阅读说明：本技术 稀疏人群位置现场定位系统及方法 (Sparse crowd position field positioning system and method ) 是由 不公告发明人 于 2021-08-21 设计创作，主要内容包括：本发明涉及一种稀疏人群位置现场定位系统,包括：定向虚化机构,用于对接收到的每一帧馆内监控画面执行定向虚化操作,以获得并输出对应的定向虚化画面；空间滤波机构,用于对接收到的定向虚化画面执行平滑空间滤波操作,以获得对应的空间滤波画面；色阶调整机构,用于对接收到空间滤波画面执行应用空域微分模式的图像信号锐化操作,以获得对应的色阶调整画面。本发明还涉及一种稀疏人群位置现场定位方法。通过本发明,能够执行对游泳池水面的各个游玩区域内的人员分布密度的即时辨识操作,并实时向人员分布密度最少的空闲游玩区域进行现场投影,从而使得游泳池水面人群分布均匀。(The invention relates to a sparse crowd position field positioning system, which comprises: the directional blurring mechanism is used for executing directional blurring operation on each received monitoring picture in the museum so as to obtain and output a corresponding directional blurring picture; a spatial filtering mechanism for performing a smooth spatial filtering operation on the received directional blurred picture to obtain a corresponding spatial filtering picture; and the color level adjusting mechanism is used for executing image signal sharpening operation applying a spatial differential mode on the received spatial filtering picture so as to obtain a corresponding color level adjusting picture. The invention also relates to a sparse crowd position field positioning method. By the method and the device, the personnel distribution density in each playing area on the water surface of the swimming pool can be identified in real time, and the field projection is carried out on the idle playing area with the minimum personnel distribution density in real time, so that the population distribution on the water surface of the swimming pool is uniform.)

1. A sparse population location site locating system, the system comprising:

the directional blurring mechanism is connected with the pool body detection mechanism and is used for executing directional blurring operation on each received frame of in-hall monitoring picture so as to obtain and output a corresponding directional blurring picture;

the spatial filtering mechanism is connected with the directional blurring mechanism and is used for executing smooth spatial filtering operation on the received directional blurring picture to obtain a corresponding spatial filtering picture;

the color level adjusting mechanism is connected with the spatial filtering mechanism and is used for carrying out image signal sharpening operation applying a spatial domain differential mode on a received spatial filtering picture so as to obtain a corresponding color level adjusting picture;

the pixel resolution part is connected with the color gradation adjusting mechanism and is used for identifying each pixel point forming the water surface in the color gradation adjusting picture, and taking the maximum imaging area surrounded by each pixel point forming the water surface in the color gradation adjusting picture as a target identification area;

the area dividing component is connected with the pixel distinguishing component and is used for dividing the target identification area into a plurality of divided sub-areas which are uniformly distributed;

a head acquisition component connected with the region dividing component and used for executing the following actions on each segmentation subarea: recognizing the number of human head objects in the segmentation sub-regions as a real-time recognition number;

real-time operation means, provided in the vicinity of the pool body detection mechanism, for taking the partitioned sub-area with the smallest real-time recognition number among the plurality of partitioned sub-areas as a reference sub-area, and performing an instant projection action on a solid area corresponding to the reference sub-area on a swimming pool water surface of the natatorium based on a relative position of the reference sub-area in the target recognition area;

the amplitude comparison mechanism is arranged at the top of the natatorium and used for sensing a field audio signal of the natatorium and sending out a first detection signal when the maximum amplitude of an underwater sound component existing in the field audio signal is detected to be out of limit;

the pool body detection mechanism is arranged near the amplitude comparison mechanism, is connected with the amplitude comparison mechanism, and is used for realizing video monitoring on the water surface of the swimming pool of the natatorium when receiving the first detection signal so as to obtain each frame of in-pool monitoring pictures at uniform time intervals;

the amplitude comparison mechanism is further used for sending a second detection signal when the maximum amplitude of the underwater sound component existing in the field audio signal is detected not to exceed the limit;

wherein the directional blurring mechanism, the spatial filtering mechanism, the tone scale adjusting mechanism, the pixel resolution part, and the region dividing part are all disposed in a control room of a natatorium;

and the pool body detection mechanism is also used for stopping realizing the video monitoring of the water surface of the swimming pool of the natatorium when receiving the second detection signal.

2. The sparse population position in-situ location system of claim 1, further comprising:

and the humidity measurement array comprises a plurality of humidity measurement elements which are respectively connected with the directional blurring mechanism, the spatial filtering mechanism, the color level adjusting mechanism, the pixel resolution component and the area dividing component.

3. The sparse population position in-situ location system of claim 2, wherein:

the humidity measuring elements are used for respectively measuring the current internal humidity of the directional blurring mechanism, the spatial filtering mechanism, the color level adjusting mechanism, the pixel distinguishing component and the area dividing component.

4. The sparse population position in-situ location system of claim 3, wherein the system comprises:

and the field alarm mechanism is respectively connected with the humidity measuring elements and is used for executing humidity warning operation corresponding to the equipment with the over-humidity limit when the equipment with the over-humidity limit exists in the current internal temperature of the directional blurring mechanism, the spatial filtering mechanism, the color level adjusting mechanism, the pixel distinguishing component and the area dividing component.

5. The sparse population position in-situ location system of claim 1, wherein:

the directional blurring mechanism, the spatial filtering mechanism, the color level adjusting mechanism, the pixel resolution part and the region division part are distributed by adopting different CPLD devices.

6. A sparse population location field locating method, the method comprising:

the directional blurring mechanism is connected with the pool body detection mechanism and used for executing directional blurring operation on each received frame of in-hall monitoring picture to obtain and output a corresponding directional blurring picture;

using a spatial filtering mechanism connected with the directional blurring mechanism for performing a smooth spatial filtering operation on the received directional blurring picture to obtain a corresponding spatial filtering picture;

the color level adjusting mechanism is connected with the spatial filtering mechanism and is used for carrying out image signal sharpening operation applying a spatial domain differential mode on a received spatial filtering picture so as to obtain a corresponding color level adjusting picture;

a pixel resolution part is used and connected with the color level adjusting mechanism and used for identifying each pixel point forming the water surface in the color level adjusting picture, and a maximum imaging area surrounded by each pixel point forming the water surface in the color level adjusting picture is used as a target identification area;

a region dividing section connected to the pixel resolution section, for dividing the target recognition region into a plurality of divided sub-regions which are uniformly distributed;

using a head acquisition component, connected to the region partitioning component, for performing the following actions for each of the segmented sub-regions: recognizing the number of human head objects in the segmentation sub-regions as a real-time recognition number;

using real-time operation means, arranged near the pool body detection mechanism, for taking the partitioned sub-area with the minimum real-time recognition number in the plurality of partitioned sub-areas as a reference sub-area, and performing an instant projection action on a corresponding entity area of the reference sub-area on a swimming pool water surface of the swimming pool based on the relative position of the reference sub-area in the target recognition area;

the method comprises the steps that an amplitude comparison mechanism is arranged at the top of a natatorium and used for sensing a field audio signal of the natatorium and sending a first detection signal when the maximum amplitude of a hydroacoustic component existing in the field audio signal is detected to be out of limit;

a pool body detection mechanism is used, is arranged near the amplitude comparison mechanism, is connected with the amplitude comparison mechanism and is used for realizing video monitoring on the water surface of the swimming pool of the natatorium when receiving the first detection signal so as to obtain each frame of in-pool monitoring pictures at uniform time intervals;

the amplitude comparison mechanism is further used for sending a second detection signal when the maximum amplitude of the underwater sound component existing in the field audio signal is detected not to exceed the limit;

wherein the directional blurring mechanism, the spatial filtering mechanism, the tone scale adjusting mechanism, the pixel resolution part, and the region dividing part are all disposed in a control room of a natatorium;

and the pool body detection mechanism is also used for stopping realizing the video monitoring of the water surface of the swimming pool of the natatorium when receiving the second detection signal.

7. The sparse population location site locating method of claim 6, further comprising:

the humidity measurement array comprises a plurality of humidity measurement elements which are respectively connected with the directional blurring mechanism, the spatial filtering mechanism, the color gradation adjusting mechanism, the pixel resolution component and the area dividing component.

8. The sparse population location site locating method of claim 7, wherein:

the humidity measuring elements are used for respectively measuring the current internal humidity of the directional blurring mechanism, the spatial filtering mechanism, the color level adjusting mechanism, the pixel distinguishing component and the area dividing component.

9. The sparse population location site locating method of claim 8, wherein the method comprises:

and the on-site alarm mechanism is respectively connected with the humidity measuring elements and is used for executing humidity warning operation corresponding to the equipment with the over-humidity limit when the equipment with the over-humidity limit exists in the current internal temperature of the directional blurring mechanism, the spatial filtering mechanism, the color level adjusting mechanism, the pixel distinguishing component and the area dividing component.

10. The sparse population location site locating method of claim 6, wherein:

the directional blurring mechanism, the spatial filtering mechanism, the color level adjusting mechanism, the pixel resolution part and the region division part are distributed by adopting different CPLD devices.

Technical Field

The invention relates to the field of data analysis, in particular to a sparse crowd position field positioning system and a sparse crowd position field positioning method.

Background

The data analysis refers to analyzing a large amount of collected data by using a proper statistical and analytical method, summarizing, understanding and digesting the data so as to maximally develop the function of the data and play the role of the data. Data analysis is the process of studying and summarizing data in detail to extract useful information and to form conclusions.

The data is also referred to as observation values and is the result of experiments, measurements, observations, investigations, and the like. The data processed in the data analysis is divided into qualitative data and quantitative data. Data that fall into only one category and cannot be measured numerically is called qualitative data. The qualitative data is represented as category, but is not sequential, and is classified data, such as gender, brand, and the like; the qualitative data is represented as categories, but is sorted sequentially, and is sequencing data such as academic calendar, quality grade of goods, and the like. At present, when a large number of players exist in a swimming pool, the vacant area on the water surface of the swimming pool is a target for each new player to care and search, however, the people in the swimming pool are distributed densely and dynamically, the most vacant water surface area is difficult to distinguish by naked eyes in time, the guiding of the players in the swimming pool is not good, and the utilization of water surface resources cannot be maximized.

Disclosure of Invention

In order to solve the technical problems in the prior art, the invention provides a sparse crowd position on-site positioning system and a sparse crowd position on-site positioning method, which can adopt a video monitoring mechanism and a video searching mechanism to complete the instant identification operation of the personnel distribution density in each playing area of the water surface of a swimming pool in a natatorium, and carry out on-site projection on the idle playing area with the minimum personnel distribution density in real time, thereby completing the automatic guidance of the playing personnel.

Compared with the prior art, the invention has at least the following two prominent substantive characteristics:

(1) the method comprises the steps that a directional blurring mechanism, a spatial filtering mechanism, a color gradation adjusting mechanism, a pixel distinguishing component and an area dividing component are introduced, and the directional blurring mechanism, the spatial filtering mechanism, the color gradation adjusting mechanism, the pixel distinguishing component and the area dividing component are used for carrying out targeted video monitoring and video analysis on the water surface of a swimming pool of a natatorium to obtain the number of players in each water surface area and project the number of players to more than one water surface area with the minimum number of players in real time to improve the guiding effectiveness of the natatorium staff;

(2) video monitoring of the pool water surface of the natatorium is triggered only when there is an out-of-range underwater sound component in the natatorium's live audio signal to reduce the occurrence of excessive ineffective action.

According to an aspect of the present invention, there is provided a sparse population location site locating system, the system comprising:

the directional blurring mechanism is connected with the pool body detection mechanism and is used for executing directional blurring operation on each received frame of in-hall monitoring picture so as to obtain and output a corresponding directional blurring picture;

the spatial filtering mechanism is connected with the directional blurring mechanism and is used for executing smooth spatial filtering operation on the received directional blurring picture to obtain a corresponding spatial filtering picture;

the color level adjusting mechanism is connected with the spatial filtering mechanism and is used for carrying out image signal sharpening operation applying a spatial domain differential mode on a received spatial filtering picture so as to obtain a corresponding color level adjusting picture;

the pixel resolution part is connected with the color gradation adjusting mechanism and is used for identifying each pixel point forming the water surface in the color gradation adjusting picture, and taking the maximum imaging area surrounded by each pixel point forming the water surface in the color gradation adjusting picture as a target identification area;

the area dividing component is connected with the pixel distinguishing component and is used for dividing the target identification area into a plurality of divided sub-areas which are uniformly distributed;

a head acquisition component connected with the region dividing component and used for executing the following actions on each segmentation subarea: recognizing the number of human head objects in the segmentation sub-regions as a real-time recognition number;

real-time operation means, provided in the vicinity of the pool body detection mechanism, for taking the partitioned sub-area with the smallest real-time recognition number among the plurality of partitioned sub-areas as a reference sub-area, and performing an instant projection action on a solid area corresponding to the reference sub-area on a swimming pool water surface of the natatorium based on a relative position of the reference sub-area in the target recognition area;

the amplitude comparison mechanism is arranged at the top of the natatorium and used for sensing a field audio signal of the natatorium and sending out a first detection signal when the maximum amplitude of an underwater sound component existing in the field audio signal is detected to be out of limit;

the pool body detection mechanism is arranged near the amplitude comparison mechanism, is connected with the amplitude comparison mechanism, and is used for realizing video monitoring on the water surface of the swimming pool of the natatorium when receiving the first detection signal so as to obtain each frame of in-pool monitoring pictures at uniform time intervals;

the amplitude comparison mechanism is further used for sending a second detection signal when the maximum amplitude of the underwater sound component existing in the field audio signal is detected not to exceed the limit;

wherein the directional blurring mechanism, the spatial filtering mechanism, the tone scale adjusting mechanism, the pixel resolution part, and the region dividing part are all disposed in a control room of a natatorium;

and the pool body detection mechanism is also used for stopping realizing the video monitoring of the water surface of the swimming pool of the natatorium when receiving the second detection signal.

According to another aspect of the present invention, there is also provided a sparse population position field positioning method, the method including:

the directional blurring mechanism is connected with the pool body detection mechanism and used for executing directional blurring operation on each received frame of in-hall monitoring picture to obtain and output a corresponding directional blurring picture;

using a spatial filtering mechanism connected with the directional blurring mechanism for performing a smooth spatial filtering operation on the received directional blurring picture to obtain a corresponding spatial filtering picture;

the color level adjusting mechanism is connected with the spatial filtering mechanism and is used for carrying out image signal sharpening operation applying a spatial domain differential mode on a received spatial filtering picture so as to obtain a corresponding color level adjusting picture;

a pixel resolution part is used and connected with the color level adjusting mechanism and used for identifying each pixel point forming the water surface in the color level adjusting picture, and a maximum imaging area surrounded by each pixel point forming the water surface in the color level adjusting picture is used as a target identification area;

a region dividing section connected to the pixel resolution section, for dividing the target recognition region into a plurality of divided sub-regions which are uniformly distributed;

using a head acquisition component, connected to the region partitioning component, for performing the following actions for each of the segmented sub-regions: recognizing the number of human head objects in the segmentation sub-regions as a real-time recognition number;

using real-time operation means, arranged near the pool body detection mechanism, for taking the partitioned sub-area with the minimum real-time recognition number in the plurality of partitioned sub-areas as a reference sub-area, and performing an instant projection action on a corresponding entity area of the reference sub-area on a swimming pool water surface of the swimming pool based on the relative position of the reference sub-area in the target recognition area;

the method comprises the steps that an amplitude comparison mechanism is arranged at the top of a natatorium and used for sensing a field audio signal of the natatorium and sending a first detection signal when the maximum amplitude of a hydroacoustic component existing in the field audio signal is detected to be out of limit;

a pool body detection mechanism is used, is arranged near the amplitude comparison mechanism, is connected with the amplitude comparison mechanism and is used for realizing video monitoring on the water surface of the swimming pool of the natatorium when receiving the first detection signal so as to obtain each frame of in-pool monitoring pictures at uniform time intervals;

the amplitude comparison mechanism is further used for sending a second detection signal when the maximum amplitude of the underwater sound component existing in the field audio signal is detected not to exceed the limit;

wherein the directional blurring mechanism, the spatial filtering mechanism, the tone scale adjusting mechanism, the pixel resolution part, and the region dividing part are all disposed in a control room of a natatorium;

and the pool body detection mechanism is also used for stopping realizing the video monitoring of the water surface of the swimming pool of the natatorium when receiving the second detection signal.

Detailed Description

The following will describe in detail an embodiment of the sparse population location site locating method of the present invention.

The purpose of data analysis is to concentrate and extract information hidden in a large collection of seemingly chaotic data, so as to find out the intrinsic laws of the studied objects. In practical applications, data analysis may help people make decisions in order to take appropriate actions. Data analysis is a process of organizing and purposefully collecting data and analyzing the data to make it information. This process is a support process for quality management architectures. Data analysis processes need to be applied appropriately throughout the life cycle of the product, including various processes from market research to after-market service and final disposal, to promote effectiveness. For example, a designer analyzes the obtained data to determine a design direction through extensive design investigation before starting a new design, and thus data analysis is extremely important in industrial design.

At present, when a large number of players exist in a swimming pool, the vacant area on the water surface of the swimming pool is a target for each new player to care and search, however, the people in the swimming pool are distributed densely and dynamically, the most vacant water surface area is difficult to distinguish by naked eyes in time, the guiding of the players in the swimming pool is not good, and the utilization of water surface resources cannot be maximized.

In order to overcome the defects, the invention builds a sparse crowd position field positioning system and a sparse crowd position field positioning method, and can effectively solve the corresponding technical problems.

The sparse crowd position field positioning system shown according to the embodiment of the invention comprises:

the directional blurring mechanism is connected with the pool body detection mechanism and is used for executing directional blurring operation on each received frame of in-hall monitoring picture so as to obtain and output a corresponding directional blurring picture;

the spatial filtering mechanism is connected with the directional blurring mechanism and is used for executing smooth spatial filtering operation on the received directional blurring picture to obtain a corresponding spatial filtering picture;

the color level adjusting mechanism is connected with the spatial filtering mechanism and is used for carrying out image signal sharpening operation applying a spatial domain differential mode on a received spatial filtering picture so as to obtain a corresponding color level adjusting picture;

the pixel resolution part is connected with the color gradation adjusting mechanism and is used for identifying each pixel point forming the water surface in the color gradation adjusting picture, and taking the maximum imaging area surrounded by each pixel point forming the water surface in the color gradation adjusting picture as a target identification area;

the area dividing component is connected with the pixel distinguishing component and is used for dividing the target identification area into a plurality of divided sub-areas which are uniformly distributed;

a head acquisition component connected with the region dividing component and used for executing the following actions on each segmentation subarea: recognizing the number of human head objects in the segmentation sub-regions as a real-time recognition number;

real-time operation means, provided in the vicinity of the pool body detection mechanism, for taking the partitioned sub-area with the smallest real-time recognition number among the plurality of partitioned sub-areas as a reference sub-area, and performing an instant projection action on a solid area corresponding to the reference sub-area on a swimming pool water surface of the natatorium based on a relative position of the reference sub-area in the target recognition area;

the amplitude comparison mechanism is arranged at the top of the natatorium and used for sensing a field audio signal of the natatorium and sending out a first detection signal when the maximum amplitude of an underwater sound component existing in the field audio signal is detected to be out of limit;

the pool body detection mechanism is arranged near the amplitude comparison mechanism, is connected with the amplitude comparison mechanism, and is used for realizing video monitoring on the water surface of the swimming pool of the natatorium when receiving the first detection signal so as to obtain each frame of in-pool monitoring pictures at uniform time intervals;

the amplitude comparison mechanism is further used for sending a second detection signal when the maximum amplitude of the underwater sound component existing in the field audio signal is detected not to exceed the limit;

wherein the directional blurring mechanism, the spatial filtering mechanism, the tone scale adjusting mechanism, the pixel resolution part, and the region dividing part are all disposed in a control room of a natatorium;

and the pool body detection mechanism is also used for stopping realizing the video monitoring of the water surface of the swimming pool of the natatorium when receiving the second detection signal.

Next, a detailed structure of the sparse population position on-site positioning system of the present invention will be further described.

The sparse population position field positioning system further comprises:

and the humidity measurement array comprises a plurality of humidity measurement elements which are respectively connected with the directional blurring mechanism, the spatial filtering mechanism, the color level adjusting mechanism, the pixel resolution component and the area dividing component.

In the sparse population location site location system:

the humidity measuring elements are used for respectively measuring the current internal humidity of the directional blurring mechanism, the spatial filtering mechanism, the color level adjusting mechanism, the pixel distinguishing component and the area dividing component.

The sparse population position field positioning system further comprises:

and the field alarm mechanism is respectively connected with the humidity measuring elements and is used for executing humidity warning operation corresponding to the equipment with the over-humidity limit when the equipment with the over-humidity limit exists in the current internal temperature of the directional blurring mechanism, the spatial filtering mechanism, the color level adjusting mechanism, the pixel distinguishing component and the area dividing component.

In the sparse population location site location system:

the directional blurring mechanism, the spatial filtering mechanism, the color level adjusting mechanism, the pixel resolution part and the region division part are distributed by adopting different CPLD devices.

The sparse crowd position field positioning method shown according to the embodiment of the invention comprises the following steps:

the directional blurring mechanism is connected with the pool body detection mechanism and used for executing directional blurring operation on each received frame of in-hall monitoring picture to obtain and output a corresponding directional blurring picture;

using a spatial filtering mechanism connected with the directional blurring mechanism for performing a smooth spatial filtering operation on the received directional blurring picture to obtain a corresponding spatial filtering picture;

the color level adjusting mechanism is connected with the spatial filtering mechanism and is used for carrying out image signal sharpening operation applying a spatial domain differential mode on a received spatial filtering picture so as to obtain a corresponding color level adjusting picture;

a pixel resolution part is used and connected with the color level adjusting mechanism and used for identifying each pixel point forming the water surface in the color level adjusting picture, and a maximum imaging area surrounded by each pixel point forming the water surface in the color level adjusting picture is used as a target identification area;

a region dividing section connected to the pixel resolution section, for dividing the target recognition region into a plurality of divided sub-regions which are uniformly distributed;

using a head acquisition component, connected to the region partitioning component, for performing the following actions for each of the segmented sub-regions: recognizing the number of human head objects in the segmentation sub-regions as a real-time recognition number;

using real-time operation means, arranged near the pool body detection mechanism, for taking the partitioned sub-area with the minimum real-time recognition number in the plurality of partitioned sub-areas as a reference sub-area, and performing an instant projection action on a corresponding entity area of the reference sub-area on a swimming pool water surface of the swimming pool based on the relative position of the reference sub-area in the target recognition area;

the method comprises the steps that an amplitude comparison mechanism is arranged at the top of a natatorium and used for sensing a field audio signal of the natatorium and sending a first detection signal when the maximum amplitude of a hydroacoustic component existing in the field audio signal is detected to be out of limit;

a pool body detection mechanism is used, is arranged near the amplitude comparison mechanism, is connected with the amplitude comparison mechanism and is used for realizing video monitoring on the water surface of the swimming pool of the natatorium when receiving the first detection signal so as to obtain each frame of in-pool monitoring pictures at uniform time intervals;

the amplitude comparison mechanism is further used for sending a second detection signal when the maximum amplitude of the underwater sound component existing in the field audio signal is detected not to exceed the limit;

wherein the directional blurring mechanism, the spatial filtering mechanism, the tone scale adjusting mechanism, the pixel resolution part, and the region dividing part are all disposed in a control room of a natatorium;

and the pool body detection mechanism is also used for stopping realizing the video monitoring of the water surface of the swimming pool of the natatorium when receiving the second detection signal.

Next, the specific steps of the sparse population position on-site positioning method of the present invention will be further described.

The sparse population position field positioning method can further comprise the following steps:

the humidity measurement array comprises a plurality of humidity measurement elements which are respectively connected with the directional blurring mechanism, the spatial filtering mechanism, the color gradation adjusting mechanism, the pixel resolution component and the area dividing component.

In the sparse crowd position on-site positioning method:

the humidity measuring elements are used for respectively measuring the current internal humidity of the directional blurring mechanism, the spatial filtering mechanism, the color level adjusting mechanism, the pixel distinguishing component and the area dividing component.

The sparse population position field positioning method can further comprise the following steps:

and the on-site alarm mechanism is respectively connected with the humidity measuring elements and is used for executing humidity warning operation corresponding to the equipment with the over-humidity limit when the equipment with the over-humidity limit exists in the current internal temperature of the directional blurring mechanism, the spatial filtering mechanism, the color level adjusting mechanism, the pixel distinguishing component and the area dividing component.

In the sparse crowd position on-site positioning method:

the directional blurring mechanism, the spatial filtering mechanism, the color level adjusting mechanism, the pixel resolution part and the region division part are distributed by adopting different CPLD devices.

In addition, in the sparse population position on-site positioning system and method, identifying each pixel point constituting the water surface in the color gradation adjustment picture, and taking a maximum imaging area surrounded by each pixel point constituting the water surface in the color gradation adjustment picture as a target identification area includes: and identifying each pixel point forming the water surface in the color level adjustment picture based on the gray value interval of the water surface, and taking a maximum imaging area surrounded by each pixel point forming the water surface in the color level adjustment picture as a target identification area.

By adopting the sparse crowd position on-site positioning system and the sparse crowd position on-site positioning method, the technical problem that people in a swimming pool cannot guide the people in the prior art when the number of people playing in the swimming pool is large can be solved, the personnel distribution density in each playing area on the water surface of the swimming pool can be identified in real time, and the idle playing area with the minimum personnel distribution density can be projected on site in real time, so that the local water surface area which is too crowded or too sparse is avoided.

In addition, the above-described embodiments are described for easy understanding of the present invention, and the present invention is not limited to the above-described embodiments. On the contrary, the invention is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims, which scope is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures as is permitted under the law.