JPH0785242A - Counter for moving object by ccd camera - Google Patents

Abstract

PURPOSE:To prevent the generation of miscounting due to the variation of solar light and external light in the case of counting moving objects by means of a CCD camera. CONSTITUTION:A CCD camera part A is set up on the ceiling of an entrance/ exit 1 in an event field, entering/exiting persons 4 to 8 within camera fields 2, 3 are counted as moving objects and the number of persons stayed in the field is displayed on a display part B. Since the magnitude of each movement vector of an individual object is set up as a threshold for the magnitude of an individual movement vector generated in accordance with the movement of the object, the number of moving objects can be accurately counted even when the quantity of solar light is changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can reduce the error coefficient due to fluctuations of sunlight and external light when the coefficient of a moving object is calculated by using a CCD camera. The present invention relates to a moving object counter capable of automating traffic volume surveys.

[0002]

2. Description of the Related Art In recent years, it is said that the society is labor saving and automated, but the number of visitors at event venues, stations, etc. is manually investigated, and even if a counter device is installed, it may malfunction due to malfunction. The coefficient is generated. In addition, the survey of the traffic volume of vehicles on the roadway is conducted manually. Thus labor saving,
Since automation is delayed, loss of real-time performance and higher costs are being produced.

[0003]

However, in the prior art,
In a counter device using a CCD camera, individual objects are cut out by recognizing a brightness level, a shape, and a size of the shape. Therefore, erroneous recognition or an erroneous coefficient occurs due to fluctuations in sunlight or external light.

[0004]

In order to solve the above-mentioned problems, the counter of the moving object by the CCD camera of the present invention moves the individual object with respect to the individual moving vector amount generated according to the moving amount of the object. By setting the moving vector amount for each amount as the threshold value, the number of moving objects in the count area in the CCD camera field of view can be accurately calculated, and misrecognition or erroneousness due to fluctuations in sunlight or external light can occur. The feature is that the coefficient can be eliminated.

[0005]

According to the present invention, the number of people entering and leaving an event venue, a station, etc. is investigated, the amount of traffic on a driveway and a highway is investigated, and in addition, conventional quantity control of fish, etc. in the sea, rivers, etc.
It is possible to automate the quantity survey of animals and birds.

[0006]

Embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that, in this embodiment, the installation of a counter device for investigating the staying status of the visitors at the event site will be described as an example. FIG. 1 relates to a first embodiment of the present invention, (a) is an installation drawing, FIG. 2 is an example of an entrance / exit counting system developed by Precision, and (a) is an entrance counting system configuration. FIG. 6B is an explanatory view of a device for counting the number of people entering and leaving, FIG. 7C is an explanatory view of determining a threshold value for each moving vector amount, and FIG.

The CCD camera unit A is installed on the ceiling of the entrance / exit gate 1 of the event venue, and the entrance / exiters 4, 4
5, 6, 7, and 8 are counted as moving objects and displayed on the display unit B as the number of people staying in the venue. In this case, even if the amount of sunlight changes, by setting the moving vector amount for each moving amount of each object as a threshold for each moving vector amount that occurs according to the moving amount of the object, Accurate coefficient can be obtained by counting the number of.

With respect to the counter for moving objects by the CCD camera, a system for counting the number of people entering and leaving the vehicle, which was prototype-developed by Precision Co., will be described with reference to FIG. 2. The CCD camera unit A built in the camera housing 9 will be described.
Camera VIDs of occupants 4, 5, 6, 7, 8 within the field of view
The EO signal A'is input to the entrance / exit counting device C,
The noise is removed from the output signal stored in the image memory circuit 10 by the smoothing circuit 11. The output signal is output by the movement vector detection circuit 12 as movement vectors 24, 2
5, 26, 27, 28, 29, 30, 31 are detected,
The movement vector selection circuit 13 cancels the movement vectors 29, 30, and 31 which have no relation to the movement direction. The output is output by the moving amount vector summation circuit 14 to the summation D1 of the movement vectors 24 and 25 and the summation D of the movement vector 26.
2. Based on the total sum D3 of the movement vector 27 and the total sum D4 of the movement vector 28, the output and the attendees 4, 5, 6, 7, 8 in the threshold 19 of the threshold table for each movement amount.
Threshold values 20, 21, 22, 23 for each movement vector amount of
Thus, the number of people entering and leaving the circuit 16 is counted, the count output signal C ′ is input to the count display section B, and the number of stayers is displayed.

In the above-mentioned embodiment, the investigation and display of the number of stayers by the entrance / exit counting system at the event site have been described. However, in the modulo of the object passing and moving within the screen of the fixed CCD camera, As a threshold, the movement vector amount for each movement amount of each defined object with respect to the movement vector amount generated according to the movement amount,
With respect to calculating the number of moving objects in the camera field of view,
Of course, the present invention is not limited to the above embodiment.

[0010]

According to the present invention, the coefficient of a moving object can be accurately measured with a minimum amount of light, regardless of the presence or absence of fluctuations in sunlight and external light. It is certain that the camera will be able to count moving objects and the application will be expanded.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a first embodiment of the present invention in which a counter for moving objects using a CCD camera is applied to a device for counting the number of people entering and leaving an event site, which surveys and displays the staying status of people who attend the event site. It is an entrance / exit entrance installation drawing.

FIG. 2 shows an example of an entrance / exit counting system developed by Precision Co., Ltd. (a) is a block diagram of the entrance / exit counting system, (b) is an explanatory diagram of the entrance / exit counting device, and (c). FIG. 7 is an explanatory diagram of threshold value determination for each movement vector amount, and FIG.

[Simple explanation of symbols]

 A. CCD camera section B. Count display C. Entrance / exit counting device 1. Entrance / exit gate 2.3. Camera field of view 4.5.6.7.8 Visitors 9. Camera housing 10. Image memory circuit 11. Smoothing circuit 12. Movement vector detection circuit 13. Movement vector selection circuit 14. Moving amount-based vector summing circuit 15. Moving amount threshold table 16. Entrance / exit count circuit 17. Sum by movement vector 18. Movement vector amount 19. Count threshold for each movement amount 20. 21. Count threshold of visitors 7 and 21. Count threshold for visitors 5 22. 〃 4 〃 23. 〃 6 〃 24. 〃 7 movement vector amount 25. 〃 8 〃 26. Moving vector amount of the visitor 5 27. 〃 4 of 〃 28. 〃 6 〃 A '. Camera VIDEO signal C '. Count output signal D1. Sum of movement vectors 24 and 25 D2. The sum of 〃 26 D3. 〃 Total of 27 D4. 〃 Total of 28 29.30.31. Movement vector independent of movement direction

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Claims (1)

[Claims] 1. A moving vector amount for each moving amount of an object defined with respect to a moving vector amount generated according to the moving amount of the object in the coefficient of the object passing and moving within the screen of a fixed CCD camera. To calculate the number of moving objects on the screen as a threshold.