CN111046121A - Environment monitoring method, device and system - Google Patents
Environment monitoring method, device and system Download PDFInfo
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- CN111046121A CN111046121A CN201911236915.1A CN201911236915A CN111046121A CN 111046121 A CN111046121 A CN 111046121A CN 201911236915 A CN201911236915 A CN 201911236915A CN 111046121 A CN111046121 A CN 111046121A
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Abstract
The present disclosure relates to an environment monitoring method, apparatus and system, the method is applied to a geographic information system comprising a plurality of cameras disposed within a preset area, and can determine one or more target cameras from the plurality of cameras, the target cameras being disposed within a first preset range around a target location within the preset area; determining a target shooting angle of each target camera according to the overlapping area of the shooting range of the one or more target cameras and a second preset range around the target site; and generating an environment monitoring image of the target location through the image shot by each target camera at the target shooting angle. After the place needing to be monitored is determined, the camera around the place can shoot the image of the place at a proper angle so as to obtain the monitoring image of the place, and the comprehensiveness and the real-time performance of environment monitoring are improved.
Description
Technical Field
The present disclosure relates to the field of monitoring technologies, and in particular, to an environment monitoring method, apparatus, and system.
Background
A Geographic Information System (GIS) is widely used in environmental Information monitoring as an important tool for acquiring, processing, managing and analyzing geospatial data. Through the geographic information system, after a geographic position is selected, a user can view a map of a geographic area where the position is located, know the geographic environment in the area, and inquire and analyze environmental information. At present, a geographic information system comprises a cruise satellite, and after the satellite monitors abnormal conditions such as fire, sand blown by wind and the like in a certain place, the position information and the abnormal conditions of the place are sent to a GIS (geographic information system), and the position information and the abnormal conditions are displayed on a map through the GIS, so that the purposes of alarming a user and displaying the abnormal conditions are achieved. However, with the above method, the user can only view the position of the abnormal location and the satellite monitoring image of the abnormal location, and often cannot clearly know the environmental information around the location to determine the severity of the abnormal situation, so that the information provided for the user is not comprehensive enough, and the real-time performance is poor.
Disclosure of Invention
To overcome the problems in the related art, it is an object of the present disclosure to provide an environment monitoring method, apparatus, and system.
In order to achieve the above object, according to a first aspect of the embodiments of the present disclosure, there is provided an environment monitoring method applied to a geographic information system, where the geographic information system includes a plurality of cameras disposed in a preset area, the method including:
determining one or more target cameras from the plurality of cameras, wherein the target cameras are arranged in a first preset range around a target place in the preset area;
determining a target shooting angle of each target camera according to the overlapping area of the shooting range of the one or more target cameras and a second preset range around the target site;
and generating an environment monitoring image of the target location through an image shot by each target camera at the target shooting angle.
Optionally, before the determining one or more target cameras from the plurality of cameras, the method further includes:
determining the target location; the target place is an abnormal place detected by a preset environment detection unit, or a place designated by a map output by the geographic information system by a user.
Optionally, the determining a target shooting angle of each target camera according to an overlapping area of a shooting range of the one or more target cameras and a second preset range around the target location includes:
determining the overlapping area according to the shooting range of the one or more target cameras and the second preset range;
if the overlapping area is determined to be smaller than a preset area, adjusting the shooting angle of each target camera according to the shooting range and the second preset range so as to enable the overlapping area to be larger than the preset area, wherein the shooting angle comprises: the horizontal angle and the pitching angle of each target camera are positioned;
and taking the adjusted shooting angle as the target shooting angle.
Optionally, the determining the overlapping area according to the shooting range of the one or more target cameras and the second preset range includes:
determining the shooting range of each target camera according to the initial shooting angle, the geographic coordinate, the azimuth angle and the field angle of each target camera, wherein the initial shooting angle comprises: determining a horizontal angle and a pitch angle at which each of the target cameras is located when determining the target location;
determining the shooting range of the one or more target cameras according to the shooting range of each target camera;
and determining the overlapping area according to the shooting range of the one or more target cameras and the second preset range.
Optionally, the adjusting the shooting angle of each target camera according to the shooting range and the second preset range to make the overlapping area larger than the preset area includes:
acquiring the difference degree between the shooting range and the second preset range;
determining the shooting angle variation quantity required by adjusting each target camera according to the difference degree, the initial shooting angle, the geographic coordinate, the azimuth angle and the field angle;
and adjusting each target camera by the shooting angle variation to enable the overlapping area to be larger than the preset area.
Optionally, the generating an environment monitoring image of the target location through an image shot by each target camera at the target shooting angle includes:
acquiring an image shot by each target camera at the target shooting angle;
and converting the images shot by the one or more target cameras into the environment monitoring images according to the target shooting angle, the geographic coordinate, the azimuth angle and the field angle of each target camera.
According to a second aspect of the embodiments of the present disclosure, there is provided an environment monitoring apparatus applied to a geographic information system, the geographic information system including a plurality of cameras disposed in a preset area, the apparatus including:
the camera determining module is used for determining one or more target cameras from the plurality of cameras, and the target cameras are arranged in a first preset range around a target place in the preset area;
the angle determining module is used for determining the target shooting angle of each target camera according to the overlapping area of the shooting range of the one or more target cameras and a second preset range around the target site;
and the image generation module is used for generating an environment monitoring image of the target location through the image shot by each target camera at the target shooting angle.
Optionally, the apparatus further comprises:
a location determination module for determining the target location; the target place is an abnormal place detected by a preset environment detection unit, or a place designated by a map output by the geographic information system by a user.
Optionally, the angle determining module is configured to:
determining the overlapping area according to the shooting range of the one or more target cameras and the second preset range;
if the overlapping area is determined to be smaller than a preset area, adjusting the shooting angle of each target camera according to the shooting range and the second preset range so as to enable the overlapping area to be larger than the preset area, wherein the shooting angle comprises: the horizontal angle and the pitching angle of each target camera are positioned;
and taking the adjusted shooting angle as the target shooting angle.
Optionally, the angle determining module is configured to:
determining the shooting range of each target camera according to the initial shooting angle, the geographic coordinate, the azimuth angle and the field angle of each target camera, wherein the initial shooting angle comprises: determining a horizontal angle and a pitch angle at which each of the target cameras is located when determining the target location;
determining the shooting range of the one or more target cameras according to the shooting range of each target camera;
and determining the overlapping area according to the shooting range of the one or more target cameras and the second preset range.
Optionally, the angle determining module is configured to:
acquiring the difference degree between the shooting range and the second preset range;
determining the shooting angle variation quantity required by adjusting each target camera according to the difference degree, the initial shooting angle, the geographic coordinate, the azimuth angle and the field angle;
and adjusting each target camera by the shooting angle variation to enable the overlapping area to be larger than the preset area.
Optionally, the image generating module is configured to:
acquiring an image shot by each target camera at the target shooting angle;
and converting the images shot by the one or more target cameras into the environment monitoring images according to the target shooting angle, the geographic coordinate, the azimuth angle and the field angle of each target camera.
According to a third aspect of the embodiments of the present disclosure, there is provided an environment monitoring system including:
the cameras are distributed in a preset area; and
the environmental monitoring device provided by the second aspect of the embodiment of the present disclosure.
In summary, the method, the apparatus, and the system for environment monitoring provided by the present invention are applied to a geographic information system including a plurality of cameras disposed in a preset area, and can determine one or more target cameras from the plurality of cameras, where the target cameras are disposed in a first preset range around a target location in the preset area; determining a target shooting angle of each target camera according to the overlapping area of the shooting range of the one or more target cameras and a second preset range around the target site; and generating an environment monitoring image of the target location through the image shot by each target camera at the target shooting angle. After the place needing to be monitored is determined, the camera around the place can shoot the image of the place at a proper angle so as to obtain the monitoring image of the place, and the comprehensiveness and the real-time performance of environment monitoring are improved.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a flow diagram illustrating a method of environmental monitoring, according to an exemplary embodiment;
FIG. 2 is a flow chart of another method of environmental monitoring according to that shown in FIG. 1;
FIG. 3 is a flow chart of an angle determination method according to the one shown in FIG. 1;
FIG. 4 is a flow chart of an area determination method according to the one shown in FIG. 3;
FIG. 5 is a flow chart of an angle adjustment method according to FIG. 4;
FIG. 6 is a flow chart of an image generation method according to that shown in FIG. 5;
FIG. 7 is a block diagram illustrating an environmental monitoring device in accordance with an exemplary embodiment;
fig. 8 is a block diagram of another environment monitoring device according to fig. 7.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a flowchart illustrating an environment monitoring method according to an exemplary embodiment, where, as shown in fig. 1, the method is applied to a Geographic Information System (GIS), the GIS including a plurality of cameras disposed in a preset area, and the method includes:
in step 110, one or more target cameras are determined from the plurality of cameras.
The target camera is arranged in a first preset range around a target place in a preset area.
Illustratively, the positions of a plurality of cameras distributed in a preset area are recorded in the geographic information system (or its management unit) in advance. Each camera can monitor a part of the area in the preset area. The position information of all cameras in the preset area and the position information of the target location (designated by a user or judged by a system) are expressed by geographic coordinates (or universal longitude and latitude coordinates) in a GIS coordinate system provided by the GIS system. The first preset range may be a range in which the center of the target point is used and the preset distance is used as a radius. The camera with the coordinate in the first preset range is the target camera. In this way, after the target location in the preset area is determined, the target cameras distributed in the first preset range around the target location can be determined according to the position of each camera and the position of the target location.
In step 120, a target shooting angle of each target camera is determined according to an overlapping area of a shooting range of the one or more target cameras and a second preset range around the target point.
For example, the second preset range is a shooting range of the target location specified by the user, for example, for the specified location, the user needs to view an image within 10 meters of a square circle of the user, where the 10 meters of the square circle is the second preset range. The shooting range of the target camera needs to be completely overlapped with the second preset range as much as possible so as to achieve the best monitoring effect. In the embodiment of the disclosure, when the shooting area of the target camera and the second preset range are not completely overlapped (or the overlapping area is too small), the shooting angle of the target camera (or the shooting range of the target camera) may be adjusted according to the overlapping area, so that the shooting range of the target camera reaches the expectation.
In step 130, an environment monitoring image of the target location is generated from the image captured by each target camera at the target capturing angle.
For example, after each target camera is adjusted to a target shooting angle, since images shot by a plurality of target cameras may have an overlapping area, the images shot by each target camera need to be processed and combined (including removing the overlapping area, preprocessing pictures, etc.), so as to generate an environment monitoring image of a target location. Therefore, when the target place appears in the geographic information system, the map information around the target place can be checked by utilizing the map display function of the geographic information system, and the video image around the target place shot by the target camera can be checked through the target camera.
In summary, the environment monitoring method provided by the present invention can determine one or more target cameras from a plurality of cameras, where the target cameras are disposed in a first preset range around a target location in the preset area; determining a target shooting angle of each target camera according to the overlapping area of the shooting range of the one or more target cameras and a second preset range around the target site; and generating an environment monitoring image of the target location through the image shot by each target camera at the target shooting angle. After the place needing to be monitored is determined, the camera around the place can shoot the image of the place at a proper angle so as to obtain the monitoring image of the place, and the comprehensiveness and the real-time performance of environment monitoring are improved.
Fig. 2 is a flow chart of another environment monitoring method according to fig. 1, as shown in fig. 2, before the step 110, the method further includes:
in step 140, a target location is determined.
The target place is an abnormal place detected by a preset environment detection unit, or a place designated by a map output by the geographic information system by a user.
Illustratively, the geographic information system further includes an environment detection unit (e.g., a monitoring satellite) configured to detect environmental information in an area covered by the geographic information system, and if it is determined that an abnormal location occurs in the area, the abnormal location is taken as a target location, so as to monitor an environment around the target location through steps 110 to 130, and generate an environment monitoring image. Or, when the display unit of the geographic information system presents the map of the preset area to the user, the user designates a place to be viewed on the map through gesture operation, the place designated by the user is taken as a target place, and then the environment monitoring image around the target place is generated through steps 110 to 130.
Fig. 3 is a flow chart of an angle determination method according to fig. 1, as shown in fig. 3, the step 120 comprising:
in step 121, an overlapping area is determined according to the shooting range of the one or more target cameras and a second preset range.
For example, the overlapping area of the shooting range which can be shot by one or more target cameras and the second preset range is determined, and the larger the overlapping area is, the more comprehensive the information of the environment monitoring image of the second preset range shot by the target camera is. If the overlapping area is equal to the area of the second preset area, it is indicated that the shooting range of the one or more target cameras can completely cover the second preset range, and the user can view all images in the second preset area through the images shot by the target cameras.
In step 122, if it is determined that the overlap area is smaller than the predetermined area, the shooting angle of each target camera is adjusted according to the shooting range and the second predetermined range, so that the overlap area is larger than the predetermined area.
Wherein, this shooting angle includes: the horizontal angle and the pitch angle of each target camera.
In step 123, the adjusted shooting angle is set as the target shooting angle.
For example, due to the limitation of the position of the camera, the shooting angle, and the like, it is difficult for the shooting range of the target camera to completely cover the second preset range in most cases, that is, the overlapping area is smaller than the area of the second preset area. Therefore, a preset area is set, if the overlapping area is larger than or equal to the preset area, the shooting range of the target camera can cover most of the area in the second preset area, and a user can view a complete image around the target site through the image shot by the target camera. If the overlapping area is smaller than the preset area, the shooting range of the target camera can only cover a small part of area in a second preset area, and the obtained monitoring image is not comprehensive enough. At this time, the shooting range of the target camera can be changed by adjusting the horizontal angle and the pitch angle of the target camera, so that the overlapping area is increased until it is larger than the above-mentioned preset area (or full overlapping is achieved). Or, when this target camera set up on can freely moving unmanned aerial vehicle, can also be according to this overlap area, to the position at unmanned aerial vehicle place, and the shooting angle of the target camera that sets up on it adjusts simultaneously to make this overlap area increase, until it is greater than foretell preset area (or reach the complete overlap).
Fig. 4 is a flow chart of an area determination method according to fig. 3, as shown in fig. 4, the step 121 includes:
in step 1211, a shooting range of each target camera is determined according to an initial shooting angle, geographical coordinates, an azimuth angle, and a field angle of each target camera.
Wherein, this initial shooting angle includes: the horizontal angle and the pitch angle of each target camera when determining the target position.
In step 1212, determining the shooting range of the one or more target cameras according to the shooting range of each target camera.
In step 1213, an overlap area is determined according to the shooting range of the one or more target cameras and the second preset range.
For example, in a case where the shooting angle of each target camera is not adjusted (i.e., when the target location is determined), the shooting angle of each target camera in the first preset area is an initial shooting angle, and the initial shooting angle includes a horizontal angle and a pitch angle. And determining the shooting range of each target camera when the shooting angle is not adjusted according to the initial shooting angle, the geographic coordinates, the azimuth angle and the field angle of the target camera. The number of the target cameras may be one or more, and when only one target camera is determined, the shooting range of the target camera is the shooting range of the target camera; and when a plurality of target cameras are determined, fusing the shooting ranges of the target cameras according to a preset algorithm to determine the shooting ranges of all the target cameras in a first preset area.
Fig. 5 is a flowchart of an angle adjustment method according to fig. 4, wherein step 122 includes:
in step 1221, a difference between the shooting range and a second preset range is obtained.
In step 1222, the amount of change in the shooting angle required to adjust each target camera is determined based on the disparity, the initial shooting angle, the geographic coordinates, the azimuth angle, and the field angle.
In step 1223, each target camera is adjusted by the shooting angle variation so that the overlapping area is larger than a preset area.
Illustratively, the degree of difference includes a region area and a region position of a region that does not overlap between the second preset range and the shooting range. In the embodiment of the present disclosure, the geographic coordinate, the azimuth angle, and the field angle of each target camera are fixed and unchangeable, so that the shooting angle variation of each target camera can be determined and adjusted by using the geographic coordinate, the azimuth angle, and the field angle as parameters and using the difference and the shooting angle variation through a preset angle algorithm, and then each target camera is adjusted by using the shooting angle variation to reduce the difference until the overlapping area is larger than the preset area.
Fig. 6 is a flow chart of an image generation method according to fig. 5, as shown in fig. 6, the step 130 comprising:
in step 131, an image captured by each target camera at a target capturing angle is acquired.
In step 132, the images captured by the one or more target cameras are converted into environment monitoring images according to the target capturing angle, the geographic coordinates, the azimuth angle and the field angle of each target camera.
For example, after each target camera is adjusted to a target shooting angle, images shot by each target camera can be synthesized into at least one complete environment monitoring image according to the target shooting angle, the geographic coordinates, the azimuth angle and the field angle of each target camera, and the environment monitoring image is displayed to a user through a display unit in the GIS, so that the user can view environment information around the abnormal place.
In summary, the environmental monitoring method provided by the present invention is applied to a geographic information system including a plurality of cameras disposed in a preset area, and can determine one or more target cameras from the plurality of cameras, where the target cameras are disposed in a first preset range around a target location in the preset area; determining a target shooting angle of each target camera according to the overlapping area of the shooting range of the one or more target cameras and a second preset range around the target site; and generating an environment monitoring image of the target location through the image shot by each target camera at the target shooting angle. After the place needing to be monitored is determined, the camera around the place can shoot the image of the place at a proper angle so as to obtain the monitoring image of the place, and the comprehensiveness and the real-time performance of environment monitoring are improved.
Fig. 7 is a block diagram illustrating an environment monitoring apparatus according to an exemplary embodiment, as shown in fig. 7, applied to a geographic information system including a plurality of cameras disposed in a preset area, where the apparatus 700 may include:
a camera determination module 710, configured to determine one or more target cameras from the multiple cameras, where the target cameras are located within a first preset range around a target location in the preset area;
an angle determining module 720, configured to determine a target shooting angle of each target camera according to an overlapping area of the shooting range of the one or more target cameras and a second preset range around the target location;
and an image generating module 730, configured to generate an environment monitoring image of the target location through an image captured by each of the target cameras at the target capturing angle.
Fig. 8 is a block diagram of another environment monitoring apparatus according to fig. 7, as shown in fig. 8, the apparatus 700 further comprising:
a location determination module 740 for determining the target location; the target place is an abnormal place detected by a preset environment detection unit, or a place designated by a map output by the geographic information system by a user.
Optionally, the angle determining module 720 is configured to:
determining the overlapping area according to the shooting range of the one or more target cameras and the second preset range;
if the overlapping area is determined to be smaller than the preset area, adjusting the shooting angle of each target camera according to the shooting range and the second preset range so as to enable the overlapping area to be larger than the preset area, wherein the shooting angle comprises: the horizontal angle and the pitching angle of each target camera are positioned;
and taking the adjusted shooting angle as the target shooting angle.
Optionally, the angle determining module 720 is configured to:
determining the shooting range of each target camera according to the initial shooting angle, the geographic coordinates, the azimuth angle and the field angle of each target camera, wherein the initial shooting angle comprises: determining the horizontal angle and the pitch angle of each target camera when the target location is determined;
determining the shooting range of the one or more target cameras according to the shooting range of each target camera;
and determining the overlapping area according to the shooting range of the one or more target cameras and the second preset range.
Optionally, the angle determining module 720 is configured to:
acquiring the difference degree between the shooting range and the second preset range;
determining the shooting angle variation quantity required by adjusting each target camera according to the difference degree, the initial shooting angle, the geographic coordinate, the azimuth angle and the field angle;
and adjusting each target camera by the shooting angle variation to enable the overlapping area to be larger than the preset area.
Optionally, the image generating module 730 is configured to:
acquiring an image shot by each target camera at the target shooting angle;
and converting the images shot by the one or more target cameras into the environment monitoring image according to the target shooting angle, the geographic coordinate, the azimuth angle and the field angle of each target camera.
In summary, the method, the apparatus, and the system for environment monitoring provided by the present invention are applied to a geographic information system including a plurality of cameras disposed in a preset area, and can determine one or more target cameras from the plurality of cameras, where the target cameras are disposed in a first preset range around a target location in the preset area; determining a target shooting angle of each target camera according to the overlapping area of the shooting range of the one or more target cameras and a second preset range around the target site; and generating an environment monitoring image of the target location through the image shot by each target camera at the target shooting angle. After the place needing to be monitored is determined, the camera around the place can shoot the image of the place at a proper angle so as to obtain the monitoring image of the place, and the comprehensiveness and the real-time performance of environment monitoring are improved.
The present disclosure also provides an environment monitoring system, including:
the cameras are distributed in a preset area; and the number of the first and second groups,
the environment monitoring device provided by at least one embodiment of the present disclosure.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and other embodiments of the present disclosure may be easily conceived by those skilled in the art within the technical spirit of the present disclosure after considering the description and practicing the present disclosure, and all fall within the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. Meanwhile, any combination can be made between various different embodiments of the disclosure, and the disclosure should be regarded as the disclosure of the disclosure as long as the combination does not depart from the idea of the disclosure. The present disclosure is not limited to the precise structures that have been described above, and the scope of the present disclosure is limited only by the appended claims.
Claims (13)
1. An environment monitoring method is applied to a geographic information system, wherein the geographic information system comprises a plurality of cameras arranged in a preset area, and the method comprises the following steps:
determining one or more target cameras from the plurality of cameras, wherein the target cameras are arranged in a first preset range around a target place in the preset area;
determining a target shooting angle of each target camera according to the overlapping area of the shooting range of the one or more target cameras and a second preset range around the target site;
and generating an environment monitoring image of the target location through an image shot by each target camera at the target shooting angle.
2. The method of claim 1, wherein prior to said determining one or more target cameras from the plurality of cameras, the method further comprises:
determining the target location; the target place is an abnormal place detected by a preset environment detection unit, or a place designated by a map output by the geographic information system by a user.
3. The method according to claim 1, wherein the determining the target shooting angle of each target camera according to the overlapping area of the shooting range of the one or more target cameras and a second preset range around the target location comprises:
determining the overlapping area according to the shooting range of the one or more target cameras and the second preset range;
if the overlapping area is determined to be smaller than a preset area, adjusting the shooting angle of each target camera according to the shooting range and the second preset range so as to enable the overlapping area to be larger than the preset area, wherein the shooting angle comprises: the horizontal angle and the pitching angle of each target camera are positioned;
and taking the adjusted shooting angle as the target shooting angle.
4. The method according to claim 3, wherein the determining the overlapping area according to the shooting range of the one or more target cameras and the second preset range comprises:
determining the shooting range of each target camera according to the initial shooting angle, the geographic coordinate, the azimuth angle and the field angle of each target camera, wherein the initial shooting angle comprises: determining a horizontal angle and a pitch angle at which each of the target cameras is located when determining the target location;
determining the shooting range of the one or more target cameras according to the shooting range of each target camera;
and determining the overlapping area according to the shooting range of the one or more target cameras and the second preset range.
5. The method according to claim 4, wherein the adjusting the shooting angle of each target camera according to the shooting range and the second preset range so that the overlapping area is larger than the preset area comprises:
acquiring the difference degree between the shooting range and the second preset range;
determining the shooting angle variation quantity required by adjusting each target camera according to the difference degree, the initial shooting angle, the geographic coordinate, the azimuth angle and the field angle;
and adjusting each target camera by the shooting angle variation to enable the overlapping area to be larger than the preset area.
6. The method of claim 5, wherein generating the environment monitoring image of the target site from the image taken by each of the target cameras at the target taking angle comprises:
acquiring an image shot by each target camera at the target shooting angle;
and converting the images shot by the one or more target cameras into the environment monitoring images according to the target shooting angle, the geographic coordinate, the azimuth angle and the field angle of each target camera.
7. The utility model provides an environment monitoring device which characterized in that is applied to geographic information system, geographic information system is including setting up a plurality of cameras in the predetermined area, the device includes:
the camera determining module is used for determining one or more target cameras from the plurality of cameras, and the target cameras are arranged in a first preset range around a target place in the preset area;
the angle determining module is used for determining the target shooting angle of each target camera according to the overlapping area of the shooting range of the one or more target cameras and a second preset range around the target site;
and the image generation module is used for generating an environment monitoring image of the target location through the image shot by each target camera at the target shooting angle.
8. The apparatus of claim 7, further comprising:
a location determination module for determining the target location; the target place is an abnormal place detected by a preset environment detection unit, or a place designated by a map output by the geographic information system by a user.
9. The apparatus of claim 7, wherein the angle determining module is configured to:
determining the overlapping area according to the shooting range of the one or more target cameras and the second preset range;
if the overlapping area is determined to be smaller than a preset area, adjusting the shooting angle of each target camera according to the shooting range and the second preset range so as to enable the overlapping area to be larger than the preset area, wherein the shooting angle comprises: the horizontal angle and the pitching angle of each target camera are positioned;
and taking the adjusted shooting angle as the target shooting angle.
10. The apparatus of claim 9, wherein the angle determining module is configured to:
determining the shooting range of each target camera according to the initial shooting angle, the geographic coordinate, the azimuth angle and the field angle of each target camera, wherein the initial shooting angle comprises: determining a horizontal angle and a pitch angle at which each of the target cameras is located when determining the target location;
determining the shooting range of the one or more target cameras according to the shooting range of each target camera;
and determining the overlapping area according to the shooting range of the one or more target cameras and the second preset range.
11. The apparatus of claim 10, wherein the angle determining module is configured to:
acquiring the difference degree between the shooting range and the second preset range;
determining the shooting angle variation quantity required by adjusting each target camera according to the difference degree, the initial shooting angle, the geographic coordinate, the azimuth angle and the field angle;
and adjusting each target camera by the shooting angle variation to enable the overlapping area to be larger than the preset area.
12. The apparatus of claim 11, wherein the image generation module is configured to:
acquiring an image shot by each target camera at the target shooting angle;
and converting the images shot by the one or more target cameras into the environment monitoring images according to the target shooting angle, the geographic coordinate, the azimuth angle and the field angle of each target camera.
13. An environmental monitoring system, comprising:
the cameras are distributed in a preset area; and
the environmental monitoring device of any one of claims 7 to 12.
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