JPS62107399A - Measurement of number of persons - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a method for measuring the number of people within a set area (1), and another invention relates to a method for measuring the number of people passing through a set area [Prior art] Conventionally, in order to automatically measure the number of people in a limited area, a method such as the one shown in Fig. 4 has been used. ) floor that people can pass through, (2) is floor (1
) and a detector installed at a predetermined height.
l+li 2---. Within the range photographed by the left camera 2), which is a TV camera (hereinafter simply referred to as camera),
The floor surface of the circle is the limited area (1a) (3a)
The first scene photographed by the camera (2) is converted into a first image storage unit stored in Di Zotar information converter (7), (4
'-2; J A second image storage section that can convert and store second images photographed at predetermined time intervals into digital information + (5a) is a first image storage section (3a)
,! : A comparison processing unit that compares the stored information with the second image storage unit (4a) and detects a change in the second image with respect to the first one-plane image, detects the three images together with the changed position, and When the change is of a predetermined magnitude, a signal indicating that the object to be detected is detected is output. (6) is a mask processing unit that receives a signal from the comparison processing unit (5a) and applies a mask of a predetermined size to the area where the detected object is detected.

(8a) is a counting processing unit that measures the number of digits to which a mask is applied;
Processing unit ff that processes the detection signal of detector +21 in (3a) to (6aX8a) above! (8a) is formed. 00
1 is an output device that receives a signal from the processing device (8a) and outputs a processing result.

For example, a display device for visually displaying a display or a pre/representation device is used.αυ is a monitor device for monitoring output device output, and the sixth row is a television receiver or the like.

The device configured in this way processes the scene information of the limited area (1a) detected by the detector (21) in the processing device (8a), displays the processing results on the output device a, and also displays the processing results on the monitor group [ Next, we will explain the operation to be able to monitor with Qll using the flowchart of Fig. 5. Step (511) detects the presence of no people (... The first O1f of the detector (2)
The iJi image information is stored in the first image storage section (3a) as a first detection signal. When the storage of the first detection signal is completed, the second detection signal 13 is detected at predetermined intervals in step 6z.
The limited area (la) is successively detected by the detector (2) in order to obtain the signal f′fr as described later.
The second image information storage unit (stores in step 4, and in step ω corresponds to the first detection signal and the second detection signal 5') for a certain period of time)
Scan to detect changes, detect changes,
When the change exceeds a predetermined threshold value and has a predetermined size, it is determined that the person exists within the limited area C1a-), and in the step example, the threshold 1 is exceeded. Number of changes 2 The number of people in this limited area (La), which is counted and measured by the counting processing unit (8a) as the number of people in the limited area (La), is performed for all the second detection signals nf? : or 9 is checked in step (to), and if there is an unscanned portion, the process returns to step 2 and the remaining portion is scanned. When the processing of the second detection signal is completed, the counting processing unit (8a) U stores the detected number of people.

After processing, a command is issued to erase the second detection signal.

This second detection signal for detecting the limited area (1a) is updated every time the processing is completed.

Therefore, when step (mouse) confirms the end of the scanning process, step (mouse) updates the second detection signal, and this update
The comparison between the second detection signal and the first detection signal is repeated 71, and six people are detected and the number of people to be measured is added.

Note that the action trajectory of a person entering the limited area ((a)) is almost constant (a), but there are also cases where a curved trajectory is drawn as shown in FIG.

[Problem that the invention seeks to solve]

Conventional people measurement is done as described above, so 1
There are problems in that it is impossible to confirm the direction of movement of a person, and that processing time is long because all detection signals are ignored.

This invention was made to solve the above problem.
Measurement of the number of people present in a limited area in a short period of time 2
Another object of the present invention is to obtain a method for measuring the number of people passing through a limited area.

[Means to solve the problem]

The method for measuring the number of people according to the present invention includes setting a first area and a second area on a first detection signal and a second detection signal, respectively, which detect a limited area. A change in the second detection signal with respect to the first detection signal is compared for each of the first and second motion regions, and when there is a change in the first and second motion regions, it is determined that it is a person, and The method of measuring the number of people according to the present invention is designed to determine whether a person has entered or exited a limited area based on the order of changes in the first and second movement areas. The number of people present in a limited area is measured by subtracting 80 people who left the limited area from the number of people. Another invention is to measure the number of people entering and leaving the limited area multiple times at predetermined intervals. The values are cumulatively added, and half of the value obtained by adding the cumulative number of people entering and exiting a predetermined number of times is measured as the number of people who passed through the restricted area. The diagram will be explained.

In Figure 1, (11(La)(21(2a)Q(
1(11)fl This is the same as the conventional one. (3) sets the first image information of the limited area (1a) detected by the detector (2) as a first area and a second area within a predetermined range;
a storage unit that stores the first detection signal; (4) is a storage unit that can store the second image information of the limited area (1a) detected by the detector (2) as the second detection signal;
A first area and a second area similar to the storage unit (3) are set, +51 #'! In the comparison processing unit that compares the at signal stored in each storage unit (31 and (41) with the second signal, this change detection is performed using the first and second signals set for both the first and second signals. If the change exceeds a predetermined threshold value, it is determined that the object is a detected object, the position of the detected object is detected, and a position signal is output.(6 ) is a change detection unit (a mask processing unit that checks the presence or absence of a mask on the detected object detected in 51 and applies a mask of a predetermined size if there is no mask; (7) an upward direction judgment processing unit; In addition to measuring whether the masked object is located in the first area or the second area, the limited area is determined based on the passage of time, that is, the movement order when the second detection signal is updated. (Detected object that invades the area and limited area (
1λ) to detect the moving direction of the detected object. (8
) is a counting processing unit that calculates the number of objects to be detected entering the limited area (La) and the number of objects to be detected leaving the limited area (La) from the number of masks and the moving direction of the detected objects. In this invention, the measured value of each n count is cumulatively added every time the second detection signal is updated. The first detection signal and the second detection signal detected are compared with each other in the first region and second region set respectively, and the change exceeds a predetermined threshold value. Detect objects that cross the area as objects to be detected, mask them, and measure the number of people entering and passing through the limited area based on the number of masks and the direction of movement of the objects.

Next, the operation will be explained. Here, the first and second motion areas detected by the detector (2) and stored in the first and second storage units (31 and (41), respectively) are defined as limited areas as shown in FIG. Let the first region be (tx
t), the second area is set to (La2), and the flowchart shown in FIG. 3 is used. In this flowchart, step 151) i is the operation of the first storage unit (3), step (2) is the operation of the second storage unit (4), step ω is the operation of the comparison process 5 (5), and steps (to) - is the mask processing section (
Steps 6) and 6) show the operations of the direction judgment processing section (7), and steps +611 and (6) respectively show the operations of the counting processing section (8).

In step (51), a scene in which the object to be detected does not exist in the limited area (La) is stored as a first detection signal, and at the beginning of the step, a second inspection signal detected after the tenth detection operation is stored. Then, in step ω, the change in the second detection signal with respect to the second detection signal is compared. A comparison is made between the first and second motion areas to compare the false image of C, and if the changed part exceeds a predetermined value when the image change is detected, the signal is determined to be the detected object, that is, a person. Output. This detected object is detected and the signal is checked to see if it is masked with a predetermined size in the step diagram. If there is no mask, a mask with a predetermined size is applied in step (54a). Mass evening is given. Next, it is checked in step (to) whether the masked object to be detected is located on the side of the first area (Lad) and the second area (La2). All areas (LaL
It is checked in step (to) whether or not the verification of XLa2) has been completed, and if there are any unverified portions, the process returns to step 2 and re-verification is performed.

Here, since the second detection signal is updated at a predetermined time interval, when a detected object is present in both the detection signal at time l and the detection signal at time t2, the second detection signal is updated at a predetermined time interval. When the object to be detected is a person, it generally moves.

Accordingly, the direction of movement of the object to be detected is determined using the step mark. For example, when the masked object moves in the order from the first area (lat) to the second area (La2), a person entering the limited area (1a), a person entering the limited area (1a), From the second area (La2) to the first area (4
al), it is determined that the person is exiting the limited area (La), and the number of people entering at step ω is IN=
IN+1. Number of people who left 0UT= ou”r+ 1
Then, in step ω, it is confirmed that all masks have been verified. Next, in step I, the mask whose measurement has been completed is canceled, and the verification is canceled. According to this number, the number of people existing in the limited area (1a) in one step process (CNrl) = CNT10 number of people entering (IN
) - the number of people exiting and entering (OL]1'), the number of people present in the limited area (la) is measured by the second detection signal processing at a predetermined time of F9r.
) The number of people passing through is measured at the step field, that is, by cumulatively adding up the number of people entering and the number of people leaving in the second detection signal processed at predetermined time intervals, respectively, and the measured values of multiple times. The number of people who have passed 2 times (CNTz) ta from the cumulative addition value for a predetermined number of times, that is, a predetermined time.

and process it.

Here, eight that passes through the limited area (la) is the limited area (
Since the numbers are counted each time entering and exiting La), it is assumed that the number of people entering (IN) is equal to half of the number of people entering and exiting (O trT).

In addition, in the above implementation sequence, the areas for determining entry/exit to the limited area (la) are two areas, ml and the second area, and the shape is such that these areas exist on four sides, but as two opposing sides. can also be expected to operate in the same way as the above-mentioned implementation sequence. Further, it is also possible to configure two or more in the area for determining entry/exit.

Furthermore, an I TV camera was used as a detector.

A device that emits ultrasonic waves or the like and is capable of processing detection signals may also be used.

〔Effect of the invention〕

As described in t below, according to the present invention, a predetermined detected object is detected by comparing the detection signal of it which detected the limited area with the second detection signal, and the first and second rain detection signals are detected. The entrance/exit of the detected object to the limited area is detected based on the order of movement of the detected object in the first and second areas set in The value obtained by subtracting the number of bodies is measured as the number of people present in the limited area. According to another invention, the number of people entering and the number of people exiting measured at predetermined time intervals are first cumulatively added, and the cumulative addition value for a predetermined number of times is the sum of the number of people entering and the number of people exiting. Half of the number of people who passed through the limited area within a predetermined time is measured as (7). Therefore, since the comparison range of the detection signal is reduced, the processing time becomes faster, and the number of people present and the number of people passing through can be measured.

[Brief explanation of drawings]

1 to 3 respectively show one embodiment of the present invention, in which FIG. 1 is a configuration diagram, FIG. 2 is a detection area diagram based on a detection signal, and FIG. 3 is a flowchart showing the operation. Figure 4~
FIG. 6 shows a conventional device, FIG. 4 is a block diagram, FIG. 5 is a flowchart showing the operation, and FIG. 6 is a movement locus diagram of the object to be detected. In the figure, (11) is a limited area, +21f'[: detector, and (9) is a processing device. Agent Masuo Oiwa Figure 1 Figure 2 Figure 3 Figure 4 Figure 6 Figure 6

Claims (2)

[Claims] (1) A first region and a second region are set in the detection signal of a detector that detects a limited region, and a scene in which the object to be detected does not exist in the limited region is set as the first detection signal. 1
A second detection signal obtained by detecting the limited area is compared with the first detection signal after a predetermined time from the detection of the object, and the detected object is detected from a change in the second detection signal with respect to the first detection signal. , when the value of change exceeds a predetermined threshold value, the detected object is determined to be a person, and when the detected position of the detected object changes from the first region to the second region, the above limitation is applied. It is determined that the person is entering the area, and when the detection position changes from the second area to the first area, it is determined that the person is exiting the limited area, and the person is entering the limited area. A method for measuring the number of people, characterized in that the number of people existing in the limited area is determined by subtracting the number of people who left the limited area from the number of people who left the limited area. (2) A first area and a second area are set in the detection signal of a detector that detects a limited area, and a scene in which the detected object does not exist in the limited area is stored as the first detection signal. , a second detection signal obtained by detecting the limited area after a predetermined time interval after the first detection is compared with the first detection signal, and a change in the second detection signal with respect to the first detection signal; The detected object is detected from the area, and when the value of change exceeds a predetermined threshold value, the detected object is determined to be a person, and the detected object is detected at the detection position in the order from the first area to the second area. When the detected object changes, it is determined that the person is entering the limited area, and when the detected position of the detected object changes from the second area to the first area, it is determined that the person is exiting the limited area. The number of people entering and exiting the limited area that is determined to be present is measured at predetermined time intervals, each measurement result is cumulatively added, and the number of people entering and exiting the limited area is cumulatively added by making the number of measurements above a predetermined number of times. A method for measuring the number of people, characterized in that half of the sum of the values is calculated as the number of people who passed through the limited area within a predetermined period of time.