JP2005316668A - Identification device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an identification device accurately identifying an object present inside a monitored range. <P>SOLUTION: This identification device has: a wireless tag reader 3 reading identification information from a wireless tag 13 recorded with the identification information about the identification object 12 holding the wireless tag 13; an imaging device 2; an object detection means 20 detecting the identification object 12 present inside a detection range 31 allowing the wireless tag reader 3 to read the identification information from the wireless tag 13, on the basis of image information imaged and obtained by the imaging device 2; an object identification means 21 identifying the identification object 12 detected by the object detection means 20 on the basis of the identification information read by the wireless tag reader 3; and an imaging control means 22 controlling the imaging device 2 such that an imaging range 30 of the imaging device 2 includes the detection range 31. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

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

As shown in FIG. 6, the conventional identification device includes a wireless tag reader 82 that detects a wireless tag 81 that is carried by a monitoring target person 80 and wirelessly transmits a signal including identification information unique to the monitoring target person 80, and imaging. Means 83; number-of-persons detection means 84 for detecting the number of people in the video imaged by the imaging means 83; and the number of wireless tags 81 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 persons, non-portable person determining means 86 for determining the presence / absence of a person not carrying the wireless tag 81 according to the detection output of the number of persons detection means 84 and the detection output of the tag number detection means 85 (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 2004-5511

  However, in the conventional identification device, for example, as shown in FIG. 7, due to the difference between the detection range 91 in which the wireless tag reader 82 can read identification information from the wireless tag 81 and the imaging range 90 of the imaging unit 83, If 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 not having the wireless tag 81 exists in the imaging range 90, the person 93 is wireless. There is a problem that the tag 81 is mistakenly identified as having the tag 81.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide an identification device that can accurately identify an object existing within a range to be monitored.

  The identification device according to the present invention includes a wireless tag reader that reads the identification information from the wireless tag in which identification information of an identification object having a wireless tag is recorded, an imaging device, and an image obtained by being captured by the imaging device. Based on the information, based on the identification information read by the wireless tag reader, object detection means for detecting an identification object existing within a detection range in which the wireless tag reader can read the identification information from the wireless tag An object identifying means for identifying an identification object detected by the object detecting means; and an imaging control means for controlling the imaging device so that an imaging range of the imaging device includes the detection range. doing.

  With this configuration, the imaging device is controlled so that the imaging range of the imaging device includes the detection range in which the wireless tag reader can read the identification information from the wireless tag, so that the person who exists in the monitored range is accurately identified Can do.

  In addition, the identification device of the present invention includes three or more wireless tag readers that read the identification information from the wireless tag in which the identification information of the identification object having the wireless tag is recorded, the imaging device, and the imaging device. An object detection means for detecting an identification object existing within a detection range in which identification information can be read from the wireless tag by three or more of the wireless tag readers based on the image information obtained as described above; Based on the position measurement means for measuring the position of the wireless tag whose identification information has been read by two or more wireless tag readers, the position of the wireless tag measured by the position measurement means and the identification information read by the wireless tag reader, Object identification means for identifying an identification object detected by the object detection means, and an imaging range of the imaging device is the detection range. It has a configuration in which an imaging control means for controlling the image pickup device to include.

  With this configuration, since the position of the wireless tag whose identification information has been read by the wireless tag reader can be measured, the position of a person existing within the monitored range can be measured.

  In the identification device of the present invention, the position measuring unit measures a time from when the electromagnetic waves are transmitted by the three or more wireless tag readers until the identification information transmitted by the same wireless tag is received. The position of the wireless tag is measured based on the time measured for each wireless tag reader.

  With this configuration, it is possible to measure the position of the wireless tag based on the time from when each electromagnetic wave is transmitted by the wireless tag reader until the identification information transmitted by the same wireless tag is received.

  In the identification device of the present invention, a marker is provided at a fixed position with respect to the position where the wireless tag reader is installed, and the object detection means is based on image information obtained by imaging with the imaging device. The marker position is detected, and the detection range in the imaging range is determined based on the detected marker position.

  With this configuration, the position of the marker is detected based on the image information obtained by imaging with the imaging device, and the detection range is determined based on the detected marker position and the characteristics of the wireless tag reader and the wireless tag. Therefore, it is possible to identify a person existing within the detection range from the image information.

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

  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 identification information from the wireless tag.

  Moreover, the identification device of the present invention has a configuration in which the imaging control unit controls the imaging device to magnify and image a specific identification object identified by the object identification unit. Yes.

  With this configuration, it is possible to obtain image information obtained by enlarging a specific person such as a person who does not have a wireless tag or a person who has a wireless tag in which specific identification information is recorded.

  The identification device of the present invention further includes a door control device that controls at least one of opening and closing of the door provided in the vicinity of the detection range and locking of the door based on a result of identification by the object identification means. It has a configuration.

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

  Moreover, the identification apparatus of this invention has the structure provided with the warning device which issues a warning based on the result of the identification by the said object identification means.

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

  The present invention provides an identification device capable of accurately identifying an object existing within a range to be monitored.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
An identification device according to a first embodiment of the present invention is shown in FIG.

  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 so that the automatic door 11 An example of controlling opening and closing will be described.

  Here, the wireless tag 13 has identification information including whether or not it can enter the room 10, and only a person who has the wireless tag 13 having the identification information permitted to enter enters the room 10. Shall be able to.

  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 a chest of a person 12, a computer device 4 provided in a monitoring room, and an automatic door 11. And a door control device 6 that controls opening and closing.

  The imaging device 2 can change the orientation 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 identification information wirelessly transmitted by the wireless tag 13 in response to the transmitted electromagnetic waves.

  The computer device 4 is a non-volatile storage including a central processing unit (hereinafter simply referred to as “CPU”), a ROM (Read Only Memory), a RAM (Random Access Memory), a hard disk device, a flash memory, and the like. A network interface for communicating with an input device such as a medium, a keyboard device or a pointing device, an output device such as a monitor device or a speaker, and other devices connected to the network is provided.

  The computer apparatus 4 includes an object detection unit 20 that detects a person existing in the detection range 31 from which the wireless tag reader 3 can read identification information from the wireless tag 13, and an object that identifies the person existing in the detection range 31. An object identification unit 21; and an imaging control unit 22 that controls the orientation, imaging magnification, and the like of the imaging device 2 so that the imaging range 30 includes the entire detection range 31 based on image information of the imaging range 30 captured by the imaging device 2. Have

  The computer device 4 reads a program stored in a ROM or a non-volatile storage medium into a RAM, and causes the CPU to execute the program read into the RAM, thereby causing the object detection means 20, the object identification means 21, and the imaging. It functions as the 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 detection means 20 determines a detection range 31 in the imaging range 30 based on the marker 5. That is, the object detection unit 20 detects the position of the marker 5 based on the image information obtained by imaging with the imaging device 2, and the detected position of the marker 5 and the characteristics of the wireless tag reader 3 and the wireless tag 13. Based on this, the detection range 31 in the imaging range 30 is determined. 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 a marker.

  The detection of the person existing in the detection range 31 by the object detection means 20 is performed based on the difference between the image information obtained by imaging at different times by the imaging device 2, that is, based on the dynamic change of the image information. It has become.

  The object identifying means 21 identifies the person detected by the object detecting 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 has not been read by the wireless tag reader 3, the object identification means 21 is a person who has entered the detection range 31. Is identified as a person who does not have the wireless tag 13.

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

  The door control device 6 controls the opening / closing of the automatic door 11 based on the result of 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 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, whether or not the imaging range 30 of the imaging device 2 includes the entire detection range 31 determined by the object detection unit 20 is determined by the imaging control unit 22 (S3), and the imaging range 30 is the entire detection range 31. If it is determined that the image pickup range is not included, the image pickup control unit 22 controls the posture, the image pickup magnification, and the like of the image pickup device 2 so that the image pickup range 30 includes the entire detection range 31 (S4).

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

  By performing the identification as described above, as shown in FIG. 3, the identification device 1 can accurately identify the person 40 who has the wireless tag 13 and the person 41 who does not have the wireless tag 13.

  Finally, when it is identified that the person detected by the object detection means 20 has the wireless tag 13 (S8), the door control device 6 permits the automatic door 11 to be opened (S9). When the person detected by the object detection means 20 is identified as not having the wireless tag 13 (S8), the door control device 6 prohibits the opening of the automatic door 11 (S10).

  According to the identification device 1 of the first embodiment of the present invention, the imaging range 30 of the imaging device 2 includes all the detection ranges 31 in which the wireless tag reader 3 can read the identification information from the wireless tag 13. By providing the imaging control means 22 for controlling the posture, imaging magnification, and the like of the imaging device 2, it is possible to accurately identify a person existing within the monitored range.

  In the operation of the identification device 1 described above, steps S2 to S4 may be executed in response to an adjustment request for 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 the identification device 1 with a plurality of imaging devices and performing stereo image processing or the like, the accuracy of human detection by the object detection means 20 can be improved.
Further, the wireless tag 13 may be an active type that wirelessly transmits identification information in response to reception of electromagnetic waves, or a passive type that is driven by a current induced by the received electromagnetic waves and wirelessly transmits identification information. Good.

(Second Embodiment)
FIG. 4 shows an identification apparatus according to the 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 given. Omitted. Further, the components shown in FIG. 4 except for the components of the identification apparatus according to the second embodiment of the present invention are the same as those shown in FIG.

  In FIG. 4, an identification device 50 includes an imaging device 2 and three wireless tag readers 52, 53, 54 that are configured identically to the wireless tag reader 3 that constitutes the identification device 1 according to the first embodiment of the present invention. The markers 55, 56, and 57 provided at fixed positions with respect to the positions where the wireless tag readers 52, 53, and 54 are installed, the computer device 51 provided in the monitoring room, and the door control device 6, respectively. I have.

  The computer device 51 includes a CPU, a ROM, a RAM, a nonvolatile storage medium, an input device, an output device, and a network interface in the same manner as the computer device 4 constituting the identification device 1 according to the first embodiment of the present invention. I have.

  The computer device 51 includes an object detection unit 60 that detects a person existing in a detection range 71 in which the wireless tag readers 52, 53, and 54 can read identification information from the wireless tag 13, and the wireless tag readers 52, 53, and 54. The position measuring means 61 for measuring the position of the wireless tag 13 from which the identification information has been read, the object identifying means 62 for identifying a person existing in the detection range 71, and the image of the imaging range 30 captured by the imaging device 2 An imaging control unit 63 that controls the orientation, 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 information.

  The computer device 51 reads a program stored in a ROM or a non-volatile storage medium into a RAM, and causes the CPU to execute the program read into the RAM, thereby causing the object detection means 60, the position measurement means 61, and the object to be read. It functions as identification means 62 and imaging control means 63.

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

  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, a circle is used for easy understanding of the present invention. It is shown.

  The position measuring means 61 measures the time from when the electromagnetic tag is transmitted by the wireless tag readers 52, 53, 54 at predetermined time intervals until the identification information transmitted by the same wireless tag 13 is received, respectively. The position of the wireless tag 13 is measured based on the time measured for each tag reader 52, 53, 54.

  The object identifying means 62 identifies the person 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. It is supposed to be.

  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 (S20), and the detection range 71 in the imaging range 30 is determined by the markers 55, 56, and 57 detected by the object detection means 60 (S21). Next, it is judged by the imaging control means 63 whether or not the imaging range 30 of the imaging apparatus 2 includes the entire detection range 71 determined by the object detection means 60 (S22), and the imaging range 30 is the entire detection range 71. If it is determined that the image capturing range 30 is not included, the image capturing control unit 63 controls the camera orientation, the image capturing magnification, and the like of the image capturing apparatus 2 so that the image capturing range 30 includes the entire detection range 71 (S23).

  Next, a person existing in the detection range 71 is detected by the object detection means 60 based on image information obtained by imaging by the imaging device 2 (S24), and a person existing in the detection range 71 is detected. Identification information is read from the wireless tag 13 held by the wireless tag readers 52, 53, and 54, respectively (S25).

  Here, the time from when the electromagnetic tag is transmitted by the wireless tag readers 52, 53, and 54 at predetermined time intervals until the identification information transmitted by the same wireless tag 13 is received is measured, and the wireless tag reader 52, Based on the time measured every 53, 54, the position of the wireless tag 13 is measured by the position measuring means 61 (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, a person detected by the object detecting means 60 is identified by the object identifying means 62 ( S27).

  Finally, when it is identified that the person detected by the object detection means 60 has the wireless tag 13 (S28), the door control device 6 permits the automatic door 11 to be opened (S29). When it is identified that the person detected by the object detection means 60 does not have the wireless tag 13 (S28), the door control device 6 prohibits the opening of the automatic door 11 (S30).

  According to the identification device 50 of the second embodiment of the present invention as described above, the position measuring means 61 for measuring the position of the wireless tag 13 whose identification information has been read by the wireless tag readers 52, 53, 54 is provided and monitored. By measuring the position of a person existing within the range to be monitored, it is possible to perform more accurate identification even when a plurality of persons exist within the monitored range.

  In the operation of the identification device 50 described above, steps S21 to S23 may be executed in response to an adjustment request for the imaging device 2 from the computer device 51.

  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 providing the identification device 50 with a plurality of imaging devices and performing stereo image processing or the like, the accuracy of human detection by the object detection means 60 can be improved.

  Although the identification device 50 has been described as including the 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.

  As described above, the identification device according to the present invention has an effect of accurately identifying an object existing within a monitored range, and identifies an object such as a person existing within a specific range. This is useful as an identification device or the like.

The block diagram of the identification apparatus in the 1st Embodiment of this invention The flowchart for operation | movement description of the identification device in the 1st Embodiment of this invention Explanatory drawing for demonstrating the effect | action of the identification device in the 1st Embodiment of this invention. The block diagram of the identification device in the 2nd Embodiment of this invention The flowchart for operation | movement description of the identification device in the 2nd Embodiment of this invention Block diagram of a conventional identification device Explanatory drawing of the conventional identification device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,50 Identification device 2 Imaging device 3, 52, 53, 54, 82 Wireless tag reader 4, 51 Computer device 5, 55, 56, 57 Marker 6 Door control device 10 Room 11 Automatic door 13, 81 Wireless tag 20, 60 Target Object detection means 21, 62 Object identification means 22, 63 Imaging control means 61 Position measurement means 83 Imaging means 84 Number of people detection means 85 Tag number detection means 86 Non-carried person determination means

Claims (8)

A wireless tag reader that reads 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 the wireless tag reader can read identification information from the wireless tag based on image information obtained by being imaged by the imaging device;
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;
An identification apparatus comprising: an imaging control unit that controls the imaging apparatus so that an imaging range of the imaging apparatus includes the detection range. Three or more wireless tag readers that read 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 for detecting an identification object existing within a detection range in which three or more wireless tag readers can read identification information from the wireless tag based on image information obtained by imaging by the imaging device 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;
Object identifying means for identifying the identification object detected by the object detecting means 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 identification apparatus comprising: an imaging control unit that controls the imaging apparatus so that an imaging range of the imaging apparatus includes the detection range. The position measuring means measures the time from when the electromagnetic waves are respectively transmitted by the three or more wireless tag readers until the identification information transmitted by the same wireless tag is received, and is measured for each wireless tag reader. 3. The identification apparatus according to claim 2, wherein the position of the wireless tag is measured based on a predetermined time. A marker is provided at a fixed position with respect to the position where the wireless tag reader is installed,
The object detection means detects the position of the marker based on image information obtained by imaging with the imaging device, and determines the detection range in the imaging range based on the detected marker position. The identification device according to claim 1, wherein the identification device is characterized in that: The identification apparatus according to claim 4, wherein the imaging control unit controls the imaging apparatus based on a detection range determined by the object detection unit. 6. The imaging apparatus according to claim 1, wherein the imaging control unit controls the imaging apparatus to magnify and image a specific identification object identified by the object identification unit. An identification device according to any of the above. 2. A door control device that controls at least one of opening and closing of a door provided in the vicinity of the detection range and locking of the door based on a result of identification by the object identifying means. The identification device according to claim 6. 8. The identification apparatus according to claim 1, further comprising an alarm device that issues an alarm based on a result of identification by the object identification means.

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