak wavelength of 850 nm.

In an embodiment, the fill light device further includes a fill light control component, the fill light control component includes an ambient illuminance detection element and a control element, the ambient illuminance detection element is set to detect an illuminance value of ambient light, the The control element is configured to turn on or turn off the fill light group according to the detected illuminance value of the ambient light and the size of the preset threshold.

In one embodiment, the ambient illuminance detection element is a photodiode, and the preset threshold includes an on threshold and an off threshold; the on threshold is 15-25 LUX, and the off threshold is 35-45 LUX.

Beneficial effect

The beneficial effect of the fill light device provided by the embodiment of the present application is that the fill light group includes a first light group, a second light group and a third light group, and the first light group, the second light group and the third light group emit light The center line is offset to different angles with respect to the vertical plane where the camera monitoring center line is located, and is inclined at different angles with respect to the horizontal plane, which can be irradiated to different positions of the area to be filled, to realize the divisional fill of the area to be filled, different The position can achieve uniform and good fill light, avoiding the problems of near overexposure and insufficient brightness in the distance caused by the same fill light at different positions such as near and far, and improving the overall fill of the area that is not waiting. Light effect, thereby improving the detection accuracy of camera video surveillance based on artificial intelligence algorithms.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only for the application For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without paying any creative labor.

FIG. 1 is a schematic diagram of a region of interest on a side of a vehicle body provided by an embodiment of this application;

FIG. 2 is a schematic diagram of the fill light provided by the fill light device provided by the embodiment of the present application as viewed from above the vehicle body;

3 is a schematic view of the fill light provided by the fill light device provided by the embodiment of the present application as viewed from the side of the vehicle body;

4 is a schematic structural diagram of a fill light group provided by an embodiment of the present application;

5 is a schematic diagram of a manner of dividing a region of interest on a side of a vehicle body provided by an embodiment of the present application;

6 is a schematic diagram of a module of a light supplement device provided by an embodiment of the present application.

Embodiments of the invention

In order to make the technical problems, technical solutions, and beneficial effects to be solved by the present application more clear, the following describes the present application in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

It should be noted that when a component is said to be “fixed” or “installed” on another component, it can be directly or indirectly located on the other component. When a component is said to be "connected to" another component, it can be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. The indicated orientation or position is based on the orientation or position shown in the drawings, which is only for convenience of description, and cannot be understood as a limitation to the technical solution. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more, unless specifically defined otherwise.

Please refer to FIG. 1. In the field of vehicle monitoring, the side of the body 10 is the full shooting area 11 of the camera. The camera needs to perform real-time video shooting on the full shooting area 11 to monitor the safety of the body 10 and the driving process. In the intelligent analysis of vehicle monitoring based on artificial intelligence, special attention is paid to certain areas in the video, that is, the artificial intelligence algorithm pays special attention and calculation to a part of the dangerous area on the side of the body 10, and the dangerous area is the interest of the artificial intelligence algorithm Region 12. The image of the region of interest 12 is required to be stable and uniform in brightness.

The total shooting area 11 on the side of the body 10 has a larger range, and the required fill light power is also larger. According to the current mainstream video surveillance sensor's sensitivity to 850nm infrared light is 30% of the visible light sensitivity and the maximum light efficiency of the 850nm fill light is 40%, the full shooting area 11 required for a 10-meter car The optical power is not less than 30W, but if only the area of interest 12 is to be filled, since the area of interest 12 is 30% of the total shooting area 11, the power is only about 10W.

The present application provides a fill light device 20 that is installed at the same position as the camera device and used in conjunction with the camera device to fill the side of the vehicle body 10, especially the region of interest 12.

Specifically, the fill light device 20 is provided on the rear upper portion of the side of the vehicle body 10 together with the imaging device. The camera device includes a camera, and the camera has a certain monitoring angle. The vertical plane where the monitoring center line 31 of the camera is located is defined as a reference center plane 32, and the reference center plane 32 is biased to the outside relative to the side of the body 10, as shown in FIG. 2, the monitoring center The line 31 is also biased downward relative to the horizontal plane 33, as shown in FIG. The angle of the monitoring center line 31 deviating downward with respect to the horizontal plane 33 is determined according to the monitoring angle of the camera, and the monitoring angle is large. The angle of the monitoring center line 31 deviating downward with respect to the horizontal plane 33 may be small. If the monitoring angle is small, the monitoring center line 31 The angle deviating downward with respect to the horizontal plane 33 needs to be large to fully cover the full shooting area 11 on the side of the body 10.

Referring to FIGS. 4 and 6, the fill light device 20 provided by the present application includes a fill light group 25 and a fill light control component 24. The fill light group 25 is configured to emit light to fill light for the region of interest 12, and the fill light control component 24 is set to detect the illuminance value of the ambient light, and controls to turn on or off the fill light group 25 according to the detected illuminance value of the ambient light and the size of the preset threshold.

The fill light group 25 includes a plurality of light groups, and the plurality of light groups are respectively irradiated to different positions of the region of interest 12 to respectively fill in different positions of the region of interest 12. According to the area size of the region of interest 12, a corresponding number of different positions can be divided.

In an embodiment, as shown in FIG. 4, the fill light group 25 includes a first light group 21, a second light group 22 and a third light group 23, and the region of interest 12 on the side of the vehicle body 10 is divided to include the first Zone 121, second zone 122 and third zone 123. The first lamp group 21 is set to fill the first zone 121, the second lamp group 22 is set to fill the second zone 122, and the third lamp group 23 is set to fill the third zone 123.

In an embodiment, the fill light group 25 may further include a fourth light group, and the area of interest 12 is further divided into a fourth area. Further, the fill light group 25 may further include a fifth light group, the area of interest 12 is also divided into the fifth area, no longer repeat. Any scheme that divides the region of interest 12 and uses multiple lamp groups to separately fill the region of interest 12 can be applied here.

The region of interest 12 may be divided in a way away from the fill light device 20 in sequence, may be divided in a way away from the side of the vehicle body 10 in sequence, or may be divided by combining the two ways.

In a specific embodiment, as shown in FIG. 5, the first area 121 is arranged close to the fill light device 20, and the second area 122 and the third area 123 are set away from the fill light device 20 relative to the first area 121. And the second area 122 is farther from the side of the body 10 than the third area 123.

The first lamp group 21 has a first lighting angle, the second lamp group 22 has a second lighting angle, and the third lamp group 23 has a third lighting angle. The range of fill light formed when different light angles are irradiated to the same distance is different. The light emitting angle is large, suitable for a wide range of fill light at a short distance, and the light emitting angle is small, suitable for a small range of fill light at a relatively long distance.

Corresponding to the first area 121, the second area 122, and the third area 123, the first light emitting angle is greater than the second light emitting angle, and the second light emitting angle is greater than the third light emitting angle.

The light emitting center line of the first lamp group 21 is the first center line 211, the light emitting center line of the second lamp group 22 is the second center line 221, and the light emitting center line of the third lamp group 23 is the third center line 231. Taking the side of the body 10 as a reference, as shown in FIG. 2, the second centerline 221 and the third centerline 231 are both deflected to the outside, where the first declination angle α1, the second declination angle α2, and the third declination angle α3. Taking the reference center plane 32 of the camera as a reference, the first center line 211 and the second center line 221 are both biased to the outside, and are set to fill the first area 121 and the second area 122, and the third center line 231 is biased to the inside, and set To fill the third area 123 with light.

Corresponding to the first area 121, the second area 122, and the third area 123, the first side angle α1 is smaller than the second side angle α2, and the second side angle α2 is larger than the third side angle α3.

As shown in FIG. 3, with the horizontal plane 33 as a reference, the first centerline 211, the second centerline 221, and the third centerline 231 all deviate downward, that is, a certain angle of inclination relative to the horizontal line, here set as the first inclination angle respectively β1, second downtilt angle β2, and third downtilt angle β3, so that the light of the first light group 21, the second light group 22, and the third light group 23 can cover the region of interest 12 on the side of the vehicle body 10 to the greatest extent.

Corresponding to the first zone 121, the second zone 122, and the third zone 123, the first downtilt angle β1 is greater than the second downtilt angle β2, and the second downtilt angle β2 is greater than the third downtilt angle β3.

The selection of the first light-emitting angle, the second light-emitting angle, and the third light-emitting angle is mainly determined according to the monitoring angle of the camera and with reference to the positions and ranges of the first area 121, the second area 122, and the third area 123.

The selection of the first side declination angle α1, the second side declination angle α2 and the third side declination angle α3 is mainly based on the positions and ranges of the first zone 121, the second zone 122 and the third zone 123, and refers to the first light emitting angle , The second light emitting angle and the third light emitting angle are determined.

The selection of the first downtilt angle β1, the second downtilt angle β2 and the third downtilt angle β3 is also mainly based on the positions and ranges of the first zone 121, the second zone 122 and the third zone 123, and refers to the first light emitting angle, the second The second light emission angle and the third light emission angle are determined.

Taking a camera lens with a focal length of 6 mm as an example, the monitoring range is 50 degrees. In a specific embodiment, the first light emitting angle is 40-50 degrees, such as 45 degrees, and the second light emitting angle is 25-35 degrees, such as 30 degrees. The third light emitting angle is 10-20 degrees, for example 15 degrees.

Further, the first lateral angle α1 is 8-10 degrees, for example 9 degrees, the second lateral angle α2 is 10-12 degrees, for example 11 degrees, and the third lateral angle α3 is 1-3 degrees for example Is 2 degrees. The offset angle of the reference center plane 32 of the camera relative to the side of the body 10 is greater than 0 degrees and less than 9 degrees.

Further, the first downtilt angle β1 is 14-16 degrees, for example 15 degrees, the second downtilt angle β2 is 7-9 degrees, for example 8 degrees, and the third downtilt angle β3 is 4-6 degrees, for example 5 degrees . The downward tilt angle of the reference centerline of the camera relative to the horizontal plane 33 is 5 to 15 degrees.

The first lamp group 21, the second lamp group 22, and the third lamp group 23 may each include one or more light emitting components. Optionally, as shown in FIG. 4, the first lamp group 21, the second lamp group 22, and the third lamp group 23 each include two light-emitting components, the first lamp group 21, the second lamp group 22, and the third lamp group The light-emitting center line in 23 is the light-emitting center line of the respective light-emitting components. The light-emitting center lines of the light-emitting components in the first lamp group 21, the second lamp group 22, and the third lamp group 23 are not parallel to each other, respectively facing different directions. direction.

In an embodiment, the light-emitting components in the first lamp group 21, the second lamp group 22, and the third lamp group 23 all emit infrared rays with a peak wavelength of 850 nm.

Further, the first lamp group 21, the second lamp group 22, and the third lamp group 23 are arranged on the carrying case 26, and the two light emitting components of the first lamp group 21 are arranged in a row, and are located in the second lamp group 22 Below the third lamp group 23, it is convenient to set the third downtilt angle, so as to supplement the light for the first area 121 at a short distance.

The two light-emitting components of the second lamp group 22 are arranged in one row, and the two light-emitting components of the third lamp group 23 are arranged in the other row. According to the second side deviation angle α2 and the third side deviation angle α3, one of the second lamp group 22 and the third lamp group 23 is disposed close to the side of the vehicle body 10. Therefore, in the present embodiment, the third light group 23 is disposed close to the side of the vehicle body 10 relative to the second light group 22.

As shown in FIG. 6, the fill light control component 24 is set to control the fill light group 25 to be turned on or off according to the magnitude between the illuminance value of the ambient light and the preset threshold to allow fill light when the ambient light is insufficient. When the ambient light is sufficient, stop the fill light to ensure the uniformity and stability of the brightness of the monitoring screen, so that the image captured by the camera at night can be as bright and uniform as the daytime, the brightness is sufficient, the screen is clean (no snowflakes), clear and transparent , To meet the requirements of artificial intelligence algorithms.

Specifically, the fill light control component 24 includes an ambient illuminance detection element 241 and a control element 242. The ambient illuminance detection element 241 is configured to detect the illuminance value of the ambient light and transmit the detected illuminance value to the control element 242, and the control element 242 compares The magnitude relationship between the detected illuminance value and the preset threshold value, and then the corresponding control operation of the fill light group 25 is performed.

Further, the ambient illuminance detection element 241 is a photodiode, and the preset threshold includes an on threshold and an off threshold. For different photodiodes, the turn-on threshold is not exactly equal, and the turn-off threshold is not completely equal. In a specific embodiment, the turn-on threshold may be 15~25 LUX, and the turn-off threshold may be 35~45 LUX.

When the photodiode detects that the illuminance value of the ambient light is less than or equal to the turn-on threshold, the control element 242 of the fill light control component 24 controls the fill light group 25 to turn on, and when the photodiode detects the illuminance value of the ambient light to be greater than or equal to the turn-off threshold At this time, the control element 242 controls the fill light group 25 to turn off.

The above are only optional embodiments of this application and are not intended to limit this application. Any modification, equivalent replacement and improvement made within the spirit and principle of this application should be included in the protection of this application Within range.

Claims

A fill light device, characterized in that it is set to fill light to a camera, and a vertical plane where the monitoring center line of the camera is located is defined as a reference center plane. The fill light device includes a fill light group, and the fill light The group includes:

The first lamp group has a first luminous angle, and the luminous center line of the first lamp group is biased to one side with respect to the reference center plane, and the luminous center line of the first lamp group is biased to one side with respect to the horizontal surface Oblique first downward angle;

The second lamp group has a second light emitting angle, and the light emitting center line of the second lamp group is biased to one side with respect to the reference center plane, and the light emitting center line of the second lamp group is one with respect to the horizontal surface Side deflection second downtilt angle; and

The third lamp group has a third light emitting angle, and the light emitting center line of the third lamp group is biased to the other side with respect to the reference center plane, and the light emitting center line of the third light group is relative to the horizontal plane The third angle of inclination on one side;

The angles of deviation of the first lamp group and the second lamp group with respect to the reference center plane are not equal;

The first down tilt angle, the second down tilt angle, and the third down tilt angle are not equal to each other.
The fill light device of claim 1, wherein the angle of the first lamp group deviating from the reference center plane is smaller than the angle of the second lamp group deviating from the reference center plane; The first downtilt angle is greater than the second downtilt angle, and the second downtilt angle is greater than the third downtilt angle.
The fill light device of claim 1, wherein the first light emitting angle is greater than the second light emitting angle, and the second light emitting angle is greater than the third light emitting angle.
The fill light device of claim 3, wherein the first light emitting angle is 40-50 degrees, the second light emitting angle is 25-35 degrees, and the third light emitting angle is 10-20 degrees .
The fill light device of claim 4, wherein the first light emitting angle is 45 degrees, the second light emitting angle is 30 degrees, and the third light emitting angle is 15 degrees.
The fill light device of claim 2, wherein the first downtilt angle is 14-16 degrees, the second downtilt angle is 7-9 degrees, and the third downtilt angle is 4-6 degrees .
The fill light device of claim 6, wherein the first downtilt angle is 15 degrees, the second downtilt angle is 8 degrees, and the third downtilt angle is 5 degrees.
The fill-light device according to claim 1, wherein the fill-light device is provided on the rear upper side of the side of the vehicle body, and is configured to fill-in the region of interest on the side of the vehicle body, the region of interest including the first region , A second zone and a third zone, the first zone is set close to the fill light device, the second zone is set away from the fill light device and away from the side of the vehicle body, the second zone is set to Away from the fill light device and close to the side of the vehicle body.
The fill light device according to claim 8, wherein the deviation angle of the first light group with respect to the side of the vehicle body is 8-10 degrees, and the deviation angle of the second light group with respect to the side of the vehicle body is 10~ At 12 degrees, the deviation angle of the third light group relative to the side of the vehicle body is 1 to 3 degrees.
The fill light device of claim 9, wherein the deviation angle of the first light group with respect to the side of the vehicle body is 9 degrees, and the deviation angle of the second light group with respect to the side of the vehicle body is 11 degrees The deviation angle of the third light group relative to the side of the vehicle body is 2 degrees.
The fill light device of claim 1, wherein the first lamp group is disposed below the second lamp group and the third lamp group, and the third lamp group is disposed relative to the first lamp group The second lamp group is close to the side of the body.
The fill light device of claim 11, wherein the first lamp group, the second lamp group, and the third lamp group each include two light emitting components.
The fill light device of claim 1, wherein the first lamp group, the second lamp group, and the third lamp group all emit infrared light having a peak wavelength of 850 nm.
The fill light device according to claim 1, wherein the fill light device further comprises a fill light control component, the fill light control component comprises an ambient light intensity detection element and a control element, the ambient light intensity detection element is set to To detect the illuminance value of the ambient light, the control element is configured to turn on or turn off the fill light group according to the detected illuminance value of the ambient light and the size of the preset threshold.
The fill light device according to claim 14, wherein the ambient illuminance detection element is a photodiode, and the preset threshold includes an on threshold and an off threshold; the on threshold is 15~25LUX, the off threshold 35~45LUX.