Variable Light POE Camera

Abstract

The present invention provides a variable-light POE camera, which collects the shooting status information during the execution of the shooting task and the light information of the surrounding environment, so as to change the fill light irradiation state of the external fill light operation, ensuring that the camera can obtain high-definition and highly recognizable image data in different shooting spectral bands; at the same time, according to the execution status of the shooting task, the power supply status of the POE power supply end to the camera is adjusted, so that the POE power supply end can change the power supply mode to the camera during the execution of the shooting task by the camera, ensuring the sustainability of the power supply of the POE power supply end and avoiding power supply abnormalities during the normal completion of all shooting tasks by the camera.

Description

Technical Field

[0001] The present invention relates to the technical field of cameras, and particularly to a variable-light POE camera. Background Art

[0002] Network cameras are widely used in distributed camera monitoring systems. The network cameras are powered by the POE power supply method, which can ensure that the network cameras can upload image data to the corresponding terminal platforms while ensuring the normal power supply of the network cameras. The existing POE cameras are all realized by using a single-mode power supply method for the cameras, that is, the POE power supply state of the cameras is fixed. However, when the POE cameras execute different shooting tasks, the corresponding power supply requirements such as the power supply duration are different. If only a single mode is used to supply power to the POE cameras, it is impossible to ensure that the POE cameras can complete the shooting tasks normally and ensure the complete collection of image data. In addition, the existing POE cameras cannot fill light for the shooting scene, reducing the clarity and recognizability of the obtained image data. Summary of the Invention

[0003] In view of the defects existing in the prior art, the present invention provides a variable-light POE camera, which collects the shooting state information during the execution of the shooting task and the light information of the environment where it is located, so as to change the supplementary light irradiation state of the supplementary light operation outward, and ensure that the camera can obtain high-definition and highly recognizable image data in different shooting spectral bands; at the same time, according to the execution state of the shooting task, it adjusts the power supply state of the POE power supply end to the camera, so that the POE power supply end can change the power supply mode to the camera during the execution of the shooting task by the camera, and ensure the sustainability of the power supply of the POE power supply end and avoid power supply anomalies during the normal completion of all shooting tasks by the camera.

[0004] The present invention provides a variable-light POE camera, which includes:

[0005] A camera for shooting a target area to obtain an image of the target area;

[0006] A pan-tilt head connected to the camera for adjusting the shooting posture of the camera;

[0007] A shooting state detection module for collecting the corresponding shooting state information during the execution of the shooting task by the camera;

[0008] An environmental light sensing module for detecting the light information of the environment where the camera is located;

[0009] A supplementary light module for changing the supplementary light irradiation state of the supplementary light operation outward according to the light information and the shooting state information of the camera;

[0010] A POE power supply control module, which is used to adjust the power supply state of the POE power supply terminal to the camera according to the execution status of the shooting task of the camera;

[0011] An image collection and processing module, which is used to collect the target area image captured by the camera, convert the target area image into an image data packet, and upload it to the monitoring and management platform.

[0012] Further, the camera is a multi-spectral camera, which is used to switch to the corresponding spectral band according to the shooting task instruction from the monitoring platform to shoot the target area, and obtain the corresponding target area image;

[0013] The pan-tilt is a six-degree-of-freedom pan-tilt, which is used to adjust the shooting posture of the camera according to the posture change instruction from the monitoring platform;

[0014] The environmental light sensing module is an environmental illuminance and environmental light band sensing module, which is used to detect the illuminance information and light band distribution information of the environment where the camera is located.

[0015] Further, the pan-tilt adjusts the shooting posture of the camera according to the posture change instruction from the monitoring platform, which specifically includes:

[0016] The pan-tilt parses and processes the posture change instruction from the monitoring platform to obtain the posture change target direction and posture change target value corresponding to the posture change instruction;

[0017] According to the posture change target direction, it is judged whether the pan-tilt is currently in the direction consistent with the posture change target direction;

[0018] If so, directly adjust the shooting posture of the camera in the current direction according to the posture change target value;

[0019] If not, then determine the best direction switching path for the pan-tilt to switch from the current direction to the posture change target direction according to the relative direction deviation information between the posture change target direction and the current direction of the pan-tilt; then, after switching from the current direction to the posture change target direction according to the best direction switching path, adjust the shooting posture of the camera according to the posture change target value.

[0020] Further, the camera switches to the corresponding spectral band according to the shooting task instruction from the monitoring platform to shoot the target area, and obtain the corresponding target area image, which specifically includes:

[0021] The camera parses and processes the shooting task instruction to determine the spectral band corresponding to the desired shooting; according to the matching situation between the spectral band corresponding to the desired shooting and the several spectral bands allowed for shooting by the camera, it switches to the corresponding spectral band shooting mode to shoot the target area and obtains the corresponding target area image.

[0022] Further, the camera switching to the corresponding spectral band shooting mode to shoot the target area specifically includes:

[0023] If the spectral band corresponding to the desired shooting is within one of the spectral bands allowed for shooting by the camera, it switches to the spectral band shooting mode corresponding to one of the spectral bands allowed for shooting by the camera to shoot the target area;

[0024] If the spectral band corresponding to the desired shooting overlaps with two or more spectral bands allowed for shooting by the camera, the camera sequentially switches to the spectral band shooting modes corresponding to the overlapping spectral bands to shoot the target area, and during the execution of each spectral band shooting mode, the pan-tilt head is maintained to adjust the camera in the same shooting posture.

[0025] Further, the supplementary light module includes a light source array composed of several light sources with different emission spectra;

[0026] The supplementary light module changing the supplementary light irradiation state for external supplementary light according to the illumination information and the shooting state information of the camera specifically includes:

[0027] The supplementary light module determines the illumination intensity information corresponding to each band in the ambient light of the environment according to the illuminance information and the light band distribution information; according to the illumination intensity information, it determines the bands in the ambient light of the environment that are in a state of insufficient illumination intensity;

[0028] According to the difference between the actual illumination intensity value of the band in the state of insufficient illumination intensity and the preset illumination intensity threshold, it instructs the light sources in the light source array with the corresponding emission spectra to increase their own luminous brightness.

[0029] Further, the POE power supply control module adjusting the power supply state of the POE power supply terminal to the camera according to the execution state of the shooting task of the camera specifically includes:

[0030] Obtaining the execution progress of the current shooting task of the camera and the corresponding shooting task queue state information; wherein, the shooting task queue state information includes the execution duration of each shooting task in the queue formed by all the shooting tasks that the camera needs to execute and the total number of shooting tasks;

[0031] Adjust the power supply duration of the POE power supply end to the camera according to the execution progress and the shooting task queue status information.

[0032] Further, the image collection and processing module collects the target area images captured by the camera, and converts the target area images into image data packets and uploads them to the monitoring and management platform, which specifically includes:

[0033] The image collection and processing module independently collects the target area images corresponding to each shooting task executed by the camera, compresses the target area images corresponding to each shooting task to obtain corresponding image data packets; after identifying the image data packets, uploads them to the monitoring and management platform.

[0034] Further, the image collection and processing module independently collects the target area images corresponding to each shooting task executed by the camera, and compresses the target area images corresponding to each shooting task to obtain corresponding image data packets; after identifying the image data packets, uploads them to the monitoring and management platform, which specifically includes:

[0035] Step S1, use the following formula (1) to perform data compression processing on the target area images corresponding to each shooting task.

[0036]

[0037] In the above formula (1), h a represents the matrix data after compression of the target area image corresponding to the a-th shooting task; H a represents the matrix data before compression of the target area image corresponding to the a-th shooting task; H a (i, j) represents the pixel value of the pixel at the i-th row and j-th column in the image matrix before compression of the target area image corresponding to the a-th shooting task; H a-1 (i, j) represents the pixel value of the pixel at the i-th row and j-th column in the image matrix before compression of the target area image corresponding to the (a - 1)-th shooting task; n represents the total number of pixel points in any column in the image matrix before compression of the target area image corresponding to the a-th shooting task; m represents the total number of pixel points in any row in the image matrix before compression of the target area image corresponding to the a-th shooting task; || represents taking the absolute value; and represents the logical relationship AND; {0} represents the zero matrix.

[0038] Step S2, use the following formula (2) to obtain the compression identification value according to the compressed image data packet and the data before compression.

[0039]

[0040] In the above formula (2), Y represents the compression identification value; Q() represents a judgment function. If the arithmetic expression in the parentheses holds, the function value of the judgment function is 1. If the arithmetic expression in the parentheses does not hold, the function value of the judgment function is 0; G represents the total number of shooting tasks.

[0041] Step S3, if decompression processing is required, if the compression identification value Y is equal to 1, decompression is not required. If the value of Y is equal to 0, the following formula (3) is used to decompress the image data packet.

[0042]

[0043] In the above formula (3), H' a represents the matrix data of the target area image corresponding to the a-th shooting task after decompression; F(h' a-e ≠{0}) means that the value of e is gradually increased from 0 until the value of a - e is obtained when h' a-e ≠{0}. represents the matrix data of the compressed target area image corresponding to the F(h' a-e ≠{0})-th shooting task.

[0044] Compared with the prior art, the variable light POE camera collects the shooting status information and the illumination information of the environment during the execution of the shooting task, and thus changes the supplementary light irradiation state of the external supplementary light operation, ensuring that the camera can obtain high-definition and high-recognizability image data in different shooting spectral bands; at the same time, according to the shooting task execution status, it adjusts the power supply status of the POE power supply end to the camera, so that the POE power supply end can change the power supply mode to the camera during the execution of the shooting task by the camera, ensuring the power supply sustainability of the POE power supply end and avoiding power supply anomalies during the normal completion of all shooting tasks by the camera.

[0045] Other features and advantages of the present invention will be described in the following description, and, in part, will be obvious from the description, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the written description, claims, and drawings.

[0046] The technical solutions of the present invention will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0048] Figure 1 It is a schematic structural diagram of a variable - light POE camera provided by the present invention. Specific embodiments

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0050] Refer to Figure 1 , which is a schematic structural diagram of a variable - light POE camera provided by the embodiments of the present invention. The variable - light POE camera includes:

[0051] A camera for shooting a target area to obtain a target - area image;

[0052] A pan - tilt head connected to the camera for adjusting the shooting posture of the camera;

[0053] A shooting - state detection module for collecting the corresponding shooting - state information during the process of the camera executing the shooting task;

[0054] An ambient - light sensing module for detecting the light - illumination information of the environment where the camera is located;

[0055] A supplementary - light module for changing the supplementary - light irradiation state of the outward supplementary - light operation according to the light - illumination information and the shooting - state information of the camera;

[0056] A POE power - supply control module for adjusting the power - supply state of the POE power - supply end to the camera according to the execution state of the shooting task of the camera;

[0057] An image - collection and processing module for collecting the target - area image captured by the camera, converting the target - area image into an image data packet, and uploading it to the monitoring and management platform.

[0058] The beneficial effects of the above technical solution are as follows: The variable light POE camera collects the shooting state information during the execution of the shooting task and the light information of the surrounding environment, and accordingly changes the supplementary light irradiation state of the external supplementary light operation, ensuring that the camera can obtain high-definition and highly recognizable image data in different shooting spectral bands; at the same time, according to the execution state of the shooting task, it also adjusts the power supply state of the POE power supply end to the camera, enabling the POE power supply end to change the power supply mode to the camera during the execution of the shooting task by the camera, ensuring the sustainability of the power supply of the POE power supply end and avoiding power supply abnormalities during the normal completion of all shooting tasks by the camera.

[0059] Preferably, the camera is a multi-spectral camera, which is used to switch to the corresponding spectral band according to the shooting task instruction from the monitoring platform to shoot the target area and obtain the corresponding target area image;

[0060] The pan-tilt head is a six-degree-of-freedom pan-tilt head, which is used to adjust the shooting posture of the camera according to the posture change instruction from the monitoring platform;

[0061] The environmental light sensing module is an environmental illuminance and environmental light band sensing module, which is used to detect the illuminance information and light band distribution information of the environment where the camera is located.

[0062] The beneficial effects of the above technical solution are as follows: By setting the camera as a multi-spectral camera, the camera can shoot in the visible light band and the infrared light band respectively. When the monitoring platform issues a shooting task instruction for a specific spectral band, the camera can switch to the corresponding spectral band to shoot the target object. By setting a six-degree-of-freedom pan-tilt head, the camera can be driven to adjust the shooting posture in the pitch direction and the yaw direction respectively, so that the shooting field of view of the camera can be aligned with the target area for shooting. By setting the environmental light sensing module to have the functions of detecting environmental illuminance and environmental light band, the illuminance size information and light band analysis information of the environment where the camera is located can be obtained, which is convenient for subsequently adjusting the working state of the supplementary light module in a targeted manner.

[0063] Preferably, the pan-tilt head adjusts the shooting posture of the camera according to the posture change instruction from the monitoring platform, which specifically includes:

[0064] The pan-tilt head parses and processes the posture change instruction from the monitoring platform to obtain the posture change target direction and posture change target value corresponding to the posture change instruction;

[0065] According to the posture change target direction, it is judged whether the pan-tilt head is currently in the direction consistent with the posture change target direction;

[0066] If so, directly change the target value according to the pose, and adjust the shooting pose of the camera in the current direction;

[0067] If not, determine the best direction switching path for the pan-tilt head to switch from the current direction to the target direction of pose change according to the relative direction deviation information between the target direction of pose change and the current direction of the pan-tilt head; then, according to the best direction switching path, after switching from the current direction to the target direction of pose change, adjust the shooting pose of the camera according to the target value of pose change.

[0068] The beneficial effects of the above technical solution are as follows: By the above method, the target direction of pose change (i.e., the pitch direction or the yaw direction) and the target value of pose change (i.e., the angle change value in the pitch direction or the yaw direction) corresponding to the pose change of the pan-tilt head are extracted from the pose change instruction, and then compared with the current direction of the pan-tilt head, which can ensure that the pan-tilt head quickly and accurately executes the pose change instruction, thereby ensuring that the shooting pose of the camera is accurately adjusted to align with the target area for shooting. Among them, the best direction switching path can be, but is not limited to, the shortest switching path for the pan-tilt head to switch from the current direction to the target direction of pose change, and the switching time corresponding to the shortest switching path is the shortest.

[0069] Preferably, the camera switches to the corresponding spectral band according to the shooting task instruction from the monitoring platform to shoot the target area, and obtains the corresponding target area image, which specifically includes:

[0070] The camera parses and processes the shooting task instruction to determine the spectral band corresponding to the desired shooting; according to the matching situation between the spectral band corresponding to the desired shooting and the several spectral bands allowed to be shot by the camera, it switches to the corresponding spectral band shooting mode to shoot the target area, and obtains the corresponding target area image.

[0071] The beneficial effects of the above technical solution are as follows: By the above method, the spectral band corresponding to the desired shooting by the monitoring platform is extracted from the shooting task instruction, and then compared with the several spectral bands allowed to be shot by the camera, so as to ensure that the camera automatically switches to the corresponding spectral band shooting mode to shoot the target area, and ensure that the obtained target area image meets the requirements of the shooting task instruction. Among them, the spectral band shooting module refers to the shooting operation for a specific spectral band, and the specific spectral band can be, but is not limited to, a single spectral band such as red light, green light or blue light, or a wide-range spectral band such as visible light or infrared light.

[0072] Preferably, the camera switches to the corresponding spectral band shooting mode to shoot the target area, which specifically includes:

[0073] If the spectral band corresponding to the desired shooting is within one of the spectral bands allowed for shooting by the camera, switch to the spectral band shooting mode corresponding to one of the spectral bands allowed for shooting by the camera to shoot the target area;

[0074] If the spectral band corresponding to the desired shooting overlaps with two or more spectral bands allowed for shooting by the camera, the camera sequentially switches to the spectral band shooting modes corresponding to the overlapping spectral bands to shoot the target area, and during the execution of each spectral band shooting mode, keep the pan-tilt head adjusting the camera in the same shooting posture, so as to ensure that the image scene ranges obtained by each spectral band shooting mode are exactly the same.

[0075] The beneficial effects of the above technical solution are: By the above method, it can be ensured that the camera shoots in different spectral bands, so that the spectral band of the image of the target area finally shot by the camera matches the shooting task instruction.

[0076] Preferably, the supplementary light module includes a light source array composed of several light sources with different emission spectra;

[0077] The supplementary light module changes the supplementary light irradiation state of performing supplementary light operation outward according to the illumination information and the shooting state information of the camera, which specifically includes:

[0078] The supplementary light module determines the illumination intensity information corresponding to each band in the ambient light of the environment according to the illuminance information and the light band distribution information; according to the illumination intensity information, determines the bands in the ambient light of the environment that are in a state of insufficient illumination intensity;

[0079] According to the difference between the actual illumination intensity value of the band in the state of insufficient illumination intensity and the preset illumination intensity threshold, instruct the light source in the light source array with the corresponding emission spectrum to increase its own luminous brightness.

[0080] The beneficial effects of the above technical solution are: In actual work, compare the illumination intensity value corresponding to each band with the corresponding intensity threshold. If the illumination intensity value is less than the corresponding intensity threshold, then determine the corresponding band as the band in the state of insufficient illumination intensity. At this time, according to the difference between the illumination intensity value and the corresponding intensity threshold, instruct the light source in the light source array with the corresponding emission spectrum to increase its own luminous brightness to make up for the illumination intensity of the band in the state of insufficient illumination intensity.

[0081] Preferably, the POE power supply control module adjusts the power supply state of the POE power supply end to the camera according to the execution state of the shooting task of the camera, which specifically includes:

[0082] Obtain the execution progress of the current shooting task of the camera and the corresponding shooting task queue status information; wherein, the shooting task queue status information includes the execution duration of each shooting task in the queue formed by all shooting tasks that the camera needs to execute and the total number of shooting tasks.

[0083] Adjust the power supply duration of the POE power supply end to the camera according to the execution progress and the shooting task queue status information.

[0084] The beneficial effects of the above technical solution are as follows: In actual work, according to the execution progress of the current shooting task of the camera, it is judged whether the camera has completed the current shooting task, and according to the shooting task queue status information, the total duration required for the camera to complete all shooting tasks in the shooting task queue is determined. When the camera has not completed the current shooting task, the POE power supply end is instructed to continue to supply power to the camera. It is also possible to instruct the POE power supply end to continuously supply power to the camera within the corresponding time period of the total duration required for the camera to complete all shooting tasks in the shooting task queue.

[0085] Preferably, the image collection and processing module collects the target area image captured by the camera, and converts the target area image into an image data packet and uploads it to the monitoring and management platform, specifically including:

[0086] The image collection and processing module independently collects the target area images corresponding to each shooting task executed by the camera, compresses the target area images corresponding to each shooting task to obtain corresponding image data packets; after identifying the image data packets, uploads them to the monitoring and management platform.

[0087] The beneficial effects of the above technical solution are as follows: Through the above method, the target area images corresponding to each shooting task are separately compressed, the image data packets obtained by compression are marked with the shooting task name, and uploaded to the monitoring and management platform, which is convenient for subsequent individual identification and analysis of each image data packet, and avoids the situation of image data identification confusion and crosstalk.

[0088] Preferably, the image collection and processing module independently collects the target area images corresponding to each shooting task executed by the camera, and compresses the target area images corresponding to each shooting task to obtain corresponding image data packets; after identifying the image data packets, uploads them to the monitoring and management platform, specifically including:

[0089] Step S1, use the following formula (1) to perform data compression processing on the target area images corresponding to each shooting task,

[0090]

[0091] In the above formula (1), ha represents the matrix data after compression of the target area image corresponding to the a-th shooting task; H a represents the matrix data of the target area image before compression corresponding to the a-th shooting task; H a (i, j) represents the pixel value of the pixel at the i-th row and j-th column in the image matrix of the target area image before compression corresponding to the a-th shooting task; H a-1 (i, j) represents the pixel value of the pixel at the i-th row and j-th column in the image matrix of the target area image before compression corresponding to the (a - 1)-th shooting task; n represents the total number of pixel points in any column of the image matrix of the target area image before compression corresponding to the a-th shooting task; m represents the total number of pixel points in any row of the image matrix of the target area image before compression corresponding to the a-th shooting task; || represents taking the absolute value; and represents the logical relationship AND; {0} represents the zero matrix;

[0092] Step S2, using the following formula (2), according to the compressed image data packet and the data before compression, obtain the compression identification value,

[0093]

[0094] In the above formula (2), Y represents the compression identification value; Q() represents a judgment function. If the arithmetic expression in the parentheses holds, the function value of the judgment function is 1. If the arithmetic expression in the parentheses does not hold, the function value of the judgment function is 0; G represents the total number of shooting tasks;

[0095] Step S3, if decompression processing is required, if the compression identification value Y is equal to 1, no decompression is needed. If the value of Y is equal to 0, use the following formula (3) to decompress the image data packet,

[0096]

[0097] In the above formula (3), H' a represents the matrix data of the target area image corresponding to the a-th shooting task after decompression; F(h' a-e ≠{0}) means increasing the value of e from 0 and gradually increasing it until the value of a - e that satisfies h' a-e ≠{0} is obtained; represents the matrix data after compression of the target area image corresponding to the F(h' a-e ≠{0})-th shooting task.

[0098] The beneficial effects of the above technical solution are as follows: By using the above formula (1), data compression processing is performed on the target area images corresponding to each shooting task, thereby compressing the data to improve the speed and efficiency of the system for data transmission, processing, and storage; then, by using the above formula (2), based on the compressed image data packet and the data before compression, a compression identification value is obtained, so as to know whether the data is truly compressed. If it is not truly compressed, decompression is not required, which improves the rapid response ability of the system and reduces useless work and calculations; finally, by using the above formula (3), the image data packet is decompressed to ensure the consistency and accuracy of the decompressed data and the original data.

[0099] As can be seen from the content of the above embodiments, the variable light POE camera collects the shooting status information and the light information of the environment during the execution of the shooting task, and changes the supplementary light irradiation status of the external supplementary light operation accordingly, ensuring that the camera can obtain high-definition and highly recognizable image data in different shooting spectral bands; at the same time, according to the execution status of the shooting task, the power supply status of the POE power supply end to the camera is adjusted, so that the POE power supply end can change the power supply mode to the camera during the execution of the shooting task by the camera, ensuring the sustainability of the power supply of the POE power supply end and avoiding power supply abnormalities during the normal completion of all shooting tasks by the camera.

[0100] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. Variable light POE camera, characterized in that, It includes: A camera for photographing a target area to obtain a target area image; A pan-tilt head connected to the camera for adjusting the photographing posture of the camera; A photographing state detection module for collecting corresponding photographing state information during the process of the camera executing a photographing task; An ambient light sensing module for detecting the light information of the environment where the camera is located; A fill light module for changing the fill light irradiation state of performing fill light operation outward according to the light information and the photographing state information of the camera; A POE power supply control module for adjusting the power supply state of the POE power supply end to the camera according to the execution state of the photographing task of the camera; An image collection and processing module for collecting the target area image photographed by the camera, converting the target area image into an image data packet, and uploading it to a monitoring and management platform; wherein, the image collection and processing module collecting the target area image photographed by the camera, converting the target area image into an image data packet, and uploading it to the monitoring and management platform specifically includes: The image collection and processing module independently collects the target area image corresponding to each photographing task executed by the camera, performs compression processing on the target area image corresponding to each photographing task to obtain a corresponding image data packet; after identifying the image data packet, upload it to the monitoring and management platform; Wherein, the image collection and processing module independently collects the target area image corresponding to each photographing task executed by the camera, performs compression processing on the target area image corresponding to each photographing task to obtain a corresponding image data packet; after identifying the image data packet, uploading it to the monitoring and management platform specifically includes: Step S1, using the following formula (1) to perform data compression processing on the target area image corresponding to each photographing task, In the above formula (1), h a represents the matrix data after compression of the target area image corresponding to the a-th shooting task; H a represents the matrix data before compression of the target area image corresponding to the a-th shooting task; H a (i, j) represents the pixel value of the pixel at the i-th row and j-th column in the image matrix before compression of the target area image corresponding to the a-th shooting task; H a-1 (i, j) represents the pixel value of the pixel at the i-th row and j-th column in the image matrix before compression of the target area image corresponding to the (a - 1)-th shooting task; n represents the total number of pixel points in any column in the image matrix before compression of the target area image corresponding to the a-th shooting task; m represents the total number of pixel points in any row in the image matrix before compression of the target area image corresponding to the a-th shooting task; | | represents taking the absolute value; and represents the logical relationship AND; {0} represents the zero matrix; Step S2, using the following formula (2) to obtain a compression identification value according to the compressed image data packet and the data before compression, In the above formula (2), Y represents the compression identification value; Q() represents a judgment function. If the arithmetic expression in the parentheses holds, the function value of the judgment function is 1. If the arithmetic expression in the parentheses does not hold, the function value of the judgment function is 0; G represents the total number of photographing tasks; Step S3, if decompression processing is required, if the compression identification value Y is equal to 1, no decompression is required. If the value of Y is equal to 0, use the following formula (3) to decompress the image data packet, In the above formula (3), H′ a represents the matrix data of the target area image corresponding to the a-th shooting task after decompression; F(h′ a-e ≠{0}) represents the value of a - e when the value of e is gradually increased from 0 until h′ a-e ≠{0} is obtained; represents the compressed matrix data of the target area image corresponding to the F(h′ a-e ≠{0})-th shooting task.

2. The variable light POE camera according to claim 1, characterized in that: The camera is a multi-spectral camera for switching to a corresponding spectral band to photograph the target area according to a photographing task instruction from the monitoring and management platform to obtain a corresponding target area image; The pan-tilt head is a six-degree-of-freedom pan-tilt head for adjusting the photographing posture of the camera according to a posture change instruction from the monitoring and management platform; The ambient light sensing module is an ambient light intensity and ambient light band sensing module for detecting the illuminance information and light band distribution information of the environment where the camera is located.

3. The variable - light POE camera according to claim 2, wherein: The pan - tilt head adjusts the shooting posture of the camera according to the posture change instruction from the monitoring and management platform, which specifically includes: The pan - tilt head parses and processes the posture change instruction from the monitoring and management platform to obtain the posture change target direction and the posture change target value corresponding to the posture change instruction; According to the posture change target direction, it is judged whether the pan - tilt head is currently in the direction consistent with the posture change target direction; If so, directly adjust the shooting posture of the camera in the current direction according to the posture change target value; If not, determine the best direction switching path for the pan - tilt head to switch from the current direction to the posture change target direction according to the relative direction deviation information between the posture change target direction and the current direction of the pan - tilt head; then, after switching from the current direction to the posture change target direction according to the best direction switching path, adjust the shooting posture of the camera according to the posture change target value.

4. The variable - light POE camera according to claim 3, wherein: The camera switches to the corresponding spectral band to shoot the target area according to the shooting task instruction from the monitoring and management platform, and obtains the corresponding target area image, which specifically includes: the camera parses and processes the shooting task instruction to determine the spectral band corresponding to the expected shooting; according to the matching situation between the spectral band corresponding to the expected shooting and the several spectral bands allowed for the camera to shoot, switch to the corresponding spectral band shooting mode to shoot the target area and obtain the corresponding target area image.

5. The variable - light POE camera according to claim 4, wherein: The camera switches to the corresponding spectral band shooting mode to shoot the target area, which specifically includes: If the spectral band corresponding to the expected shooting is within one of the spectral bands allowed for the camera to shoot, switch to the spectral band shooting mode corresponding to one of the spectral bands allowed for the camera to shoot to shoot the target area; If the spectral band corresponding to the expected shooting overlaps with two or more spectral bands allowed for the camera to shoot, the camera sequentially switches to the spectral band shooting modes corresponding to the overlapping spectral bands to shoot the target area, and during the execution of each spectral band shooting mode, keep the pan - tilt head adjusting the camera with the same shooting posture.

6. The variable - light POE camera according to claim 5, wherein: The supplementary light module includes a light source array composed of several light sources with different emission spectra; The supplementary light module changes the supplementary light irradiation state of the outward supplementary light operation according to the illumination information and the shooting state information of the camera, which specifically includes: The supplementary light module determines the illumination intensity information corresponding to each band in the ambient light of the environment according to the illuminance information and the light - band distribution information; according to the illumination intensity information, determine the bands in the ambient light of the environment in the state of insufficient illumination intensity; According to the difference between the actual light intensity value of the band in the insufficient light intensity state and the preset light intensity threshold, it is indicated that the light source in the light source array with the corresponding emission spectrum increases its own light emission brightness.

7. The variable light POE camera according to claim 6, wherein: The POE power supply control module adjusts the power supply state of the camera by the POE power supply end according to the execution status of the shooting task of the camera, specifically including: Obtaining the execution progress of the current shooting task of the camera and the corresponding shooting task queue status information; wherein, the shooting task queue status information includes the execution duration of each shooting task in the queue formed by all shooting tasks that the camera needs to execute and the total number of shooting tasks; According to the execution progress and the shooting task queue status information, the power supply duration of the camera by the POE power supply end is adjusted.

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