WO2022259375A1 - Système de partage d'informations, dispositif de traitement d'image, procédé de partage d'informations et programme - Google Patents

Système de partage d'informations, dispositif de traitement d'image, procédé de partage d'informations et programme Download PDF

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Publication number
WO2022259375A1
WO2022259375A1 PCT/JP2021/021781 JP2021021781W WO2022259375A1 WO 2022259375 A1 WO2022259375 A1 WO 2022259375A1 JP 2021021781 W JP2021021781 W JP 2021021781W WO 2022259375 A1 WO2022259375 A1 WO 2022259375A1
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WIPO (PCT)
Prior art keywords
camera
video
point
information
display device
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Application number
PCT/JP2021/021781
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English (en)
Japanese (ja)
Inventor
光洋 我妻
淳 嵯峨田
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日本電信電話株式会社
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Application filed by 日本電信電話株式会社 filed Critical 日本電信電話株式会社
Priority to JP2023527212A priority Critical patent/JPWO2022259375A1/ja
Priority to PCT/JP2021/021781 priority patent/WO2022259375A1/fr
Publication of WO2022259375A1 publication Critical patent/WO2022259375A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/15—Conference systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Definitions

  • the present invention relates to a system for dialogue between remote locations.
  • Patent Document 1 There is a conventional technique for having a dialogue by installing cameras at two or more remote locations and transmitting and receiving video and audio to each other (for example, Patent Document 1). With this technology, a person at a certain location can have a dialogue with the other person while looking at the other person's face or the state of the remote location.
  • the present invention has been made in view of the above points. To provide a technology that enables appropriate sharing of information between remote locations without trouble.
  • an information sharing system for sharing information between at least a first point and a second point connected by a network, at least two cameras including a first camera and a second camera at the first point;
  • a video display device is provided at the second point, An image of a person captured by the first camera at the first location is transmitted to an image display device at the second location, and information described in the information recording medium captured by the second camera is transmitted.
  • transmitted to the video display device at the second point The frame rate of the video taken by the second camera is lower than the frame rate of the video taken by the first camera, and the resolution of the video taken by the second camera is higher than that of the first camera.
  • An information sharing system is provided that has a higher resolution than the video captured by the camera.
  • the images of people are transmitted and received, and the images of information described in information recording media are transmitted and received appropriately between remote locations without trouble. It becomes possible to share to
  • FIG. 1 is an overall configuration diagram of a communication system according to the present embodiment
  • FIG. 2 is a diagram showing a configuration example of a student-side system
  • FIG. It is a figure which shows the structural example of the teacher side system. It is a figure which shows the structural example of the teacher side system. It is a figure which shows the functional structural example of a camera. It is a figure which shows the structural example in the case of grouping. It is a figure which shows the example of time allocation in the case of grouping. It is a figure which shows the hardware configuration example of an apparatus.
  • an educational site where teachers and students are separated from each other is taken as an example, but this is just an example, and the present invention can be applied to any field.
  • the case of sharing document information handwritten on paper is taken as an example, but the present invention can also be applied to the case of using information recording media other than paper.
  • the present invention can also be applied to information sharing between two points, the present invention can also be applied to information sharing between three or more points.
  • FIG. 1 shows an example of the overall configuration of the system according to the first embodiment.
  • a student side system 100 is arranged at point A
  • a teacher side system 100 is arranged at point B.
  • Point A and point B are geographically separated, point B is remote from point A, and point A is remote from point B.
  • the side on which the student side system 100 is arranged may be called the "student side", and the side on which the teacher side system 200 is arranged may be called the "teacher side".
  • the student side at least one person who is the subject of at least one camera is called a "student”, and similarly, a person on the teacher side is called a "teacher”.
  • the student-side system may be called the student-side device, and the teacher-side system may be called the teacher-side device.
  • the location where the student-side system 100 is located is, for example, the student's home, and the location where the teacher-side system 200 is located is, for example, the classroom or the teacher's home, but is not limited to these.
  • the point A and the point B are connected via a network 300 and can transmit and receive images and data.
  • a control device 400 that controls the operation of the cameras and the like described below may be provided on the network 300 . Also, the control device 400 may be provided in the student side system 100 or in the teacher side system 200 .
  • FIG. 2 shows a configuration example of the student-side system 100.
  • the student-side system 100 has a camera 101, a camera 102, a video display device 103, and a transmission/reception device 104.
  • FIG. 1 shows a configuration example of the student-side system 100.
  • the student-side system 100 has a camera 101, a camera 102, a video display device 103, and a transmission/reception device 104.
  • the camera 101 shoots the student.
  • the camera 102 captures the surface of the paper on which the student has written with a pen, pencil, or the like.
  • the image display device 103 displays images to the students. Note that the camera 101 may be built in the image display device 103 .
  • the transmitting/receiving device 104 transmits the video (video data) captured by the cameras 101 and 102 to the teacher side via the network 300 . Also, the transmission/reception device 104 receives an image captured by the teacher via the network and transmits the image to the image display device 103 . Note that in any of the embodiments, audio is transmitted and received in addition to video, but the description is mainly focused on video.
  • the frame rate for shooting with the camera 101 is higher than the frame rate for shooting with the camera 102 .
  • the camera 101 shoots the student at a frame rate of 30 [fps], for example, and the camera 102 shoots the paper at a frame rate of 1 [fps], for example. Also, for example, the camera 102 shoots with a higher resolution than the camera 101 .
  • shooting at a certain frame rate means recording video at that frame rate.
  • the bit rate (number of bits per unit time) to be transmitted is high, so network bandwidth (network transmission volume) is higher than video shot at low resolution. ).
  • high-resolution video can be transmitted by lowering the frame rate. You can share written information in high resolution.
  • the images captured by the cameras 101 and 102 are transmitted to the teacher through the transmission/reception device 104 and the network 300, respectively. Also, an image of the teacher captured by the teacher is displayed on the image display device 103, so that the students can confirm the image of the teacher.
  • the voice of the student may be captured by the camera 101 and transmitted to the teacher through the transmission/reception device 104 and the network 300 .
  • the teacher's voice may be acquired on the teacher's side, and the teacher's voice may be output from a speaker included in the video display device 103, for example.
  • the setting of the frame rate and resolution for each camera as described above may be performed manually or automatically by the control device 400 .
  • FIG. 3 shows configuration example 1 of the teacher-side system 200 .
  • the teacher-side system 200 has a camera 201 , a video display device 203 and a transmission/reception device 204 .
  • a camera 201 photographs the teacher.
  • the image display device 203 displays images to the teacher.
  • the transmitting/receiving device 204 transmits the video captured by the camera 201 to the teacher via the network 300 .
  • the transmission/reception device 204 receives the video shot by the student via the network and transmits the video to the video display device 203 .
  • the camera 201 shoots the teacher at a frame rate of 30 [fps].
  • An image captured by the camera 201 is transmitted to the student side through the transmission/reception device 204 and the network 300 .
  • the video display device 203 on the teacher side the video of the student taken by the student and the video of the paper written by the student with a pen or pencil are displayed. You can check the video of As described above, the images on paper can display high-resolution images, so the teacher can clearly check even characters handwritten with a pencil.
  • FIG. 4 is a diagram showing configuration example 2 of the teacher-side system 100.
  • a camera 202 is provided in addition to the components of configuration example 1 (FIG. 3).
  • Camera 202 is connected to transceiver 204 .
  • the configuration is the same as configuration example 1 except that a camera 202 is provided.
  • the camera 202 takes a picture of the paper on which the teacher has written with a pen or pencil.
  • the frame rate of photography by the camera 201 is higher than the frame rate of photography by the camera 202 .
  • the camera 201 shoots the teacher at a frame rate of 30 [fps]
  • the camera 202 shoots the paper at a frame rate of 1 [fps].
  • the camera 202 shoots with a higher resolution than the camera 201 .
  • the images captured by the cameras 201 and 202 are transmitted to the student side through the transmission/reception device 204 and the network 300, respectively.
  • the video display device 103 on the student side displays the video of the teacher captured by the teacher and the video of the paper written by the teacher with a pen or pencil. The student can check the video of the teacher and the video of the paper in the teacher's hand.
  • the setting of the frame rate and resolution for each camera as described above may be performed manually or automatically by the control device 400 .
  • a specific operation example of the camera 102 on the student side and the camera 202 on the teacher side will be described.
  • the cameras 102 and 202 are collectively referred to as "camera 10".
  • the camera 10 is a camera that captures images of paper, but the cameras 101 and 201 that capture images of people may also be the cameras 10 described below.
  • the camera 10 shoots a stationary object such as a sheet of paper at a low frame rate, and transmits the low frame rate video (which may be called video data) obtained by shooting.
  • the camera 10 may transmit the photographed image as it is, or may perform processing for vertically inverting the image and transmit the image after the processing.
  • the camera 10 may detect the position of the paper to be photographed, perform perspective projection conversion, and convert only the paper portion into the original shape such as a rectangle and transmit it.
  • the receiving side can see an image of the rectangular sheet of paper as if viewed from above.
  • the camera can be freely arranged. That is, for example, even if the camera is placed diagonally in front of the transmitting side so as not to interfere with the work, the receiving side can see a rectangular image of the paper as if viewed from above.
  • the camera 10 detects the position of the underlay in advance and calculates the perspective projection transformation matrix. You can continue to send with As a result, even if the sending side puts a rectangular sheet of paper on a rectangular underlay and writes on it, even if the rectangular sheet of paper is photographed obliquely, the receiving side will see the paper as if it were viewed from above. You can see an image of a rectangular sheet of paper.
  • the above-described perspective projection conversion processing may be performed by the camera 10 on the transmitting side, may be performed by another device on the transmitting side (eg, a transmitting/receiving device), or may be performed on the receiving side (eg, transmitting/receiving device, image display device, etc.) or any device on the network 300 route.
  • Devices that perform such conversion may be collectively referred to as video processing devices.
  • the control device 400 may also serve as a video processing device.
  • the Hough transform is applied to the image to detect the straight lines at the boundary of the paper, and the coordinates of the point where the four straight lines intersect in or near the image are obtained. Then, a perspective projection transformation matrix in which each point is transformed into each rectangular point can be obtained by solving the 8-element simultaneous equations.
  • markers that can be detected by image processing are printed on paper, and the boundaries of the paper may be detected from the coordinates of the markers.
  • the boundary may be obtained by Hough transform, or the boundary may be obtained by directly detecting the color of the underlay.
  • a marker or the like that can be detected by image processing may be printed on the underlay, and the area to be detected may be calculated.
  • a marker may be printed slightly outside the place where the paper should be placed so that the position can be detected even when the paper is placed thereon, and the detection may be performed again each time the underlay moves.
  • FIG. 5 shows a configuration example of the camera 10 in this embodiment.
  • Camera 10 is a camera that can be used for any of cameras 101 , 102 , 201 and 202 .
  • the recording unit 14 is assumed to be used in Examples 2 and 3, which will be described later.
  • the camera 10 has an imaging unit 11, a conversion processing unit 12, a transmission unit 13, and a recording unit 14.
  • the imaging unit 11 acquires video according to set parameters (frame rate, resolution, etc.).
  • the conversion processing unit 12 performs, for example, the above-described conversion processing (vertical inversion processing, perspective projection conversion processing, etc.) on the video captured by the imaging unit 11 (or the video read from the recording unit 14). . Note that the conversion processing unit 12 may not execute conversion processing.
  • the transmission unit 13 transmits the video.
  • the recording unit 14 records video, reads the recorded video, and transmits it from the transmission unit 13 in response to an instruction or the like.
  • the recording unit 14 may record the video itself captured by the imaging unit 11 or may record the video after conversion by the conversion processing unit 12 .
  • the conversion processing unit 12 or the recording unit 14, or both the conversion processing unit 12 and the recording unit 14 need not be provided in the camera 10. Either the conversion processing unit 12 or the recording unit 14, or both the conversion processing unit 12 and the recording unit 14 may be provided on either the student side, the teacher side, or the network 300 as the video processing device described above. Also, the camera 10 including the conversion processing unit 12 or the recording unit 14, or both the conversion processing unit 12 and the recording unit 14 may be called a video processing device. Also, the conversion processing unit 12 or the recording unit 14 provided in the camera 10, or both the conversion processing unit 12 and the recording unit 14 may be called a video processing device, and the imaging unit 11 may be called a camera.
  • Example 1 There is already a technology that enables a person at a certain point to have a face-to-face conversation as well as voice when conversing with a person at a remote location. However, when expressing the knowledge that emerges from these conversations in diagrams and text, it is not possible to fully convey it through voice and facial expressions alone.
  • Example 2 is an example in which a plurality of people are present at at least one of the plurality of locations.
  • the overall configuration of the system in Example 2 is the same as in Example 1, as shown in FIG.
  • the teacher-side system 200 in the second embodiment there are multiple people (referred to as students) on the student side, and a student-side system 100 for multiple students is provided.
  • the configuration of the teacher-side system 200 in the second embodiment may be the same as that of the teacher-side system 200 described in the first embodiment.
  • the student-side system 100 of the second embodiment is basically the same as the configuration shown in FIG. Any one, any two, or all of them are provided in plurality. In either case, one sound collecting device may be prepared for each student.
  • one camera 101 for photographing a student may be provided for each student. Also, one or more cameras 101 may be provided that capture multiple students.
  • Each student may be provided with one camera 102 for photographing a stationary object such as a paper surface written by a student with a pencil or pen, or the camera 102 may be shared by several students, such as one for every two students. may
  • the image captured by the camera 102 at 1 [fps] continues to be transmitted. Upside-down reversal or perspective projection conversion as described in the first embodiment may be performed.
  • the captured image of the paper may be recorded in the recording unit (for example, the recording unit of the camera 102), and the student who wrote the paper may decide the timing of transmitting the image by himself.
  • each student may operate the camera 102 to instruct the recording unit to transmit an image, or may use an electronic device for instructing the camera 102 to perform an image transmission operation.
  • a student's finger touching a specific place on a piece of paper or underlay may be a video transmission instruction.
  • the camera 102 recognizes that the finger touches a specific place on the paper or underlay in the image, it instructs the recording unit to transmit the image.
  • These recording controls may also be applied in the first and third embodiments.
  • the image display device 203 in the teacher's system 200 displays images of multiple students' sheets transmitted from the student's system 100 .
  • the teacher can display the image of the paper written by a certain student on the image display device 103 in front of the student himself based on the teacher's operation, and can further add to it. .
  • You can interact with your students here. For example, only when the answer is wrong, the writing process of the part other than the answer may be displayed by the teacher's operation to check the writing process.
  • the function of performing control based on the teacher's operation as described above may be provided in the video display device 203 in the teacher-side system 200, or may be provided in a device other than the video display device 203 (for example, the control device 400). .
  • the teacher can check the answers written by the students themselves, or grade them automatically using handwriting recognition technology.
  • Handwriting recognition may be used while improving the recognition accuracy by learning the handwritten characters of individual students.
  • the function of recognizing handwriting may be provided in the video display device 203 in the teacher-side system 200, or may be provided in a device other than the video display device 203 (for example, the control device 400).
  • Example 3 Next, Example 3 will be described.
  • the system configuration of the third embodiment is the same as that of the second embodiment, a plurality of students exist on the student side, and the writings of the plurality of students are displayed on the video display device 203 of the teacher side system 200 .
  • recording is used to efficiently have a dialogue between a teacher and a student.
  • Example 3 multiple students are grouped and recording is used to efficiently create time for checking answers. Specifically, it is as follows.
  • FIG. 6 shows a system configuration example when the students are divided into groups A, B, and C.
  • the configuration of the systems 100A, 100B, and 100C of each group is the same as the configuration of the student-side system 100 described in the second embodiment.
  • the teacher gives a lesson to group A for 30 minutes, and the situation is photographed by the camera 201 and recorded by the recording unit. Recording may be performed by any recording unit on the teacher side, the student side, or on the network 300, but is performed by the recording unit of the camera 201 of the teacher system 200, for example. This allows the teacher to operate recording.
  • Group A practice for 30 minutes.
  • the image of the page is captured by the camera 102 and sent to the video display device 204 on the teacher's side for display. This allows the teacher to check the answers. While the teacher is checking the answers, the recorded video is transmitted to the group B, the group B views the video recording on the video display device, and the group B exercises at the same time as the group A finishes the exercise.
  • the teacher can check the answers of all the students in order for 90 minutes after the 30-minute class.
  • Examples 2 and 3 there may be a plurality of students on the student side and a plurality of teachers on the teacher side.
  • the configuration of the teacher system 200 in that case is the same as that of the student system 100 of the second embodiment.
  • a plurality of any two or all are provided. In either case, one sound collecting device may be prepared for each teacher.
  • multiple teachers may share the time to check the answers.
  • the teacher can collect the writings of all the students at a sufficient resolution almost in real time, and if the place to check on the paper such as the answer is specified in advance, , many answers can be checked at the same time on the screen.
  • All of the video processing device, control device, and video display device described in the first to third embodiments can be implemented by causing a computer to execute a program, for example.
  • This computer may be a physical computer or a virtual machine on the cloud.
  • the video processing device, control device, and video display device will be collectively referred to as "apparatus”.
  • the device can be realized by executing a program corresponding to the processing performed by the device using hardware resources such as a CPU and memory built into the computer.
  • the above program can be recorded in a computer-readable recording medium (portable memory, etc.), saved, or distributed. It is also possible to provide the above program through a network such as the Internet or e-mail.
  • FIG. 8 is a diagram showing a hardware configuration example of the computer.
  • the computer of FIG. 8 has a drive device 1000, an auxiliary storage device 1002, a memory device 1003, a CPU 1004, an interface device 1005, a display device 1006, an input device 1007, an output device 1008, etc., which are interconnected by a bus BS.
  • a program that implements the processing in the computer is provided by a recording medium 1001 such as a CD-ROM or memory card, for example.
  • a recording medium 1001 such as a CD-ROM or memory card
  • the program is installed from the recording medium 1001 to the auxiliary storage device 1002 via the drive device 1000 .
  • the program does not necessarily need to be installed from the recording medium 1001, and may be downloaded from another computer via the network.
  • the auxiliary storage device 1002 stores installed programs, as well as necessary files and data.
  • the memory device 1003 reads and stores the program from the auxiliary storage device 1002 when a program activation instruction is received.
  • the CPU 1004 implements functions related to the device according to programs stored in the memory device 1003 .
  • the interface device 1005 is used as an interface for connecting to a network, various measuring devices, exercise intervention devices, and the like.
  • a display device 1006 displays a GUI (Graphical User Interface) or the like by a program.
  • An input device 1007 is composed of a keyboard, a mouse, buttons, a touch panel, or the like, and is used to input various operational instructions.
  • the output device 1008 outputs the calculation result.
  • This specification discloses at least an information sharing system, a video processing device, an information sharing method, and a program according to the following items.
  • (Section 1) An information sharing system for sharing information between at least a first point and a second point connected by a network, at least two cameras including a first camera and a second camera at the first point; A video display device is provided at the second point, An image of a person captured by the first camera at the first location is transmitted to an image display device at the second location, and information described in the information recording medium captured by the second camera is transmitted.
  • the frame rate of the video taken by the second camera is lower than the frame rate of the video taken by the first camera, and the resolution of the video taken by the second camera is higher than that of the first camera.
  • An information sharing system with a higher resolution than the video captured by the camera. A plurality of persons are present at the first point, one person or one person is provided with the first camera, and one person or the plurality of persons are provided with the first camera. 2. Information sharing system according to clause 1, wherein two cameras are provided. (Section 3) The information sharing system includes a recording unit, and the recording unit records the video captured by the second camera, and based on the operation by the person at the first location, the recorded video is transmitted to the second camera.
  • the information sharing system which is transmitted to a video display device at a point.
  • the plurality of persons at the first point are divided into a plurality of groups each containing a plurality of persons, and a camera is provided at the second point, transmitting a video of a person captured by a camera at the second point to a first group at the first point for a predetermined period of time and recording the video; After the predetermined time, the recorded video is transmitted to the second group at the first point for a predetermined time, and during the predetermined time, the video display device at the second point transmits the second group at the first group. 3.
  • the information sharing system according to item 2 or 3, which receives images shot by the camera No. 2.
  • FIG. 5 A video processing device used in the information sharing system according to any one of items 1 to 4, A conversion processing unit that performs perspective projection conversion processing on the image of the information recording medium captured by the second camera so that the shape of the information recording medium looks like the shape of the information recording medium viewed from above.
  • a video processing device comprising: (Section 6) An information sharing method in an information sharing system for sharing information between at least a first point and a second point connected by a network, comprising: At least two cameras including a first camera and a second camera are provided at the first point, and a video display device is provided at the second point, An image of a person captured by the first camera at the first location is transmitted to an image display device at the second location, and information described in the information recording medium captured by the second camera is transmitted. transmitting to the video display device at the second location; The frame rate of the video captured by the second camera is lower than the frame rate of the video captured by the first camera, and the resolution of the video captured by the second camera is higher than that of the first camera. A method of information sharing that is higher than the resolution of the video captured by the camera. (Section 7) A program for causing a computer to function as a conversion processing unit in the video processing device according to item 5.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention concerne un système de partage d'informations pour partager des informations entre au moins un premier site et un second site connectés par un réseau. Au moins deux caméras, y compris une première caméra et une seconde caméra, sont prévues au niveau du premier site, et un dispositif d'affichage d'images est prévu au niveau du second site. Une image d'une personne capturée par la première caméra au niveau du premier site est transmise au dispositif d'affichage d'image au niveau du second site, et des informations écrites sur un support d'enregistrement d'informations et capturées par la seconde caméra sont transmises au dispositif d'affichage d'images au niveau du second site. La fréquence de trame d'images capturées par la seconde caméra est inférieure à celle d'images capturées par la première caméra, et la résolution d'images capturées par la seconde caméra est supérieure à celle d'images capturées par la première caméra.
PCT/JP2021/021781 2021-06-08 2021-06-08 Système de partage d'informations, dispositif de traitement d'image, procédé de partage d'informations et programme WO2022259375A1 (fr)

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PCT/JP2021/021781 WO2022259375A1 (fr) 2021-06-08 2021-06-08 Système de partage d'informations, dispositif de traitement d'image, procédé de partage d'informations et programme

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05244553A (ja) * 1991-11-11 1993-09-21 Canon Inc 画像伝送システム、画像処理装置及び端末装置
JP2013138402A (ja) * 2011-11-30 2013-07-11 Nakabayashi Co Ltd ダイアリーシステム、携帯端末装置、制御方法、及び、制御プログラム
JP2014175946A (ja) * 2013-03-11 2014-09-22 Seiko Epson Corp 撮像装置
JP2015119430A (ja) * 2013-12-20 2015-06-25 カシオ計算機株式会社 画像読み取り装置、画像読み取り方法及びプログラム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05244553A (ja) * 1991-11-11 1993-09-21 Canon Inc 画像伝送システム、画像処理装置及び端末装置
JP2013138402A (ja) * 2011-11-30 2013-07-11 Nakabayashi Co Ltd ダイアリーシステム、携帯端末装置、制御方法、及び、制御プログラム
JP2014175946A (ja) * 2013-03-11 2014-09-22 Seiko Epson Corp 撮像装置
JP2015119430A (ja) * 2013-12-20 2015-06-25 カシオ計算機株式会社 画像読み取り装置、画像読み取り方法及びプログラム

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