CN112381053A - Environment-friendly monitoring system with image tracking function - Google Patents
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Abstract
The invention belongs to the field of environment-friendly detection, and particularly relates to an environment-friendly monitoring system capable of tracking image targets in a sensitive area. The system comprises a sensing layer, a network layer and an application layer. The sensing layer utilizes a bottom layer instrument, a sensor and equipment to collect data information and utilizes a camera to realize the collection of environment image information of a sensitive area. And the network layer processes and transmits the data information obtained by the sensing layer. The application layer realizes the functions of equipment management and maintenance, monitoring and early warning, production scheduling, real-time data curve display, abnormal warning and the like according to the obtained data information. The invention can be applied to an environment-friendly monitoring system.
Description
Technical Field
The invention belongs to the field of environment-friendly detection, relates to an environment-friendly monitoring system with an image tracking function, and particularly relates to an environment-friendly monitoring system capable of tracking image targets in a sensitive area.
Background
The environmental monitoring has important application value in the fields of sewage treatment, pollution gas treatment, construction management and the like. The environmental monitoring system based on the internet of things technology integrates information collected by various sensors, video monitoring, infrared detection, GPS, RFID, satellite remote sensing and the like, realizes collection of various environmental data information of a monitored area, realizes early warning through information processing and integration, and avoids serious pollution. Especially for some important sensitive areas, such as power distribution rooms, machine rooms, operation rooms and the like, video monitoring is needed. When a person enters the system in an unauthorized period, the monitoring camera can lock the moving target, and the target is continuously tracked by the driving of the holder. In order to ensure that stable tracking of the target can be effectively realized in different time periods, the tracking algorithm should have good adaptability and stability. At present, deep learning shows excellent performance in the field of target tracking, but a target tracking method based on deep learning generally requires a large number of training samples and performs long-time training, which puts high requirements on hardware configuration of a system, and causes increase of system hardware cost and runtime cost. The traditional tracking method is usually small in operation amount and low in system hardware requirement, but certain instability exists in tracking performance.
Therefore, the target tracking method with better adaptability is designed, and the method has good application value for improving the performance of the environment-friendly monitoring system.
Disclosure of Invention
The invention aims to solve the technical problem that in order to improve the intelligent level of an environment-friendly monitoring system, the environment-friendly monitoring system with the image target detection and tracking functions is designed, environment information is detected by a sensor, a camera is used for monitoring a sensitive area, an unauthorized entering target is tracked, and alarm is realized.
The technical scheme adopted by the invention is as follows: an environment-friendly monitoring system with an image target tracking function comprises a three-layer structure of a sensing layer, a network layer and an application layer. The sensing layer utilizes a bottom layer instrument, a sensor and equipment to collect data information and utilizes a camera to realize the collection of environment image information of a sensitive area. And the network layer processes and transmits the data information obtained by the sensing layer. The application layer realizes the functions of equipment management and maintenance, monitoring and early warning, production scheduling, real-time data curve display, abnormal warning and the like according to the obtained data information.
The invention aims to construct an environment-friendly detection system which can collect environmental information and can monitor images of a sensitive area, and the environment-friendly detection system has good practicability.
Drawings
FIG. 1 is a schematic diagram of a target area and a non-target area in an image of a scene.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The sensing layer collects various data information such as temperature, humidity and air pollutants of an environment to be monitored, and image information of a monitoring sensitive area is collected through the camera. When the monitoring sensitive area is in a state of prohibiting personnel from entering, if a moving target is found, the camera is driven by the holder to track the target. The system transmits various monitoring data acquired by the sensing layer, sensitive area images monitored by the camera, whether moving objects enter and other information to the application layer through the network layer. And the application layer stores, displays and alarms according to the acquired data.
For the sensitive areas to be monitored, such as a power distribution room, a machine room, an operation room and the like, an image acquisition device is installed, and the image acquisition device carries out image monitoring on the sensitive areas through a camera driven by a holder. The image acquisition device has two working states, one is a normal scanning shooting state, and the other is a target detection tracking state. The sensitive areas monitored are only accessible to authorized personnel. After authorized personnel input the password for verification, the image acquisition device in the monitored sensitive area works in a normal scanning and shooting state, at the moment, the cradle head drives the camera to continuously rotate, and the shot image is transmitted to the application layer through the network layer. Authorized personnel leave the sensitive area and input an instruction for prohibiting entering, the image acquisition device works in a target detection tracking state, at the moment, the image acquisition device detects whether a moving target exists in the sensitive area, background images of a monitoring scene corresponding to all positions of a holder are prestored in the image acquisition device, the holder in the image acquisition device drives a camera to continuously rotate, target detection is carried out by using a background difference method according to the currently acquired position image and the background image of the prestored position, and when the target is not found, the target detection is carried out by continuously using the background difference method, and image information is transmitted to an application layer through a network layer; when a moving target is detected, the target is tracked, and simultaneously, the image and the alarm information are transmitted to an application layer through a network layer.
When the image acquisition device works in a target detection tracking state, a moving target area is determined by using a background difference method, the moving target area is selected as a tracked target, and the tracked target is tracked by adopting a target tracking method of characteristic weighting matching.
The target tracking method of feature weighted matching respectively establishes a template and a non-target area gray histogram model around the template, determines the enhancement weight coefficient of each gray level according to the template gray histogram model, determines the suppression weight coefficient of each gray level according to the non-target area histogram model around the template, adopts a weighted matching mode, highlights the matching function of the main gray level of the template, suppresses the matching function of the main gray level of the non-target area, and thus improves the accuracy of target identification.
The size of the target tracking template A is set to be M multiplied by N, and the length and the width of the target area of the current frame are expanded outwards in each direction to form a non-target area B, as shown in figure 1. Establishing a gray histogram model q according to the pixel gray value of the target tracking template AAEstablishing a gray histogram model q according to the pixel gray value of the non-target area BB. Mixing ashThe degree value is divided into m levels, and the position coordinate of each pixel in the template is set as { (x)i,yi) 1, 2, …, s. Corresponding to a gray scale characteristic value of bA(xi,yi) Gray level feature histogram model of template
Where δ is the korneecker function.
The gray level target weight value is defined as:
wherein q isA uAnd q isA vRespectively representing the number of pixels of the u-th and v-th gray levels of the target template. w is aA uIs the target weight value of the u-th gray level.
Let the position coordinates of each pixel in the non-target region be { (x)j,yj) 1, 2, …, t. Corresponding to a gray scale characteristic value of bB(xj,yj) Then the histogram model of the gray scale features of the non-target area is
The gray level non-target weighting value is defined as:
wherein q isB uAnd q isB vRespectively representing the number of pixels of the u-th and v-th gray levels of the non-target area. w is aB uA non-target weight value for the u-th gray level.
Pixel point (x) in template image Ai,yi) Has a gray value of fA(xi,yi) And the corresponding pixel point (x) in the matching area C of the image to be matched with the template image A with the same sizei,yi) Has a gray value of fC(xi,yi) The corresponding gray scale characteristic value is bC(xi,yi) Then, the matching value D of the template image A and the image matching area CCIs defined as:
and traversing and searching the template A in a search area of the image to be matched, and positioning the matching area with the maximum matching value as a target position. And taking the newly positioned target area as a template, and continuously positioning the target in the next frame, thereby realizing the continuous tracking of the target.
When the matching criterion function is calculated, the distribution information of the gray levels in the template and the non-target area is considered, the matching value of the pixel points with the main gray level in the template plays a main role, and the matching effect of the pixel points with the main gray level in the non-target area is inhibited, so that the matching result can highlight the main characteristics of the template, inhibit the interference of the background and be beneficial to improving the matching accuracy. Compared with the traditional target tracking method, the method has better target positioning accuracy.
The method has the advantages that the pixel points with the main gray scale of the template image in the matching criterion function of the tracking method play a main role, the matching effect of the pixel points with the main gray scale in the non-target area is inhibited, the image target can be positioned in a more complex background, the target positioning accuracy is improved, and the monitoring reliability of the environment-friendly monitoring system on the sensitive area can be improved.
Claims (4)
1. An environment-friendly monitoring system with an image tracking function is characterized in that the system comprises a three-layer structure of a sensing layer, a network layer and an application layer; the sensing layer collects data information by using a bottom instrument, a sensor and equipment, and collects environmental image information of a sensitive area by using a camera; the network layer processes and transmits the data information obtained by the sensing layer; the application layer realizes the functions of equipment management and maintenance, monitoring and early warning, production scheduling, real-time data curve display, abnormal warning and the like according to the obtained data information.
2. The environmental monitoring system with the image tracking function according to claim 1, wherein an image acquisition device is installed in a sensitive area to be monitored, such as a power distribution room, a machine room, an operation room and the like, and the image acquisition device is used for carrying out image monitoring on the sensitive area by a camera driven by a holder; the image acquisition device has two working states, one is a normal scanning shooting state, and the other is a target detection tracking state; after authorized personnel input the password for verification, the image acquisition device in the monitored sensitive area works in a normal scanning and shooting state, at the moment, the cradle head drives the camera to continuously rotate, and the shot image is transmitted to the application layer through the network layer; authorized personnel leave the sensitive area and input an instruction for prohibiting entering, the image acquisition device works in a target detection tracking state, at the moment, the image acquisition device detects whether a moving target exists in the sensitive area, background images of a monitoring scene corresponding to all positions of a holder are prestored in the image acquisition device, the holder in the image acquisition device drives a camera to continuously rotate, target detection is carried out by using a background difference method according to the currently acquired position image and the background image of the prestored position, and when the target is not found, the target detection is carried out by continuously using the background difference method, and image information is transmitted to an application layer through a network layer; when a moving target is detected, the target is tracked, and simultaneously, the image and the alarm information are transmitted to an application layer through a network layer.
3. The environmental monitoring system with the image tracking function according to claim 1, wherein when the image acquisition device works in a target detection tracking state, after a moving target area is determined by a background difference method, the moving target area is selected as a tracked target, and the tracked target is tracked by a target tracking method of feature weighting matching; the target tracking method of feature weighted matching respectively establishes a template and a non-target area gray histogram model around the template, determines the enhancement weight coefficient of each gray level according to the template gray histogram model, determines the suppression weight coefficient of each gray level according to the non-target area histogram model around the template, adopts a weighted matching mode, highlights the matching function of the main gray level of the template, suppresses the matching function of the main gray level of the non-target area, and thus improves the accuracy of target identification.
4. The environmental monitoring system with image tracking function according to claim 1, wherein the size of the target tracking template a is mxn, and the length and width of the target area of the current frame are extended outward in each direction to form a non-target area B; establishing a gray histogram model q according to the pixel gray value of the target tracking template AAEstablishing a gray histogram model q according to the pixel gray value of the non-target area BBDividing the gray scale value into m levels, and setting the position coordinate of each pixel in the template as { (x)i,yi) 1, 2, …, s; corresponding to a gray scale characteristic value of bA(xi,yi) Gray level feature histogram model of template
Where δ is the korneecker function, the gray level target weighting value is defined as:
wherein q isA uAnd q isA vThe pixel numbers respectively representing the u-th and v-th gray levels of the target template; w is aA uA target weight value for the u-th gray level; let the position coordinates of each pixel in the non-target region be { (x)j,yj) 1, 2, …, t; corresponding to a gray scale characteristic value of bB(xj,yj) Then the histogram model of the gray scale features of the non-target area is
The gray level non-target weighting value is defined as:
wherein q isB uAnd q isB vThe number of pixels respectively representing the u-th and v-th gray levels of the non-target area; w is aB uA non-target weight value for the u-th gray level; pixel point (x) in template image Ai,yi) Has a gray value of fA(xi,yi) And the corresponding pixel point (x) in the matching area C of the image to be matched with the template image A with the same sizei,yi) Has a gray value of fC(xi,yi) The corresponding gray scale characteristic value is bC(xi,yi) Then, the matching value D of the template image A and the image matching area CCIs defined as:
traversing and searching the template A in a search area of an image to be matched, and positioning the matching area with the maximum matching value as a target position; and taking the newly positioned target area as a template, and continuously positioning the target in the next frame, thereby realizing the continuous tracking of the target.
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