JP2005157135A - Information display method, system and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform a video output in public spaces of various shapes with various screen configurations and to control an output position and size of a window smoothly to human movement. <P>SOLUTION: In an output device, an area of a virtual screen and a display area allocated from an output controller are stored in a storage means, a screen state is updated by acquiring a screen state control instruction from a screen state controller, the virtual screens is set based on a screen update instruction, content is acquired, only a set display area in the virtual screen is drawn and displayed by an instruction from the output controller. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an information display method, system, and program, and in particular, dynamically outputs content such as still images, moving images, and character information based on a command for controlling output on one or a plurality of screens. The present invention relates to an information display method, system, and program that can be changed.

  With the development of sensor technology, it has become possible to detect a natural movement of a person (see, for example, Patent Documents 1 and 2 and Non-Patent Document 1). Combining such recognition technology with information display technology has made it possible to provide new forms of information. The present invention detects a motion of a person or the like by a sensor in a large-scale public space such as a station premises or a building entrance, and provides a screen based on information output from the sensor. This is for realizing a service for changing the output.

  Examples of specific services are shown below.

・ Follow-up advertisement:
In the initial state, nothing is displayed on the large screen, but a simple background image or the like is displayed. Here, the large screen includes a plurality of output devices according to the installation location. In the example of FIG. 15, a horizontally long screen is generated using three output devices.

  The output is changed as follows according to the movement of the person.

  -When a person enters in front of the screen, an information display window pops up. Still images, moving images, character information, and the like are displayed on the window.

  -When a person moves in front of the screen, the window follows the movement.

  As described above, according to the natural movement of the person, the output position of the window on the large screen and the content to be output are dynamically changed to realize effective information provision.

In addition, the position of the person and the pointing direction can be detected from the camera image. In the prior art, there is a method of performing coordinate conversion on the position and pointing direction of the person detected in this way and determining coordinates on a screen for outputting information (see, for example, Patent Document 3).
JP 2001-43384 A "Multimedia Information Space Input Method, Input Device, Input / Output Cooperation Method, Input / Output Cooperation Device, Input Program, and Recording Medium Recording Input / Output Cooperation Program" Japanese Patent Application Laid-Open No. 2001-216527 “Multimedia Information Space Input Device and Method, and Recording Medium Recording the Program” JP 2000-55917 A Tamio Kihara, Machiko Prairie, Hiroshi Yasuda “The Art of the Place and Network Art” Information Processing Society of Japan Vol.44 No2, 2003

  However, when realizing the service as described above, the prior art has the following problems.

(1) Problems with output screen configuration:
When targeting various public spaces, for example, it is necessary to be able to flexibly create various screen configurations as shown in FIG. 16 on the installation location of the display device (display, etc.) and the projection surface that can be projected by the projector. .

  (A) For example, when using in a space where there is no obstacle between station concourses or the like, a plurality of projectors are projected side by side to form a horizontally long screen.

  (B) For example, in the case of using in a large space with an atrium, a huge screen is formed by projecting up and down and left and right with a plurality of projectors.

  (C) For example, when used in a space where a continuous projection plane cannot be obtained due to obstacles, such as in a concourse at a station, the entire screen is composed of a plurality of distant displays.

  In the above-described conventional technique, when controlling such a plurality of screen outputs, usually, a method is used in which one video is first generated and an output area is assigned to each display from the video by a dedicated hardware device or the like. However, with this method, it is difficult to flexibly switch the screen configuration as described above, and the number of displays that can be used is limited. In addition, since an area is allocated from one originally generated video, there is a problem that the resolution of the video displayed on each display is lowered.

(2) Tracking accuracy problem:
Using the current technology, the position of a person and the direction of pointing can be detected from a camera image. In the prior art, there is a method of converting the position and pointing direction of the person detected in this way and determining the coordinates on the screen for outputting information. However, there are many noises such as position detection errors. Moreover, since detection takes a certain amount of time, the detection value is a discrete value in time. Therefore, when realizing the advertisement that follows the person described above, there is a problem in that smooth follow-up cannot be realized according to the movement of the person, and the output position of the information display window is blurred. . In addition, when a large number of windows that follow a large number of people are controlled simultaneously, it is necessary to generate a large number of commands for position control.

  The present invention has been made in view of the above points, and can output video with various screen configurations to public spaces of various shapes, and can provide a smooth window for human actions. It is an object to provide an information display method, system and program capable of controlling the output position and size.

  FIG. 1 is a diagram for explaining the principle of the present invention.

The present invention relates to an information display method in a system that dynamically changes output on a screen of one or a plurality of output devices according to a control command.
A screen state control device for generating a screen state control command for performing screen state control; and
An output control device for managing the screen area displayed by the output device and performing synchronous control of the display;
A content management device for delivering content;
A screen state management unit that operates on each output device and automatically calculates the output position and size of content; an output screen generation unit that displays content while synchronizing; a content acquisition unit that acquires and manages content; On a system consisting of output devices having
In the output control device, a display area designation process (step 1) in which a virtual screen is set and a part of the area on the virtual screen is assigned to the display area of each output device;
In the output screen generating means of the output device, a display area setting process (step 2) for storing the virtual screen area and the display area allocated by the output control apparatus in the storage means;
In the screen state control device, a state control command generation process (step 3) for transmitting a screen state control command to the screen state management means of the output device based on information input from a user or acquired from a sensor;
In the screen state management means of the output device, a screen state update process (step 4) for calculating the coordinates and size of the window from the speed and acceleration and transmitting a screen update command to the output screen generation means;
In the output screen generation means of the output device, upon receiving a screen update command from the screen status management means, a virtual screen generation process (step for setting a virtual screen based on the screen update command and transmitting a content acquisition request to the content acquisition means (step 5) and
In the content acquisition unit of the output device, a content acquisition process (step 6) for requesting the content management device to acquire the content and transmitting it to the output screen generation unit;
In the output control apparatus, when a screen synchronization signal notifying that the preparation for drawing is completed is acquired from the output screen generating means, a drawing synchronization process for transmitting the screen drawing signal to the output screen generating means of the output device (step 7) When,
The output screen generating means of the output device comprises a screen drawing process (step 8) in which only the display area set in the display area setting process in the virtual screen is drawn and displayed.

Further, the present invention provides a state control instruction generation process,
The screen state control device
Creation of a window for displaying content, deletion of a window, or deletion of a window based on a user designation, sensor information, or a control instruction generated by another program
Output coordinates, movement speed, movement acceleration, size, size change speed, size change acceleration, content name, content format, or content that each window has Including a process of generating a screen state control command for acquiring or updating a property value consisting of the playback state.

Further, the present invention provides a screen state update process,
Image state management means
According to the screen state control command generated in the state control command generation process,
Generation of windows for displaying contents, deletion of windows, output coordinates of each window, movement speed, acceleration of movement, size, speed of resizing, or The process of obtaining or changing the value of the property that consists of the acceleration of the size change, the content name, the format of the content, or the playback state of the content,
Even if there is no screen state control command, the window output coordinates or the window movement speed, or the movement acceleration, or the size change speed, or the size change acceleration at regular intervals, or Calculating the size.

In the display area designation process, the present invention
The output controller is
Based on information specified by the user or automatically collected from each output device connected via the network, a virtual screen area and a virtual screen area actually displayed by each output device Including the process of
In the virtual screen generation process,
The output screen generation means
It has a virtual screen area of any size inside, arranges a window for displaying the content at an arbitrary position on the virtual screen, sets the content,
This includes a process of drawing only the designated display area in the virtual screen and displaying it on the display.

In the present invention, the drawing synchronization process
The output controller is
It includes a process of receiving a screen synchronization signal from each output device and transmitting a screen drawing signal to each output device every time when the screen synchronization signals from all the output devices are complete or a certain time elapses.

Further, the present invention provides a virtual screen generation process,
The output screen generation means
A window is arranged on a virtual screen, and immediately after the content setting is completed, a screen synchronization signal is transmitted to the output control device, the screen drawing is waited, and a drawing process is performed as soon as the screen drawing signal is received.

  FIG. 2 is a principle configuration diagram of the present invention.

The present invention is an information display system that dynamically changes the output on the screen of one or more output devices in response to a control command,
A screen state control device 10 that generates a screen state control command for performing screen state control;
An output control device 20 that performs management of a screen area displayed by the output device 100 and synchronous control of display;
A content management device 30 for distributing content;
A screen state management unit 40 that operates on each output device 100 and automatically calculates the output position and size of content, an output screen generation unit 50 that displays content in synchronization with a signal from the output control device 20, and a content And an output device 100 having content acquisition means 60 for acquiring and managing.

The screen state control device 10
Based on the specification by the user, sensor information, or control instructions generated by another program, generation of windows for displaying contents, deletion of windows, or output coordinates of each window, Or the speed of movement, acceleration of movement, size, speed of resize, acceleration of change of size, content name, content type, or content playback status Including means for generating a screen state control instruction for obtaining or updating a value;
The screen state management means 40 of the output device 100
Creates a window for displaying contents, deletes a window, or outputs coordinates, moving speed, moving acceleration, size, or size of each window according to the screen status control command A means for acquiring or changing the property value consisting of the change speed, the change acceleration of the size, the content name, the content format, or the playback state of the content;
When there is no screen state control command, the window output coordinates or the window moving speed, the moving acceleration, the size changing speed, or the size changing acceleration at a certain time, or Means for calculating the size.

Further, the output control device 20 of the present invention includes:
Based on information specified by the user or automatically collected from each output device connected via the network, a virtual screen area and a virtual screen area actually displayed by each output device Including means for performing
The output screen generation means 50
A virtual screen area of arbitrary size is held inside, a window for displaying content is placed at an arbitrary position on the virtual screen, content is set, and instructions are displayed in the virtual screen. Means for drawing only the displayed area and displaying it on the display.

Further, the output control device 20 of the present invention includes:
A screen for instructing drawing whenever a screen synchronization signal is received from each output device 100 to notify that the preparation for output has been completed and the screen synchronization signals from all the output devices 100 are available or a certain time has elapsed. Means for transmitting a drawing signal to each output device 100 is included.

The output screen generation means 50 of the present invention
A window is arranged on a virtual screen, and immediately after setting the content, a screen synchronization signal is transmitted to the output control device, the screen drawing is waited, and immediately after receiving the screen drawing signal from the output control device 20, Means for executing a drawing process;

The content management apparatus 30 of the present invention
Means for acquiring content via a database or a network when instructed in advance or specifically, and distributing the acquired content to all output devices;
The content acquisition means 60 of the output device
The content distributed in advance from the content management device is stored in the database, and is retrieved in response to the content acquisition request. If the content is not stored in the database, the content distribution request is transmitted to the content management device, Means for transferring the received content to the content requester;

The present invention is an information display program for causing an output control device in a system to dynamically change output on a screen of one or a plurality of output devices according to a control command,
Based on information specified by the user or automatically collected from each output device connected via the network, a virtual screen area and a virtual screen area actually displayed by each output device The steps of
A screen drawing signal for instructing drawing every time a screen synchronization signal is received from each output device, indicating that preparations for output have been completed, and the screen synchronization signals from all output devices are available Transmitting to each output device.

The present invention is an information display program for causing an output device in a system to dynamically change output on a screen of one or a plurality of output devices according to a control command,
A content acquisition step for acquiring and managing content;
Screen state management step that automatically calculates the output position and size of the content,
Management of a screen area displayed by the output device and an output screen generation step of displaying content while synchronizing with a signal from the output control device that performs display synchronization control are executed.

The present invention is an information display program for causing an output device in a system to dynamically change output on a screen of one or a plurality of output devices according to a control command,
A content acquisition step for acquiring and managing content;
Screen state management step that automatically calculates the output position and size of the content,
Management of a screen area displayed by the output device and an output screen generation step of displaying content while synchronizing with a signal from the output control device that performs display synchronization control are executed.

In the screen state management step of the present invention,
According to the screen state control command generated in the screen state control device that generates the screen state control command for performing the screen state control,
Generation of windows for displaying contents, deletion of windows, output coordinates of each window, movement speed, acceleration of movement, size, speed of resizing, or The step of obtaining or changing the value of the property including the acceleration of the size change, the content name, the format of the content, or the playback state of the content,
Even if there is no screen state control command, the window output coordinates or the window movement speed, or the movement acceleration, or the size change speed, or the size change acceleration at regular intervals, or And calculating a size.

In the output screen generation step of the present invention,
Having a virtual screen area of an arbitrary size inside, placing a window for displaying the content at an arbitrary position on the virtual screen, and setting the content;
Only the designated display area in the virtual screen is drawn and displayed on the display.

In the output screen generation step of the present invention,
A step of placing a window on a virtual screen, sending a screen synchronization signal to the output control device immediately after the content setting is completed, waiting for screen drawing, and performing drawing processing immediately after receiving the screen drawing signal Is executed.

In the content acquisition step,
Storing in a database content that has been distributed in advance from a content management device that distributes content;
In response to the content acquisition request, the content is extracted from the database, and if the content is not stored in the database, the content distribution request is transmitted to the content management apparatus, and the received content is transferred to the content request source. Steps are executed.

The present invention can control window output coordinates and sizes according to the actions of individuals and groups in a public space even when there are many people in the public space. For more information,
-If the number of people is less than the maximum number of windows that can be output to the screen, one window can be output for each individual.

  -When the number of people exceeds the maximum number of windows, the grouping of people is automatically performed, and the number of windows corresponding to the number of people in each group can be assigned.

  -Since the grouping is done with the speed and position database, people with similar speeds and close positions can be in the same group (those who are close but walking in the opposite direction are in the same group. Does not happen).

  -A window is preferentially assigned to a person who has a characteristic movement, such as when the whole person is moving and one person stops.

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

  FIG. 3 shows a configuration of the information display system in one embodiment of the present invention, and FIG. 4 shows a sequence diagram of processing of the information display system in one embodiment of the present invention.

  The system shown in FIG. 3 includes a plurality of output PCs (personal computers) 100, a screen state control device 10, an output control device 20, and a content management device 30.

  The output PC 100 includes a screen state management unit 40, an output screen generation unit 50, a content acquisition unit 60, a content storage database 70, and a display 80. The screen state management unit 40, the output screen generation unit 50, and the content acquisition unit 60 It is assumed that there are a plurality of (n) output PCs 100 that operate on the output PC 100.

  The screen state control device 10, the output control device 20, and the content management device 30 are each one, and may operate on the same PC or on different PCs. The processing of each device is as follows. This will be described together with each process shown in FIG.

  The screen state control device 10 executes state control command generation processing (step 10) based on input by a user or information acquired from a sensor or the like, and manages screen state control commands on all output PCs 100. To the unit 40. Here, the method for generating the screen state control command from the information acquired from the sensor or the like is not particularly limited, but an example thereof will be described later in the section of the embodiment.

  With the screen state control command, a window can be created, deleted, and a variable (hereinafter referred to as a property) of a window already output on the display 80 can be acquired and updated. The screen state control command has the following format.

<Control name>, <window ID>? , ([<Property name>, <Property value>]) *
In the above, '<a>' is a variable, '? 'Represents 0 or 1 occurrence, and' () * 'represents 0 or more repetitions.

  The “control name” is the name of the control for the screen, and “window generation” or “window deletion” or “property acquisition” or “property update” can be specified.

  “Window ID” is an identifier representing a window on the display.

  “Property name” is the name of the property.

  “Property value” is a property value.

  The window ID, property name, and property value are specified as necessary for each control.

  The variables that can be specified as property names are as follows.

・ Coordinates (x, y)
・ Coordinate velocity (vx, vy)
・ Coordinate acceleration (ax, ay)
・ Size (width, height)
・ Resize speed (v_width, v_height)
・ Resize acceleration (a_width, a_height)
・ Content name,
・ Content format (character string, still image, video, etc.)
・ Video content playback status (play, stop, reverse playback, etc.)
For example, the following screen state control instruction changes the size of the window having the window ID “W1” to (10, 10) and the coordinates to (30, 20).

Property update, W1, [Size (10, 10)] [Coordinates (30, 20)]
Further, the screen state control apparatus 10 acquires the screen state as a return value of the screen state control command. The screen state has the following format.

<State 1>, <control name>, <window ID>? , ([<Property name>, <value>]) *
Here, “state 1” has “success” or “failure”. The other items are values specified in the screen state control command itself or values assigned by the screen state management unit 40. Details will be described later in the processing of the screen state management unit 40.

  In the display area designation process (step 20), the output control device 20 designates a virtual screen area and an area actually displayed by each output PC 100 as pre-processing, and uses these pieces of information as display area designation instructions. This is transmitted to the output screen generation unit 50 on the output PC 100. Details of the display area designating process (step 20) will be described later with reference to the flowchart of FIG.

  In the drawing synchronization process (step 30), the output control device 20 acquires a screen synchronization signal notifying that preparation for drawing is completed from the output screen generation unit 50 of each output PC 100. When screen synchronization signals are received from all output PCs 100 or when a predetermined time has elapsed, screen drawing signals are transmitted to the output screen generation units 50 on all output PCs 100.

  In the pre-distribution process (step 40), the content management apparatus 30 distributes the content scheduled to be used to the content acquisition units 60 on all output PCs 100 as pre-processing. Here, the content is a character string, a still image, a moving image, or the like, and is stored in advance in the content database 90 or acquired from the network 200 at an arbitrary timing.

  In the real-time distribution process (step 50), the content management apparatus 30 receives a content distribution request from the content acquisition unit 60 and distributes the designated content to the content acquisition units 60 on all output PCs 100. Here, the content distribution request has the following format.

<File name>, <File format>, <Frame number>
Here, the “frame number” is specified only when the file format is a moving image.

  In the screen state update process (step 60), the screen state management unit 40 automatically calculates the coordinates and size of the window from the speed and acceleration, and transmits a screen update command to the output screen generation unit 50. When a screen state control command is received from the screen state control device 10, a window is generated or deleted, properties are acquired or updated, and the screen state is transmitted to the screen state control device 10. The screen state update process (step 60) is repeatedly executed in a very short time. The process of the screen state update process (step 60) will be described later with reference to FIGS.

The output screen generation unit 50 performs the virtual screen areas (x_low, x_upper, y_low, y_upper) designated in the display area designation command in the display area setting process (step 70) as preprocessing.
And the display area (x1, x2, y1, y2) of each output PC 100 is stored in the internal storage. Details of the display area designation command will be described later with reference to the flowchart of the display area designation process (step 20) in FIG.

  In the virtual screen generation process (step 80), when a screen update command is received from the screen state management unit 40, it is first confirmed whether there is a change in the output content. When there is a change in the output content, a content acquisition request is transmitted to the content acquisition unit 60 to acquire the content. Next, the window is arranged on the virtual screen with the coordinates and size specified by the screen update command, and the content is set. In this manner, when the generation of the virtual screen is completed, a screen synchronization signal is transmitted to the output control device 20. Details of the virtual screen generation process (step 80) will be described later with reference to FIG.

  In the screen drawing process (step 90), when a screen drawing signal is received from the output control device 20, only the display area set in the display area setting process (step 70) in the virtual screen is drawn and displayed on the display or projector. To do.

  The content acquisition unit 60 acquires the content from the content management device 30 and stores it in the content storage database 70 in the content storage processing (step 100) as preprocessing.

  In the content acquisition process (step 110), when a content acquisition request is received from the output screen generation unit 50, the content is acquired from the content storage database 70, or the content distribution request is transmitted to the content management device 30 to acquire the content. The content acquired in this way is transmitted to the output screen generation unit 50 by content transfer processing (step 120).

  Next, a detailed procedure of the above process will be described.

  FIG. 5 is a flowchart of the display area designation process according to the embodiment of the present invention.

  In the display area designation process (step 20) in the output control device 20, first, a virtual screen is designated, and a part of the area on the virtual screen is assigned to the display area of each output PC 100. A specific example of this process is shown in FIG.

In FIG. 9, first, the virtual screen is
(x_low, x_upper, y_low, y_upper)) = (0, 320, 0, 100)
Is specified. Next, the output PC1 and the output PC2 are
(x1, x2, y1, y2) = (0,100,20,80), (100,200,20,80)
The output PC3 is a continuous area of
(x1, x2, y1, y2) = (220,320,20,80)
The screen is configured to display a slightly distant area.

  Such allocation is performed by the following procedure.

  Step 201) The number of output PCs 100 is designated manually or automatically. Hereinafter, the number of output PCs 100 is n, and the i-th output PC 100 is represented by output PC (i). Here, the method of automatically specifying the number of output PCs 100 is not particularly limited. For example, a command for confirming the existence of the output PC 100 on the network is broadcast (or multicast), and the number of output PCs 100 that have received a reply is given. There is a method of measuring.

  Step 202) The area of the virtual screen is designated manually or automatically. Here, the area of the virtual screen is a rectangular area surrounded by (x_low, x_upper, y_low ,, y_upper).

x_low <x_upper, y_low, <y_upper
Shall be satisfied.

  Here, although the automatic designation method is not particularly limited, for example, there is a method of automatically calculating from the number of output PCs 100 or the like.

  Step 203) 0 is substituted into the variable i. Also, an empty output PC list is generated. Here, the elements of the output PC list have the following format.

<Network address>, <Display area (x1, x2, y1, y2)>
Step 204) Compare i and n. If i <n, go to Step 205, otherwise go to Step 210.

  Step 205) The network address of the output PC (i) is designated manually or automatically. Although the automatic designation method is not particularly limited, for example, there is a method of automatically setting the address of each output PC 100 that has returned in the same manner as in step 201.

  Step 206) The display area of the output PC (i) is designated manually or automatically. Here, the display area is a rectangular area surrounded by (x1, x2, y1, y2). Although the automatic designation method is not particularly limited, for example, when it is desired to configure n horizontally long displays, the automatic calculation can be performed as follows.

X1 of output PC (0) = 0
X2 of output PC (0) = width (width of display area of each display)
Y1 = 0 of output PC (0)
Y2 = height of output PC (0) (height of display area of each display)
X1 of output PC (i + 1) = x2 of output PC (i)
X2 of output PC (i + 1) = x1 + width of output PC (i + 1)
Y1 = 0 of output PC (i + 1)
Y2 = height of output PC (i + 1)
Step 207) It is determined whether the following condition is satisfied.

x_low <x1 <x2 <x_upper
y_low <y1 <y2 <y_upper
If the condition is satisfied, the process proceeds to step 208;

  Step 208) The network address and display area of the output PC (i) designated in Steps 205 and 206 are added to the output PC list.

  Step 209) Substitute i + 1 for i.

  Step 210) Substitute 0 for i.

  Step 211) Compare i and n. If i <n, go to Step 212, otherwise end.

  Step 212) The virtual screen area and the display area of the output PC (i) are transmitted as a display area designation command to the output screen generation unit 50 on the output PC having the network address designated by the output PC (i).

  Step 213) Substitute i + 1 for i.

  Next, the screen state update process (step 60) in the screen state management unit 40 will be described with reference to FIGS.

  Step 601) The time when this process was last called is acquired from the internal memory, and the difference time from the current time is substituted into t. Save the current time to internal memory.

  Step 602) It is confirmed whether or not there is an unprocessed screen state control command sent from the screen state control device 10, and if there is, go to Step 603, otherwise go to Step 618.

  Step 603) The screen state control instruction e is acquired. Here, the screen state control command has the following format as shown in the section of the screen state control device 10.

<Control name>, <window ID>, ([<property name>, <property value>]) *
Step 604) “Fail” is substituted into variable 1 indicating whether the screen state control command has been executed correctly.

  Step 605) The control name of e is confirmed. If the control name is a window generation, the process proceeds to Step 606. Otherwise, the process proceeds to Step 608.

  Step 606) The window is generated by the following steps.

  (A) A window ID that is not currently used is automatically generated.

  (B) The specified property value is set in the property specified in e.

  (C) A default value is set for a property not specified in e.

  (D) A window state w having these values is generated. Here, the window state has the following format.

<Window ID>, ([<Property name>, <Value>]) *
(E) Add w to the window state list stored in the internal memory.

  (F) Substituting n + 1 into the number n of window states stored in the internal memory.

  Step 607) If the window generation process (Step 606) is completed without any problem, "Success" is substituted for 1. If it fails, do nothing.

  Step 608) The control name of e is confirmed. If the control name is a window deletion, the process proceeds to Step 609; otherwise, the process proceeds to Step 611.

  Step 609) Delete the window state having the window ID specified in e from the internal memory. N-1 is substituted into the number n of window states stored in the internal memory.

  Step 610) If the window deletion process (Step 609) is completed without any problem, "Success" is substituted. If it fails, do nothing.

  Step 611) The control name is confirmed. If the control name is property update, the process proceeds to Step 612. Otherwise, the process proceeds to Step 614.

  Step 612) The window state w having the window ID designated by e is acquired from the internal storage. Next, the property of w is changed to the property value specified by e. The updated window state w is saved in the internal memory.

  Step 613) If the property update (Step 612) is completed without any problem, “Success” is substituted for “1”. If it fails, do nothing.

  Step 614) The control name is confirmed. If the control name is "property acquisition", the process proceeds to step 615. Otherwise, the process proceeds to step 617.

  Step 615) The window state w having the window ID designated by e is acquired from the internal memory. Next, the property value of the property designated by e is acquired from w.

  Step 616) If the property acquisition (Step 615) is completed without any problem, “Success” is substituted for “1”. If it fails, do nothing.

  Step 617) The window ID, property name, and property value acquired from the control names e and w specified in the variables l and e are transmitted to the screen state control apparatus 10 as the screen state. Here, the screen state has the following format as described in the section of the screen state control device 10.

<State 1>, <control name>, <window ID>? , ("<Property name>, <value>") *
Step 618) 0 is substituted into i.

  Step 619) Compare i with n. If i <n, go to Step 620, otherwise go to Step 631.

  Step 620) Obtain the i-th window state w of the window state list accumulated in the internal memory.

  Step 621) It is determined whether or not the coordinate acceleration (ax, ay) of w is 0. If it is 0, the process proceeds to Step 623, and if not, the process proceeds to Step 622.

  Step 622) The coordinate speed (vx, vy) of w is updated to the following value.

vx = vx + t ax
vy = vy + t ay
Step 623) It is determined whether or not the coordinate speed (vx, vy) of w is 0. If it is 0, the process proceeds to Step 625, and if not, the process proceeds to Step 624.

  Step 624) The coordinates (x, y) of w are updated to the following values.

x = x + t vx
y = y + t vy
Step 625) It is determined whether or not the resize acceleration (a_width, a_hight) of w is 0. If it is 0, the process proceeds to Step 627. Otherwise, the process proceeds to Step 626.

  Step 626) The resize speed (v_width, v_height) of w is updated to the following values.

v_width = v_width + t a_width
v_height = v_height + t a_height
Step 627) It is determined whether or not the resize speed (v_width, v_height) of w is 0. If it is 0, the process proceeds to Step 629; otherwise, the process proceeds to Step 628.

  Step 628) The size (width, height) of w is updated to the following values.

width = width + t v_width
height = height + t v_height
Step 629) Save the updated w in the window state list in the internal memory.

  Step 630) Substitute i + 1 for i.

  Step 631) A screen update command is transmitted to the output screen generation unit 50. Here, the screen update command is a list having the following elements.

<Window ID>, <Coordinate (x, y)>, <Size (width, height)>, <Content name>, <Content format>, <Playback state>
Next, virtual screen generation processing (step 80) in the output screen generation unit 50 of the output PC 100 will be described with reference to FIG.

  Step 801) A screen update command is acquired from the screen state management unit 40. As described in the section of the screen state update process (step 60), the screen update command is a list (hereinafter referred to as a window list) having elements of the following format.

<Window ID>, <Coordinate (x, y)>, <Size (width, height)>, <Content name>, <Content format>, <Playback state>
Step 802) It is determined whether the window list is not empty. If it is empty, the process proceeds to Step 813. If it is not empty, the process proceeds to Step 803.

  Step 803) The top element w of the window list is extracted.

Step 804) It is confirmed whether the window ID of w exists in the content list. If it exists, the process proceeds to Step 805, and if it does not exist, the process proceeds to Step 809. Here, each element of the content list has the following format.
<Window ID>, <Content name>, <Content format>, <Frame number>, <Content entity>
Step 805) The element c having the window ID of w is acquired from the content list.

  Step 806) It is determined whether the content name of w matches the content name of c. If they match, the process proceeds to Step 807, and if they do not match, the process proceeds to Step 809.

  Step 807) It is determined whether the content format of c is a moving image and the playback state of w is (reverse) playback. If these conditions are satisfied, the process proceeds to step 808. Otherwise, the process proceeds to step 812.

  Step 808) The frame number of the moving image is calculated. The frame number is automatically calculated from the difference between the current time and the previous call time. Update the call time of the internal memory with the current time.

  Step 809) The content acquisition request is transmitted to the content acquisition unit 60. Here, the content acquisition request has the following format.

<Content name>, <Content format>, <Frame number>
The frame number is specified only when the content format is a moving image.

  Step 810) The content entity specified in the content acquisition request is acquired.

  Step 811) The elements of the content list are updated with “window ID of w, content name of w, content format of w, frame number calculated in step 808, substance of content acquired in step 810”.

  Step 812) In the virtual screen, a window is output with the coordinates and size specified by w, and the “content entity” of the content list element having the window ID of w is set.

  Step 813) A screen synchronization signal indicating completion of generation of the virtual screen is transmitted to the output control device 20.

  Next, window output processing corresponding to a large number of people will be described.

  10 and 11 are flowcharts of the multi-person window output processing in the embodiment of the present invention.

  Step 901) The screen state control apparatus 10 sets the maximum number n of windows that can be output to the screen.

  Step 902) The number k of groups used for speed classification is set.

  Step 903) The person list L is acquired from a sensor or the like. Each element of the person list has the position and speed of the detected person. Here, a method for obtaining the person list L will be described.

  By performing image analysis processing on a captured image captured by one or a plurality of surveillance cameras, the plurality of captured images are combined, and the position, speed, acceleration, and finger of the person appearing in the surveillance area are combined. The insertion direction is detected and a person list is generated.

  In addition, by executing the RFID tag analysis process on the RFID tag ID received by one or more RFID tag receivers, the ID of the RFID tag existing in the sensing area of each receiver is obtained. The RFID tag information analysis result (time, RFID tag receiver ID, sensed RFID tag ID, position) is output as a person list.

  Step 904) It is determined whether or not | L | is smaller than the maximum number n of windows. If it is smaller, the process proceeds to Step 905. If not, the process proceeds to Step 910. Here, | X | represents the number of elements in the list X.

  Step 905) 0 is substituted for i.

  Step 906) It is determined whether i is smaller than | L |. If it is smaller, the process proceeds to Step 907, and if not, the process ends.

  Step 907) The i-th element I of the person list L is acquired.

  Step 908) The window corresponding to I is output. Here, the speed of I and the position of I are coordinate-transformed to determine the output coordinates and speed of the window on the screen.

  Step 909) i + 1 is substituted into i.

  Step 910) All elements of the person list L are classified into k clusters (Li: 0 <i <k) based on the speed. Here, although the clustering method is not particularly limited, it is assumed that elements having similar speeds are classified into the same cluster.

  Step 911) The number of assigned windows wi for each cluster Li is calculated. Here, wi is at least 1, and the total of wi is n. The allocation method will be described in detail with reference to FIG.

  Step 912) 0 is substituted for i.

  Step 913) It is confirmed whether i <k is satisfied. If it is satisfied, the process proceeds to Step 914. If not satisfied, the process is terminated.

Step 914) Classify all elements of the cluster Li into wi clusters (L _ij : 0 <j <wi) based on the position. Here, the clustering method is not particularly limited, but elements at similar positions are classified into the same cluster.

  Step 915) 0 is substituted for j.

  Step 916) It is confirmed whether j <wi is satisfied. If it is satisfied, the process proceeds to Step 917. Otherwise, the process proceeds to Step 921.

Step 917) The average speed of the elements included in L _ij is calculated.

Step 918) Calculate the average position of the elements included in L _ij .

Step 919) The window corresponding to L _ij is output. Here, the average speed and average position obtained in steps 917 and 918 are coordinate-transformed to determine the output coordinates and speed of the window on the screen.

  Step 920) Substitute j + 1 for j.

  Step 921) Substitute i + 1 for i.

  Next, the window allocation number calculation process in step 911 will be described.

  FIG. 12 is a flowchart of window allocation number calculation processing according to an embodiment of the present invention.

  Step 1101) 0 is substituted for i.

  Step 1102) It is confirmed whether i <k is satisfied, and if satisfied, the process proceeds to Step 1103, and if not satisfied, the process proceeds to Step 1106.

  Step 1103) A variable ui is calculated that indicates how many people are included in the total number of people in each cluster Li. The following formula is used for the calculation.

ui = | Li | / | L |
Step 1104) The number of allocated windows wi is calculated according to ui. The following formula is used for the calculation.

wi = 1 + [ui * (n−k)]
Here, [x] represents the integer part of x.

  Step 1105) i + 1 is substituted into i.

  Step 1106) The number of windows that are not currently allocated is calculated according to the following formula.

m = n−Σwi
Step 1107) It is determined whether m> 0 is satisfied, and if satisfied, the process proceeds to Step 1108, and if not satisfied, the process is terminated.

  Step 1108) Select i that maximizes the decimal part of ui. Here, the decimal part is obtained by ui- [ui].

  Step 1109) Substitute wi + 1 for wi.

  Step 1110) 0 is substituted into ui.

  Step 1111) Substitute m-1 for m.

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

  Hereinafter, as an explanation of the actual operation, an example in which moving image content is displayed in the information display window for the follow-up advertisement in FIG. 15 will be used. However, as shown in FIG. 9, the output screen is composed of two laterally continuous areas and one remote area.

  It is assumed that the position (x, y) of a person is obtained from a sensor such as a monitoring camera, and the coordinates (x ′, y ′) on the screen are determined by the following simple coordinate conversion.

x ′ = x / 2
y '= y / 2
In the prior art, a window is output at coordinates (x ′, y ′).

  However, it is difficult to repeat the actual position detection of a person in a very short time, and the position detection of the person becomes a discrete value in time. FIG. 13 shows an example in which the position (x, y) of such a person is detected every second and the coordinates of the window are updated each time detection is performed. FIG. 14A shows an example in which a window is output as it is at the coordinates (x ′, y ′). Here, the gray portion is the actual display area. As described above, after the window is at the same position for a certain period of time, it is output to a position slightly apart at the timing of detecting the position of the next person. As described above, in the conventional technique, the window cannot smoothly follow the position of the person.

  In the following example, it is shown that the present invention allows the person to smoothly follow the window position even when the detection of the movement of the person is a discrete value. Here, for the sake of explanation, it is assumed that the detection of a person's movement is executed every second, and the screen state update process (step 60) of each output PC is executed every 0.2 seconds.

  Further, in advance, the screen state control device 10 is programmed to automatically calculate the coordinate acceleration (ax, ay) as follows from the coordinates (x ″, y ″) on the screen calculated from the detected position of the person. It is assumed that

ax = k_1 (x'-x ")
ay = k_2 (y'-y ”)
Here, k_1 and k_2 are appropriate constants, and are here set to 0.3 and 1, respectively.

  First, as preprocessing, the following is executed.

  (1) The output control device 20 executes the display area designation process (step 20), designates the area of the virtual screen (0, 320, 0, 100), designates the display area of each output PC 100 as follows, A display area designation command is transmitted to the output screen generation unit 50 on each output PC 100.

Output PC1 display area (0, 100, 20, 80)
Output PC2 display area (100, 200, 20, 80)
Output PC3 display area (220, 320, 20, 80)
(2) The screen generation unit 50 on each output PC 100 executes a display area setting process (step 70), and sets a display area according to a display area designation command. As a result, the output area of each output PC 100 is as shown in FIG.

  (3) The content management apparatus 30 distributes the operating content (C1) to the content acquisition units 60 on all three output PCs 100 by the pre-distribution process (step 40).

  (4) The content acquisition unit 60 on each output PC 100 stores C1 in the content storage database 70 by the content storage process (step 10), and can be used in response to the content acquisition request.

  A processing procedure in the case where the position (x, y) of the person is detected every second and the corresponding coordinates (x ′, y ′) on the screen are calculated as shown in FIG. 13 will be described below.

  When a position of a new person is detected at t = 0.0, the following processing is executed.

  1. The screen state control device 10 executes state control command generation processing (step 10), and transmits the following screen state control commands to the screen state management units 40 on all three output PCs 100.

Window generation, [coordinates, (0, 35)] [coordinate speed, (50, 0)] [size, (40, 30)] [content name, C1] [content format, video] [playback state, playback]
Here, since the control name is “window generation”, the window ID is not specified. This command generates a window of size (40, 30) at the position of coordinates (0, 35) and reproduces the content C1. While there is no next screen state control command, this window is displayed. , Automatically moves at the coordinate speed (50, 0).

  2. The screen state management unit 40 on each output PC 100 executes screen state update processing (step 60), and transmits the following screen update command to the output screen generation unit 50.

W1, (0, 35), (40, 30), C1, moving image, reproduction Here, W1 is an automatically assigned window ID.

  3. The output screen generation unit 50 executes a virtual screen generation process (step 80) and transmits the following content acquisition request to the content acquisition unit 60.

C1, video, 1
4). The content acquisition unit 60 executes content acquisition processing (step 110), acquires the content entity of frame number 1 of the content (C1) stored in the content storage database 70, and outputs it by the content transfer processing (step 120). It transmits to the screen generation unit 50.

  5). The output screen generation unit 50 acquires the content entity, and outputs the content entity of the frame number 1 of C1 with the size (40, 30) designated by the designated coordinates (0, 35) on the virtual screen. As soon as the output is completed, a screen synchronization signal is transmitted to the output control device 20.

  6). The output control device 20 executes a drawing synchronization process (step 30), and when screen synchronization signals are received from the three output PCs 100, transmits the screen drawing signals to these three output PCs 100.

  7). When receiving the screen drawing command, the output screen generating unit 50 on each output PC 100 executes the screen drawing process (step 90), draws only the area set by the display area setting process (step 70), and displays the display 80. Or display on a projector. As a result, the window “1” in FIG. 14B is output.

  Steps 20 to 70 are repeatedly executed until the position of the next person is detected at t = 1.0. However, since the coordinate speed is specified as ('50', 0), the coordinates of the window move at a constant speed in this direction in the x direction. The frame number of the content in step 30 is sequentially calculated in step 808 of the virtual screen generation process (step 80), and becomes a number suitable for the calling time. As a result, windows are sequentially output at positions “2” to “5” in FIG.

  Next, when the position of a person is detected at t = 1.0, the following processing is executed.

  1. The screen state control device 10 executes state control generation processing (step 10), and transmits the following screen state control command to the screen state management unit 40 on the output PC 100.

Property acquisition, W1, [coordinates, (x, y)]
2. The screen state management unit 40 on the output PC 100 executes screen state update processing (step 60), and returns the following screen states.

Success, property acquisition, W1, [coordinates, (40, 35)]
In this way, the output coordinates of the window at the immediately preceding time can be acquired.

  3. The screen state control apparatus 10 calculates the coordinate acceleration (ax, ay) as follows.

ax = k_1 (x'-x ") = 0.3 * (60-40) = 6
ay = k_2 (y'-y ”) = 1 * (38-35) = 3
The following screen state control command is transmitted to the screen state management unit 40 on all three output PCs 100.

Property update, W1, [Coordinate acceleration, (6, 3)]
4). The screen state management unit 40 on each output PC 100 executes screen state update processing (step 60), and calculates window coordinates as follows.

vx = vx + t ax = 50 + 0.2 * 6 = 51.2
vy = vy + tay = 0 + 0.2 * 3 = 0.6
x = x + t vx = 40 + 0.2 * 51.2 = 50.2
y = y + t vy = 35 + 0.2 * 0.6 = 35.1
Here, since the calling interval of the screen state update process (step 60) is 0.2 seconds as described above, t = 0.2.

  Next, the following screen update command is transmitted to the output screen generation unit 50.

W1, (50.2,35.1), (40,30), C1, video, playback The same processing as in steps 30 to 70 at t = 0.0 is performed, and the display area assigned to each output PC 100 is drawn.

  Steps 40 and 50 are repeatedly executed until the position of the next person is detected at t = 2.0. Therefore, the window moves at the equivalent speed (6, 3) until the next sensor information comes. As a result, “6” to “10” in FIG. 14B are output. Thereafter, every time the position of the next person is detected every second, the same processing as when the position of the person is detected at t = 1.0 is repeatedly executed. The output coordinates thus calculated are shown in FIG. 13 (x ″, y ″), and the actual output position is shown in FIG.

  As described above, even when the position of the person detected by the sensor is a discrete value, it is possible to complement the gap and smoothly follow the window. Further, even in a complicated screen configuration such as a continuous screen or a distant screen, the output can be performed by considering only the coordinates on the virtual screen without considering these configurations.

  Next, it will be described that the problem of the output screen configuration described above has been solved.

  In the present invention, each output PC can generate a virtual large screen in synchronization and display only a designated area. There is no limit on the number of output PCs. Accordingly, various screen configurations such as a horizontally long screen, a large screen, and a remote screen can be realized by a simple operation such as designation of a display area. In addition, since the output video of one PC is not divided, it is possible to output at the maximum resolution of each output PC. Therefore, in the present invention, it is possible to generate a large screen having various configurations with very high resolution.

  Further, regarding the problem of the tracking system described above, in the present invention, the information display window can be controlled not only by coordinates but also by speed and acceleration. Therefore, even when the position acquisition of a person is a discrete value, the output position during that time can be complemented by performing control using speed and acceleration. Therefore, it is possible to move the window smoothly. Further, the output coordinates of the window can be automatically calculated without the screen state control command. Therefore, even when many windows are controlled simultaneously, it is not necessary to generate a large number of control commands for designating coordinates one by one, and real-time dynamic control can be realized.

  Further, the operation in each device of the sequence chart shown in FIG. 4 and the operations in FIGS. 5 to 8 and 10 to 12 are respectively constructed as programs, and the image state control device, the output control device, and the content management It can be installed in a computer used as a device and an output device, executed by a control means such as a CPU, or distributed via a network.

  Further, the constructed program is stored in a portable storage medium such as a hard disk, a flexible disk, or a CD-ROM connected to a computer used as an image state control device, an output control device, a content management device, and an output device. It can also be installed and executed.

  The present invention is not limited to the above-described embodiments and examples, and various modifications and applications are possible within the scope of the claims.

  The present invention can be applied to a system that displays an advertisement according to the action of a person or the like in a large-scale public space such as a station premises or a building entrance.

It is a figure for demonstrating the principle of this invention. It is a principle block diagram of this invention. It is a block diagram of the information display system in one embodiment of this invention. It is a sequence diagram of a process of the information display system in one embodiment of the present invention. It is a flowchart of the display area designation | designated process in one embodiment of this invention. It is a flowchart of the screen state update process in one embodiment of this invention. It is a flowchart of the screen state update process in one embodiment of this invention. It is a flowchart of the virtual screen generation process in one embodiment of the present invention. It is the display area of the virtual screen and each output PC in one embodiment of the present invention. It is a flowchart (the 1) of the multi-person corresponding window output process in one embodiment of this invention. It is a flowchart (the 2) of the multi-person corresponding window output process in one embodiment of this invention. It is a flowchart of the window allocation number calculation process in one embodiment of the present invention. It is a comparison of the window output coordinate of one Example of this invention. It is a comparison of the window output position of one Example of this invention. It is a figure which shows a following advertisement. It is a figure which shows various screen structures.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Screen state control apparatus 20 Output control apparatus 30 Content management apparatus 40 Screen state management means, Screen state management part 50 Output screen generation means, Output screen generation part 60 Content acquisition means, Content acquisition part 70 Content storage database 80 Display 90 Content database 100 output device, output PC
200 network

Claims (19)

In an information display method in a system that dynamically changes output on a screen of one or a plurality of output devices according to a control command,
A screen state control device for generating a screen state control command for performing screen state control; and
An output control device that performs management of a screen area displayed by the output device, and synchronous control of display;
A content management device for delivering content;
A screen state management unit that operates on each output device and automatically calculates the output position and size of content; an output screen generation unit that displays content while synchronizing; a content acquisition unit that acquires and manages content; On a system consisting of output devices having
In the output control device, setting a virtual screen, a display area designation process of assigning a partial area on the virtual screen to the display area of each output device,
In the output screen generating means of the output device, a display area setting process for storing the virtual screen area and the display area allocated by the output control apparatus in a storage means,
In the screen state control device, a state control command generation step of transmitting the screen state control command to the screen state management means of the output device based on information input from a user or acquired from a sensor,
In the screen state management means of the output device, the screen state update process of calculating the coordinates and size of the window from the speed and acceleration, and transmitting a screen update command to the output screen generation means,
In the output screen generation means of the output device, when the screen update command is received from the screen status management means, a virtual screen is set based on the screen update command and a content acquisition request is transmitted to the content acquisition means Generation process,
In the content acquisition unit of the output device, a content acquisition process of requesting the content management device, acquiring content, and transmitting the content to the output screen generation unit;
In the output control device, a drawing synchronization process of transmitting a screen drawing signal to the output screen generating unit of the output device upon acquiring a screen synchronization signal notifying that the preparation for drawing is completed from the output screen generating unit When,
An information display method comprising: a screen drawing process for drawing and displaying only a display area set in the display area setting process in the virtual screen in the output screen generating means of the output device. In the state control command generation process,
The screen state control device
Creation of a window for displaying content, deletion of a window, or deletion of a window based on a user designation, sensor information, or a control instruction generated by another program
Output coordinates, movement speed, movement acceleration, size, size change speed, size change acceleration, content name, content format, or content that each window has The information display method according to claim 1, further comprising a step of generating the screen state control command for acquiring or updating a property value including the playback state. In the screen state update process,
The screen state management means is
According to the screen state control command generated in the state control command generation process,
Generation of windows for displaying contents, deletion of windows, output coordinates of each window, movement speed, acceleration of movement, size, speed of resizing, or The process of obtaining or changing the value of the property that consists of the acceleration of the size change, the content name, the format of the content, or the playback state of the content,
Even in the absence of the screen state control command, the window output coordinates, or the window movement speed, the movement acceleration, the size change speed, or the size change acceleration at a certain time interval, or The method for displaying information according to claim 2, further comprising: calculating a size. In the display area designation process,
The output control device is
Based on information specified by the user or automatically collected from each output device connected via the network, a virtual screen area and a virtual screen area actually displayed by each output device Including the process of
In the virtual screen generation process,
The output screen generating means
It has a virtual screen area of any size inside, arranges a window for displaying the content at an arbitrary position on the virtual screen, sets the content,
2. The information display method according to claim 1, further comprising a step of drawing only a designated display area in the virtual screen and displaying the drawn display area on the display. In the drawing synchronization process,
The output control means is
Receiving the screen synchronization signal from each output device, and transmitting the screen drawing signal to each output device every time when the screen synchronization signals from all the output devices are complete or a certain time elapses. Item 1. An information display method according to Item 1. In the virtual screen generation process,
The output screen generating means
A window is arranged on the virtual screen, and immediately after the content setting is completed, a screen synchronization signal is transmitted to the output control device, a screen drawing is waited, and a drawing process is performed as soon as the screen drawing signal is received. The information display method according to claim 4, wherein: An information display system that dynamically changes output on a screen of one or a plurality of output devices according to a control command,
A screen state control device for generating a screen state control command for performing screen state control; and
An output control device that performs management of a screen area displayed by the output device, and synchronous control of display;
A content management device for delivering content;
A screen state management unit that operates on each output device and automatically calculates the output position and size of the content, an output screen generation unit that displays the content in synchronization with the signal from the output control device, An information display system comprising: an output device having content acquisition means for performing management. The screen state control device
Based on the specification by the user, sensor information, or control instructions generated by another program, generation of windows for displaying contents, deletion of windows, or output coordinates of each window, Or the speed of movement, acceleration of movement, size, speed of resize, acceleration of change of size, content name, content type, or content playback status Including means for generating a screen state control instruction for obtaining or updating a value;
The screen state management means of the output device includes:
According to the screen state control instruction, generation of a window for displaying content, deletion of a window, output coordinates, movement speed, movement acceleration, size, or A means for obtaining or changing a property value including a size change speed, a size change acceleration, a content name, a content format, or a content playback state;
In the absence of the screen state control command, the window output coordinates, or the window moving speed, the moving acceleration, the size changing speed, or the size changing acceleration at a certain time interval, or The information display system according to claim 7, further comprising: means for calculating a size. The output control device includes:
Based on information specified by the user or automatically collected from each output device connected via the network, a virtual screen area and a virtual screen area actually displayed by each output device Including means for performing
The output screen generation means includes
A virtual screen area of an arbitrary size is held inside, a window for displaying content is placed at an arbitrary position on the virtual screen, content is set, and the virtual screen is displayed. The information display system according to claim 7, further comprising means for drawing only the designated display area and displaying it on the display. The output control device includes:
A screen drawing signal for instructing drawing every time a screen synchronization signal is received from each output device, indicating that preparations for output have been completed, and the screen synchronization signals from all output devices are available The information display system according to claim 7, further comprising means for transmitting the information to each output device. The output screen generation means includes
Place a window on a virtual screen, immediately after setting the content, send a screen synchronization signal to the output control device, wait for screen drawing, and immediately after receiving the screen drawing signal from the output control device, The information display system according to claim 9, further comprising means for executing a drawing process. The content management device includes:
Means for acquiring content via a database or a network when instructed in advance or specifically, and distributing the acquired content to all output devices;
The content acquisition unit of the output device includes:
The content distributed in advance from the content management device is stored in a database, retrieved in response to a content acquisition request, and if the content is not stored in the database, a content distribution request is transmitted to the content management device. 8. The information display system according to claim 7, further comprising means for transferring the received content to a content request source. An information display program for causing a screen state control device in a system to dynamically change output on a screen of one or a plurality of output devices in response to a control command,
Creation of a window for displaying content, deletion of a window, or deletion of a window based on a user designation, sensor information, or a control instruction generated by another program
Output coordinates, movement speed, movement acceleration, size, size change speed, size change acceleration, content name, content format, or content that each window has An information display program for executing the step of generating the screen state control command for acquiring or updating a property value consisting of the playback state. An information display program for causing an output control device in a system to dynamically change output on a screen of one or a plurality of output devices according to a control command,
Based on information specified by the user or automatically collected from each output device connected via the network, a virtual screen area and a virtual screen area actually displayed by each output device The steps of
A screen drawing signal for instructing drawing every time a screen synchronization signal is received from each output device, indicating that preparations for output have been completed, and the screen synchronization signals from all output devices are available Transmitting the information to each output device. An information display program for causing an output device in a system to dynamically change output on a screen of one or a plurality of output devices according to a control command,
A content acquisition step for acquiring and managing content;
Screen state management step that automatically calculates the output position and size of the content,
An information display program that executes management of a screen area displayed by an output device and an output screen generation step of displaying content while synchronizing with a signal from an output control device that performs display synchronization control . In the screen state management step,
In accordance with the screen state control command generated in the screen state control device that generates a screen state control command for performing screen state control,
Generation of windows for displaying contents, deletion of windows, output coordinates of each window, movement speed, acceleration of movement, size, speed of resizing, or The step of obtaining or changing the value of the property including the acceleration of the size change, the content name, the format of the content, or the playback state of the content,
Even in the absence of the screen state control command, the window output coordinates, or the window movement speed, the movement acceleration, the size change speed, or the size change acceleration at a certain time interval, or The information display program according to claim 15, further comprising: calculating a size. In the output screen generation step,
Having a virtual screen area of an arbitrary size inside, placing a window for displaying the content at an arbitrary position on the virtual screen, and setting the content;
The information display program according to claim 15, wherein only the designated display area in the virtual screen is drawn and displayed on a display. In the output screen generation step,
A window is arranged on the virtual screen, and immediately after the content setting is completed, a screen synchronization signal is transmitted to the output control device, a screen drawing is waited, and a drawing process is performed as soon as the screen drawing signal is received. The information display program according to claim 16, which causes a step of performing In the content acquisition step,
Storing in a database content that has been distributed in advance from a content management device that distributes content;
In response to a content acquisition request, the content is extracted from the database, and if the content is not stored in the database, a content distribution request is transmitted to the content management device, and the received content is transferred to the content request source The information display program according to claim 15, wherein the information display program is executed.

Images