CN111263116B - Intelligent monitoring system based on visual distance - Google Patents
Intelligent monitoring system based on visual distance Download PDFInfo
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- CN111263116B CN111263116B CN202010095683.9A CN202010095683A CN111263116B CN 111263116 B CN111263116 B CN 111263116B CN 202010095683 A CN202010095683 A CN 202010095683A CN 111263116 B CN111263116 B CN 111263116B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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Abstract
The invention discloses an intelligent monitoring system based on visual distance, which comprises the following equipment: a target object monitoring device for monitoring a target object existing in the walking area; the image positioning device is used for positioning the target object after the target object monitoring device identifies the target object; and the distance recognition equipment is used for taking the target object positioning as a reference point, measuring and calculating to form a desired point according to the moving speed and the moving direction of the target object within a period of time, comparing the desired point with a position point where the target object is actually located within another period of time, and triggering a reminding signal if the difference between the desired point and the position point is greater than a preset distance threshold. Through the technical scheme, the target object can be monitored more perfectly.
Description
Technical Field
The invention relates to the technical field of video monitoring, in particular to an intelligent monitoring system based on a visual distance.
Background
In the field of video monitoring technology, face recognition of a target object is a common technical means. However, the face recognition effect may not be satisfactory in some environments such as the dark. In this case, the monitoring apparatus still needs to monitor the object present in the monitoring range in case of unauthorized person entry.
Among many technical means of monitoring, the difference caused by whether the target object moves forward at a certain speed in the monitoring area due to the familiarity with the environment is not considered by the technical personnel in the related field, but objectively, the method is an effective idea capable of perfecting the monitoring effect.
In addition, people familiar with the environment also have the technical problems that people who are not capable of advancing at a certain speed due to work needs, such as cleaning and sweeping people, and how to eliminate the people is one of the technical problems to be solved by the technical means in the related technical field.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention solves the technical problem of an intelligent monitoring system which is based on visual distance and can achieve better monitoring effect.
In order to solve the technical problems, the technical scheme adopted by the invention specifically comprises the following contents:
an intelligent monitoring system based on visual distance, comprising the following devices:
a target object monitoring device for monitoring a target object existing in the walking area;
the image positioning device is used for positioning the target object after the target object monitoring device identifies the target object;
and the distance recognition equipment is used for taking the target object positioning as a reference point, measuring and calculating to form a desired point according to the moving speed and the moving direction of the target object within a period of time, comparing the desired point with a position point where the target object is actually located within another period of time, and triggering a reminding signal if the difference between the desired point and the position point is greater than a preset distance threshold.
To achieve the above object of the invention, the inventors have inventively combined in the present technical solution a technique using an image localization apparatus and a distance recognition apparatus. Specifically, for a person familiar with the monitored area, the person moves in a certain speed and direction within the walking area, while for a person unfamiliar with the monitored area, the person moves in a relatively fixed direction and speed within the walking area, which is a difference caused by different familiarity of the environment. The monitoring system of the technical scheme assists in more perfect monitoring of the intelligent monitoring equipment by utilizing the point, so that a certain judgment can be carried out on the target object under the condition that other monitoring modes (such as face recognition monitoring) are poor in effect.
More specifically, after the image positioning device positions the target object identified by the target object monitoring device, that is, the target object is positioned as a reference point, the moving speed and the moving direction of the target object are measured and calculated within a period of time (such as 10s, 20s or 1 min) to form a desired point; and then further comparing the actual position of the target after another period of time (e.g., 10s, 20s, or 1 min). And if the distance difference between the expected point and the position point is too large, triggering a reminding signal.
It should be noted that the preset distance threshold may be measured by an actual distance (e.g. 3m, 5m, etc.), or may be measured by a distance between a desired point and a position point on the image (e.g. 3cm, 5cm, etc.).
Through the technical scheme, the moving distance of the target object can be monitored, the target object with the overlarge difference of the actual position points can be identified as suspicious personnel in the system, and the reminding signal is triggered to improve the actual effects such as the monitoring accuracy of the target object.
Preferably, the distance recognition device and the image localization device specifically perform the following steps:
after the datum point is obtained, the distance identification device continuously positions the datum point within the time t1, and records the moving speed v1 of the datum point within the time t1 and the moving direction d1 of the datum point; calculating the position of the reference point, namely a desired point after t2 time passes according to the v1 and the d 1;
the image positioning device moves within the time t2 at the moving speed v1 and the moving direction d1, and after t2, the target object is secondarily positioned to obtain a position point.
In a specific technical solution, on one hand, the distance recognition device measures the moving speed v1 and the moving direction d1 of the target object (i.e. the reference point) within the time t1, and obtains the specific position of the reference point, i.e. the expected point of the target object after the time t2 through the directions v1 × t2 and d 1; on the other hand, the image positioning apparatus moves in the t2 direction at v1 and d1 at the same time, and after t2, performs the second positioning on the object to obtain the specific position where the object is located, that is, the position point. And the distance identification equipment compares and judges the distance difference between the expected point and the position point.
More preferably, the distance recognition apparatus continues to locate the reference point for a time t2 at the same time, records the moving speed v1 'of the reference point for a time t2, and the moving direction d 1' of the reference point; correcting according to the v1, d1, v1 'and d 1' to obtain a moving speed v2 and a moving direction d2 of the reference point in the total time of t1 and t2, and calculating a second expected point which is the position of the reference point after t3 time;
the image positioning device moves within t3 at a moving speed v2 and a moving direction d2, and after t3 is passed, the target object is positioned three times to obtain a second position point;
and comparing the second expected point with the second position point, and triggering a reminding signal if the difference between the expected point and the position point and the difference between the second expected point and the second position point are both greater than a preset distance threshold.
In order to further improve the recognition of the moving speed and the moving direction of the target object, errors that may occur are corrected. In a further preferred embodiment, the inventor designs that the image locating device continues to track the movement of the target object during time t2 on the one hand, and the distance recognizing device continues to locate the reference point during time t2 on the other hand, records the movement speed and the movement direction of the reference point, i.e., the target object during time t2, and measures a second desired point, i.e., the position where the target object is located after time t3, using the average movement speed and the average movement direction of the target object during two periods t1 and t 2.
And likewise, the image localization apparatus moves at v2 and d2 for time t3, and locates the object a third time after t3 to obtain its second position point.
And when the comparison is judged, the expected point and the position point, and the second expected point and the second position point are respectively compared.
In a preferred embodiment, when two conditions that the difference between the expected point and the position point is greater than a preset distance threshold and the difference between the second expected point and the second position point is greater than the preset distance threshold are met simultaneously, it is determined that the target object does not move regularly on the walking track, and a warning signal is triggered.
More preferably, the image positioning device is provided with a monitoring image; after the reference point is obtained, the reference point is placed in the central point of the monitoring image, and after a position point is obtained through t2, the position point is also placed in the monitoring image; and comparing the difference between the central point and the position point.
In a preferred embodiment, the comparison of the position and distance may be performed by comparing each point in the image. The image positioning device can generate a monitoring image after monitoring, and simulate the target object as a reference point to be formed on the monitoring image, and preferably form the reference point on the central point of the monitoring image, so that the length and the width of the monitoring image can be utilized to the maximum extent, and the defect that the subsequent position points are drawn and cannot be directly compared with the points on the image is avoided.
Then, after the position point is obtained at t2, the position point is also placed in the monitoring image, the difference between the central point and the position point is compared, and the central point is the desired point at the same time, so that the comparison between the desired point and the position point is realized. Through the technical scheme, comparison and judgment can be directly carried out on the image, so that the method is more visual on one hand and is simpler and more convenient on the other hand.
Further, the time length of t1 is equal to that of t 2.
It should be noted that, when the time lengths of t1 and t2 are equal, the comparison between the calculated expected point and the actual position point is more accurate.
Further, the time lengths of t1, t2 and t3 are all greater than 10 s.
It should be noted that, when the time lengths of t1, t2 and t3 are all greater than 10s, the moving speed and direction of the target object can be better judged, and errors formed in a short time are avoided, so that the monitoring and calculating effects are improved. Preferably, the object moves in a line-like manner within the walking area.
It should be noted that, when the walking area is set to be a straight-line-like area, the target object can move in a straight line manner in the walking area, which is more beneficial to the monitoring and judgment of the monitoring system and improves the reliability of the monitoring result.
It should be noted that the straight-like line refers to a substantially straight line, and is not limited to a single form of a complete straight line.
Preferably, the walking robot further comprises at least two gravity sensing devices, wherein the gravity sensing devices are laid on the walking area; the gravity sensing device performs the following steps:
measuring the gravity of the target object passing through the same or different gravity sensing equipment in unit time, obtaining a difference value delta g of the gravity, judging the delta g, and triggering a reminding signal if the delta g is smaller than a preset gravity threshold; or if the Δ g is larger than the preset threshold value of gravity, triggering a stop reminding signal.
It should be noted that in some cases, it may occur that safety personnel familiar with the environment do not move at a certain speed within the walking area, such as cleaning workers. To avoid false triggering of the alert signal to such personnel. The inventors have in a further preferred embodiment incorporated a gravity sensing device in the monitoring device to address this problem.
The inventor has utilized this characteristic that gravity changes during operation of such cleaning workers. When working, cleaning personnel usually carry some equipment on their back, and the weight of the cleaning agent on their body is consumed by spraying the cleaning agent onto the ground. Or the burden of gravity is increased when the ground garbage is cleaned. I.e., it changes under its own weight in a situation similar to the operation of these two cleaning persons. And at least two gravity sensing devices are arranged in the walking area, so that the gravity of the personnel can be measured in real time. The reason for having two at least gravity-sensing devices is that can measure the gravity of the same person passing through different gravity-sensing devices simultaneously in a period of time, also can measure the gravity of the same person passing through the same gravity-sensing device repeatedly in a period of time. After measurement, obtaining a difference value delta g of gravity, judging the delta g, and triggering a reminding signal if the delta g is smaller than a preset threshold value of the gravity.
More preferably, when the gravity sensing device measures the gravity of the target object and a continuous gravity value occurs, the maximum gravity value of the target object passing through the gravity sensing device is taken as a basis for calculating the difference Δ g of the gravity.
It should be noted that, when the gravity is measured, a situation that both feet are not simultaneously on the gravity sensing device may occur, and when such a situation occurs, the gravity sensing device may determine that, if the gravity continuously occurs, the maximum gravity value of the target object passing through the gravity sensing device is used as a basis for calculating the difference Δ g of the gravity.
Preferably, the system further comprises a face recognition device and a background database;
the face recognition equipment is used for recognizing the face image of the target object, comparing the face image with a safe face in a background database, and triggering a stopping reminding signal if the face image is judged to be safe.
It should be noted that, in order to improve the accuracy of the above-mentioned visual distance monitoring technical scheme and prevent the false triggering of the alert signal to the target object, a face recognition device is still added in the preferred embodiment, so that the effective operation of the above-mentioned visual distance monitoring technical scheme can be ensured through multi-party monitoring confirmation, and the effectiveness and the completeness of the monitoring thereof are improved. Compared with the prior art, the invention has the beneficial effects that:
1. the intelligent monitoring system based on the visual distance can monitor the moving distance of the target object, identify the target object with overlarge difference of actual position points as suspicious personnel in the system and trigger a reminding signal so as to improve the actual effects of monitoring accuracy and the like of the target object;
2. according to the intelligent monitoring system based on the visual distance, the image positioning equipment is designed to continuously track the movement of the target object within the time t2 so as to further improve the cognition on the movement speed and the movement direction of the target object and correct errors which may occur; 3. according to the intelligent monitoring system based on the visual distance, the comparison and judgment of the position distance are realized through the comparison of each point in the image, and the comparison and judgment can be directly carried out on the image, so that the system is more visual and simpler;
4. according to the intelligent monitoring system based on the visual distance, the gravity sensing device is added into the monitoring device to solve the problem, the reminding signals are prevented from being triggered by the personnel by mistake, and the monitoring accuracy is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a flow chart of the operation of a preferred embodiment of the intelligent visual distance-based monitoring system of the present invention;
FIG. 2 is a diagram of the connection relationship of the equipment in a preferred embodiment of the intelligent monitoring system based on visual distance according to the present invention;
FIG. 3(a) is a schematic diagram of a stage of determining and setting a center reference point for a monitoring image in another preferred embodiment of the intelligent monitoring system based on visual distance according to the present invention;
fig. 3(b) is a schematic diagram of the stage of determining and calculating the position point of the monitoring image in fig. 3 (a).
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention with reference to the accompanying drawings and preferred embodiments is as follows:
example 1
Fig. 1 is a flow chart illustrating the operation of an intelligent monitoring system based on visual distance according to the present invention, which includes the following devices:
a target object monitoring device for monitoring a target object existing in the walking area;
the image positioning device is used for positioning the target object after the target object monitoring device identifies the target object;
and the distance recognition equipment is used for taking the target object positioning as a reference point, measuring and calculating to form a desired point according to the moving speed and the moving direction of the target object within a period of time, comparing the desired point with a position point where the target object is actually located within another period of time, and triggering a reminding signal if the difference between the desired point and the position point is greater than a preset distance threshold.
The distance recognition device and the image positioning device specifically execute the following steps:
after the datum point is obtained, the distance identification device continuously positions the datum point within the time t1, and records the moving speed v1 of the datum point within the time t1 and the moving direction d1 of the datum point; calculating the position of the reference point, namely a desired point after t2 time passes according to the v1 and the d 1;
the image positioning device moves within the time t2 at the moving speed v1 and the moving direction d1, and after t2, the target object is secondarily positioned to obtain a position point.
In a specific technical solution, on one hand, the distance recognition device measures the moving speed v1 and the moving direction d1 of the target object (i.e. the reference point) within the time t1, and obtains the specific position of the reference point, i.e. the expected point of the target object after the time t2 through the directions v1 × t2 and d 1; on the other hand, the image positioning apparatus moves in the t2 direction at v1 and d1 at the same time, and after t2, performs the second positioning on the object to obtain the specific position where the object is located, that is, the position point. And the distance identification equipment compares and judges the distance difference between the expected point and the position point. In the present embodiment, the inventors have creatively combined the technique of utilizing the image positioning apparatus and the distance recognition apparatus to achieve the technical effect of improving the monitoring accuracy. Specifically, for a person familiar with the monitored area, the person moves in the walking area at a certain speed and direction, while for a person not familiar with the environment of the monitored area, the person moves in the walking area at a relatively fixed direction and speed, which is a difference caused by different familiarity of the environment. The monitoring system of the technical scheme assists in more perfect monitoring of the intelligent monitoring equipment by utilizing the point, so that a certain judgment can be carried out on the target object under the condition that other monitoring modes (such as face recognition monitoring) are poor in effect.
In the present embodiment, t1 and t2 are both 20 s. In other preferred embodiments, t1 and t2 may be equal or different, and the specific time may be 10s, 20s, 1min, or the like. When the time lengths of t1 and t2 are equal, the comparison of the calculated expected point and the actual position point is more accurate.
In this embodiment, v1 may be calculated using the actual moving speed of the target object or the moving speed in the video, as long as it is unified with the subsequent calculation unit. Specifically, the distance between the actual image positioning device and the target object can be selected so as to perform better calculation. In contrast, the preset distance threshold may be measured by an actual distance (e.g., 3m, 5m, etc.), or may be measured by a distance between a desired point and a position point on the image (e.g., 3cm, 5cm, etc.).
In this embodiment, the target object monitoring device may be implemented by a specific device structure such as a camera, for example, a binocular camera; the image positioning device and the video recognition device can be integrated in a terminal to be realized, wherein the information of the image positioning device can be obtained through pictures monitored and shot by the camera. In a specific embodiment, the terminal device may be a personal computer or the like. In addition, the terminal equipment is also provided with a result returning module for triggering a reminding signal according to the judgment result. The result returning module can be connected with a mobile phone, a monitor or an alarm system of a monitoring person in an extensible manner to realize the subsequent alarm effect monitoring, and specifically refer to fig. 2.
Example 2
This embodiment describes another preferred embodiment of the intelligent monitoring system based on visual distance. Compared with the above embodiment 1, the present embodiment is characterized in that:
the distance identification equipment continues to locate the reference point within the time t2 at the same time, and records the moving speed v1 'of the reference point within the time t2 and the moving direction d 1' of the reference point; correcting according to the v1, d1, v1 'and d 1' to obtain a moving speed v2 and a moving direction d2 of the reference point in the total time of t1 and t2, and calculating a second expected point which is the position of the reference point after t3 time;
the image positioning device moves within t3 at a moving speed v2 and a moving direction d2, and after t3 is passed, the target object is positioned three times to obtain a second position point;
and comparing the second expected point with the second position point, and triggering a reminding signal if the difference between the expected point and the position point and the difference between the second expected point and the second position point are both greater than a preset distance threshold.
In the present embodiment, in order to further improve the recognition of the moving speed and the moving direction of the target object, errors that may occur are corrected. In a further preferred embodiment, the inventor designs that the image locating device continues to track the movement of the target object during time t2 on the one hand, and the distance recognizing device continues to locate the reference point during time t2 on the other hand, records the movement speed and the movement direction of the reference point, i.e., the target object during time t2, and measures a second desired point, i.e., the position where the target object is located after time t3, using the average movement speed and the average movement direction of the target object during two periods t1 and t 2.
And likewise, the image localization apparatus moves at v2 and d2 for time t3, and locates the object a third time after t3 to obtain its second position point.
And when the comparison is judged, the expected point and the position point, and the second expected point and the second position point are respectively compared.
In this embodiment, when the difference between the expected point and the position point is greater than the preset distance threshold, and the difference between the second expected point and the second position point is greater than the preset distance threshold, the two conditions are satisfied simultaneously, the target object is considered to move irregularly on the travel track, and thus the reminding signal is triggered.
Likewise, in the present embodiment, t1 and t2 are both 20s, and t3 is preferably 20 s. In other preferred embodiments, t1, t2 and t3 may be equal or different, and the specific time may be 10s, 20s or 1 min. As a more preferable embodiment, when the time lengths of t1, t2 and t3 are all greater than 10s, the moving speed and direction of the object can be better judged, and an error formed in a short time is avoided, so that the monitoring and calculating effects are improved. Preferably, the object moves in a linear manner within the walking area.
Similarly, in the present embodiment, v1 may be calculated using the actual moving speed of the target object or the moving speed in the video, as long as it is unified with the subsequent calculation unit. Specifically, the distance between the actual image positioning device and the target object can be selected so as to perform better calculation. In contrast, the preset distance threshold may be measured by an actual distance (e.g., 3m, 5m, etc.), or may be measured by a distance between a desired point and a position point on the image (e.g., 3cm, 5cm, etc.).
The rest of the preferred embodiments of this embodiment refer to the above embodiment 1, and are not described herein again.
Example 3
This embodiment describes another preferred embodiment of the intelligent monitoring system based on visual distance. Compared with the above embodiment, the present embodiment is characterized in that:
in this embodiment, the image positioning device is provided with a monitoring image; referring to fig. 3(a), after the reference point is obtained, the reference point is placed in the center point of the monitoring image. After the position point is obtained through t2, please refer to fig. 3(b), the position point is also placed in the monitoring image; and comparing the difference between the central point and the position point.
In this embodiment, the comparison and determination of the position and distance can be realized by comparing each point in the image. The image positioning device can generate a monitoring image after monitoring, and simulate the target object as a reference point to be formed on the monitoring image, and preferably form the reference point on the central point of the monitoring image, so that the length and the width of the monitoring image can be utilized to the maximum extent, and the defect that the subsequent position points are drawn and cannot be directly compared with the points on the image is avoided.
Then, after the position point is obtained at t2, the position point is also placed in the monitoring image, the difference between the central point and the position point is compared, and the central point is the desired point at the same time, so that the comparison between the desired point and the position point is realized. Through the technical scheme, comparison and judgment can be directly carried out on the image, so that the method is more visual on one hand and is simpler and more convenient on the other hand.
The other preferred embodiments of this embodiment refer to the above embodiments, and are not described herein again.
Example 4
The present embodiment describes some preferred embodiments of other aspects of the intelligent monitoring system based on visual distance. Compared with the above embodiment, the present embodiment is characterized in that:
the object moves in a line-like manner within the walking area.
In this embodiment, when the walking area is to be set as a straight-line-like area, the target object can move in a straight line manner in the walking area, so that the monitoring and the judgment of the monitoring system can be facilitated, and the reliability of the monitoring result is improved.
The other preferred embodiments of this embodiment refer to the above embodiments, and are not described herein again.
Example 5
The present embodiment describes some preferred embodiments of other aspects of the intelligent monitoring system based on visual distance. Compared with the above embodiment, the present embodiment is characterized in that:
the intelligent monitoring system also comprises at least two gravity sensing devices, and the gravity sensing devices are arranged on the walking area; the gravity sensing device performs the following steps:
and measuring the gravity of the target object passing through the same or different gravity sensing equipment in unit time, obtaining a difference value delta g of the gravity, judging the delta g, and triggering a reminding signal if the delta g is smaller than a preset gravity threshold value.
In some cases, it may happen that safety personnel familiar with the environment do not move at a certain speed within the walking area, for example cleaning workers. To avoid false triggering of the alert signal to such personnel. In this embodiment, a gravity sensing device is added to the monitoring device to solve this problem.
The technical scheme is solved by utilizing the characteristic that the gravity of the cleaning operators can change during operation. When working, cleaning personnel usually carry some equipment on their back, and the weight of the cleaning agent on their body is consumed by spraying the cleaning agent onto the ground. Or the burden of gravity is increased when the ground garbage is cleaned. I.e., it changes under its own weight in a situation similar to the operation of these two cleaning persons. And at least two gravity sensing devices are arranged in the walking area, so that the gravity of the personnel can be measured in real time. The reason for having two at least gravity-sensing devices is that can measure the gravity of the same person passing through different gravity-sensing devices simultaneously in a period of time, also can measure the gravity of the same person passing through the same gravity-sensing device repeatedly in a period of time. After measurement, obtaining a difference value delta g of gravity, judging the delta g, and triggering a reminding signal if the delta g is smaller than a preset threshold value of the gravity.
For example, the initial gravity of the worker who performs the spraying operation is 800N, the gravity of the worker is 800N measured by the first gravity sensing device, if the worker starts the spraying operation, the self load is reduced, the gravity measured when the worker passes the second gravity sensing device is 754N, Δ g is calculated to be 46N, and if the preset gravity threshold is set to be 5N, the threshold is greater than the preset gravity threshold, and the reminding signal is not triggered. Furthermore, the reminding signal can be triggered to be stopped, namely the reminding signal generated by distance identification is stopped.
With reference to the foregoing embodiment, in another aspect, when the gravity sensing device measures the gravity of the target object and a continuous gravity value occurs, the maximum gravity value of the target object passing through the gravity sensing device is taken as a basis for calculating the difference Δ g of the gravity. When the gravity sensing device is used for measuring the gravity, the situation that two feet cannot be simultaneously arranged on the gravity sensing device may occur, and when the situation occurs, the gravity sensing device can judge that if the gravity continuously occurs, the maximum gravity value of the target object passing through the gravity sensing device is used as the basis for calculating the difference value delta g of the gravity.
In a specific embodiment, the at least two gravity sensing devices should be laid on the walking area and along the walking track, so that the gravity of the object can be better measured.
The other preferred embodiments of this embodiment refer to the above embodiments, and are not described herein again.
Example 6
The present embodiment describes some preferred embodiments of other aspects of the intelligent monitoring system based on visual distance. Compared with the above embodiment, the present embodiment is characterized in that:
the intelligent monitoring system also comprises a face recognition device and a background database;
the face recognition equipment is used for recognizing the face image of the target object, comparing the face image with a safe face in a background database, and triggering a stopping reminding signal if the face image is judged to be safe.
In this embodiment, in order to improve the accuracy of the above-mentioned visual distance monitoring technical scheme and prevent the false triggering of the alert signal to the target object, a face recognition device is still added in the preferred embodiment, so that the effective operation of the above-mentioned visual distance monitoring technical scheme can be ensured through multi-party monitoring confirmation, and the effectiveness and the completeness of the monitoring thereof are improved.
The other preferred embodiments of this embodiment refer to the above embodiments, and are not described herein again.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (8)
1. An intelligent monitoring system based on visual distance is characterized by comprising the following devices:
a target object monitoring device for monitoring a target object existing in the walking area;
the image positioning device is used for positioning the target object after the target object monitoring device identifies the target object;
the distance recognition device is used for taking the target object positioning as a reference point, measuring and calculating to form a desired point according to the moving speed and the moving direction of the target object within a period of time, comparing the desired point with a position point where the target object is actually located within another period of time, and triggering a reminding signal if the difference between the desired point and the position point is greater than a preset distance threshold;
the distance recognition device and the image positioning device specifically execute the following steps:
after the datum point is obtained, the distance identification device continuously positions the datum point within the time t1, and records the moving speed v1 of the datum point within the time t1 and the moving direction d1 of the datum point; calculating the position of the reference point, namely a desired point after t2 time passes according to the v1 and the d 1;
the image positioning device moves within t2 at a moving speed v1 and a moving direction d1, and after t2, the target object is secondarily positioned to obtain a position point;
the distance identification equipment continues to locate the reference point within the time t2 at the same time, and records the moving speed v1 'of the reference point within the time t2 and the moving direction d 1' of the reference point; correcting according to the v1, d1, v1 'and d 1' to obtain a moving speed v2 and a moving direction d2 of the reference point in the total time of t1 and t2, and calculating a second expected point which is the position of the reference point after t3 time;
the image positioning device moves within t3 at a moving speed v2 and a moving direction d2, and after t3 is passed, the target object is positioned three times to obtain a second position point;
and comparing the second expected point with the second position point, and triggering a reminding signal if the difference between the expected point and the position point and the difference between the second expected point and the second position point are both greater than a preset distance threshold.
2. The intelligent visual distance-based monitoring system of claim 1 wherein the image-locating device is provided with a monitoring image; after the reference point is obtained, the reference point is placed in the central point of the monitoring image, and after a position point is obtained through t2, the position point is also placed in the monitoring image; and comparing the difference between the central point and the position point.
3. The intelligent visual distance-based monitoring system of claim 2, wherein t1 is equal in time length to t 2.
4. The intelligent visual distance-based monitoring system of claim 3 wherein the time lengths of t1, t2, and t3 are each greater than 10 s.
5. The intelligent visual distance-based monitoring system of claim 1 wherein the target moves in a line-like manner within the walking area.
6. The intelligent visual distance-based monitoring system of claim 1, further comprising at least two gravity sensing devices, said gravity sensing devices being layered on said walking area; the gravity sensing device performs the following steps:
measuring the gravity of the target object passing through the same or different gravity sensing equipment in unit time, obtaining a difference value delta g of the gravity, judging the delta g, and triggering a reminding signal if the delta g is smaller than a preset gravity threshold; or if the Δ g is larger than the preset threshold value of gravity, triggering a stop reminding signal.
7. The intelligent visual distance-based monitoring system according to claim 6, wherein when the gravity sensing device measures the gravity of the object and a continuous gravity value occurs, the maximum gravity value of the object passing through the gravity sensing device is taken as a basis for calculating the difference Δ g between the gravity.
8. The intelligent visual distance-based monitoring system of claim 1, further comprising a face recognition device and a background database;
the face recognition equipment is used for recognizing the face image of the target object, comparing the face image with a safe face in a background database, and triggering a stopping reminding signal if the face image is judged to be safe.
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