JP2004208229A - Object identification system, light emitting device, and detection apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an object identification system which can identify an object positioned in the line of sight direction of a user, has high processing speed and can be miniaturized to be worn by a person and is low-cost. <P>SOLUTION: An infrared tag 6 is mounted on the object and transmits an ID number uniquely assigned to the object by flickering infrared rays, and a detection apparatus 1 is worn by the user and detects the ID number of the object transmitted from the infrared tag positioned within user's visual field and XY coordinates within an infrared image of the infrared tag 6. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
INDUSTRIAL APPLICABILITY The present invention is used in an object identification system that detects a light emitting device attached to an object by a detection device attached to a user to identify an object located in the field of view of the user, and the object identification system. The present invention relates to a light emitting device and a detection device.
[0002]
[Prior art]
2. Description of the Related Art In recent years, a technology has been developed for recognizing a person's position using a wireless or wearable navigation system in order to recognize the movement of a person in a room. In addition, a technology has been developed for automatically recognizing the ID (identification information) of an object viewed by a person using an ID tag that blinks infrared rays at a high speed (for example, see Non-Patent Documents 1 and 2).
[0003]
[Non-patent document 1]
Hisashi Aoki, Infrared tag read by camera and its application, Interactive system and software VIII (WISS 2000), Japan Society for Software Science and Technology, Modern Science Company, 2000, pp. 131-136
[Non-patent document 2]
Nobuyuki Matsushita, 4 others, ID Cam: an image sensor capable of simultaneously acquiring a scene and an ID, Interaction 2002, Information Processing Society of Japan, 2002, pp. 9-16
[0004]
[Problems to be solved by the invention]
However, in the above-described method using an ID tag that flashes infrared light at a high speed, since a normal camera is used, the processing speed cannot be sufficiently ensured. I couldn't do that. In some cases, the processing speed is improved by using a special high-speed camera, but the camera becomes expensive and large, and cannot be applied to applications worn by humans.
[0005]
An object of the present invention is to provide an object identification system capable of identifying an object located in the direction of a user's line of sight, having a high processing speed, and capable of being reduced in size and cost so that it can be worn by a person. An object of the present invention is to provide a light emitting device and a detection device used in an object identification system.
[0006]
[Means for Solving the Problems]
An object identification system according to the present invention includes a light emitting device attached to an object, and a detection device attached to a user, wherein the light emitting device has a light emitting unit that emits infrared light, and the light emitting device is attached. Light-emitting control means for blinking the light-emitting means according to the identification information uniquely assigned to the object, the detection device has an optical axis substantially coincident with the user's line of sight, A photographing means for photographing an infrared image of a predetermined photographing area including the light emitting apparatus; a light emitting device detecting means for detecting a light emitting device using the infrared image photographed by the photographing means; and a blinking state of the light emitting device detected by the light emitting device detecting means. And identification information detecting means for detecting the identification information of the light emitting device.
[0007]
In the object identification system according to the present invention, the light emitting device blinks according to the identification information uniquely assigned to the object to which the light emitting device is attached, and the detection device attached to the user causes Since an infrared image of a predetermined imaging region including an object positioned in the line of sight is captured, the blinking state of the light emitting device detected using the captured infrared image is detected, and identification information of the light emitting device is detected. , An object located in the user's line of sight can be identified.
[0008]
Here, since the light emitting device can be realized by a simple configuration of blinking infrared light according to the identification information of the object, the light emitting device can be downsized, and the detection device can detect the object by using an infrared image. Since the identification information is detected, it is possible to suppress an adverse effect due to light having a wavelength in the visible light region to be a disturbance, and to speed up the detection process, without using a special high-speed camera or the like. The detection device can be configured using a small and inexpensive CMOS image sensor or the like. Therefore, it is possible to realize an object identification system which can identify an object located in the user's line of sight, has a high processing speed, and can be reduced in size and cost so that it can be worn by a person. .
[0009]
It is preferable that the light emitting device detecting means detects a light spot of a predetermined size from the infrared image as the light emitting device. In this case, since the light emitting device can be detected by a simple process of detecting a light spot of a predetermined size from the infrared image, the speed of the detection process in the detection device can be further increased.
[0010]
The light emitting device detecting means determines a detection area including a light spot from the infrared image, the photographing means photographs an infrared image of the detection area, and the identification information detecting means detects the light emitting device using the infrared image of the detection area. Preferably, the blinking state of the light emitting device detected by the means is detected to detect the identification information of the light emitting device.
[0011]
In this case, the detection area including the light spot is determined from the infrared image, and the blinking state of the light emitting device is detected using only the infrared image of the detection area to detect the identification information of the light emitting device. Can be limited to the minimum necessary, and the detection process in the detection device can be further speeded up.
[0012]
It is preferable that the imaging unit has a near-infrared transmission filter, receives near-infrared transmitted through the near-infrared transmission filter, and captures a near-infrared image of a predetermined imaging region including the target object.
[0013]
In this case, the identification information of the light-emitting device can be detected using a near-infrared image created mainly from only near-infrared light, so that the adverse effect of light having a wavelength in the visible light region that becomes a disturbance is sufficiently reduced. And the detection process can be further speeded up.
[0014]
The detection device includes a light-emitting device that emits infrared light, and a light-emitting device for a detection device that includes a light-emission control unit that blinks the light-emitting device according to identification information uniquely assigned to a user who wears the detection device. Furthermore, it is preferable that the detection device is mounted on the head of the user.
[0015]
In this case, a light emitting unit that blinks in accordance with the identification information uniquely assigned to the user can be integrally configured, and the downsized detection device can be mounted on the user's head. Not only can an object located in the direction of the user's line of sight be identified, but also the object located in the direction of the other user's line of sight can be identified as the side on which the user is viewed. Can be expanded.
[0016]
The object identification system further includes a fixed detection device fixed to a structure constituting a space where the user is located, the fixed detection device has an optical axis set in a predetermined direction, and includes a predetermined imaging including the user. A photographing means for photographing an infrared image of the region, a light emitting device detecting means for detecting the light emitting device for the detecting device using the infrared image photographed by the photographing means, and a light emitting device for the detecting device detected by the light emitting device detecting means. Identification information detecting means for detecting the blinking state and detecting the identification information of the light emitting device for the detection device, wherein the angle of view of the imaging means of the fixed detection device is preferably smaller than the angle of view of the imaging means of the detection device. .
[0017]
In this case, not only the detection device mounted on the user's head, but also a user located far away and an object in the line of sight of the user can be detected by a fixed detection device fixed to a structure constituting a space where the user is located. Since the detection can be performed, the situation around the user can be detected in a wide range from different viewpoints.
[0018]
The detection device has an optical axis aligned with the optical axis of the imaging unit, and further includes a visible light imaging unit that captures a visible light image in the user's line of sight, and the detection device is mounted on the user's head. Is preferred.
[0019]
In this case, a downsized detection device having an optical axis aligned with the optical axis of the imaging means and integrally integrating visible light imaging means for imaging a visible light image in the user's line of sight is mounted on the user's head. Therefore, not only can an object located in the user's line of sight be identified, but also an image of the object can be taken at the same time.
[0020]
A light-emitting device according to the present invention is a light-emitting device attached to an object and detected by a detection device attached to a user, and a light-emitting unit that emits infrared light, and an object to which the light-emitting device is attached. And light emission control means for blinking the light emission means in accordance with the uniquely assigned identification information.
[0021]
In the light emitting device according to the present invention, since the light emitting means blinks in accordance with the identification information uniquely assigned to the attached object, a predetermined photographing area including the object located in the user's line of sight is provided. If the user is equipped with a detecting device that detects the flashing state of the light emitting device detected using the captured infrared image and detects the identification information of the light emitting device, the detecting device Can be identified.
[0022]
Here, since the light emitting device can be realized by a simple configuration of blinking infrared light according to the identification information of the object, the light emitting device can be downsized, and the detection device can detect the object by using an infrared image. Since the identification information is detected, it is possible to suppress an adverse effect due to light having a wavelength in the visible light region to be a disturbance, and to speed up the detection process, without using a special high-speed camera or the like. The detection device can be configured using a small and inexpensive CMOS image sensor or the like. Therefore, it is possible to realize an object identification system which can identify an object located in the user's line of sight, has a high processing speed, and can be reduced in size and cost so that it can be worn by a person. .
[0023]
A detection device according to the present invention is a detection device that is mounted on a user and detects a light emitting device attached to an object, has a light axis substantially aligned with a user's line of sight, and includes a predetermined object including an object. Photographing means for photographing an infrared image of the photographing area, a light emitting device detecting means for detecting a light emitting device using the infrared image photographed by the photographing means, and detecting a blinking state of the light emitting device detected by the light emitting device detecting means And identification information detecting means for detecting identification information of the light emitting device.
[0024]
In the detection device according to the present invention, when the light-emitting device blinks according to the identification information uniquely assigned to the attached object, a predetermined imaging region including the object located in the user's line of sight An infrared image of the light emitting device is photographed, and the blinking state of the light emitting device detected using the photographed infrared image is detected, and the identification information of the light emitting device is detected, so that an object located in the user's line of sight is identified. be able to.
[0025]
Here, since the light emitting device can be realized by a simple configuration of blinking infrared light according to the identification information of the object, the light emitting device can be downsized, and the detection device can detect the object by using an infrared image. Since the identification information is detected, it is possible to suppress an adverse effect due to light having a wavelength in the visible light region to be a disturbance, and to speed up the detection process, without using a special high-speed camera or the like. The detection device can be configured using a small and inexpensive CMOS image sensor or the like. Therefore, it is possible to realize an object identification system which can identify an object located in the user's line of sight, has a high processing speed, and can be reduced in size and cost so that it can be worn by a person. .
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an object identification system according to the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an object identification system according to one embodiment of the present invention.
[0027]
The object identification system shown in FIG. 1 includes a detection device 1, an infrared tag 6, and a fixed detection device 7. The infrared tag 6 is attached to the object itself or in the vicinity thereof, and transmits an ID number (identification information) uniquely assigned to the object by flashing infrared rays. The detection device 1 includes an infrared tag 6 while detecting an ID number of an object and an XY coordinate in an infrared image of the infrared tag 6 which are attached to the user and transmitted from the infrared tag 6 located within the field of view of the user. A visible light image is captured, and information such as the detected ID number and XY coordinates and the captured visible light image are output to the portable computer 10. The portable computer 10 performs predetermined processing such as addition of time information to each piece of input information, and transmits each piece of information to the server 11 wirelessly.
[0028]
In addition, the detecting device 1 transmits the user's ID number by blinking infrared rays. The fixed detection device 7 is fixed to a structure constituting a space where the user is located, and is an ID number transmitted from the detection device 1 and the infrared tag 6 located in the imaging range, and an infrared image of the detection device 1 and the infrared tag 6 XY coordinates are detected and output to the server 11.
[0029]
The information collected as described above is used for various purposes in the server 11, and is used, for example, to create an interaction corpus which serves as a knowledge base storing interaction data relating to the interaction between people. Is done.
[0030]
The detection device 1 includes an infrared detection unit 2, an image capturing unit 3, an infrared tag 4, and a microphone unit 5. FIG. 2 is a schematic perspective view showing the appearance of the detection device 1 shown in FIG. As shown in FIG. 2, the detection device 1 is configured as an ear-hung neckband headset worn on the user's head, and is worn on the user's head. The infrared detecting unit 2 and the image capturing unit 3 are integrally incorporated in a rectangular parallelepiped housing, the infrared tag 4 is integrally fixed to a side surface of the housing, and the microphone unit 5 is arranged near the mouth of the user. The portable computer 10 is used by being carried on the user, and each output from the detection device 1 is supplied to the portable computer 10.
[0031]
Referring to FIG. 1 again, the infrared tag 6 includes an LED (Light Emitting Diode) 61 and a drive circuit 62. The LED 61 is composed of an infrared LED or the like. For example, a high output light emitting diode for optical communication (DN311 manufactured by Stanley) can be used, and an infrared LED having a weak directivity and about 800 nm close to visible light is preferably used. Can be used.
[0032]
The drive circuit 62 is composed of a microcomputer or the like. For example, a 4 MHz drive microcomputer AT90S2323 manufactured by Atmel can be used, and an ID number uniquely assigned to an object to which the infrared tag 6 is attached is identified. The LED 61 is controlled to blink as much as possible. The LED 61 and the drive circuit 62 are supplied with power from an internal battery (not shown).
[0033]
Specifically, the drive circuit 62 repeatedly transmits an ID number (6 bits) and a parity bit and a start bit (1 bit) and an end bit (2 bits) encoded by the Manchester encoding method by blinking at a cycle of 200 Hz. For example, in the case of ID number 62, ID: 62 → “011001010101101111” (here, start bit (01), ID number 6 bits, parity bit (even number 10, odd number 01), end bit (1111)).
[0034]
The infrared detector 2 includes an infrared filter 21, a lens 22, a CMOS image sensor 23, and an image processing device 24. The infrared filter 21 transmits mainly the near infrared ray among the infrared rays emitted from the LED 61 of the infrared tag 6 and guides the near infrared ray to the lens 22. As the infrared filter 21, for example, a plastic IR pass filter manufactured by Edmund Corporation that blocks visible light and passes near infrared light can be used.
[0035]
The lens 22 forms near-infrared light transmitted through the infrared filter 21 on the CMOS image sensor 23. The angle of view of the lens 22 is 90 degrees. In this case, in a face-to-face conversation state or the like, an infrared tag located at a relatively short distance and in a wide range can be easily detected.
[0036]
The CMOS image sensor 23 captures a near-infrared image composed of near-infrared rays formed by the lens 22 and outputs it to the image processing device 24. As the CMOS image sensor 23, for example, an artificial retina LSI (M64283FP) manufactured by Mitsubishi Electric Corporation or the like can be used, and the resolution in this case is 128 × 128 pixels.
[0037]
The image processing device 24 controls the CMOS image sensor 23 and performs data processing, detects the infrared tag 6 from the near-infrared image captured by the CMOS image sensor 23, and detects the ID number from the blinking state of the detected infrared tag 6. At the same time, the XY coordinates of the infrared tag 6 on the infrared image are detected, and data such as an ID number and XY coordinates are output to the portable computer 10 according to a data transmission standard such as RS232C. As the image processing device 24, for example, a 49 MHz drive microcomputer C8051F124 manufactured by Cygnal can be used.
[0038]
In this case, the CMOS image sensor 23 is driven by a clock of 115200 Hz, and after imaging (shutter release), the brightness of one pixel is serially output as an analog value every clock. For this reason, the shortest frame rate at the time of shooting all pixels is (shutter speed) + (128 × 128 × clock speed), but 8 × 8 pixels out of 128 × 128 pixels are set as the detection area and the shutter speed is 500 Hz. When capturing an image, a frame rate of 400 Hz can be realized, and the reading speed can be increased. As described above, since reading is performed at a frame rate (400 Hz) that is twice the blinking cycle (200 Hz) of the infrared tag 6, asynchronous communication can be performed using the single LED 61. When a lens 22 having an angle of view of 90 degrees is used, 1 pixel at a distance of 2 m corresponds to a range of 2.2 cm × 2.2 cm.
[0039]
As described above, since the infrared detection unit 2 can detect the ID number of the infrared tag 6 using the near-infrared image created mainly from only near-infrared light, it has a wavelength in the visible light region that causes disturbance. The adverse effect of light can be sufficiently reduced, and the detection process can be sped up.
[0040]
The image photographing unit 3 includes a lens 31 and a CCD camera 32. The lens 31 forms, on the CCD camera 32, a visible light image including an object to which the infrared tag 6 is attached, which is located in the user's line of sight. The CCD camera 32 captures a visible light image and outputs a video signal to the portable computer 10. As the lens 31 and the CCD camera 32, for example, a small CCD camera (horizontal angle of view: 44 degrees) manufactured by KEYENCE having an analog video output can be used. Here, the optical axis of the lens 31 is aligned with the optical axis of the lens 22 of the infrared detection unit 2 and not only identifies an object located in the user's line of sight but also captures an image of the object at the same time. can do.
[0041]
The infrared tag 4 includes an LED 41 and a drive circuit 42. The infrared tag 4 is configured integrally with the detection device 1 and is configured of the same hardware as the infrared tag 6 except that the ID number of the user wearing the detection device 1 is transmitted, and operates similarly. In this case, the detection device 1 can be mounted on the user's head by integrally forming the infrared tag 4 that blinks in accordance with the ID number uniquely assigned to the user, so that the user can use it. In addition to identifying the object located in the line of sight of the user as the viewing side, it is also identified as the object located in the line of sight of another user as the side where the user is seen, and collecting the above-mentioned interaction corpus. Can be suitably used for various applications.
[0042]
The microphone unit 5 includes an audio processing circuit 51 and a microphone 52. The microphone 52 collects the utterance or ambient sound of the user and outputs the collected sound to the audio processing circuit 51, and the audio processing circuit 51 outputs the recorded audio signal to the portable computer 10. When no sound is recorded, the microphone section 5 may be omitted, or a speaker or the like may be integrated with the headset for transmitting sound or the like to the user.
[0043]
The fixed detection device 7 includes an infrared filter 71, a lens 72, a CMOS image sensor 73, and an image processing device 74. The fixed detector 7 is configured and operates in the same manner as the infrared detector 2 described above. However, the angle of view of the lens 72 is 60 degrees, and is set to be narrower than the angle of view of the lens 22 of the detection device 1. In this case, the light collection rate per pixel of the CMOS image sensor 73 is increased, and the infrared tags 4 and 6 located at a long distance can be easily found. In addition, not only the detection device 1 mounted on the head of the user, but also the fixed detection device 7 fixed to a structure constituting a space where the user is located, to detect the user and the target in the line of sight of the user. Therefore, the situation around the user can be detected from different viewpoints.
[0044]
In the present embodiment, the infrared tag 6 corresponds to an example of a light emitting device, the detecting device 1 corresponds to an example of a detecting device, the LED 61 corresponds to an example of a light emitting unit, and the driving circuit 62 corresponds to an example of a light emitting control unit. The infrared filter 21, the lens 22, and the CMOS image sensor 23 correspond to an example of a photographing unit, the image processing device 24 corresponds to an example of a light emitting device detecting unit and an identification information detecting unit, and the image photographing unit 3 corresponds to a visible light. This corresponds to an example of a photographing unit. Further, the infrared tag 4 corresponds to an example of a light emitting device for a detection device, the LED 41 corresponds to an example of a light emitting unit, and the drive circuit 42 corresponds to an example of a light emission control unit. Further, the fixed detection device 7 corresponds to an example of the fixed detection device, the infrared filter 71, the lens 72, and the CMOS image sensor 73 correspond to an example of the photographing unit, and the image processing device 74 includes the light emitting device detection unit and the identification information detection unit. Corresponds to an example.
[0045]
Next, an infrared tag detection process of the detection device 1 will be described. FIG. 3 is a flowchart for explaining the infrared tag detection processing of the detection device 1 shown in FIG. Note that the infrared tag detection process shown in FIG. 3 is a process performed by the image processing device 24 executing a detection process program stored in advance, and the same process is performed by the fixed detection device 7.
[0046]
First, the image processing device 24 initializes the CMOS image sensor 23 and the like (step S11), and captures an infrared image of the entire screen (128 × 128 pixels) (step S12). Next, the image processing device 24 extracts a light spot of a predetermined size, for example, a 1-pixel light spot, from the infrared image as the infrared tag 6 (LED 61) (step S13), and excludes a light spot larger than the predetermined size. As described above, since the infrared tag 6 can be detected by a simple process of detecting a light spot of a predetermined size from the infrared image, the infrared tag detection process by the image processing device 24 can be speeded up.
[0047]
Next, the image processing device 24 determines an 8 × 8 pixel area centered on the extracted light spot as a detection area (step S14), and the CMOS image sensor 23 sets the detection area to a predetermined number of times, for example, ((transmission bit (Number + start bit number + end bit number) × 2 × 2) times (step S15), and detects the blinking state of the infrared tag 6 from the read infrared image, detects the ID number, performs parity check, and reads. A data determination process is performed (step S16). As described above, the detection area including the light spot is determined from the infrared image, and the blinking state of the infrared tag 6 is detected using only the infrared image in the detection area. The speed of the infrared tag detection processing by the image processing device 24 can be increased. By increasing the speed of the infrared tag detection processing, it is possible to sufficiently follow the movement of a person, and it is possible to omit processing at high computation cost such as motion prediction.
[0048]
Here, if the parity check is correct (YES in step S17), the image processing device 24 outputs the ID number and the XY coordinates of the infrared tag 6 (step S18), and if the parity check is not correct (NO in step S17). Then, the process returns to step S15 to read the detection area again.
[0049]
Finally, among the light spots detected in step S13, if there is a light spot that has not been read yet (YES in step S19), the image processing device 24 continues the processing from step S14 on for the light spot. If there is no light spot that has not been read (NO in step S19), the flow returns to step S12 to repeat the infrared tag detection processing.
[0050]
As described above, in the present embodiment, the ID number uniquely assigned to the object to which the infrared tag 6 is attached is transmitted by blinking the LED 61, and the detection device 1 attached to the user transmits the ID number. An infrared image of a predetermined imaging region including an object located in the line of sight of the user is captured, and the ID number of the infrared tag 6 is detected using the captured infrared image. Can be identified.
[0051]
Here, since the infrared tag 6 can be realized by a simple configuration of blinking infrared light in accordance with the identification information of the target object, the infrared tag 6 can be reduced in size, and the detection device 1 uses an infrared image. Since the identification information of the target object is detected, it is possible to suppress the adverse effect due to light having a wavelength in the visible light region, which is a disturbance, to speed up the detection process, and to use a special high-speed camera or the like. Without using the small and inexpensive CMOS image sensor 23 or the like, the detection device 1 can be configured. Therefore, it is possible to realize an object identification system which can identify an object located in the user's line of sight, has a high processing speed, and can be reduced in size and cost so that it can be worn by a person. .
[0052]
Next, an application example of the object identification system configured as described above will be described. FIG. 4 is a schematic diagram for explaining an example of collecting an interaction corpus in an exhibition hall using the object identification system shown in FIG.
[0053]
As shown in FIG. 4, an explanation person P1 and the like wear the detection device 1 on the head and carry the portable computer 10 on their backs. The infrared tag 6 is attached to the chest of the visitor P2, and is attached to a computer M1 and a robot M2 for exhibit explanation, a stuffed toy M3 for exhibit, an exhibition explanation board B1 and the like as objects on the environment side, each of which is individually provided Is transmitted. A fixed detector 7 is attached to the ceiling or wall of the exhibition hall.
[0054]
By arranging the devices as described above, for example, the visitor P2 or the like who has entered the field of view of the explainer P1 is identified as the target by the detection device 1, and the explainer P1 is set as the target by the fixed detection device 7. At the same time, the visitor P2, the robot M2, and the like are identified as objects around the explainer P1. In this way, it is possible to collect interaction data relating to the interaction between persons in the exhibition hall, and to create an interaction corpus serving as a knowledge base from the collected data.
[0055]
In the above description, the collection of the interaction corpus has been described as an example, but the application to which the present invention can be applied is not particularly limited to the above example, and can be applied to various applications. Also, one infrared tag is attached to one object, but a plurality of infrared tags transmitting the same ID number may be provided for one object.
[0056]
【The invention's effect】
According to the present invention, a light-emitting device can be realized by a simple configuration in which infrared light is blinked in accordance with identification information assigned to an object, so that the light-emitting device can be reduced in size and the detection device Detects the identification information of an object using an infrared image, so that the adverse effect of light having a wavelength in the visible light region, which is a disturbance, is suppressed, and the detection device is configured using a small and inexpensive CMOS image sensor or the like. And an object identification system that can identify an object located in the user's line of sight, has a high processing speed, and can be reduced in size and cost so that it can be worn by a person. be able to.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an object identification system according to an embodiment of the present invention.
FIG. 2 is a schematic perspective view showing an appearance of the detection device shown in FIG.
FIG. 3 is a flowchart for explaining an infrared tag detection process of the detection device shown in FIG. 1;
FIG. 4 is a schematic diagram for explaining an example of collecting an interaction corpus in an exhibition hall using the object identification system shown in FIG. 1;
[Explanation of symbols]
1 Detector
2 Infrared detector
3 Image shooting section
4 Infrared tags
5 Microphone section
6 infrared tags
7 Fixed detector
21 Infrared filter
22 lenses
23 CMOS Image Sensor
24 Image processing device
31 lenses
32 CCD camera
41 LED
42 Drive Circuit
51 Audio processing circuit
52 microphone
61 LED
62 drive circuit
71 Infrared filter
72 lenses
73 CMOS image sensor
74 Image processing device

Claims (9)

A light-emitting device attached to the target, and a detection device attached to the user,
The light emitting device,
Light emitting means for emitting infrared light,
Light-emitting control means for blinking the light-emitting means according to the identification information uniquely assigned to the object to which the light-emitting device is attached,
The detection device,
A photographing unit having an optical axis substantially coincident with a user's line of sight, and photographing an infrared image of a predetermined photographing region including the object;
Light emitting device detecting means for detecting the light emitting device using an infrared image taken by the photographing means,
An object identification system, comprising: identification information detection means for detecting a blinking state of the light emitting device detected by the light emitting device detection means and detecting identification information of the light emitting device. 2. The object identification system according to claim 1, wherein the light emitting device detection unit detects a light spot of a predetermined size from the infrared image as the light emitting device. 3. The light emitting device detection means determines a detection area including the light spot from the infrared image,
The photographing means photographs an infrared image of the detection area,
The said identification information detection means detects the blinking state of the light emitting device detected by the said light emitting device detection means using the infrared image of the said detection area, and detects the identification information of the said light emitting device. Item 2. The object identification system according to Item 2. The image capturing means has a near-infrared transmission filter, receives near-infrared light transmitted through the near-infrared transmission filter, and captures a near-infrared image of a predetermined imaging region including the object. An object identification system according to any one of claims 1 to 3. The detection device includes: a light emitting unit that emits infrared light; and a light emission control unit that blinks the light emitting unit in accordance with identification information uniquely assigned to a user wearing the detection device. Further comprising a device,
The object identification system according to claim 1, wherein the detection device is mounted on a head of a user. Further comprising a fixed detection device fixed to a structure constituting a space where the user is located,
The fixed detector,
An imaging unit having an optical axis set in a predetermined direction, and imaging an infrared image of a predetermined imaging region including a user,
A light-emitting device detection unit that detects the light-emitting device for the detection device using an infrared image captured by the imaging unit,
Identification information detecting means for detecting the blinking state of the light emitting device for the detection device detected by the light emitting device detection means, and detecting the identification information of the light emitting device for the detection device,
6. The object identification system according to claim 5, wherein an angle of view of an imaging unit of the fixed detection device is smaller than an angle of view of an imaging unit of the detection device. The detection device further includes a visible light imaging unit having an optical axis aligned with an optical axis of the imaging unit, and imaging a visible light image in a user's line of sight.
The object detection system according to claim 1, wherein the detection device is mounted on a user's head. A light-emitting device attached to an object and detected by a detection device attached to a user,
Light emitting means for emitting infrared light,
A light-emitting device comprising: a light-emitting control unit that causes the light-emitting unit to blink in accordance with identification information uniquely assigned to an object to which the light-emitting device is attached. A detection device that is mounted on a user and detects a light emitting device attached to an object,
A photographing unit having an optical axis substantially coincident with a user's line of sight, and photographing an infrared image of a predetermined photographing region including the object;
Light emitting device detecting means for detecting the light emitting device using an infrared image taken by the photographing means,
An identification information detecting means for detecting a blinking state of the light emitting device detected by the light emitting device detecting means and detecting identification information of the light emitting device.

Images