WO2005106821A1

WO2005106821A1 - Discrimination device

Info

Publication number: WO2005106821A1
Application number: PCT/JP2005/007418
Authority: WO
Inventors: Hiroshi Miyabe; Syuji Harada
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2004-04-28
Filing date: 2005-04-19
Publication date: 2005-11-10
Also published as: JP2005316668A

Abstract

A discrimination device capable of accurately discriminating an object present in a range being monitored. The discrimination device has a radio tag reader (3) for reading discrimination information of a to-be-discriminated object (12) from a radio tag (13) in which the discrimination information is recorded and which belongs to the to-be-discriminated object (12), an imaging device (2), object detection means (20) for detecting, based on image information obtained by imaging by the imaging device (2), the to-be-discriminated object (12) present in a detection range (31) where the radio tag reader (3) can read the discrimination information from the radio tag (13), object discrimination means (21) for discriminating, based on the discrimination information read by the radio tag reader (3), the to-be-discriminated object (12) detected by the object detection means (20), and imaging control means (22) for controlling the imaging device (2) so that an imaging range (30) of the imaging device (2) includes the detection range (31).

Description

Specification

Identification device

Technical field

The present invention relates to an identification device for identifying an object such as a person existing within a specific range.

Background art

As shown in FIG. 6, a conventional identification device is a wireless tag reader that detects a wireless tag 81 carried by a monitored person 80 and wirelessly transmitting a signal including identification information unique to the monitored person 80. 82, imaging means 83, number detection means 84 for detecting the number of people in the video imaged by the imaging means 83, and the number of persons detected by the wireless tag reader 82 in an area corresponding to the imaging area of the imaging means 83. Tag number detecting means 85 for detecting the number of wireless tags 81, and carrying the wireless tag 81 according to the detection output of the number of people detecting means 84 and the detection output of the tag number detecting means 85, determine whether or not there is a person. A non-carrying person determination means 86 for determination is provided (for example, see Patent Document 1).

Patent Document 1: JP 2004-5551 A

Disclosure of the invention

Problems to be solved by the invention

[0005] In the conventional identification device, for example, as shown in FIG. 7, for example, a detection range 91 in which the wireless tag reader 82 can read identification information from the wireless tag 81, Due to the difference from the imaging range 90, the person 92 having the wireless tag 81 does not exist in the imaging range 90 but exists in the detection range 91, and the person 93 without the wireless tag 81 exists in the imaging range 90. In such a case, there is a problem that the person 93 is mistakenly identified as having the wireless tag 81.

[0004] The present invention has been made to solve the conventional problem, and an object of the present invention is to provide an identification device that can accurately identify an object existing within a monitoring range. Means for solving the problem

[0005] In the identification device of the present invention, identification information of an identification target holding a wireless tag is recorded. A wireless tag reader that reads the identification information from the wireless tag; an imaging device; and the wireless tag reader can read the identification information based on image information obtained by the imaging device. An object detection means for detecting an identification object existing within a detection range; and an object identification means for identifying the identification object detected by the object detection means based on the identification information read by the wireless tag reader. And an imaging control means for controlling the imaging device so that an imaging range of the imaging device includes the detection range.

[0006] With this configuration, the imaging device is controlled so that the imaging range of the imaging device includes a detection range in which the RFID tag reader can read the RFID tag identification information. Can be done accurately.

[0007] Also, the identification device of the present invention includes three or more wireless tag readers for reading the identification information from the wireless tag in which the identification information of the identification object holding the wireless tag is recorded, an imaging device, Object detection means for detecting an identification object existing within a detection range in which three or more wireless tag readers can read the identification information of the wireless tag based on image information obtained by imaging by an imaging device. Position measuring means for measuring the position of the wireless tag from which the identification information has been read by the three or more wireless tag readers; and the position of the wireless tag measured by the position measuring means and the position of the wireless tag read by the wireless tag reader. The object identification means for identifying the identification object detected by the object detection means based on the identification information, and the imaging range of the imaging device are set to the detection range. An imaging control means for controlling the imaging device so as to include the output range.

[0008] With this configuration, the position of the wireless tag from which the identification information has been read by the wireless tag reader can be measured, so that the position of a person present within the monitoring range can be measured.

[0009] In the identification device of the present invention, the position measurement means may receive the identification information transmitted by the same wireless tag after the electromagnetic waves are respectively transmitted by the three or more wireless tag readers. And the position of the wireless tag is measured based on the time measured for each wireless tag reader. [0010] With this configuration, it is possible to measure the position of the wireless tag based on the time from when the electromagnetic wave is transmitted by the wireless tag reader to when the identification information transmitted by the same wireless tag is received.

[0011] Further, the identification device of the present invention provides a marker at a fixed position with respect to the position where the wireless tag reader is installed, and the object detecting means includes image information obtained by imaging by the imaging device. Detecting the position of the marker based on the position of the marker, and determining the detection range in the imaging range based on the position of the detected marker.

With this configuration, the position of the marker is detected based on the image information obtained by the imaging device, and the detection range is determined based on the detected position of the marker and the characteristics of the wireless tag reader and the wireless tag. Therefore, it is possible to specify a person present in the image information power detection range.

[0013] Further, the identification device of the present invention has a configuration in which the imaging control means controls the imaging apparatus based on a detection range determined by the object detection means.

[0014] With this configuration, the imaging device can be controlled so that the imaging range of the imaging device includes a detection range in which the wireless tag reader can read the RFID tag identification information.

[0015] Further, the identification device of the present invention has a configuration in which the imaging control unit controls the imaging device to enlarge and image a specific identification target object identified by the target object identification unit. Have.

[0016] With this configuration, a person who does not have a wireless tag, a person who has a wireless tag in which specific identification information is recorded, and image information obtained by enlarging and photographing a specific person, such as a stub, are obtained. be able to.

[0017] Further, the identification device of the present invention is a door control that controls at least one of opening and closing of a door provided near the detection range and locking of the door based on a result of identification by the object identification means. It has a configuration equipped with a device.

With this configuration, it is possible to control the flow of a person passing through the monitored area.

Further, the identification device of the present invention provides a warning based on the result of the identification by the object identification means. With a configuration equipped with an alarm device that issues a report! / Puru.

[0020] With this configuration, when a person who does not have a wireless tag enters an area to be monitored, an alarm can be issued to a monitoring room or the like.

The invention's effect

[0021] The present invention provides an identification device that can accurately identify an object existing within a monitoring range.

Brief Description of Drawings

FIG. 1 is a block diagram of an identification device according to a first embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the identification device according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram for explaining an operation of the identification device according to the first exemplary embodiment of the present invention.

FIG. 4 is a block diagram of an identification device according to a second embodiment of the present invention.

FIG. 5 is a flowchart for explaining the operation of the identification device according to the second embodiment of the present invention.

FIG. 6 is a block diagram of a conventional identification device.

FIG. 7 is an explanatory diagram of a conventional identification device.

Explanation of symbols

[0023] 1, 50 identification device

2 Imaging device

3, 52, 53, 54, 82 Wireless tag reader

4, 51 Computer equipment

5, 55, 56, 57 markers

6 Door control device

10 rooms

11 Automatic door

13, 81 wireless tag

20, 60 Object detection means 21, 62 Object identification means

22, 63 Imaging control means

61 Position measurement means

83 Imaging means

84 Person detection means

85 Tag number detection means

86 Non-carrying person judgment method

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment)

FIG. 1 shows an identification device according to a first embodiment of the present invention.

In the present embodiment, the entrance side of the automatic door 11 for entering the room 10 where entry is restricted is set as the monitoring range, and the identification device 1 identifies the person 12 existing in the monitoring range. An example of controlling the opening and closing of the automatic door 11 will be described.

Here, the wireless tag 13 has identification information including whether or not the wireless tag 13 can enter the room 10, and only the person holding the wireless tag 13 having the identification information permitted to enter the room 10 can enter the room 10. It is assumed that you can progress.

[0028] The identification device 1 includes an imaging device 2 such as a camera, a wireless tag reader 3 that reads identification information from a wireless tag 13 attached to the chest or the like of a person 12, and a computer device 4 provided in a monitoring room or the like. And a door control device 6 for controlling the opening and closing of the automatic door 11.

The imaging device 2 is configured to be able to change the attitude of the camera, the imaging magnification, and the like, based on a control signal from the computer device 4. The wireless tag reader 3 transmits electromagnetic waves at predetermined time intervals, and reads the identification information wirelessly transmitted by the wireless tag 13 according to the transmitted electromagnetic waves!

The computer device 4 includes a central processing unit (hereinafter simply referred to as “CPU”), a ROM (Read Only Memory), a RAM (Random Access Memory), a node disk device, a flash memory, and the like. Non-volatile storage medium, input device consisting of keyboard device, pointing device, etc., output device consisting of monitor device, speaker, etc. It has a network interface for communicating with the device and other devices connected to the network.

The computer device 4 includes an object detection unit 20 for detecting a person present in a detection range 31 in which the wireless tag reader 3 can read identification information from the wireless tag 13, and a person present in the detection range 31. Imaging that controls the attitude and the imaging magnification of the imaging device 2 so that the imaging range 30 includes the entire detection range 31 based on the object identification means 21 to be identified and the image information of the imaging range 30 captured by the imaging device 2. And control means 22.

[0032] The computer device 4 reads the program stored in the ROM or the non-volatile storage medium into the RAM, and causes the CPU to execute the program read into the RAM. It functions as the object identification means 21 and the imaging control means 22.

A marker 5 is provided at a predetermined position with respect to the position where the wireless tag reader 3 is installed. The object detecting means 20 determines the detection range 31 in the imaging range 30 based on the marker 5. That is, the object detecting means 20 detects the position of the marker 5 based on the image information obtained by the image pickup by the image pickup device 2, and detects the position of the detected marker 5, the wireless tag reader 3 and The detection range 31 in the imaging range 30 is determined based on the characteristics of the wireless tag 13. Here, the marker 5 may be provided integrally with the wireless tag reader 3 or the wireless tag reader 3 itself may be used as the marker.

[0034] The detection of a person present in the detection range 31 by the object detection means 20 is based on a difference between image information obtained by the imaging device 2 being imaged at different times, that is, based on a dynamic change of the image information. It's been done! /

The object identification means 21 is configured to identify a person detected by the object detection means 20 based on the identification information read by the wireless tag reader 3. For example, when a person who has entered the detection range 31 is detected by the object detection means 20 and new identification information is not read by the wireless tag reader 3, the object identification means 21 moves to the detection range 31. The person who has entered the vehicle holds the wireless tag 13 so as to be identified as a person.

The imaging control unit 22 performs imaging so that the imaging range 30 of the imaging device 2 includes the entire detection range 31. In addition to controlling the device 2, the identification identified by the object identification means 21, such as a person who does not have the wireless tag 13 or a person who has the wireless tag 13 in which specific identification information is recorded. The imaging device 2 is controlled so that the person is enlarged and imaged.

[0037] The door control device 6 controls the opening and closing of the automatic door 11 based on the result of the identification by the object identification means 21. Here, the identification device 1 may include an alarm device that issues an alarm based on the result of the identification by the object identification means 21!

The operation of the identification device 1 configured as described above will be described with reference to FIG.

First, the imaging range 30 is imaged by the imaging device 2 (S1), and the detection range 31 in the imaging range 30 is determined by the marker 5 detected by the object detection means 20 (S2). Next, the imaging control unit 22 determines whether the imaging range 30 of the imaging device 2 includes the entire detection range 31 determined by the target object detection unit 20 (S3), and the imaging range 30 is the entire detection range 31. When it is determined that the imaging range is not included, the attitude and the imaging magnification of the imaging device 2 are controlled by the imaging control unit 22 so that the imaging range 30 includes the entire detection range 31 (S4).

Next, a person present in the detection range 31 is detected by the object detection means 20 based on the image information obtained by the imaging device 2 (S5), and the person present in the detection range 31 is detected. The identification information is read by the wireless tag reader 3 from the wireless tag 13 held by the person performing the reading (S6), and the person detected by the object detection means 20 is identified by the object identification means based on the identification information read by the wireless tag reader 3. 21 (S7).

By performing the above identification, as shown in FIG. 3, the identification device 1 can accurately identify the person 40 holding the wireless tag 13 and the person 41 not holding the wireless tag 13. it can

Finally, when the person detected by the object detecting means 20 is identified as holding the wireless tag 13 (S8), the opening of the automatic door 11 is permitted by the door control device 6 ( (S9), when the person detected by the object detection means 20 is identified as not holding the wireless tag 13 (S8), the opening of the automatic door 11 is prohibited by the door control device 6 (S10). _o According to the identification device 1 of the first embodiment of the present invention, the detection range 31 in which the wireless tag reader 3 can read identification information from the wireless tag 13 is changed to the imaging range 30 of the imaging device 2. By providing the imaging control means 22 for controlling the attitude and the imaging magnification of the imaging device 2 so as to include all of

In the operation of the identification device 1 described above, steps S2 to S4 may be executed in response to a request for adjustment of the imaging device 2 from the computer device 4.

Although the identification device 1 has been described as including one imaging device 2, the identification device of the present invention may include a plurality of imaging devices. By providing a plurality of imaging devices to the identification device 1 and performing stereo image processing or the like, the accuracy of detection of a person by the object detection means 20 can be improved.

Furthermore, the wireless tag 13 is an active type that wirelessly transmits identification information in response to reception of an electromagnetic wave, or a passive type that wirelessly transmits identification information by being driven by a current induced by the received electromagnetic wave. Yeah.

(Second Embodiment)

FIG. 4 shows an identification device according to a second embodiment of the present invention. In the identification device according to the second embodiment of the present invention, the same components as those of the identification device 1 according to the first embodiment of the present invention are denoted by the same reference numerals, and the description thereof will be omitted. Is omitted. Also, among the components illustrated in FIG. 4 except for the components of the identification device according to the second embodiment of the present invention, components denoted by the same reference numerals as those illustrated in FIG. 1 are the same components. is there.

In FIG. 4, the identification device 50 includes an imaging device 2 and three wireless tag readers 52 each having the same configuration as the wireless tag reader 3 constituting the identification device 1 according to the first embodiment of the present invention. 53, 54, markers 55, 56, 57 provided at fixed positions relative to the positions where the wireless tag readers 52, 53, 54 are installed, and a computer device 51 provided in a monitoring room or the like, A door control device 6 is provided.

[0048] The computer device 51 includes a CPU, a ROM, a RAM, a non-volatile storage medium, an input device, and an output device, similarly to the computer device 4 constituting the identification device 1 according to the first embodiment of the present invention. And a network interface. [0049] The computer device 51 includes target detection means 60 for detecting a person present in a detection range 71 in which the wireless tag readers 52, 53, 54 can read identification information from the wireless tag 13, and wireless tag readers 52, 53 , 54, a position measuring means 61 for measuring the position of the wireless tag 13 from which the identification information has been read, an object identifying means 62 for identifying a person present in the detection range 71, and an image taken by the imaging device 2. An imaging control unit 63 is provided that controls the attitude, imaging magnification, and the like of the imaging device 2 so that the imaging range 30 includes the entire detection range 71 based on the image information of the range 30.

[0050] The computer device 51 reads the program stored in the ROM or the non-volatile storage medium into the RAM, and causes the CPU to execute the program read into the RAM. It functions as the measuring means 61, the object identifying means 62, and the imaging control means 63.

[0051] The object detecting means 60 detects the positions of the markers 55, 56, and 57 based on the image information obtained by imaging by the imaging device 2, and detects the positions of the detected markers 55, 56, and 57, The detection range 71 in the imaging range 30 is determined based on the characteristics of the wireless tag readers 52, 53, 54 and the wireless tag 13.

Note that the detection range 71 is determined by the arrangement of the wireless tag readers 52, 53, 54 and the characteristics of the wireless tag readers 52, 53, 54 and the wireless tag 13, but in FIG. 4, the present invention is easily understood. For the sake of clarity.

[0053] The position measuring means 61 performs the processing until the identification information transmitted by the wireless tags 13 having the same force after the electromagnetic waves are transmitted at predetermined time intervals by the wireless tag readers 52, 53, and 54, respectively. The time is measured, and the position of the wireless tag 13 is measured based on the time measured for each of the wireless tag readers 52, 53, and 54.

The object identifying means 62 is detected by the object detecting means 60 based on the position of the wireless tag 13 measured by the position measuring means 61 and the identification information read by the wireless tag readers 52, 53, 54. I started to identify the people who did.

The operation of the identification device 50 configured as described above will be described with reference to FIG.

First, the imaging range 30 is imaged by the imaging device 2 (S 20), and the detection range 71 in the imaging range 30 is determined by the markers 55, 56, 57 detected by the object detection means 60. (S21). Next, it is determined by the imaging control unit 63 whether or not the imaging range 30 of the imaging device 2 includes the entire detection range 71 determined by the object detection unit 60 (S22). When it is determined that the detection range does not include all of them, the camera attitude and the imaging magnification of the imaging device 2 are controlled by the imaging control means 63 so that the imaging range 30 includes the entire detection range 71 (S23).

Next, based on the image information obtained by the imaging device 2, a person present in the detection range 71 is detected by the object detection means 60 (S 24), and the person is detected within the detection range 71. The identification information is read from the wireless tag 13 held by the existing person by the wireless tag readers 52, 53, 54 (S25).

Here, the time from when the electromagnetic waves are transmitted at predetermined time intervals by the wireless tag readers 52, 53, and 54 to when the identification information transmitted by the same wireless tag 13 is received is measured. The position of the wireless tag 13 is measured by the position measuring means 61 based on the time measured for each of the tag readers 52, 53, 54 (S26).

Next, based on the position of the wireless tag 13 measured by the position measuring means 61 and the identification information read by the wireless tag reader 3, the person detected by the object detecting means 60 is detected by the object identifying means 62. It is identified (S27).

[0060] Finally, when the person detected by the object detecting means 60 is identified as holding the wireless tag 13 (S28), the opening of the automatic door 11 is permitted by the door control device 6. (S29), if it is determined that the person detected by the object detecting means 60 does not have the wireless tag 13 (S28), the opening of the automatic door 11 is prohibited by the door control device 6 ( S30).

According to such an identification device 50 of the second embodiment of the present invention, the position measuring means 61 for measuring the position of the wireless tag 13 from which the identification information has been read by the wireless tag readers 52, 53, 54 By setting the position and measuring the position of a person present in the range to be monitored, more accurate identification can be performed even when a plurality of persons exist in the range to be monitored.

[0062] In the operation of the identification device 50 described above, steps S21 to S23 may be executed in response to a request for adjustment of the imaging device 2 from the computer device 51. [0063] Although the identification device 50 has been described as including one imaging device 2, the identification device of the present invention may include a plurality of imaging devices. By performing stereo image processing and the like by providing the identification device 50 with a plurality of imaging devices, the accuracy of detection of a person by the object detection means 60 can be improved.

Although the identification device 50 has been described as including three wireless tag readers 52, 53, and 54, the identification device of the present invention may include four or more wireless tag readers. By providing the identification device 50 with four or more wireless tag readers, the measurement accuracy of the position of the wireless tag 13 by the position measuring means 61 can be improved.

Industrial applicability

[0065] As described above, the identification device according to the present invention has an effect that it is possible to accurately identify an object existing within the range to be monitored. It is useful as an identification device for identifying an elephant.

Claims

The scope of the claims

[1] a wireless tag reader for reading the identification information, wherein the identification information of the identification target holding the wireless tag is recorded;

An imaging device;

An object for detecting an identification target existing within a detection range in which the wireless tag reader can read the wireless tag power identification information based on image information obtained by imaging by the imaging device. Detecting means;

Object identification means for identifying an identification object detected by the object detection means based on the identification information read by the wireless tag reader;

An identification device, comprising: imaging control means for controlling the imaging device so that an imaging range of the imaging device includes the detection range.

[2] A marker is provided at a fixed position with respect to the position where the wireless tag reader is installed, and the object detecting means detects the position of the marker based on image information obtained by imaging by the imaging device. 2. The identification device according to claim 1, wherein the identification range is determined, and the detection range in the imaging range is determined based on the detected position of the marker.

3. The identification device according to claim 2, wherein the imaging control means controls the imaging apparatus based on a detection range determined by the object detection means.

4. The imaging control device according to claim 1, wherein the imaging control unit controls the imaging device to magnify and image a specific identification target object identified by the target object identification unit. Identification device.

[5] A door control device for controlling at least one of opening and closing of a door provided near the detection range and locking of the door based on a result of the identification by the object identification means. Item 1. The identification device according to Item 1.

6. The identification device according to claim 1, further comprising an alarm device that issues an alarm based on a result of the identification by the object identification unit.

[7] The wireless tag power in which the identification information of the identification target holding the wireless tag is recorded. Three or more wireless tag readers that read different information,

An imaging device;

Based on image information obtained by being imaged by the imaging device, an object for detecting an identification object existing within a detection range where three or more of the wireless tag readers can read the wireless tag force identification information Object detection means;

Position measuring means for measuring the position of the wireless tag whose identification information has been read by the three or more wireless tag readers;

Based on the position of the wireless tag measured by the position measuring means and the identification information read by the wireless tag reader, an object identifying means for identifying an identification object detected by the object detecting means;

[8] The position measuring means measures the time from when electromagnetic waves are respectively transmitted by the three or more wireless tag readers to when the identification information transmitted by the same wireless tag is received. 8. The identification device according to claim 7, wherein the position of the wireless tag is measured based on the time measured on the wireless tag.

[9] A marker is provided at a fixed position with respect to the position where the wireless tag reader is installed, and the object detecting means detects the position of the marker based on image information obtained by imaging by the imaging device. 8. The identification device according to claim 7, wherein the detection range is determined, and the detection range in the imaging range is determined based on the position of the detected marker.

10. The identification device according to claim 9, wherein the imaging control unit controls the imaging device based on a detection range determined by the object detection unit.

11. The imaging device according to claim 7, wherein the imaging control unit controls the imaging device so as to enlarge and image the specific identification target object identified by the target object identification unit. Identification device.

[12] The sensor is provided near the detection range based on the result of the identification by the object identification means. The identification device according to claim 7, further comprising a door control device that controls at least one of opening and closing of the door and locking of the door.

8. The identification device according to claim 7, further comprising an alarm device that issues an alarm based on a result of the identification by the object identification unit.