JPS6325783A - Moving object counting device - Google Patents

Abstract

PURPOSE:To simplify the constitution equipment, and also, to easily cope with a change of a moving path, etc., as well, by executing a detection by photographing the moving path by a video camera. CONSTITUTION:A video camera 1 is placed so as to be opposed to a moving path of an object, and a range containing this moving path is photographed. A photographic video signal from the video camera 1 is stored in a RAM 9 by a frame or field unit at every prescribed interval. Also, plural arbitrary points running along the moving path on a screen of the video signal is set by a keyboard 11. A CPU 4 decides a transition of a data of an address of the RAM 9 corresponding to this set point, detects a moving direction of the object, and also, counts number of pieces.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a moving object counting device for measuring the entrance and exit of people to, for example, a given venue.

[Summary of the invention]

The present invention relates to a moving object counting device, and by setting points on both sides photographed by a video camera and counting by determining changes in images of these points, it is possible to carry out desired measurements extremely easily. It has been made possible.

[Conventional technology]

For example, when measuring the number of people entering and exiting a given venue, conventionally, a passage detection device such as a phototube device is installed at the entry/exit entrance of the venue, which serves as a passageway, and the detection signals are counted. is being carried out.

However, in this case, if there is only one entrance/exit, there is not much of a problem, but if there are multiple entrances, equipment must be installed at each, and there is also wiring for power lines, signal lines, etc. becomes extremely complex. In addition, when counting people entering and leaving the venue, two detection devices are installed in parallel for each, and discrimination is made based on the order in which these detection signals are generated, which requires twice as many devices and requires more configuration. It was getting complicated.

[Problem that the invention seeks to solve]

As described above, in the conventional technology, since a detection device is provided for each movement path, there is a problem that the overall configuration including wiring etc. becomes extremely complicated.

[Means for solving problems]

The present invention includes a video camera (11) that is disposed opposite to a moving path of an object and photographs a range including this moving path, and a video camera (1111) that stores captured video signals from the video camera in units of frames or fields at predetermined intervals. @! memory (RAMt9)) and a means (keyboard (11)) for setting a plurality of points along the transition JiII circuit of the photographed video signal on the screen, and the set points Determines the change in data at the address of the image memory corresponding to °ζ, detects the moving direction of the object, and counts the number (CPU (4)
1) This is a moving object counting device designed to do the following.

[Effect]

According to this, since the moving path is photographed and detected by a video camera, the equipment is simple, and the detection points can be set arbitrarily, so that it is possible to respond to changes in the moving path, etc.

〔Example〕

In FIG. 1, (1) is a video camera that is placed opposite to the moving path of an object and photographs an area including this moving path. 2) and is binarized based on a preset level. This binarized signal is supplied to a serial/parallel conversion circuit (3), and the signals sampled at a predetermined internal clock are parallelized by predetermined bits to form image data. This image data is supplied to a data bus (5) of a central processing unit (CPU) (4).

In addition, the captured video signal from the camera (1) is supplied to the synchronization separation circuit (6), and the separated horizontal and vertical synchronization value codes are supplied to the coordinate formation circuit (7) to correspond to the position on the screen. Coordinate data is formed. This coordinate data is supplied to the data bus (5).

Further, the coordinate data supplied to the data bus (5) is input to the CPU (4), a predetermined memory address is formed, and the data is supplied to a random access memory (RAM) +91 via the address bus (8). Then, this specified address is transferred from the conversion circuit (2) to the data bus (
The image data supplied to 5) is written. As a result, image data photographed by the camera (1) is sequentially written into the RAM (91) in units of one field or one frame at intervals of a plurality of predetermined frame periods.

Further, (10) is a read-only memory (ROM) in which operating programs of the CPU (41) and the like are written.

Furthermore, (11) is a keyboard, which is provided with movement keys (lla) in four directions (up, down, left and right), a setting key (llb), and a cancel key (llc).
The operation data from 11) is supplied to the data bus (5) through 10 times (raku12). A cursor signal that moves according to the operation data of the movement key (lla) is formed by the CPU (4), and this cursor signal is written into the area memory (13) via the data bus (5). Further, the coordinate data from the coordinate forming circuit (7) is supplied to the area memory (13), and the read cursor signal is supplied to the mixer (15) through the parallel/serial conversion circuit (14), and the coordinate data from the camera (1) is supplied to the mixer (15) through the parallel/serial conversion circuit (14). The signal is mixed with the captured video signal and supplied to the monitor receiver (16).

As a result, a cursor that can be moved arbitrarily according to the operation of the movement key (lla) is displayed on the screen of the monitor receiver (16), and when this cursor is moved to the desired detection position, the setting key (llb ') is operated, a predetermined detection area centered on the cursor position will be
U (formed in 41), and a signal to block that area is written into the memory (13).The cursor is also moved to the position of the detection area that has already been written, and in this state, the cancel key (llc) is pressed. When one mulberry is produced, the detection area is erased.

Further, when the coordinate data from the coordinate forming circuit ('I) is supplied to the area memory (13), when this coordinate is within the detection area, a signal is supplied to the data bus (5), and the serial/parallel The image data from the conversion circuit (3) and the data at the corresponding address of RAM +91 are transferred to the CP
U (41) is compared to determine a change in the image.

That is, FIG. 2 shows an image taken by the camera (1). In this figure, the inner surface has partition shelves (21a) (2
Three entrance/exit entrances separated by 1b), (21c), and (21d) are shown, and the movement paths for people entering and exiting are indicated by broken lines (22a), (22b) in the figure.
(22c). Therefore, by moving the cursor on this movement path as indicated by a "+" in the figure and operating the setting key (llb), a detection area is set as a circular border in the figure. Then, the detection areas are sequentially set along the movement path as shown in the figure.

Furthermore, the change in mm within this detection area is determined by the CPU (4). That is, FIG. 3 shows a part of the detection area along the above-mentioned arbitrary movement path, where T is the time axis, and the first detection area is
~The third frame is posted. Then, in the first frame, it is determined whether or not there is a change in the image of the detection area between the previous frame 0 (not shown), and in the second frame and the first frame, and in the third frame Changes in the image of the detection area between two frames are determined.

Note that the presence or absence of a change is determined when the matching ratio of each corresponding pixel in the detection area exceeds a set reference value. Then, the detection area where this change occurred is A in the first frame, as shown with diagonal lines in the figure.
Detection area of B in the second frame, detection area of B in the second frame, third
When the detection area of C is reached in a frame, a count is made if there is one movement from A to C. Furthermore, when the order of change is reversed, one movement from C to A is counted. Therefore, for example, if A to C is the direction of entry and C to A is the direction of exit, the number of people entering and the number of people leaving can be counted separately. Note that these counts can be performed independently for each moving path.

Furthermore, (17) is a clock circuit, and this clock circuit (1
7) is supplied to the data bus (5). When a predetermined time is detected in the CPU (41), the data of the cumulative count of the predetermined time up to that point is sent from the data bus (5) to the display device (or printer) via the IOt[! circuit (18). (19), and as shown in the figure, the detection time and the count values of, for example, people entering and leaving the venue up to that point are displayed or printed out.

In this way, the number of people entering and leaving the venue is counted, and according to the above-mentioned device, the configuration can be extremely simple because only a video camera is installed facing the movement path. In addition, detection points can be easily set using the keyboard while viewing both sides of the monitor, making it easy to respond even when the moving path is changed, for example by moving a partition shelf. Even if it is not a straight line or a curved line (or a complex shape), you can easily set it along the movement path.In addition, it is possible to independently detect and count multiple movement paths. You can also do

〔Effect of the invention〕

According to this invention, since detection is performed by photographing the moving path with a video camera, the configuration equipment is simple, and detection points can be set arbitrarily, so it is possible to easily respond to changes in the moving path, etc. Became.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an example of the present invention, and FIGS. 2 and 3 are diagrams for explaining the same. (1) is a video camera, (4) is a CPU, (91 is a random access memory serving as an image memory, and (11) is a keyboard.

Claims (1)

[Scope of Claims] A video camera that is disposed opposite to a moving path of an object and photographs an area including this moving path, and an image that stores the captured video signal from this video camera in frames or fields at predetermined intervals. a memory; and means for setting a plurality of arbitrary points along the movement path on the screen of the captured video signal, and changes in data at addresses in the image memory corresponding to the set points. A moving object counting device that determines the moving direction of the object and counts the number of objects.