JP2017224985A - Information processing apparatus, electronic blackboard, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information processing apparatus that can display a plurality of videos.SOLUTION: An information processing apparatus 2 displays input videos on a display 3, and comprises: receiving means 22 that receives an input of information on the position of an indicator on the display; area selection receiving means 32 that receives selection of an area in the display on the basis of the position information; and video display means 31 that displays, of the plurality of videos, a first video outside the area and displays a second video inside the area.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an information processing apparatus, an electronic blackboard, and a program.

  A display such as a liquid crystal panel, a coordinate detection device that detects coordinates on the display instructed by a user using an indicator such as an electronic pen, and a stroke that is handwritten based on coordinate data output from the coordinate detection device Electronic blackboards equipped with a control device for drawing and displaying are widely used.

  The electronic blackboard has a function of communicating with a terminal such as a PC (Personal Computer) or a tablet terminal, and the electronic blackboard can transmit an image drawn on the display of the electronic blackboard to the terminal. However, since the display of the terminal is smaller than the display of the electronic blackboard, it may be difficult to see the image as it is.

  Then, dividing | segmenting a screen for every area | region and considering transmitting to an external terminal is examined (for example, refer patent document 1). In Patent Document 1, for example, when a teacher transmits image data divided to a student's terminal, a line for the teacher to divide an image handwritten on the electronic blackboard is drawn, and each divided area divided by the dividing line is sequentially ordered. A technique for transmitting data is disclosed. As a result, the teacher can display images on the student terminal in the order of the information written on the electronic blackboard.

  However, Patent Document 1 has a problem that the electronic blackboard cannot display a plurality of images. For example, an electronic blackboard has a function of acquiring video displayed on a terminal and displaying it on a display, but when a plurality of terminals are connected, a plurality of videos are input. However, since there is only one display, the conventional technique can display only one of the plurality of images.

  In view of the above problems, an object of the present invention is to provide an information processing apparatus capable of displaying a plurality of videos.

  The present invention is an information processing apparatus that displays an input video on a display device, and includes a receiving unit that receives an input of position information of a pointer on the display device, and a display unit in the display device based on the position information. Area selection receiving means for receiving selection of the area; and video display means for displaying a first video out of the area and displaying a second video in the area.

  An information processing apparatus capable of displaying a plurality of videos can be provided.

It is an example of the figure explaining the schematic characteristic of an electronic blackboard. It is an example of the whole block diagram of an electronic blackboard system. It is an example of the hardware block diagram of an electronic blackboard. It is an example of the functional block diagram which shows the function of an electronic blackboard. It is an example of the flowchart figure which shows the procedure in which an electronic blackboard displays a some image | video on a display simultaneously. It is an example of the figure explaining selection of multiple video display mode. It is an example of the figure explaining UI image for receiving selection of a video input source. It is an example of the figure explaining the detection of a division area. It is an example of the figure which illustrates the coordinate which forms a stroke typically. It is a figure which shows typically the image | video with which the image | video of PC-2 was superimposed on the image | video of PC-1. It is an example of the figure explaining trimming of an image | video. It is an example of the flowchart figure which shows the procedure in which an image acquisition part superimposes and displays a some image | video. It is an example of the sequence diagram which shows the flow of a user's operation and the whole operation | movement of an electronic blackboard. It is an example of the figure explaining the trimming by an electronic blackboard, and the superimposition of a some image | video. It is an example of the flowchart figure which shows the procedure in which an image acquisition part superimposes and displays a some image | video. It is an example of the figure explaining the reduced image | video displayed by superimposing on the original image | video. It is an example of the figure explaining the reduction | restoration image | video at the time of reducing so that all each of a X direction and a Y direction may be included. It is an example of the flowchart figure which shows the procedure in which an image acquisition part superimposes and displays a some image | video. It is an example of the figure explaining the coordinate system of a display and a division area. It is an example of the figure explaining adjustment of a reduction position. It is an example of the adjustment screen which receives the adjustment of the X direction of a reduced image. It is a figure which shows an example of the selection screen of the display method of a some image | video.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is an example of a diagram illustrating schematic features of the electronic blackboard 2 of the present embodiment. As shown in FIG. 1A, images P1 and P2 are input to the electronic blackboard 2, but the electronic blackboard 2 displays the video P1 on a display 3 that is a display device.

  In this state, the user draws a stroke using a light emission indicator 100a such as an electronic pen and selects an arbitrary region. As shown in FIG. 1B, the user selects the divided area 50 with an arbitrary block line.

  When the divided area 50 is selected, the electronic blackboard 2 displays the video P2 in the divided area 50 and displays the video P1 outside the divided area 50. Accordingly, the video P1 is displayed on the display 3, and the video P2 is simultaneously displayed in the divided area 50 of the video P1.

  As described above, the electronic blackboard 2 according to the present embodiment receives the selection of the divided area 50 from the stroke drawn by the user and displays another video in the divided area 50, so that a plurality of videos can be simultaneously displayed with a free layout. Can do.

<Terminology>
Video refers to the shape and appearance of what is projected by light. Sometimes called an image. The video may be a still image or a video.

  The position information is information having a function for specifying the position. For example, it can be expressed by coordinates, pixel positions, distance from a standard, and the like.

  A region refers to a partitioned range. Or it refers to a part of the whole thing that has a spread. In the present embodiment, the term “divided area” will be used.

<System configuration example>
FIG. 2 is an example of an overall configuration diagram of the electronic blackboard system 500. As shown in FIG. 1, the electronic blackboard system 500 includes one or more electronic blackboards 2, a light emitting indicator 100a such as an electronic pen, a USB memory 5, a PC (Personal Computer) 6, a video conference terminal 7, and It has PC4. A PC 6 and a video conference terminal 7 are connected to the electronic blackboard 2 by signal lines for transmitting video. The electronic blackboard 2 is connected to a communication network 9, and the other electronic blackboard 2 and the PC 4 are connected to an arbitrary electronic blackboard 2 via the communication network 9.

  Each of the plurality of electronic blackboards 2 has a display 3. In addition, the electronic blackboard 2 can display on the display 3 an image drawn by an event (touch of the pen tip of the electronic pen or the pen butt of the electronic pen on the display 3) generated by the light emission indicator 100a. . It should be noted that not only the electronic pen but also a user's hand or the like (hereinafter referred to as the non-light emitting indicator 100b. If not distinguished from the light emitting indicator 100a, it is simply referred to as the indicator 100) (enlargement, reduction, page turning, etc.). The image displayed on the display 3 can be changed based on the gesture.

  Further, the user can connect a portable memory such as a USB memory 5 to the electronic blackboard 2, and the electronic blackboard 2 reads an electronic file such as a PDF from the USB memory 5 or records an electronic file in the USB memory 5. be able to. The electronic blackboard 2 is connected to a PC 6 via a cable capable of communication according to standards such as Display Port (registered trademark), DVI, HDMI (registered trademark), and VGA. As will be described later, a plurality of PCs 6 can be connected to the electronic blackboard 2.

  In addition, the electronic blackboard 2 transmits event information indicating an event by the indicator 100 to the display 3 to the PC 6 in the same manner as an event from an input device such as a mouse or a keyboard.

  Similarly, a video conference terminal 7 is connected to the electronic blackboard 2 via a cable capable of communication according to the above standards. The PC 6 and the video conference terminal 7 may communicate with the electronic blackboard 2 by wireless communication complying with various wireless communication protocols such as Bluetooth (registered trademark).

  On the other hand, the electronic blackboard 2 provided with the display 3, the light emission indicator 100 a, the USB memory 5, the PC 6, and the video conference terminal 7 may also be used at other sites where other electronic blackboards 2 are installed. The video displayed on the display 3 by the electronic blackboard 2 at one site can be displayed on the display 3 by the other electronic blackboard 2. In addition, an event that occurs on the electronic blackboard 2 at one base is transmitted to the other electronic blackboard 2. Therefore, when the image displayed on the display 3 of the electronic blackboard 2 at one site is changed based on the event generated by the user with the indicator 100, the event is transmitted to the electronic blackboard 2 at the other site and the electronic blackboard 2 is transmitted. The video on the display 3 is also changed.

  Thus, the electronic blackboard system 500 can perform remote sharing processing for sharing the same image at a remote location.

  FIG. 3 is an example of a hardware configuration diagram of the electronic blackboard 2. As shown in FIG. 3, the electronic blackboard 2 includes a CPU 101 that controls the operation of the electronic blackboard 2 as a whole, a ROM 102 that stores a program used to drive a CPU such as an IPL, and a RAM 103 that is used as a work area for the CPU 101. A network controller 105 that controls communication with the communication network 9 and an external storage controller 106 that controls communication with the USB memory 5 are provided.

  The electronic blackboard 2 also has an external video interface 111 that captures a still image or a moving image displayed on the display of the PC 6 by the PC 6. In addition, the GPU 112 that specializes in graphics (image processing of a screen displayed on the display 3), and a display controller 113 that controls and manages screen display in order to output video from the GPU 112 to the display 3 and the video conference terminal 7. It has.

  Furthermore, the electronic blackboard 2 includes a sensor controller 114 that controls processing of the touch panel, and a touch panel 115 that detects that the indicator 100 is in contact with the display 3. The electronic blackboard 2 includes an electronic pen controller 116. The electronic pen controller 116 determines whether or not the pen tip of the light emission indicator 100a or the touch of the pen bottom touches the display 3 by communicating with the light emission indicator 100a. Note that the electronic pen controller 116 may determine whether or not the user grips the light emitting indicator 100a, or the other light emitting indicator 100a, in addition to the pen tip and the pen butt, and the presence or pressure of the other light emitting indicator 100a. .

  Further, the electronic blackboard 2 includes a CPU 101, ROM 102, RAM 103, network controller 105, external storage controller 106, external video interface 111, GPU 112, sensor controller 114, and electronic pen controller 116 as shown in FIG. A bus line 120 such as an address bus or a data bus is provided.

<About the functions of the electronic blackboard 2>
The function of the electronic blackboard 2 will be described with reference to FIG. FIG. 4 is an example of a functional block diagram showing functions of the electronic blackboard 2. The electronic blackboard 2 is roughly composed of both a client unit 20 and a server unit 90. The client unit 20 and the server unit 90 are functions realized in one housing of the electronic blackboard 2.

  The server unit 90 is a function that is effective when the electronic blackboard 2 operates as a server that holds a meeting. The server unit 90 transmits various data to other electronic blackboards 2 and receives various information from the electronic blackboards 2 participating in the conference. When the server unit 90 is not valid, the client unit 20 communicates with the server unit 90 of another electronic blackboard 2.

  The client unit 20 includes a video acquisition unit 21, a coordinate detection unit 22, an automatic adjustment unit 23, a contact detection unit 24, an event distribution unit 25, an operation processing unit 26, a gesture processing unit 27, a video superimposing unit 28, and an image processing unit 30. And a communication control unit 60.

  Among these, the video acquisition unit 21 acquires the video of the video output device (in this embodiment, the PC 6) connected to the cable 10. When the image acquisition unit 21 receives an image signal from the image output device, the image acquisition unit 21 analyzes the image signal and analyzes the resolution of the image frame that is a display image of the image output device formed by the image signal, and the update frequency of the image frame. Such image information is derived and output to the image acquisition unit 31.

  The coordinate detection unit 22 detects the coordinate position of an event (such as an operation that the user's hand touches on the display 3) generated by the non-light emitting indicator 100 b on the display 3. The coordinate detection unit 22 also detects the touched area.

  The automatic adjustment unit 23 is activated when the electronic blackboard 2 is activated (may be expressed as restarting), and coordinates that detect coordinates by an optical sensor method so that the coordinate detection unit 22 can output an appropriate value. The detection unit 22 adjusts parameters when processing the image of the sensor camera.

  The contact detection unit 24 detects an event (such as an operation in which the pen tip of the light emission indicator 100a or the pen buttocks of the light emission indicator 100a is pressed (touched) on the display 3) generated by the light emission indicator 100a.

  The event distribution unit 25 distributes the coordinate position of the event detected by the coordinate detection unit 22 and the detection result detected by the contact detection unit 24 to each event of stroke drawing, UI operation, and gesture operation. Here, in “stroke drawing”, the user presses the light emission indicator 100 a on the display 3, moves the light emission indicator 100 a in this pressed state, and finally releases the light emission indicator 100 a from the display 3. Event. By this stroke drawing, for example, alphabets “S” and “T” are drawn on the display 3.

  “UI operation” is an event in which the user presses a predetermined position with the indicator 100. By this UI operation, for example, the color or width of a line drawn by the light emission indicator 100a is set. The “gesture operation” is an event in which the user touches or moves the display 3 with the non-light emitting indicator 100b. By this gesture operation, for example, when the user moves the display 3 while touching the non-light emitting indicator 100b, the image can be enlarged (or reduced), the display area can be changed, or the page can be switched. it can.

  The operation processing unit 26 executes various operations according to the UI element in which the event is generated, from what is determined as the UI operation by the event distribution unit 25. Examples of the UI element include a button, a list, a check box, and a text box. The gesture processing unit 27 performs an operation corresponding to the gesture determined by the event distribution unit 25 as a gesture operation.

  The video superimposing unit 28 displays the image superimposed by the display superimposing unit 36 described later on the display unit 29 as a video. The display unit 29 shows a display function realized by the display 3. In addition, the video superimposing unit 28 performs picture-in-picture on the video sent from another video output device (such as the video conference terminal 7) with respect to the video from the video output device (such as the PC 6). Further, the video superimposing unit 28 performs switching for displaying the video that is picture-in-picture and displayed on a part of the display unit 29 on the entire display unit 29.

  The image processing unit 30 performs layer superimposition processing and the like using each of the stroke image, UI image, video from the PC 6, and background image (plain color, grid display, etc.) as layers. The image processing unit 30 includes an image acquisition unit 31, a stroke processing unit 32, a UI image generation unit 33, a background generation unit 34, a layout management unit 35, a display superimposition unit 36, a page processing unit 37, a file processing unit 40, page data. A storage unit 300 is included.

  Among these, the image acquisition unit 31 acquires each frame as an image from the video acquired by the video acquisition unit 21. The image acquisition unit 31 has a function of outputting the image data to the page processing unit 37 in accordance with an instruction from a user or the like. The page processing unit 37 stores the image captured from the video in the page data storage unit 300. This image corresponds to a video from the PC 6. In addition, when a plurality of PCs 6 (hereinafter referred to as “PC-1” and “PC-2” when distinguished) are connected, the image acquisition unit 31 simultaneously displays those videos on the display 3.

  The stroke processing unit 32 draws a stroke image, deletes the drawn stroke image, and edits the drawn stroke image based on the event related to the stroke drawing allocated by the event distribution unit 25.

  The UI image generation unit 33 generates a UI (user interface) image set in advance on the electronic blackboard 2. The background generation unit 34 receives, from the page processing unit 37, media data to be described later out of the page data read from the page data storage unit 300 by the page processing unit 37. The background generation unit 34 outputs the received media data to the display superimposing unit 36.

  The layout management unit 35 provides layout information indicating the layout of each image output from the image acquisition unit 31, the stroke processing unit 32, and the UI image generation unit 33 (or the background generation unit 34) to the display superimposing unit 36. I manage. Thereby, the layout management unit 35 can instruct the display superimposing unit 36 at which position in the UI image and the background image to display or hide the video and stroke image.

  Based on the layout information output from the layout management unit 35, the display superimposing unit 36 performs the layout of each image output from the image acquisition unit 31, the stroke processing unit 32, the UI image generation unit 33, and the background generation unit 34.

  The page processing unit 37 stores the stroke image data and the image captured as a video as one page data and stores them in the page data storage unit 300. Stroke image data and video data form part of page data.

  Video data displayed on the display 3 at the time when the page processing unit 37 stores the page data in the page data storage unit 300 is temporarily stored in the page data storage unit 300, and thereafter from the page data storage unit 300. When read, it is read as media data indicating a background image. Then, the page processing unit 37 outputs stroke arrangement data indicating a stroke image among the page data read from the page data storage unit 300 to the stroke processing unit 32. Further, the page processing unit 37 outputs media data indicating a background image among the page data read from the page data storage unit 300 to the background generation unit 34.

  The display superimposing unit 36 uses the layout management unit 35 to display the video from the image acquisition unit 31, the stroke image from the stroke processing unit 32, the UI image from the UI image generation unit 33, and the background image from the background generation unit 34. Superimpose according to the specified layout. Thus, the UI image, the stroke image, the video, and the background image are configured in the order in which the user can see each image even if they overlap.

<Procedure for displaying multiple images>
With reference to FIG. 5, an overall procedure for the electronic blackboard 2 to display a plurality of videos on the display 3 will be described. FIG. 5 is an example of a flowchart showing a procedure for the electronic blackboard 2 to display a plurality of videos simultaneously on the display 3. The process of FIG. 5 can be started at any timing by the user.

  First, when it is desired to display a plurality of images simultaneously, the user performs an operation of switching the electronic blackboard 2 to a plurality of image display mode by pressing a predetermined icon with the indicator 100 (S10). The operation processing unit 26 of the electronic blackboard 2 accepts this user operation.

  When the multiple video display mode is entered, the user selects a video input source indicating which video is to be displayed from among the plurality of PCs 6. The operation processing unit 26 accepts this user operation (S20). For example, the user selects one of the plurality of PCs 6. Alternatively, one of the PC 6 and the video conference terminal 7 may be selected. If only one PC 6 is connected, the video of the connected PC 6 is input without user selection. Therefore, the user selects when a plurality of PCs 6 are connected and wants to display at the same time. The multiple video display mode is different from the picture-in-picture described above. In picture-in-picture, multiple images can be displayed at the same place and only at the same size.

  Next, the user manually draws the stroke of the closing line on the display 3 with the indicator 100 because the video is displayed at the same time as another video. The coordinate detection unit 22 receives an input of the coordinates of the stroke, and the event distribution unit 25 determines that the drawing is a stroke. Further, since it is a multiple video display mode, the stroke processing unit 32 detects that the divided area 50 has been selected (S30).

  For the selected divided area 50 and outside the divided area 50 (area other than the divided area 50; hereinafter referred to as a non-divided area), the image acquisition unit 31 displays a plurality of videos selected by the user (S40). That is, the video P2 selected by the user in the divided area 50 and the video P1 in the non-divided area are displayed. In the following, the process of FIG. 5 will be described in detail.

<S10 Selection of Multiple Video Display Mode>
FIG. 6 is an example of a diagram for describing selection of the multiple video display mode. FIG. 6 shows that images P1 and P2 from two PCs 6 (hereinafter referred to as PC-1 and PC-2) are input to the electronic blackboard 2. Further, the electronic blackboard 2 displays the video P1 of the PC-1 on the display 3. An icon 301 for the user to operate as a UI image is displayed.

  When selecting the multiple video display mode, the user presses (touches) a predetermined icon 301 on the display 3 with the indicator 100. The predetermined icon 301 is referred to as a multiple video display icon 302. The operation processing unit 26 detects that the multi-image display icon 302 has been pressed, and the UI image generation unit 33 displays a predetermined UI image.

<S20 Selection of video input source>
FIG. 7 is an example of a diagram illustrating a UI image for accepting selection of a video input source. Note that FIG. 7 mainly describes differences from FIG. In FIG. 7, a selectable video input source icon 303 is displayed near the multiple video display icon 302. The video input sources are PC-1 and PC-2 that input video to the electronic blackboard 2. The external video interface 111 is prepared for each video input source, and the external video interface 111 determines whether video is input. The UI image generation unit 33 displays a video input source icon 303 corresponding to the external video interface 111 with input. Accordingly, the video input source icon 303 is a list of video inputs. The UI image generation unit 33 displays the video input source icon 303 by reducing the videos P1 and P2 or displaying the thumbnails. This makes it easier for the user to select the video P2 to be displayed in the divided area 50.

  The user selects the video input source icon 303 to be displayed on the display 3 from the displayed video input source icon 303 by pressing the indicator 100. Since the video of PC-1 is already displayed on the display 3, the user selects the video input source icon 303 corresponding to the video P2 of PC-2. Accordingly, the operation processing unit 26 detects that the selected video input source video P2 is displayed simultaneously with the currently displayed video P1. The operation processing unit 26 receives the selection of the video input source icon 303 corresponding to the PC-2, and notifies the image acquisition unit 31 that the video P2 is displayed in the divided area 50. Thereby, the image acquisition part 31 transfers to multiple video display mode. Therefore, the image acquisition unit 31 displays the images P1 and P2 of PC-1 and PC-2 simultaneously.

<S30 Detection of divided area 50>
FIG. 8 is an example of a diagram for explaining detection of the divided region 50. The UI image generation unit 33 displays a message 304 that prompts the user to select the divided area 50, such as “Please select an area”. The method for selecting the divided region 50 is a method in which the user manually writes a free block line 51 with the indicator 100. The user determines which part of the video P1 of PC-1 is to display the video P2 of PC-2 and writes the block line 51 by hand. The inner side including the blocking line 51 (which may not include the blocking line) is the divided area 50, and the video P2 of PC-2 is displayed. In other words, the area where the video P1 of PC-1 is not displayed is the divided area 50.

  The stroke processing unit 32 acquires coordinates indicating a stroke on the display 3 of the indicator 100 and receives selection of the divided region 50. When the stroke processing unit 32 in the multiple video display mode detects that the stroke forms the closed line 51, the stroke processing unit 32 receives the divided region 50. It is determined that the block line 51 is, for example, that any two coordinates constituting a stroke (between one stroke from pen-down to pen-up) substantially coincide with each other at a certain distance (or time). Is done.

  The divided area 50 may be selected as a rectangular area by specifying two diagonal points in addition to being selected by an arbitrary handwritten block line 51. Alternatively, it may be selected as a square having one side of a straight line drawn by the user (there is a mode for drawing a straight line). In addition, a rectangle having the same aspect ratio may be selected based on the length of a vertical or horizontal straight line drawn by the user by acquiring the aspect ratio of the video of PC-2.

  In FIG. 8, the divided area 50 is selected in a state where the video P1 of the PC-1 is displayed. However, in the multiple video display mode, the image acquisition unit 31 displays the video P2 of the PC-2 on the entire surface of the display 3. It may be displayed. In this case, the user can select the area to be displayed together with the video P1 of PC-1 among the video P2 of PC-2 as the divided area 50.

<S40 Display of multiple images>
First, strokes acquired by the stroke processing unit 32 will be described with reference to FIG. FIG. 9 is an example of a diagram schematically illustrating coordinates forming a stroke. The stroke is a set of coordinates that the user traces the display 3 with the indicator 100. It can be said that the indicator 100 is a locus on the display 3. Each stroke is managed by stroke arrangement data, and the coordinates of each stroke are managed by coordinate arrangement data. In FIG. 9, six coordinates (X1, Y1) to (X6, Y6) are shown. The stroke processing unit 32 draws a stroke by connecting six coordinates from pen down to pen up.

表１はストローク配列データを模式的に示す。表１に示されているように、１つのストローク配列データは、複数のストロークデータを有する。そして、１つのストロークデータ（１つのレコード又は行）は、ストロークデータを識別するためのストロークデータＩＤ、１つのストロークの書き始めの時刻を示す開始時刻、１つのストロークの書き終わりの時刻を示す終了時刻、ストロークの色、ストロークの幅、及び、ストロークの通過点の配列を識別するための座標配列データＩＤを有している。

Table 1 schematically shows stroke arrangement data. As shown in Table 1, one stroke arrangement data has a plurality of stroke data. One stroke data (one record or line) includes a stroke data ID for identifying the stroke data, a start time indicating the start time of writing one stroke, and an end indicating the end time of writing one stroke. It has a coordinate array data ID for identifying the time, stroke color, stroke width, and stroke passing point array.

表２は、座標配列データを概念的に示す。表２に示されているように、座標配列データは、ディスプレイ３上の１点（Ｘ座標値、Ｙ座標値）、この１点を通過したときのストロークの開始時刻からの差分の時刻（ΔＴ〔ｍｓ〕）、及び、この１点における発光指示体１００ａの筆圧の各情報を示している。すなわち、表２に示されている１点の集まりが、表１に示されている１つの座標配列データで示されている。例えば、ユーザが発光指示体１００ａによってアルファベット「Ｓ」を描く場合、一筆書きとなるが、「Ｓ」を描き終えるまでに、複数の通過点を通過するため、座標配列データは、これら複数の通過点の情報を示している。

Table 2 conceptually shows the coordinate array data. As shown in Table 2, the coordinate array data includes one point (X coordinate value, Y coordinate value) on the display 3, and a time difference (ΔT from the start time of the stroke when passing through this one point. [Ms]) and the writing pressure information of the light emission indicator 100a at this one point. That is, a collection of one point shown in Table 2 is represented by one coordinate array data shown in Table 1. For example, when the user draws the alphabet “S” with the light emission indicator 100a, the stroke is written in a single stroke, but passes through a plurality of passing points before drawing “S”. Point information is shown.

<< Video overlay processing >>
Next, simultaneous display of a plurality of videos will be described with reference to FIG. FIG. 10 is a diagram schematically showing the display 3 in which the video P2 of PC-2 is superimposed on the video P1 of PC-1. As shown in the drawing, the PC-2 video P2 is superimposed on the PC-1 video P1 in the divided area 50. That is, the divided area 50 of the PC-2 video P2 is trimmed and superimposed on the divided area 50 of the PC-1 video P1. Alternatively, it may be expressed that a video obtained by trimming the video P1 of the PC-1 excluding the divided area 50 and a video trimmed of the divided area 50 of the PC-2 video are synthesized.

  FIG. 11 is an example of a diagram illustrating video trimming. As illustrated in FIG. 11A, the image acquisition unit 31 acquires the video P <b> 1 of the currently displayed PC- 1 regarding the pixel position of the non-divided area outside the divided area 50. As shown in FIG. 11B, the image acquisition unit 31 acquires the video P2 of PC-2 for the pixel position inside the divided area 50 drawn by the user.

  That is, the image acquisition unit 31 maps the video of PC-1 and the video of PC-2 according to the pixel position. Accordingly, as shown in FIG. 11C, the PC-1 video P1 in which the PC-2 video P2 is superimposed on the divided area 50 can be displayed.

  FIG. 12 is an example of a flowchart illustrating a procedure in which the image acquisition unit 31 mainly displays a plurality of videos in a superimposed manner. The process of FIG. 12 starts when the multiple video display mode is selected.

  First, the stroke processing unit 32 recognizes the divided area 50 based on the block line 51 drawn by the user with the indicator 100 (S10).

  Next, the image acquisition unit 31 obtains the coordinates of the divided area 50 inside the obstruction line and creates a coordinate table (S20). An example of the coordinate table is shown in Table 3.

すなわち、座標テーブルは、分割領域５０の内側の画素位置の集合である。例えば、画像取得部３１は分割領域５０の内部に任意の点（例えば重心、中心）を設定する。そして、画素位置ごとに任意の点と結ぶ線分を作成する。この線分が閉塞線５１と交差する場合は画素位置が分割領域５０の外で、線分が閉塞線５１と交差しない場合は画素位置が分割領域５０の内であると判定できる。なお、閉塞線５１側の線分は、閉塞線５１を構成する座標から隣接する２点ずつ座標を取り出して（又は、間隔をおいて２点を取りだしてもよい）、接続することで作成される。

That is, the coordinate table is a set of pixel positions inside the divided region 50. For example, the image acquisition unit 31 sets an arbitrary point (for example, the center of gravity or the center) inside the divided region 50. Then, a line segment connecting to an arbitrary point is created for each pixel position. When this line segment intersects with the block line 51, it can be determined that the pixel position is outside the divided area 50, and when the line segment does not intersect with the block line 51, the pixel position is within the divided area 50. The line segment on the closed line 51 side is created by connecting two adjacent points from the coordinates constituting the closed line 51 (or two points may be taken at intervals) and connected. The

  Next, the process enters two loops 1 and 2. Loop 1 is repeated for all X coordinates of the pixel positions of the display 3, and loop 2 is repeated for all Y coordinates of the pixel positions of the display 3.

  The image acquisition unit 31 starts from the pixel position of X = 0 and Y = 0 of the display 3 and determines whether or not there is a pixel position in the coordinate table (S30).

  When the determination in step S30 is Yes, the image acquisition unit 31 acquires image data of the coordinates (X, Y) of the video of PC-2 (S40).

  If the determination in step S30 is No, the image acquisition unit 31 acquires image data of the coordinates (X, Y) of the video of PC-1 (S50).

  The image acquisition unit 31 increases the X coordinate one by one up to Xmax for loop 1, and executes steps S30 to S50. Xmax is the maximum value of the X coordinate of the display 3. When the X coordinate exceeds Xmax, the Y coordinate is increased by 1 to Ymax for loop 2, and steps S30 to S50 are executed. Ymax is the maximum value of the Y coordinate of the display 3.

  When the X coordinate exceeds Xmax and the Y coordinate exceeds Ymax, the image acquisition unit 31 outputs the video to the video superimposing unit 28, so that the video on which the video P1, P2 of PC-1 and PC-2 are superimposed is displayed. 3 is displayed (S60).

<Overall operation procedure>
FIG. 13 is an example of a sequence diagram showing the flow of the user operation and the overall operation of the electronic blackboard 2.

  S1: When the user wants to display a plurality of videos, the user selects the multiple video display icon 302 from the UI image icons. The operation processing unit 26 of the electronic blackboard 2 accepts selection of the multiple video display icon 302.

  S2: The image acquisition unit 31 checks the video (input source) currently input to the electronic blackboard 2.

  S3: The UI image generation unit 33 displays a list of input videos as a video input source icon 303.

  S4: The user selects a video input source to be displayed simultaneously from the list of video input source icons 303. The operation processing unit 26 of the electronic blackboard 2 accepts selection of a video input source.

  S5: When the video input source is selected, the UI image generation unit 33 displays a UI image for allowing the user to select the divided region 50.

  S6: The user draws a closed line 51 so as to surround the divided area 50 to be displayed with the indicator 100.

  S7: The stroke processing unit 32 detects the block line 51 based on the stroke.

  S8: Next, the image acquisition unit 31 creates a coordinate table of Table 3 based on the coordinates of the blocking line 51.

  S9: Also, the image acquisition unit 31 performs a process of superimposing a plurality of videos as described with reference to FIG. 12 using the coordinate table.

  S10: The display superimposing unit 36 simultaneously displays a plurality of videos P1 and P2 on the display 3.

  As described above, the electronic blackboard 2 according to the present embodiment recognizes the divided area 50 from the stroke drawn by the user and displays another video in the divided area 50, so that a plurality of videos can be displayed simultaneously. it can. Since the divided area 50 can be arbitrarily set, a plurality of videos can be simultaneously displayed in a free layout.

  In this embodiment, an electronic blackboard 2 that allows the user to select a divided area 50 of a rectangular area will be described. In the present specification, components having the same reference numerals perform the same functions, and therefore, description of components once described may be omitted or only differences may be described. The same applies to the following embodiments.

  FIG. 14 is an example of a diagram illustrating trimming by the electronic blackboard 2 and superposition of a plurality of videos. As shown in FIG. 14A, the user draws a closing line 51. When the image acquisition unit 31 according to the present embodiment detects the block line 51, the image acquisition unit 31 creates a circumscribed rectangle 52 of the block line 51 as illustrated in FIG. In this embodiment, the circumscribed rectangle 52 is the divided area 50.

  The subsequent processing is the same as in the first embodiment. That is, the image acquisition unit 31 acquires the video P1 of the PC-1 for the pixel positions of the non-divided areas outside the rectangular divided area 50, and the PC-2 for the pixel positions inside the rectangular divided areas 50. Video P2 is acquired (FIG. 14C). As a result, as shown in FIG. 14D, the PC-1 and PC-2 images can be displayed simultaneously while the PC-2 image is displayed in the rectangular divided area 50 of the display 3. it can.

  FIG. 15 is an example of a flowchart illustrating a procedure in which the image acquisition unit 31 mainly displays a plurality of videos in a superimposed manner. The process of FIG. 15 starts when the multiple video display mode is selected. First, steps S10 and S20 may be the same as steps S10 and S20 in FIG.

  Next, the image acquisition unit 31 obtains a circumscribed rectangle 52 of the blocking line 51 using the coordinate table. First, the image acquisition unit 31 detects the minimum value Xa and the maximum value Xb of the X coordinate of the circumscribed rectangle 52 from the coordinate table (S30).

  Next, the image acquisition unit 31 detects the minimum value Ya and the maximum value Yb of the Y coordinate of the circumscribed rectangle from the coordinate table (S40). The coordinates of the four corners of the rectangular divided region 50 are obtained from the minimum value Xa to the maximum value Xb of the X coordinate and the minimum value Ya to the maximum value Yb of the Y coordinate.

  Next, the process enters two loops 1 and 2. Loops 1 and 2 are the same as those in FIG.

  The image acquisition unit 31 determines whether or not each pixel position of the display 3 is included in the rectangular divided region 50, starting from the pixel position of the display 3 with X = 0 and Y = 0 (S50).

  When the determination in step S50 is Yes, the image acquisition unit 31 acquires image data of the coordinates (X, Y) of the video of PC-2 (S60).

  When the determination in step S50 is No, the image acquisition unit 31 acquires image data of the coordinates (X, Y) of the video of PC-1 (S70). The subsequent steps are the same as in FIG.

  Thus, in addition to the effects of the first embodiment, the electronic blackboard 2 of the present embodiment can display another video in the rectangular divided area 50. Even if the user does not hand-draw the rectangle, the video P2 can be displayed in the rectangular divided area 50 only by hand-writing the closing line 51.

  When the video is trimmed as in the first and second embodiments, the user cannot see the entire video P2 of the PC-2. Therefore, in this embodiment, an electronic blackboard 2 that can reduce the image P2 of the PC-2 and display it in the divided area 50 will be described.

  FIG. 16 is an example of a diagram for explaining a reduced video that is displayed superimposed on the original video. First, FIGS. 16 (a) and 16 (b) may be the same as FIGS. 14 (a) and 14 (b). On the other hand, in this embodiment, as shown in FIG. 16C, the electronic blackboard 2 reduces the video P2 of the PC-2 in consideration of the vertical and horizontal lengths of the divided areas 50. The reduced video is referred to as a reduced video P2-2. The electronic blackboard 2 displays the reduced PC-2 video P2 in the rectangular divided area 50, and displays the PC-1 video P1 in the non-divided area.

<About reduction method>
Since the user arbitrarily selects the rectangular divided area 50 by hand with the blocking line 51, the aspect ratio of the PC-2 video P2 and the rectangular divided area 50 often do not match. For this reason, it is possible to either reduce the image to include all the images in the X direction or to reduce the image to include all the images in the Y direction. The X direction may be called a width direction, a horizontal direction, and a horizontal direction, and the Y direction may be called a height direction, a vertical direction, and a vertical direction.

  FIG. 17 is an example of a diagram for explaining a reduced video P2-2 when the video is reduced so as to include all of the X direction and the Y direction. FIGS. 17A and 17B show a reduced video P2-2 that has been reduced so that all the video P2 in the X direction is included in the divided region 50, and FIGS. 17C and 17D show the video P2 in the Y direction. A reduced image P2-2 reduced so as to be included in all the divided areas 50 is shown. In FIG. 17, it is assumed that the aspect ratio (vertical / horizontal) of the divided area 50 is smaller than the aspect ratio (vertical / horizontal) of the video of PC-2.

  As shown in FIG. 17A, when the image P2 in the X direction is reduced to include all, a blank portion 310 is generated in the Y direction as shown in FIG. 17B. As shown in FIG. 17C, when the electronic blackboard 2 is reduced to include all the images in the Y direction, as shown in FIG. 17D, a protruding portion 320 is generated in the X direction of the image P2. .

  For this reason, in FIG. 17B, there is a degree of freedom as to which position on the electronic blackboard 2 the reduced video P2-2 is displayed in the vertical direction of the rectangular divided region 50, and in FIG. 17D, the reduced video P2- There is a degree of freedom in which position in the X direction of 2 the electronic blackboard 2 trims. Therefore, in this embodiment, the user makes various selections.

  If the value of the aspect ratio (vertical / horizontal) of the divided area 50 is larger than the aspect ratio (vertical / horizontal) of the video P2 of PC-2, a blank portion 310 is generated in the X direction of the rectangular divided area 50, A protruding portion 320 is generated in the Y direction. In this case, however, the content selected by the user is the same.

<< Operation procedure >>
FIG. 18 is an example of a flowchart illustrating a procedure in which the image acquisition unit 31 mainly displays a plurality of videos in a superimposed manner. First, steps S10 to S50 are the same as those in FIG. Further, the processing (S70) when it is determined No in step S50 is the same as that in FIG.

  If it is determined Yes in step S50, the image acquisition unit 31 determines whether to reduce the video P2 of the PC-2 (S60). It is assumed that the user has set the electronic blackboard 2 to reduce or not. Also, it is assumed that the user has set the electronic blackboard 2 to reduce at any of the X direction, the Y direction, or an arbitrary magnification.

  In the case of reduction based on the X direction, the X and Y coordinates, which are the pixel positions of the display 3 of interest, are reduced in order to reduce the magnification to [horizontal width of the divided area 50] / [horizontal width of the PC-2 video P2]. Conversion to pixel positions X ′ and Y ′ of video P2 of PC-2 (S80).

The coordinate system will be supplemented for the explanation of this conversion. FIG. 19 is an example of a diagram illustrating the display 3 and the divided area 50 coordinate system. In FIG. 19, the upper left corner of the display 3 is the origin (0, 0), the coordinates of the upper left corner of the divided area 50 are (X ₀ , Y ₀ ), and the coordinates in the divided area 50 are the upper left corner of the divided area 50. Is represented by coordinates (x, y) with the origin. Therefore, x = X−X ₀ and y = Y−Y ₀ . These x and y correspond to the PC-2 video P2 before reduction at a reduction ratio of [horizontal width of the divided area 50] / [horizontal width of the PC-2 video P2]. , Y) can be associated with the coordinates (X ′, Y ′) of the video P2 of the PC-2 before reduction.
X ′ = x × (horizontal width of video of PC-2) / (horizontal width of divided area 50)
= X * (Xmax) / (Xb-Xa)
Y ′ = y × (width of video of PC-2) / (width of divided area 50)
= Y * (Xmax) / (Xb-Xa)
Note that in the case of reduction based on the X direction, Y ′ may exceed the maximum value of the Y coordinate of the original video P2. When Y ′ is not included in the range of the original video P2, the image acquisition unit 31 acquires white pixels. This is the margin part 310. Since the upper left corner of the divided area 50 is the origin of the divided area 50, a blank portion 310 is generated as shown by b-1 in FIG.

When the reduction is performed based on the Y direction, (x, y) is reduced to the PC- before reduction by the following expression in order to reduce the magnification to [Vertical width of divided area 50] / [Vertical width of video P2 of PC-2]. 2 can be associated with the coordinates (X ′, Y ′) of the second video P2 (S90).
X ′ = xx × (vertical width of PC-2 video) / (vertical width of divided area 50)
= X * (Ymax) / (Yb-Ya)
Y ′ = y × (the vertical width of the video of PC-2) / (the vertical width of the divided area 50)
= Y * (Ymax) / (Yb-Ya)
With reference to the Y direction, the arrangement of the divided areas 50 with respect to the reduced image is determined as indicated by d-1 in FIG. The protruding portion 320 is not displayed.

In the case of reduction at an arbitrary magnification, (x, y) can be associated with the coordinates (X ′, Y ′) of the video P2 of the PC-2 before reduction by the following formula (S100).
X ′ = x × arbitrary magnification Y ′ = y × arbitrary magnification Further, when it is not set to reduce by the user, the image acquisition unit 31 acquires the video of the X and Y coordinates of the video P2 of the PC-2 (S110). .

  Then, the image acquisition unit 31 arranges the reduced video (X ′, Y ′ image) of PC-2 at the X, Y coordinates of the divided area 50 of interest (S120).

  Thereafter, the same processing is performed for all coordinates on the display 3 by repeating the loop 1 and the loop 2. The process of step S130 may be the same as step S80 of FIG.

<< Adjusting the reduction position >>
Adjustment in the Y direction Although the image has been reduced in the process of FIG. 18, when the image is reduced with reference to the X direction, a margin portion 310 may be generated below the rectangular divided region 50. Therefore, the image acquisition unit 31 adjusts the position of the reduced video P2-2 in the Y direction.

  FIG. 20 is an example of a diagram for explaining the adjustment of the reduction position. Note that the diagram of FIG. 20 may be executed before step S80 of FIG. For example, it may be immediately before step S80.

  First, the image acquisition unit 31 selects a reference position for aligning the reduced video P2-2 (S10). The reference position is a position serving as a reference for arranging the reduced video P2-2 in the rectangular divided area 50. The reference position includes a lower end, an upper end, a center, and an arbitrary position. If the upper end is the reference position, no adjustment is necessary. This is because the reduced video P2-2 is naturally set at the upper end of the divided area 50 in the process of FIG.

  Therefore, when the user selects the upper end as the reference position, the image acquisition unit 31 does nothing. When the user selects the lower end as the reference position, the image acquisition unit 31 matches the reduced video P2-2 with the lower end of the divided region 50 (S20). For example, the difference between the maximum value in the Y direction of the divided area 50 and the height in the Y direction of the reduced image is subtracted from all y coordinates. When the y coordinate is a negative value, since there is no image corresponding to the video P2, the margin part 310 is displayed. When the y-coordinate becomes a positive value, the reduced video P2-2 can be acquired from the beginning of Y ′ of the video P2. In this case, a blank portion 310 is generated as shown by b-3 in FIG.

  When the user selects the center as the reference position, the image acquisition unit 31 aligns the reduced video P2-2 with the center of the divided region 50 (S30). For example, half of the difference between the maximum value in the Y direction of the divided area 50 and the height in the Y direction of the reduced image is subtracted from all the y coordinates. In this case, a blank portion 310 is generated as shown by b-2 in FIG.

  When the user selects an arbitrary position as the reference position, the image acquisition unit 31 matches the reduced video P2-2 to the arbitrary position (S40). For example, the arbitrary position is subtracted from all the y coordinates (assuming the y coordinate is specified). In this way, the user can set the reduced video at an arbitrary location in the divided area 50.

-Adjustment in X direction Next, adjustment in the X direction will be described with reference to FIG. FIG. 21 is an example of an adjustment screen 401 that receives adjustments in the X direction of a reduced video. The adjustment screen 401 in FIG. 21 is displayed, for example, before step S90 in FIG. An icon for jumping to the adjustment screen 401 may be prepared on the display 3.

  The UI image generation unit 33 displays an adjustment screen 401 so that the user can adjust the reduction position. The adjustment screen 401 includes a video display unit 402, a center button 403, a left end button 404, a right end button 405, and a manual button 406.

  On the video display unit 402, the reduced video P2-2 and the divided area 50 are displayed. Since the image is reduced with reference to the Y direction, the reduced image P2-2 protrudes in the X direction. The user presses the center button 403, the left end button 404, the right end button 405, or the manual button 406 while watching the video display unit 402.

  When the left end button 404 is pressed, the image acquisition unit 31 matches the left end in the X direction of the reduced video P2-2 with the left end of the divided region 50. However, since the process is performed from the left side of the divided area 50 in step S90 in FIG. 18, the left end of the reduced image P2-2 matches the left end of the divided area 50.

  When the right end button 405 is pressed, the image acquisition unit 31 matches the right end of the reduced image P2-2 in the X direction with the right end of the divided region 50. For example, the difference between the width of the divided region 50 and the width of the reduced video P2-2 is added to the x coordinate. As a result, the protruding portion 320 can be generated on the left side when the x coordinate is raised, and can be displayed as indicated by d-3 in FIG.

  When the center button 403 is pressed, the image acquisition unit 31 matches the center of the divided area 50 with the center of the reduced video P2-2 in the X direction. For example, half of the difference between the width of the divided area 50 and the reduced video P2-2 is added to the x coordinate. Thereby, it can display as d-2 of FIG.17 (d).

  In order to adjust the reduced video P2-2 to a position other than these, the user presses the manual button 406. Since the user can set the divided region 50 at an arbitrary position using the indicator 100, the operation processing unit 26 receives the user's operation and determines the position of the divided region 50. The image acquisition unit 31 acquires this position and determines a reduced video range to be displayed in the divided area 50. For example, an arbitrary position (the position of the left end of the divided area in the x direction with respect to the reduced image P2-2) is added to the x coordinate.

<Select trimming / reducing>
The user can select whether to trim the video of PC-2 as in the first and second embodiments or to reduce the image as in the third embodiment. FIG. 22 shows an example of a selection reception screen 411 for displaying a plurality of videos. The selection reception screen 411 includes a trimming button 412 and a reduction button 413. The user presses the trimming button 412 with the indicator 100 to trim the video, and presses the reduction button 413 with the indicator 100 to reduce the video. The operation processing unit 26 accepts the user's selection and notifies the image acquisition unit 31. The image acquisition unit 31 trims or reduces the video of the PC-2 according to the setting.

  Thus, the user can arbitrarily select whether to trim or reduce the video of PC-2.

<Summary>
As described above, the electronic blackboard 2 according to the present embodiment receives the selection of the divided area 50 from the stroke drawn by the user and displays another video in the divided area 50, so that a plurality of videos can be simultaneously displayed in a free layout. can do.

<Other application examples>
The best mode for carrying out the present invention has been described above with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the scope of the present invention. And substitutions can be added.

  For example, in the present embodiment, the case where there are two images has been described. However, when three or more images are input to the electronic blackboard 2, two images can be superimposed and displayed on one image. In this case, the user selects as many divided regions 50 as the number of videos to be displayed.

  Further, the divided region 50 does not have to be delimited by a blocking line. For example, when the user divides the display 3 vertically or horizontally, the electronic blackboard 2 displays the PC-1 video P1 on one side and the PC-2 video P2 on the other side. It may be divided into three or four.

  Further, the present invention can be applied not only to the electronic blackboard 2 but also to a general information processing apparatus. In this case, if the information processing apparatus has a touch panel and can input a plurality of videos, it can be processed in the same manner as the electronic blackboard 2. Further, the display destination of the video is not limited to the display 3 and may be a projector or the like. In this case, the projector and the information processing apparatus are connected, and two or more videos are input to the information processing apparatus. The information processing apparatus accepts the setting of the divided area 50.

  In FIG. 19, the upper left corner of the display 3 or the like is the origin, but the lower left corner of the display 3 may be the origin. In this case, the lower left corner of the divided area 50 is the origin. Further, in FIG. 20, the adjustment of the y coordinate is not necessary when the user has adjusted the lower end.

  The coordinate detection unit 22 is an example of a reception unit, the stroke processing unit 32 is an example of a region selection reception unit, and the image acquisition unit 31 is an example of a video display unit. The video P1 is an example of the first video, the video P2 is an example of the second video, the UI image generation unit 33 is an example of the screen display means, and the non-divided region is an example outside the region.

2 Electronic Blackboard 3 Display 21 Video Acquisition Unit 22 Coordinate Detection Unit 24 Contact Detection Unit 26 Operation Processing Unit 31 Image Acquisition Unit 32 Stroke Processing Unit 33 UI Image Generation Unit 50 Divided Area 500 Electronic Blackboard System

JP 2014-42092 A

Claims (12)

An information processing apparatus for displaying input video on a display device,
Receiving means for receiving input of positional information of the indicator in the display device;
Area selection accepting means for accepting selection of an area in the display device based on the position information;
Video display means for displaying a first video out of the region and displaying a second video in the region among a plurality of videos;
An information processing apparatus.   The information processing apparatus according to claim 1, wherein the area selection receiving unit receives a circumscribed rectangle of a closed line detected based on a locus of the position information as the area.   The information processing apparatus according to claim 1, wherein the area selection accepting unit accepts selection of the area surrounded by a closed line detected based on a locus of the position information.   The video display means trims the second video at a pixel position corresponding to the area and displays the trimmed video on the area, and displays the first video at a pixel position outside the area outside the area. The information processing apparatus according to 2 or 3.   The information processing apparatus according to claim 1, wherein the video display unit reduces the second video and displays the second video in the area.   The video display means determines a reduction rate of the second video based on a width and a magnification of the region with respect to the second video, and reduces the width direction and the height direction of the second video by the magnification, respectively. The information processing apparatus according to claim 5.   The image display means determines a reduction rate of the second image based on a magnification of the height of the region with respect to the second image, and the width direction and the height direction of the second image are respectively determined by the magnification. The information processing apparatus according to claim 5 to be reduced.   7. The method according to claim 6, wherein when the reduction ratio of the second video is determined based on the width and magnification of the region with respect to the second video, the adjustment of the position in the height direction of the second video in the region is accepted. The information processing apparatus described.   When the reduction ratio of the second video is determined based on the magnification of the area height with respect to the second video, the adjustment of the position in the width direction of the reduced second video displayed in the area is accepted. The information processing apparatus according to claim 7.   The information processing apparatus according to claim 1, further comprising a screen display unit configured to display a selection reception screen that receives selection of whether to trim or reduce the second video. An electronic blackboard that displays input video on a display device,
Receiving means for receiving input of positional information of the indicator in the display device;
A region selection receiving means for drawing and displaying a stroke based on the position information, and receiving a selection of a region in the display device based on the position information;
Video display means for displaying a first video out of the region and displaying a second video in the region among a plurality of videos;
Electronic blackboard with An information processing device for displaying input video on a display device,
Receiving means for receiving input of positional information of the indicator in the display device;
Area selection accepting means for accepting selection of an area in the display device based on the position information;
A program for functioning as video display means for displaying a first video out of the region and displaying a second video in the region among a plurality of videos.

Images