JP2006092370A - Activity logging apparatus, activity logging method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an activity logging apparatus capable of later accessing a variety of targets existing within actual activities. <P>SOLUTION: The activity logging apparatus 50 includes an activity content detecting means for detecting information about documents used, participants, and the content of conversations as the content of activities during cooperative work; an activity content storage means 31 for storing the content of the activities detected by the activity content detecting means, in such a way that the content is associated with the time and place that the cooperative work took place; a context creating and retaining means 32 for combining information about objects detected in the same time zone and in the same place to create information about the same context; and a context history retrieval means 33 for creating display information by taking out according to user-designated retrieval conditions the content of the activities stored in the activity content storage means 31. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an activity recording apparatus, an activity recording method, and a program.

  Conventionally, a system for supporting a conference has been proposed. The followings have been proposed as conventional techniques for supporting such a conference. The collaborative work support system of Patent Document 1 transmits information such as the storage location of a file displayed on the information display device during the conference from the information display device to the terminal device, so that the conference participant can use his / her terminal device after completion. By taking home, connecting to a network, or referring to the information with an output device connected to the network, it is possible to acquire materials during the meeting and to operate the material data.

JP 2002-49595 A

  However, in the past, activities in real work spaces were recorded as single media data such as video images, but in real-world activities, there are a variety of electronic documents, paper documents, participants, devices used, etc. However, there is a problem that these objects cannot be extracted directly only from video data. Such a problem cannot be solved by the system described in Patent Document 1.

  Therefore, the present invention has been made in view of the above problems, and provides an activity recording device, an activity recording method, and a program that can easily access various objects existing in actual activities later. With the goal.

  In order to solve the above-mentioned problem, as described in claim 1, activity content detecting means for detecting information on a document, a participant or conversation content used in a scene of collaborative work as activity content, and the activity content detecting means The activity content storing means for storing the activity content detected by the association with the time and place where the joint work was performed, and the search for specifying the activity content stored in the activity content storing means by the user It is an activity recording device provided with activity history search means for extracting and generating display information based on conditions. According to the present invention, references to various objects existing in actual activities are recorded electronically, and the user can easily access them later as needed.

  The activity recording apparatus according to the present invention further includes context generation means for generating information relating to the same context by collecting information relating to objects detected in the same time zone and in the same place, as described in claim 2, The activity content storage means holds the activity contents in units of the context generated by the context generation means, and the activity history search means searches and displays past activity contents from the activity content storage means in units of context. To do. According to the present invention, the activity history can be efficiently searched by collectively storing the activity contents in the same time zone and the same place.

  As described in claim 3, the activity recording apparatus of the present invention further requests the context generation and holding means to generate a context, and to the generated context information disclosed by the context history disclosure means. Context information acquisition means for acquiring and holding references (URI: Uniform Resource Identifiers). According to the present invention, it is possible to determine whether or not to acquire information related to the context according to the will of each individual user, and to hold the generated context information on the user side.

  As described in claim 4, the activity content detection means acquires an image captured by a still camera of content written on a whiteboard, an image captured by a video camera, or an audio recorded by a microphone. . According to the present invention, information obtained from various types of input devices installed in a work space can be recorded and stored in association with a context as activity contents, and can be reused by searching from the context history.

  As described in claim 5, the activity content detection means identifies a user using predetermined biometric authentication means (face recognition, retinal scan, hand skeleton pattern, fingerprint, etc.). According to the present invention, a user existing in a work space is detected by recognizing a biological characteristic by a sensor without carrying an ID card or a special sensing device, and time and time as participant information is detected. It can be recorded in association with a place and used when contacting participants.

  As described in claim 6, the activity content detection means identifies an electronic document used by a user for work. According to the present invention, an electronic document (for example, presentation material) used in a work space is identified and stored in association with time and place as an electronic document used in the activity. Documents used in such situations can be taken out.

  The activity content detection means may be any one of image information input by handwriting on a predetermined information processing apparatus or a comment by text and a handwritten image drawn on an interactive display. Get one. According to the present invention, a scene such as a meeting can be obtained by storing handwritten annotations, text comments, etc. input to an electronic document shared in the work space in association with time and place. You can recall the content you noticed in. Here, the predetermined information processing apparatus includes, for example, a portable device such as a PDA or a notebook PC.

  The activity recording apparatus according to the present invention, as described in claim 8, further includes an output-time ID assigning unit that assigns unique ID information to the output paper document when the paper document is output; A document image holding means for storing a document image generated when printing a paper document in a storage with the same ID as that of the paper document, and the activity content detecting means embedded in the paper document The ID information is identified, and the document image identified by the corresponding ID held by the document image holding means specified by the ID is taken out. According to the present invention, a unique ID is assigned when a paper document is output from a printer, and a document image of the paper document can be acquired via the network with the same ID. Further, by identifying the paper document used in the work space by the ID given to the paper document and storing it in association with the time and place as the paper document used in the activity, it can be used in a meeting or the like. Used documents can be retrieved.

  The activity recording apparatus according to the present invention is further characterized in that when a paper document is scanned in, an ID is assigned to the generated document image and stored in the document image holding means when the paper document is scanned in. The activity content detection means is identified by the corresponding ID held by the document image holding means by detecting the ID of the paper document given at the time of printing by the output time ID giving means. Retrieve the document image. According to the present invention, it is possible to use a copy of a document, such as a book, previously provided by a paper document.

  A plurality of the document image holding means are arranged in a distributed manner on the network as set forth in claim 10 to set a relationship between the document image holding means to constitute a peer-to-peer network, When there is a document image search request related to the document ID specified by the user, the target document image is taken out by transferring the search request between the document image holding means. According to the present invention, when searching for a document image corresponding to the detected ID, the search can be performed without being aware of the storage system in which the document image is stored, and document exchange between different organizations. Can be made possible.

  As described in claim 11, the activity content detection means acquires the ID of information published on an information presentation board installed in an actual work space. According to the present invention, the ID relating to the information being presented is transmitted, the ID is identified, stored in association with the date and time at that time, and the user can also store the date and location based on the memory. You can access it later.

  According to the present invention, an activity content detecting step for detecting information on documents, participants, and conversation content used in a collaborative work scene as activity content, and the activity content detecting step. Activity content storage step for storing the activity content in association with the time and place where the collaborative work was performed, and the activity content stored in the activity content storage step is extracted and displayed based on the specified search condition An activity recording method including an activity history search step for generating information. According to the present invention, references to various objects existing in actual activities are recorded electronically, and the user can easily access them later as needed.

  According to the present invention, as described in claim 13, an activity for storing information relating to documents, participants, and conversation contents used in a scene of collaborative work as activity contents in association with the time and place where the collaborative work was performed. A program for causing a computer to execute a content history storing step, and an activity history search step for generating display information by extracting the activity content stored in the activity content storing step based on a specified search condition. According to the present invention, references to various objects existing in actual activities are recorded electronically, and the user can easily access them later as needed.

  According to the present invention, it is possible to provide an activity recording apparatus, an activity recording method, and a program that can easily access various objects existing in an actual activity later.

  Hereinafter, the best mode for carrying out the present invention will be described. FIG. 1 is a diagram showing the configuration of a system according to the present embodiment. As shown in FIG. 1, the system 1 includes a repository server 2, a context server 3, a tablet PC 4, a wireless LAN base station 5, an infrared generator 6, a table 7 with a built-in RFID antenna, a camera (including a video camera) 8, and a microphone 9. , Speaker 10, projector 11, projection screen 12, paper document 13 with RFID tag, meeting capture server 14, RFID tag recognition server 15, multifunction device (MFP) 16, podium PC 17, ID card (RFID card) 18, bulletin board server 19, including a plasma display 20 and a network 30.

  FIG. 2 is a diagram showing the configuration of the activity recording apparatus according to the present embodiment. As shown in FIG. 2, the activity recording apparatus 50 includes a context server 3, a meeting capture server 14, an RFID tag recognition server 15, and a podium PC 17. The activity recording device 50 electronically records references to various objects existing in the actual activity so that the user can access them later if necessary. . The meeting capture server 14, the RFID tag recognition server 15, and the podium PC 17 are activity content detection means. This activity content detection means detects information relating to used documents, participants, conversation content, etc. as activity content in a joint work such as a meeting.

  The repository server 2 is a repository that stores document entities handled on various devices. In FIG. 1, a plurality of repository servers 2 are placed on the network 30. A document on the repository server 2 can be specified and retrieved by a URL. As shown in FIG. 2, the context server 3 includes an activity content storage unit 31, a context generation and holding unit 32, a context history search unit 33, an output-time ID adding unit 34, an input-time ID adding unit 35, and a document image holding unit 36. Including.

  The activity content storage means 31 performs the joint work on the activity contents (shared documents, participants, conversation contents, etc.) detected by the meeting capture server 14, the RFID recognition server 15 and the podium PC 17, which are activity content detection means. Save it in association with the time and place. The context generation and holding means 32 collects information related to the objects detected in the same time zone and the same place, and generates the information related to the same context. The activity content storage unit 31 holds the activity content in units of the context generated by the context generation and holding unit 32.

  The context history search means 33 extracts and displays the activity contents (shared documents, participants, conversation contents, etc.) stored in the activity content storage means 21 based on the search conditions designated by the user. This electronically records references to various objects present in the actual activity so that the user can later access them as needed. Further, the context history search means 33 searches and displays past activity contents from the activity content storage means 31 in units of contexts. Thereby, the activity history can be efficiently searched by storing the activity contents in the same time zone and the same place together.

  The output-time ID assigning unit 34 assigns unique ID information to the output paper document when outputting the paper document. At this time, the document image holding means 36 stores the document image generated when printing the paper document in the storage with the same ID as the output document. The RFID tag recognition server 15 as the activity content detection means identifies the ID information embedded in the paper document, and selects the document image identified by the corresponding ID held by the document image holding means 36 specified by the ID. Take out. Thus, a unique ID is assigned when a paper document is output from the printer, and a document image of the paper document can be acquired via the network with the same ID. Further, by identifying the paper document used in the work space by the ID given to the paper document and storing it in association with the time and place as the paper document used in the activity, it can be used in a meeting or the like. Used documents can be retrieved.

  The input ID assigning means 35 assigns a unique ID to the generated document image and stores it in the document image holding means 36 when the paper document is scanned in. The RFID tag recognition server 15 as the activity content detection means detects the ID of the paper document assigned at the time of printing by the output ID assignment means 34, thereby identifying the document identified by the corresponding ID held by the document image holding means 36. Take out the image. When a paper document is scanned in, a unique ID is assigned, and a document image of the paper document can be acquired via the network with the same ID. Further, the scanned and stored document is output as a paper document to which the ID is assigned, and the paper document used in the work space is identified by the ID assigned to the paper document. By storing the used paper document in association with the time and place, the document used in a meeting or the like can be taken out. This makes it possible to use a copy of a document such as a book provided in advance as a paper document.

  A plurality of document image holding means 36 are arranged in a distributed manner on the network, set a relationship between the document image holding means, constitute a peer-to-peer network, and relate to a document ID designated by the user. When there is a document image search request, a target document image may be taken out by transferring a search request between the document image holding means. In an activity record based on identification of a paper document with an ID, a document image extracted by the same ID as the ID assigned to the paper document is stored in a storage distributed on the network, and is stored for the specified ID. Can be retrieved by performing a search between them. Thereby, the RFID recognition server 15 as the activity content detection means can perform a search without being aware of the storage system in which the document image is stored when searching for the document image corresponding to the detected ID. At the same time, it enables document exchange between different organizations.

  The tablet PC 4 includes an infrared light receiving unit and a wireless antenna, and is connected to the network 30 via the wireless LAN base station 5 or a wired network. The wireless LAN base station 5 is a wireless LAN base station in the work space. The infrared ray generator 6 transmits an ID unique to the work space. The tablet PC 4 recognizes the work space by receiving the transmission ID from the infrared ray generating device 6 via the infrared ray receiving unit.

  The RFID antenna 7a built in the table 7 is connected to an RFID tag recognition server 15 arranged in each work space. RFID tags are affixed to the tablet PC 4 carried by the user, the user ID card 18 and the paper document 13. The RFID tag recognition server 15 recognizes the presence of the tablet PC 4, the RFID-tagged paper document 13, and the ID card 18 possessed by the user via the RFID antenna 7 a disposed in the work space, and uses it in the work space. The activity of a person.

  In the tablet PC 4 (context information acquisition means), the user requests the context generation / holding means 32 to generate a context via the network, and the generated context information is released by the context history search means 33. The reference (URI) of is acquired and held. Accordingly, it is possible to determine whether or not to acquire information related to the context according to the will of each individual user, and the generated context information can be held on the user side.

  In addition, the tablet PC (activity content detection means) 4 is a handwritten image drawn on an interactive large display or image information and text comments input by hand on a portable device such as the tablet PC 4 in the work space. To get. As a result, it is possible to recall the content that was noticed in a meeting or the like. A touch panel is placed on the tablet PC4 display, and handwritten image images entered using a pen are captured as if they were written on a displayed document and automatically stored as data.

  The meeting capture server 14 controls the camera (video camera) 8, the microphone 9, the speaker 110, and the like, and acquires video and audio information in the work space. This meeting capture server 14 is an image obtained by photographing the content written on the whiteboard on the wall surface with the camera 8, the video photographed by the video camera 8, or the sound recorded by the microphone 9 in the work space. To get. In this way, in the workspace, it can be obtained from various types of input devices installed in the workspace, such as images written on a whiteboard, still camera, video shot by a video camera, audio recorded by a microphone, etc. The information can be reused by searching from the context history by recording and saving the information in association with the context as the activity content. The multifunction peripheral (MFP) 16 prints the paper document 13 in response to a request from the notebook PC 4 or the like.

  The podium PC 17 is connected to the projector 11 and can project data and the like from the projector 11 onto the projection screen 12. A service for performing a slide show is installed on the podium PC 17, and the slide show service is activated via the network and projected from the projector 11. In addition, a shared document detection mechanism for detecting a document used in the presentation operates on the podium PC 17 installed in the conference room. That is, the podium PC 17 identifies electronic documents (for example, presentation materials) used in the work space, and stores them in the context server 3 in association with time and place as electronic documents used in the activity. Thus, the document used in a meeting or the like can be taken out.

  The bulletin board server 19 controls the plasma display 20. The plasma display 20 includes an infrared receiver (not shown). The bulletin board server (activity content detection means) 19 acquires the ID of information published on a plasma display (information presentation board) installed in the actual work space. Information disclosed by a plasma display (for example, an information presentation device such as a bulletin board or a guide board) 20 installed in the work space of the user's destination can be identified and stored as a personal action record. . The plasma display 20 transmits an ID related to the presented information, identifies the ID, stores it in the activity content storage means 31 in association with the date and time at that time, and stores the date and location. Based on the above, the user can access later.

  Further, the RFID tag recognition server 15 functioning as the activity detecting means described above recognizes the ID tag via the RFID antenna 7a. However, the RFID tag recognition server 15 is not limited to the face recognition, the retinal scan, and the hand skeleton. You may make it function as a biometrics authentication means which identifies a user using a pattern, a fingerprint, etc. This makes it possible to detect users who exist in the work space by recognizing biological features with sensors without carrying ID cards or special sensing devices, and respond to time and place as participant information You can use it when you want to contact participants.

  Next, a data structure processed by the software of this embodiment will be described. FIG. 3 shows the data structure of the context server 3. The software operating on the context server 3 holds “context server 101” data having the structure shown in FIG.

  FIG. 4 shows the data structure of the virtual repository. The software operating on the repository server 2 holds “repository server 111” data having the structure shown in FIG.

[Processing on the context server]
Next, processing on the context server 3 will be described. FIG. 5 is a process flowchart on the context server 3. 6A shows an object detection message 151 in the case of a document, and FIG. 6B shows an object detection message 152 in the case of a person. FIG. 7 is a diagram showing a control user interface 201 provided by the context server 3. The context server 3 includes a Web server and provides the control user interface 201 via HTTP (step S101). Using the tablet PC 4 connected to the wireless LAN, the user calls and displays the control user interface (Java applet (Java: registered trademark)) 201 provided by the context server 3 on the Web browser via the network. . The control user interface is displayed as an overview user interface as shown in FIG. The user's tablet PC 4 displaying the control user interface 201 acquires ID information from the infrared ray generator 6 installed in the work space, and recognizes the work space in which the tablet PC 4 is present.

  On the other hand, when the user presses the “context recording start” button 202 on the control user interface 201, the “context 102” having the data structure shown in FIG. 3 is generated in the context server 3, and the tablet PC 4 recognizes it. The current position ID is set to “current position ID”, and the date and time at that time is set to “start date and time” (step S102). The context server 3 receives the “object detection messages 151, 152” transmitted from the podium PC 17 and the RFID tag recognition server 15 connected to the RFID table 7, and stores the information about the document and the user included in the message. Based on this, information about the object detected in the form of “shared document 103” or “participant 104” is recorded (step S103).

  The context server 3 is always waiting to receive the object detection messages 151 and 152. When the context detection server 151 and 152 receive the object detection messages 151 and 152, the “shared document 103” and “participant” are based on the information included in the messages. 104 "data is generated and registered. When the user selects the “context recording end” button 203 on the control user interface 201 of the context server 3, the date and time at that time is set in the “end date and time” of the “context 102” (step S104).

[Search context information stored in the context server]
FIG. 8 shows a context search user interface 301 provided by the context server 3. The context server 3 includes a web server and provides a context search user interface 301 via HTTP. Using the tablet PC 4 connected to the wireless LAN, the user calls and displays a context search user interface (Java applet (Java: registered trademark)) 301 provided by the context server 3 on the Web browser. The context search user interface 301 is displayed as an overview user interface as shown in FIG.

  On the context search user interface 301, past “contexts” stored in the context server 3 can be searched based on information such as date and time, place, and participants. In FIG. 8, when the date and place are specified and the “Search” button 302 is pressed, a list of relevant contexts is displayed. A context is selected from the list, and a “context display 303” is selected from the pop-up menu. When “” is selected, the Web browser is activated and a corresponding context page (which holds “URL” of “context”) is displayed.

  Furthermore, when the user selects “e-mail 304” from the pop-up menu for the context selected on the context list provided by the context search user interface 301, the URL of the Web page related to the context is included. Allows messages to be sent to a specified destination. Here, the designated destination may be a specific user, or may be a group that can be posted as a mailing list, an online discussion system, or an electronic bulletin board such as an electronic bulletin board.

[Processing on MFD]
Next, processing on the MFD 16 will be described. FIG. 9 is a processing flowchart on the MFD 16. The document image scanned on the MFD 16 is stored on the storage provided in the MFD 16 (step S201). Then, a hash value using the document image as a key is calculated using a hash function (a cryptographic hash function such as RSA-1) (step S202), and the obtained value is used as a unique document on the network. The “document 112” of the repository server 2 is generated in association with the ID, and the ID obtained by the above calculation and the address of the document stored on the MFD 16 are registered in the “data storage destination”. (Step S203).

  A small RFID inlet is embedded in the printing paper, and when printing the scanned document image, an ID given to the document image is written by the RFID writer provided in the discharge unit of the MFD 16. . The MFD 16 holds a hash value calculated for the document image.

[Processing by shared electronic document detection mechanism of podium PC]
Next, processing of the shared electronic document detection mechanism of the podium PC 17 will be described. A shared document detection mechanism for detecting a document used in the presentation operates on the podium PC 17 installed in the conference room. When a user makes a presentation on the pedestal PC 17, the material used in the presentation is stored in the pedestal PC 17, and the document is used by using a hash function (a cryptographic hash function such as RSA-1). A hash value with an image as a key is calculated, and the obtained value is associated as a unique document ID on the network to generate “document 112” of the repository server 2, and the above calculation is performed on the “document ID”. The ID obtained in step 1 and the address of the document stored on the MFD 16 are registered in the “data storage destination”.

  Further, when a document is designated on the podium PC 17 and a document editor or a slide editor (including a slide viewer) is activated, the designated document is detected by the shared electronic document detection mechanism, and the detected electronic document is detected. Are sent to the context server 3 as object detection messages 151 and 152.

[Document search processing on repository server]
Next, processing in the repository server 2 will be described. FIG. 10 is a diagram showing a document search flow between repositories. FIG. 11 is a diagram for explaining search processing between document repositories. Each document repository holds a linkage relationship set with other document repositories. When a search request is given to the document repository together with the document ID, the “document search request” related to the corresponding document is propagated between the document repositories A to β by following the cooperative relationship between the document repositories. In FIG. 10, when receiving the “document search request”, the document repository 2C transfers the “document search request” to another document repository. Upon receiving the document search request message, the document repository searches the stored document, and when the document with the corresponding ID is found, the content of the document corresponding to the report destination included in the search request is transmitted (discovery response). ).

[Processing at Meeting Capture Server]
Next, processing in the meeting capture server 14 will be described. The meeting capture server 14 holds the current position, and transmits information related to video and audio input from the camera 8 and the microphone 9 to the context server 3 as an activity detection message. Here, when the “meeting capture start” button 204 is pressed from the control panel shown in FIG. 7 and the capture of the meeting starts, a notification of the start of the meeting capture is transmitted to the context server 3 and the data of “capture video” is stored. The date and time is set in the “start time”.

  When the “context capture end” button 205 is pressed, the current time is set in the “end time” of the “capture video”, and the address (URL) of the recorded video stored as video data in the meeting capture server 14 Is transmitted to the context server 3 as an object detection message. Here, the meeting capture server 14 includes a Web server so that the captured video image can be distributed via the network.

[Processing on RFID table]
Next, processing on the RFID table 7 will be described. Information relating to the ID recognized on the RFID table 7 is transmitted to the context server 3 as object detection messages 151 and 152. There are two types of IDs recognized on the RFID table 7, that is, an ID embedded in the ID card 18 carried by the participant and an ID embedded in the paper document 13. These IDs have unique code information and writable areas as RFID tags, and based on identification information (identification information on whether a person or a document) written in the writable area, Whether it is a paper document or not is identified.

  As described above, according to the present embodiment, references to various objects existing in actual activities are recorded electronically so that the user can access them later as needed. It is.

  The activity recording method according to the present invention is realized by the activity recording device 50. Each step is realized by installing the program from a hard disk device, a portable storage medium such as a CD-ROM, DVD or flexible disk, or downloading from a communication circuit, and the CPU executes the program, for example. The

  This program includes an activity content storing step for storing information relating to documents, participants, and conversation contents used in the scene of collaborative work as activity contents in association with the time and place where the collaborative work was performed, and the activity content storing step. The activity history search step for retrieving the activity content stored in step (b) and generating display information based on the designated search condition is executed by the computer. The context history search means 33 corresponds to the activity history search means, the context generation holding means 32 corresponds to the context generation means, and the tablet PC 4 corresponds to the context information acquisition means.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications, within the scope of the gist of the present invention described in the claims, It can be changed. It should be noted that the activity content detection means may be any device that detects information on the used documents, participants, conversation content, etc. as activity content in the joint work scene, and the RFID tag recognition server 11 and the podium PC 13 described above. It is not limited to such as.

It is a figure which shows the structure of the system by this embodiment. It is a figure which shows the structure of the activity recording device by this embodiment. It is a figure which shows the data structure of a context server. It is a figure which shows the data structure of a repository. It is a processing flowchart on a context server. (A) is a figure which shows the object detection message in the case of a document, (b) is a figure which shows the object detection message in the case of a person. It is a figure which shows the control user interface which a context server provides. It is a context search user interface provided by the context server. It is a process flowchart on MFD. It is a figure which shows the search flow of the document between repositories.

Explanation of symbols

1 System 3 Context Server 4 Tablet PC
14 Meeting capture server 15 RFID tag recognition server 17 Debut PC
31 activity content storage means 32 context generation storage means 33 context history search means 34 output ID assignment means 35 input ID assignment means 36 document image holding means 50 activity recording device

Claims (13)

Activity content detection means for detecting information on documents, participants or conversation content used in the scene of collaborative work as activity content;
Activity content storage means for storing the activity content detected by the activity content detection means in association with the time and place where the joint work was performed;
An activity recording apparatus comprising: activity history search means for extracting the activity contents stored in the activity content storage means based on a search condition designated by a user and generating display information. The activity recording apparatus further includes context generation means for collecting information on objects detected in the same time zone and at the same place, and generating the information as information on the same context,
The activity content storage means holds the activity content in units of the context generated by the context generation means,
2. The activity recording apparatus according to claim 1, wherein the activity history search means searches for and displays past activity contents in units of contexts from the activity content storage means. The activity recording apparatus further requests the context generation / holding means to generate a context, and acquires and holds a reference to the generated context information published by the context history disclosing means. The activity recording apparatus according to claim 2, further comprising: 2. The activity content detecting means acquires an image obtained by photographing a content written on a whiteboard with a still camera, an image photographed by a video camera, or an audio recorded by a microphone. Activity recording device. 2. The activity recording apparatus according to claim 1, wherein the activity content detection means identifies a user using a predetermined biometric authentication means. 2. The activity recording apparatus according to claim 1, wherein the activity content detecting means identifies an electronic document used by a user in the work. The activity content detection means acquires, in a work space, any one of image information input by handwriting on a predetermined information processing apparatus or a comment by text and a handwritten image drawn on an interactive display. The activity recording apparatus according to claim 1, wherein: The activity recording device further includes an output-time ID assigning unit that assigns ID information to the output paper document when outputting the paper document;
Document image holding means for storing a document image generated when printing the paper document in a storage with the same ID as the paper document,
The activity content detection means identifies ID information embedded in the paper document and takes out a document image identified by a corresponding ID held by a document image holding means specified by the ID. The activity recording device according to claim 1. The activity recording apparatus further includes an input-time ID assigning unit that assigns an ID to the generated document image and stores it in the document image holding unit when the paper document is scanned in;
The activity content detecting means detects the ID of a paper document given at the time of printing by the output time ID assigning means, thereby extracting the document image identified by the corresponding ID held by the document image holding means. The activity recording apparatus according to claim 8. A plurality of document image holding means are arranged in a distributed manner on the network, a relationship is set between the document image holding means, a peer-to-peer network is formed, and a document ID designated by a user is related 10. The activity recording apparatus according to claim 8, wherein when there is a document image search request, a target document image is taken out by transferring a search request between the document image holding means. 2. The activity recording apparatus according to claim 1, wherein the activity content detection means acquires an ID of information published on an information presentation board installed in an actual work space. An activity content detection step for detecting information about documents, participants, or conversation content used in the scene of collaborative work as activity content;
Activity content storage step for storing the activity content detected by the activity content detection step in association with the time and place where the joint work was performed;
An activity history search method comprising: an activity history search step for generating the display information by extracting the activity content stored in the activity content storage step based on a specified search condition. Activity content storage step for storing information relating to documents, participants, and conversation content used in the scene of collaborative work as activity content in association with the time and place where the collaborative work was performed,
A program for causing a computer to execute an activity history search step for extracting the activity content stored in the activity content storage step based on a specified search condition and generating display information.

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