JP4266076B2 - Electronic blackboard system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to electronic blackboard system.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known an electronic blackboard device capable of reading handwritten information written on a writing surface such as a whiteboard or a writing sheet using a writing tool with a dedicated scanner and outputting it to a recording paper with a dedicated printer. ing. On the other hand, in recent years, an electronic blackboard system has also been provided in which an information input device is arranged on the writing surface of the electronic blackboard so that information written by handwriting on the writing surface can be input to the computer in real time. ing.
[0003]
For example, a software board manufactured by Microfield Graphics, Inc. is configured by arranging information input devices on a whiteboard, and visual data such as characters and pictures written on the whiteboard. It is a device that makes it possible to import a computer into a computer in real time. In an electronic blackboard system configured using this soft board, visual data captured by the soft board is input to a computer and displayed on a CRT (Cathode Ray Tube), or displayed on a large screen using a liquid crystal projector. It is possible to output to recording paper with a printer. It is also possible to project a computer screen to which a soft board is connected onto the soft board with a liquid crystal projector and operate the computer on the soft board.
[0004]
In addition, a display device for displaying characters and images, an information input device in which a coordinate input surface (touch panel surface) is provided on the display surface of the display device, and display control of the display device based on an input from the information input device There is provided an electronic blackboard system that includes a display device and a writing surface using a display device and an information input device.
[0005]
For example, in Smart 2000 manufactured by SMART Technologies Inc., a projection surface of a panel in a state where characters, pictures, graphics, and graphics images are projected onto the panel using a liquid crystal projector connected to a computer. Using the information input device (writing surface) provided on the display surface of (display surface), a process of taking handwritten information into the computer is performed. Then, the handwritten information and the image information are synthesized in the computer and can be displayed again in real time via the liquid crystal projector.
[0006]
In such an electronic blackboard system, an image input using an information input device can be displayed as an overwritten image on an image displayed on a screen displayed by a display device, so that the conference, presentation, educational site, etc. Is widely used, and its use effect is highly evaluated. In addition, the electronic blackboard system is also used as an electronic conference system by incorporating a communication function such as voice and image into a remote communication line.
[0007]
By the way, as a method of switching colors of characters and pictures in the conventional electronic blackboard system, various operations on the display device are performed by the function of the electronic blackboard software which is application software incorporated in the control device of the electronic blackboard system. There is a technique in which a toolbar in which a plurality of buttons are arranged is displayed, and a color is switched by causing a user to operate each button assigned to the displayed toolbar. Each button assigned to the toolbar includes a pen button for each color that allows you to select a drawing mode that allows you to specify the color of characters, pictures, etc. Also included is an eraser button that allows you to select an erase mode that can be erased.
[0008]
[Problems to be solved by the invention]
However, the electronic blackboard system as described above has been positioned as a powerful tool for inputting and displaying information with the spread of personal computers, etc., but it is not perfect yet, and it is not fully implemented. There are a number of issues that still need to be resolved to make it easier.
[0009]
First, when changing the color of the drawing line,
A troublesome operation of toolbar icon → pull-down menu → dialog box is required. This operation requires basic knowledge of the electronic blackboard software. Such an electronic blackboard system is intended for use by an unspecified number of people in conference rooms, but there are many people who do not have knowledge of electronic blackboard software, in which case the color of the drawing line, etc. There is a problem that the change function of can not be used much.
[0010]
Second, if you want to erase a part that was drawn by mistake,
A troublesome operation of toolbar icon → pull-down menu → dialog box is required. To perform this operation, basic knowledge of the electronic blackboard software is required.
[0011]
Third, when drawing ruled lines (vertical lines, horizontal lines)
A troublesome operation of toolbar icon → pull-down menu → dialog box is required. To perform this operation, basic knowledge of the electronic blackboard software is required.
[0012]
Fourth, when drawing straight lines,
A troublesome operation of toolbar icon → pull-down menu → dialog box is required. To perform this operation, basic knowledge of the electronic blackboard software is required.
[0013]
Fifth, when drawing a circle,
A troublesome operation of toolbar icon → pull-down menu → dialog box is required. To perform this operation, basic knowledge of the electronic blackboard software is required.
[0014]
Sixth, even when filling and drawing
A troublesome operation of toolbar icon → pull-down menu → dialog box is required. To perform this operation, basic knowledge of the electronic blackboard software is required.
[0015]
In other words, in order to use the electronic blackboard system that uses the display device and the information input device to configure the display surface and writing surface of the electronic blackboard, even those who have knowledge of the electronic blackboard software and have never operated a personal computer. There is a disadvantage that those without knowledge of electronic blackboard software cannot be used.
[0016]
An object of the present invention is to provide an electronic blackboard system that does not require knowledge of the electronic blackboard software, can obtain the same operability as a normal blackboard, and can be used by anyone in the same way as the blackboard. .
[0017]
[Means for Solving the Problems]
An electronic blackboard system according to claim 1 is a display device having a two-dimensional information input area on a display surface, detection means for detecting a predetermined object indicating the information input area, and a specific color for each predetermined figure. Setting means for associating, color identifying means for identifying the color of the predetermined object detected by the detecting means, coordinate detecting means for detecting coordinates where the predetermined object detected by the detecting means is located, When the color of the predetermined object identified by the color identification unit is the specific color, the predetermined graphic associated with the specific color by the setting unit is detected by the coordinate detection unit. And display control means for displaying on the display surface of the display device based on the coordinates of the object .
[0020]
An electronic blackboard system according to a second aspect of the present invention is the electronic blackboard system according to the first aspect, wherein the display control unit performs ruled line drawing when the color of the predetermined object is a specific color corresponding to a ruled line drawing function. deemed to be instructed to draw a horizontal line corresponding to the coordinate position of the predetermined object detected from the position coordinates at an instruction end of said detected predetermined object instructing start by said predetermined object, or instruction A vertical line corresponding to the coordinates of the predetermined object at the end of the instruction is drawn from the coordinates of the predetermined object detected at the start.
[0021]
An electronic blackboard system according to a third aspect of the present invention is the electronic blackboard system according to the first aspect, wherein the display control means performs straight line drawing when the color of the predetermined object is a specific color corresponding to a straight line drawing function. A straight line corresponding to the coordinates of the predetermined object at the end of the instruction is drawn from the coordinates of the predetermined object detected at the start of the instruction by the predetermined object .
[0022]
An electronic blackboard system according to a fourth aspect of the present invention is the electronic blackboard system according to the first aspect, wherein the display control means performs a circle drawing when the color of the predetermined object is a specific color corresponding to a circle drawing function. deemed to be instructed, characterized in that it successively draw a circle according to the distance from the coordinates position of the predetermined object detected in the instruction beginning with the predetermined object to the nearest designated coordinates.
[0023]
An electronic blackboard system according to a fifth aspect of the present invention is the electronic blackboard system according to the first aspect, wherein the display control means performs a solid drawing when the color of the predetermined object is a specific color corresponding to a solid drawing function. If the drawing line is located at the designated position of the predetermined object, the portion surrounded by the drawing line is painted with the same color as the drawing line.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
[0025]
Here, FIG. 1 is a system configuration diagram showing the electronic blackboard system 100 of the present embodiment. As shown in FIG. 1, an electronic blackboard system 100 according to the present embodiment includes a display device 101 that is a large screen PDP (Plasma Display Panel), and a lower right portion and a lower left portion of a display surface 101 a of the display device 101. An optical method (recursive light shielding method, recursive light reflection method, recursive light shielding method having a rotational scanning system, and rotational scanning system) that detects a predetermined object O such as a pen or a finger provided on the display surface 101a of the display device 101. An information input device 104 having a coordinate detection unit 1 of a retroreflective reflection method, a camera imaging method, and the like, and a coordinate input unit 6 that detects the position coordinates of the predetermined object O detected by the coordinate detection device 1, and a predetermined object And a host PC (Personal Computer) 103 which is a control device for controlling display contents displayed on the display device 101 based on the position coordinates of O.
[0026]
First, each coordinate detection device 1 will be described. The coordinate detection device 1 forms a two-dimensional information input area 1a on the display surface 101a of the display device 101. For example, the coordinate detection device 1 detects a predetermined object O such as a pen or a finger on the display surface 101a of the display device 101. Then, the detected predetermined object O is sent to the coordinate input control device 102.
[0027]
In addition, the information input device 104 of the electronic blackboard system 100 is provided with a CCD camera 2. The CCD camera 2 photographs an object that contacts the display surface 101a of the display device 101, and performs coordinate input control on the image data. Send to device 102. Here, FIG. 2 is a longitudinal sectional side view showing the installation state of the CCD camera 2. As shown in FIG. 2, the CCD camera 2 captures an image of a predetermined object O in a hatched portion (a range of several centimeters from the display surface 101 a of the display device 101). This makes it possible to determine the color of the tip portion of the predetermined object O (or the pen tip when the predetermined object O is a pen).
[0028]
Next, the coordinate input control device 102 that sends the position coordinates of the predetermined object O detected by the coordinate detection device 1 and the pen tip color of the predetermined object O photographed by the CCD camera 2 will be described. The coordinate input control device 102 has a computer configuration including a CPU (Central Processing Unit) 3. The CPU 3 includes an RGB output unit 4, an image input unit 5, and a coordinate input unit 6 provided in the coordinate input control device 102. The host I / F unit 7 and the RGB input unit 8 are controlled. The operation of each unit controlled by the CPU 3 will be briefly described below.
[0029]
The RGB output unit 4 displays and outputs the image data input via the RGB input unit 8 on the display device 101.
[0030]
The image input unit 5 inputs image data captured by the CCD camera 2 and sets the color of the tip of the predetermined object O on the display surface 101a of the display device 101 (or the pen tip when the predetermined object O is a pen). To detect. Here, a color identification means is realized.
[0031]
The coordinate input unit 6 uses the upper left of the display surface 101a of the display device 101 as the origin (0, 0), and the predetermined object O based on the predetermined object O on the display surface 101a of the display device 101 sent from the coordinate detection device 1. The position coordinates (X, Y) are detected by the principle of triangulation, for example.
[0032]
The host I / F unit 7 is connected to the host PC 103 connected by RS232C, USB, or the like, the color of the tip of the predetermined object O (the pen tip when the predetermined object O is a pen), the position coordinates of the predetermined object O ( X, Y).
[0033]
Next, the host PC 103 connected to the coordinate input control device 102 via the host I / F unit 7 will be described. The host PC 103 includes a touch panel driver 9, an image memory 10, and a drawing control program 11. The touch panel driver 9 receives a tip portion of a predetermined object O from the coordinate input control device 102 (if the predetermined object O is a pen, a pen The previous color and the position coordinates (X, Y) of the predetermined object O are received and handed over to the drawing control program 11. The drawing control program 11 is electronic blackboard software, and executes drawing on the image memory 10 based on the input color and position coordinates (X, Y) of the predetermined object O, or Erase the drawn image.
[0034]
Here, a characteristic function executed by the drawing control program 11 of the host PC 103 will be described. Here, FIG. 3 is a front view showing a display screen of the display device 101 when the drawing control program 11 is executed. As shown in FIG. 3, when the electronic blackboard system 100 is used as an electronic blackboard, no toolbar or the like is displayed on the display surface 101 a of the display device 101, and only a so-called blackboard screen A is displayed. On such a blackboard screen A, drawing is performed by operating the attached pen, which is the predetermined object O, and an erroneous drawing portion is deleted by operating the attached blackboard eraser, which is the predetermined object O. When APL software other than the drawing control program 11 which is electronic blackboard software executed under the host PC 103 is executed, the “Control” key, “Alt” key, and “R” key are simultaneously set from a keyboard (not shown). By operating, it is possible to return to the APL startup screen provided by the OS (Operating System).
[0035]
Next, the pen function setting function realized by the drawing control program 11 will be described with reference to the pen function setting screen of FIG. The pen function setting is executed by displaying a dialog box B as shown in FIG. 4 on the display device 101 and operating this dialog box. By operating this dialog box B, the color and thickness of a pen (blackboard eraser) that performs functions other than the character drawing pen are set. Such a pen function setting is set in advance by, for example, an electronic blackboard administrator.
[0036]
Next, the drawing / erasing process based on the coordinate information in the electronic blackboard system 100 will be described with reference to the flowchart shown in FIG. 5 and the explanatory view exemplarily showing the drawing / erasing state shown in FIG.
[0037]
The coordinates (X1, Y1) shown in FIG. 6 indicate the coordinates at the start of touch (instruction) of the pen (blackboard eraser) that is the predetermined object O, and the coordinates ((X2, Y2) until it is determined that it is detached (end of instruction). ), (X3, Y3), (X4, Y4),.
[0038]
Here, (1) in FIG. 6 indicates the character drawing state, and the pen color detected based on the image data photographed by the CCD camera 2 and the thickness set for the pen of that color. Character drawing is performed by sequentially drawing straight lines between the coordinates. In this case, since the coordinate detection interval is about several millimeters, character drawing is executed according to the locus of the pen. In other words, when drawing characters, the drawing color is automatically selected according to the color of the selected pen, so the knowledge of electronic blackboard software is not required and the same operability as a normal blackboard can be obtained. It can be used in the same way as the blackboard.
[0039]
(2) in FIG. 6 shows the ruled line drawing state. The ruled line drawing is executed on condition that a color pen for the ruled line drawing pen set in the dialog box B is selected. Note that whether or not a color-drawing pen color pen has been selected is determined based on the pen color detected based on the image data captured by the CCD camera 2. Such ruled line drawing is a horizontal line connecting the X coordinates of the coordinates sequentially input with the Y coordinate of the coordinates (X1, Y1) input at the start of touching fixed, or the coordinates input at the start of touching. The color of the pen detected based on the image data photographed by the CCD camera 2 as a vertical line connecting the Y coordinates of the respective coordinates sequentially inputted with the X coordinate of (X1, Y1) fixed, and the color A ruled line is expressed by drawing with the thickness set for the pen or a predetermined color or thickness. That is, when drawing ruled lines, ruled lines can be drawn by selecting a ruled line drawing pen. Therefore, anyone can easily draw ruled lines by eliminating the feeling of computer operation by displaying a dialog box or the like.
[0040]
(3) in FIG. 6 shows a straight line drawing state. The line drawing is executed on the condition that the color pen for the line drawing pen set in the dialog box B is selected. Note that whether or not a color pen for a linear drawing pen is selected is determined based on the pen color detected based on the image data captured by the CCD camera 2. Such straight line drawing is performed based on the X coordinate and the vector direction (θ) that are input while fixing the direction of the straight line from the coordinates (X1, Y1) and the next coordinates (X2, Y2) that are input at the start of the touch. The coordinates are determined, and the pen color detected based on the image data photographed by the CCD camera 2 in sequence between the two points, the thickness set for the pen of that color, or the predetermined color or thickness It draws a straight line by drawing. FIG. 7 shows a method of calculating the vector direction (θ) and the Y coordinate when drawing a straight line. That is, when drawing a straight line, it is possible to draw a straight line by selecting a straight line drawing pen, so that anyone can easily draw a straight line by eliminating the feeling of computer operation by displaying a dialog box or the like.
[0041]
(4) in FIG. 6 shows a circle drawing state. The circle drawing is executed on condition that the color pen for the circle drawing pen set in the dialog box B is selected. Note that whether or not a color pen for the circle drawing pen has been selected is determined based on the pen color detected based on the image data captured by the CCD camera 2. In such circle drawing, the radius R (R = √ (X−X1) ² + (Y−Y1) ² ) is calculated from the coordinates (X1, Y1) input at the start of touch and the current coordinates (X, Y). Calculation, the color of the pen detected based on the image data photographed by the CCD camera 2 with the circle having the current coordinates (X, Y) as the center of the circle, the thickness set for the pen of that color, or The image is sequentially drawn in a predetermined color and thickness. Since the circle is sequentially drawn every time the designated position is changed, the old circle drawing portion is returned to the background color of the blackboard screen A every time the designated position is changed. FIG. 8 shows an example of circle drawing. In other words, since circle drawing can be performed by selecting a circle drawing pen when drawing a circle, it is possible for anyone to easily draw a circle by eliminating the feeling of computer operation by displaying a dialog box or the like.
[0042]
(5) in FIG. 6 shows the drawing partial erase state. The drawing part erasing is executed on the condition that the blackboard erasing color for the drawing part erasing set in the dialog box B is selected. Note that the determination as to whether or not the blackboard eraser of the color for erasing the drawing part has been selected is made based on the blackboard eraser color detected based on the image data photographed by the CCD camera 2. In such drawing part erasure, each coordinate is sequentially drawn with a dotted line, and if there is a drawing coordinate that matches the coordinate of the part surrounded by the dotted line (see (5) in FIG. 6), this is used as the background color of the blackboard screen A. By replacing with, the drawing is erased. The drawing coordinates are stored together with the line type, thickness, color, etc. at the time of drawing. In other words, when the drawing part is erased, the drawing is automatically erased according to the selected blackboard eraser color, so it is possible to obtain the same operability as a normal blackboard without requiring knowledge of the electronic blackboard software. However, it can be used in the same way as the blackboard.
[0043]
Although not particularly illustrated, it is also possible to execute a fill drawing by selecting a fill pen, and when there is a draw line at the designated position of the fill pen, a portion surrounded by the draw line is set as the draw line. By painting with the same color, it eliminates the feeling of computer operation by displaying a dialog box, etc., and anyone can easily perform painting.
[0044]
In the present embodiment, the present invention is applied to the information input device 104 having the optical coordinate detection device 1 that calculates the indicated position by the triangulation method, but the present invention is not limited to these methods. Needless to say, the present invention is applicable to all information input devices including, for example, an LED array method, an ultrasonic acoustic wave method, an analog capacitive coupling method, a pressure-sensitive method, and the like.
[0045]
【The invention's effect】
According to the information input device of the first aspect of the present invention, a display device having a two-dimensional information input area on the display surface, a detecting means for detecting a predetermined object indicating the information input area, and a predetermined figure Setting means for associating a specific color, color identifying means for identifying the color of the predetermined object detected by the detecting means, and coordinate detecting means for detecting coordinates where the predetermined object is detected by the detecting means And when the color of the predetermined object identified by the color identification means is the specific color, the coordinate detection means detects the predetermined graphic associated with the specific color by the setting means by providing a display control means for displaying on the display surface of the display device based on the coordinates of the predetermined object, by changing the color of a given object, switches the drawing figures in accordance with the color information Since bets it can, thereby improving the working efficiency.
[0048]
According to an electronic blackboard system of a second aspect of the present invention, in the electronic blackboard system according to the first aspect of the present invention, the display control means determines that the ruled line if the color of the predetermined object is a specific color corresponding to a ruled line drawing function. considers the drawing is instructed to draw a horizontal line corresponding to the coordinate position of the predetermined object detected from the position coordinates at an instruction end of said detected predetermined object instructing start by said predetermined object, or By drawing a vertical line corresponding to the coordinates of the predetermined object at the end of the instruction from the coordinates of the predetermined object detected at the start of the instruction, it corresponds to the ruled line drawing function at the time of ruled line drawing. Since ruled lines can be drawn by selecting a specific object of a specific color, anyone can easily draw ruled lines by eliminating the feeling of computer operation by displaying dialog boxes. Door can be.
[0049]
According to an electronic blackboard system of a third aspect of the present invention, in the electronic blackboard system according to the first aspect of the present invention, the display control means is configured such that the color of the predetermined object is a straight line when the color of the predetermined object is a specific color corresponding to a straight line drawing function. Drawing a straight line by drawing a straight line corresponding to the coordinates of the predetermined object at the end of the instruction from the coordinates of the predetermined object detected at the start of the instruction by the predetermined object. In this case, since a straight line can be drawn by selecting a predetermined object of a specific color corresponding to the straight line drawing function, it is possible for anyone to easily draw a straight line by eliminating the feeling of computer operation by displaying a dialog box or the like. it can.
[0050]
According to an electronic blackboard system of a fourth aspect of the invention, in the electronic blackboard system according to the first aspect of the invention, the display control means is configured such that when the color of the predetermined object is a specific color corresponding to a circle drawing function, It considers the drawing is designated by sequentially draw a circle according to the distance from the coordinates position of the predetermined object detected in the instruction beginning with the predetermined object to the nearest designated coordinates, when the circle drawing Since circle drawing can be performed by selecting a predetermined object of a specific color corresponding to the circle drawing function, anyone can easily draw a circle by eliminating the feeling of computer operation by displaying a dialog box or the like.
[0051]
According to the electronic blackboard system of the invention described in claim 5 , in the electronic blackboard system according to claim 1, the display control means performs painting when the color of the predetermined object is a specific color corresponding to a paint drawing function. When drawing is instructed, and there is a drawing line at the designated position of the predetermined object, the portion surrounded by the drawing line is painted with the same color as the drawing line. Since the drawing can be performed by selecting a specific object of a specific color corresponding to the filling drawing function, it eliminates the feeling of computer operation by displaying a dialog box, etc., and anyone can easily perform the drawing.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram showing an electronic blackboard system according to an embodiment of the present invention.
FIG. 2 is a longitudinal side view showing an installation state of a CCD camera.
FIG. 3 is a front view showing a display screen of the display device when a drawing control program is executed.
FIG. 4 is a front view showing a pen function setting screen.
FIG. 5 is a flowchart schematically showing a flow of drawing / erasing processing;
FIG. 6 is an explanatory diagram exemplarily showing a drawing / erasing state.
FIG. 7 is an explanatory diagram showing a method of calculating a vector direction (θ) and a Y coordinate when drawing a straight line.
FIG. 8 is an explanatory diagram showing an example of circle drawing.
[Explanation of symbols]
1a Information input area 100 Electronic blackboard system 101 Display device 101a Display surface 103 Control device 104 Information input device

Claims (5)

A display device having a two-dimensional information input area on the display surface;
Detecting means for detecting a predetermined object indicating the information input area;
Setting means for associating a specific color with each predetermined figure;
Color identifying means for identifying the color of the predetermined object detected by the detecting means;
Coordinate detection means for detecting coordinates where the predetermined object is detected by the detection means;
When the color of the predetermined object identified by the color identification unit is the specific color, the predetermined graphic associated with the specific color by the setting unit is detected by the coordinate detection unit. Display control means for displaying on the display surface of the display device based on the coordinates of the object;
An electronic blackboard system comprising: The display control means considers that ruled line drawing has been instructed when the color of the predetermined object is a specific color corresponding to the ruled line drawing function, and the position of the predetermined object detected at the start of the instruction by the predetermined object the horizontal line drawn in accordance with the coordinate position of the predetermined object detected at instruction completion from the coordinates or position of the predetermined object at instruction completion from the position coordinates of the predetermined object detected at instruction start The electronic blackboard system according to claim 1, wherein a vertical line corresponding to the coordinates is drawn. If the color of the predetermined object is a specific color corresponding to the straight line drawing function, the display control means regards that the straight line drawing is instructed, and the position of the predetermined object detected at the start of the instruction by the predetermined object The electronic blackboard system according to claim 1, wherein a straight line corresponding to the coordinates of the predetermined object at the end of the instruction is drawn from the coordinates. Wherein the display control unit, the color of the predetermined object is assumed that a circle drawn is instructed in the case of the specific color corresponding to the circle drawing function, to the position of the instruction starting at the predetermined object detected in by the predetermined object 2. The electronic blackboard system according to claim 1, wherein circles corresponding to the distance from the coordinates to the nearest designated coordinates are sequentially drawn. The display control means considers that the drawing of the predetermined object is instructed when the color of the predetermined object is a specific color corresponding to the paint drawing function, and if there is a drawing line at the designated position of the predetermined object, The electronic blackboard system according to claim 1, wherein a portion surrounded by the drawing line is painted with the same color as the drawing line.

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