JPS6055880B2 - object recognition device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention describes the state of existence of thing A and thing B, which is the target value of a control system such as opening and closing of a gate, in a predetermined place where thing A and thing B of another type can coexist. This invention relates to an object recognition device.

In the conventional example of this kind of opening and closing of gates for vehicle traffic such as Safari Park, as shown in FIGS. 1A and 1B, in FIG. The light projector 1 and the light receiver 2 are arranged so that the light is received by
When an object exists between the emitter 1 and the receiver 2, the light emitted from the emitter 1 is blocked by the object, and as a result, the receiver 2 does not sense the light for a period of time, so the signal causes the light to be detected by the object. It was a recognition device that recognized the presence and opened the mobile gate 4.

However, in this method, regardless of whether it is a car 6 or an animal 7, if the object has a predetermined size, the light is blocked, and therefore the recognition device is extremely dangerous because it opens the moving gate 4. In addition, in FIG. 1B, the object recognition device and a ring-shaped conducting wire 17 are arranged, and changes in the inductance of the conducting wire 17 are also monitored in parallel with the above method. Since the inductance changes, it is possible to reliably recognize whether the object is a single car 6 or an animal 7, so the moving gate 4 can be opened and closed normally, but when both the car 6 and the animal 7 are present within a predetermined location. In this case, since the automobile 6, which is a metal object, was present, the moving gate 4 was opened and the animal 7 passed through with it, making it a very dangerous recognition device. The present invention has been made in view of the above points, and includes a camera provided above a predetermined location where an object A and another object B can coexist, an image analysis device connected to the camera, and an image analysis device connected to the camera. A plurality of discrimination marks that substantially define the outline of the object A are provided on the object A, and the state of existence of the object A within the predetermined location is recognized by the image approximately defined by the discrimination marks by the image analysis device. The object of the present invention is to provide an object recognition device that eliminates the conventional drawbacks.

An embodiment of the present invention will be described below with reference to FIGS. 2A, B), 3, and 4.

In the figure, 1 is a light projector that generates light, 2 is a light receiver that receives the light, 3 is a fixed gate, 4 is a movable gate that can be opened and closed,
5 is a camera placed above a predetermined location in front of the gate, 6
is a car, 7 is an animal, and 8 is a discrimination mark that is attached only to the car 6, and is provided at the four corners so as to roughly define the ring of the car 6. Reference numeral 9 denotes an upper sheet constituting the uppermost layer of the discrimination mark 8, which is made of a flexible material made of resin, and furthermore, a surface mark is printed on the top of the upper sheet.

Reference numeral 10 denotes an intermediate sheet constituting the intermediate layer of the discrimination mark 8, which is formed by hardening magnetic powder with a dry paste-like substance.

11 is a lower sheet that constitutes the lowest layer of the discrimination mark 8 and is made of cloth.
It is formed from soft materials such as rubber and cotton-like substances.

12 is a camera controller that adjusts the image obtained by the camera 5; 13 is an image analysis device that analyzes and processes the image output from the camera controller 12;
This device operates the camera 5 when a signal emitted from the camera is input.

Reference numeral 14 denotes an opening/closing control device for the moving gate 4 which receives information on the object to be monitored recognized by the image analysis device 13 as an input signal, and outputs a signal for opening the moving gate 4 when the object to be monitored is only a car 6. Further, when the automobile 6 passes through the gate, a signal for closing the moving gate 4 is outputted using a signal sent to the passage detector 15 which detects the completion of passage as an input signal.

16 is a moving gate 4 that is activated by the opening/closing control device 14
This is a gate opening/closing device that opens and closes the movable gate 4 using a signal for opening and a signal for closing.

In such an object deletion recognition device, when the light emitted from the projector 1 is blocked by an object, a signal is emitted from the photoreceptor 2, and the signal is used as input to operate the camera 5 by the image analysis device 13 to detect the previous object. monitor. The image of the object obtained by the camera 5 is input to an image analysis device 13 controlled by a camera controller 12 and processed. The image of the discrimination mark 8 attached to the automobile 6 in the processed image is detected, and the image of the discrimination mark 8 is attached to the image of the discrimination mark 8. When there is no image of another object other than the image of the car 6 whose ring part is approximately defined, an opening signal for the moving gate 4 is issued from the opening/closing control device 14 and inputted to the gate opening/closing device 16 to open the moving gate 4. be done. When the vehicle 6 passes through the gate, the passage detector 15 detects the completion of passage and outputs a signal to the opening/closing control device 14, which outputs a closing signal for the moving gate 4 to the gate opening/closing device 16. to close the moving gate 4. Further, when an image of another object is detected in the processed image other than the image of the car 6 roughly defined by the image of the discrimination mark 8, no signal is transmitted from the image analysis device 13 to the opening/closing control device 14. , the opening/closing control device 14 does not output an opening signal for the moving gate 4. In this way, the identification mark 8 is attached to the car 6 so as to approximately define the ring part, and the camera 5 monitors a predetermined location in front of the gate from above, and the image is analyzed by the image analysis device 13. Since the car 6 whose ring portion is approximately defined by the discrimination mark 8 in the image can be easily recognized, the car 6 and the animal 7 within the predetermined location can be easily recognized without using a complicated and expensive pattern recognition device. It is possible to recognize the coexistence state of Therefore, by inputting the information on the coexistence state to the opening/closing control device 14, it is possible to reliably allow only the automobile 6 to pass through the gate, resulting in a safe and inexpensive object recognition device. In addition, discrimination mark 8
Since the lower sheet 11 is made of a soft material such as cloth, rubber, or cotton-like material, it will not damage the surface of the automobile 6. Although the surface mark of the upper sheet 9 of the discrimination mark 8 is in the shape of a cross in the embodiment, it may be of any pattern as long as it is not likely to be confused with the pattern of the object to be monitored. As explained above, according to the present invention, a camera is provided above a predetermined location where an object A and another object B can coexist, an image analysis device connected to the camera is provided, and a ring of the object A is provided. A plurality of discrimination marks are provided on the object A so as to substantially define the area, and the state of existence of the object A in the predetermined location is recognized by the image approximately defined by the discrimination marks by the image analysis device. By using the recognized existence state as an output signal to other control systems, it is possible to easily determine the coexistence state of object A and other object B within the predetermined location without using a complicated and expensive pattern recognition device. Since the coexistence state can be recognized as a target value, a control system that uses the coexistence state as a target value can be operated reliably in accordance with the coexistence state, and an inexpensive recognition device can be provided.

[Brief explanation of the drawing]

1A and 1B are drawings showing a conventional device for recognizing objects passing through a gate, and FIGS. 2A and 2B are drawings showing a device for recognizing objects passing through a gate according to an embodiment of the present invention, a front view and a plan view, respectively. It is.

Claims (1)

[Scope of Claims] 1. A camera is provided above a predetermined location where the object A and another object B can coexist, an image analysis device connected to the camera is provided, and the outline of the object A is approximately defined. A plurality of discrimination marks are provided on the object A, and the state of existence of the object A in the predetermined location is recognized by the image substantially defined by the discrimination marks by the image analysis device, and the state of existence is recognized by another person. An object recognition device characterized in that the output signal is an output signal to a control system. 2. The object recognition device according to claim 1, wherein the object A is an automobile and the object B is an animal, and the object recognition device is configured to open the gate when only the automobile A is present within the predetermined location.