JP2935336B2 - Graphic input / output device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphic input / output device,
In particular, the present invention relates to a graphic input / output device that inputs a sketch drawn by hand into a computer, converts the sketch into a graphic defined by geometry, and displays the graphic.

[0002]

2. Description of the Related Art Generally, graphic input to a computer is performed by:
After selecting the menu on the CRT screen or the tablet menu on the tablet, the operation is performed using an electronic pen, a digitizer, a mouse, or the like. That is, when displaying a circle on a CRT using an electronic pen and a tablet, a function for displaying the circle is selected from the menu, and the center point of the circle to be displayed using the electronic pen at a predetermined position on the tablet is selected. And data corresponding to one point on the circumference. As a result, the computer performs graphic processing and displays a circle according to the input data on the CRT. The method using the tablet menu is the same as that described above except that selection of menu functions is performed on the tablet.

[0003]

However, the method of selecting a function for graphic processing in the above-described menu is one way compared to a method in which a human draws a line or a circle directly on paper using a writing instrument. There are many steps (steps of selecting functions from menus), which are not only troublesome but also uncomfortable and difficult to use. The method of inputting data is also a method of inputting data of a specific point, and there is a sense of incongruity because the operation is different from the case of actually drawing by hand and drawing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a graphic input / output apparatus capable of inputting graphic data and displaying a graphic in a manner of drawing on paper with a writing instrument. With the goal.

[0005]

In order to achieve the above object, the invention of claim 1 comprises an electronic pen and a tablet, and input means for converting the locus of the electronic pen on the tablet into point sequence data and inputting the data. A first determining means for determining which figure in the geometry the trajectory represents based on the input point sequence data, and a display for displaying the figure determined by the first determining means on a display device Means for storing a graphic processing command for erasing a graphic element corresponding to one predetermined specific graphic and specified by overwriting; Second determining means for determining whether the figure is a figure to be drawn or an operator represented by the specific figure; and operating the operation when the second determining means determines that the figure is an operator. Is obtained by configuration includes a processing means for graphic processing, a by commands for graphic processing corresponding to the over data. The invention of claim 2 is an electronic pen and a touch panel.
The pen traces the pen's trajectory on the tablet.
Input means for converting to column data for input, and input points
Which figure in geometry is the trajectory based on the column data
A first determining means for determining whether or not the first
Display on the display device the figure determined by the determination means
Indicating means, and corresponding to one predetermined specific figure
To divide the specified graphic element by overwriting
Storage means for storing a command for graphic processing of
Whether the figure determined by the determination means 1 is a figure to be drawn
Determine if the operator is represented by a specific figure
Operating means for determining whether or not the
Respond to the operator when it is determined that the
Processing means for performing graphic processing by a graphic processing command
And is included. And of claim 3
The invention comprises an electronic pen and a tablet, on a tablet.
Input to convert the trajectory of the electronic pen into point sequence data
Means and the number of said trajectories based on the input point sequence data.
The first way to judge which figure in which science
A determining means for displaying the graphic determined by the first determining means;
Display means for displaying on the display device, and a predetermined one
Figure corresponding to a specific figure and specified by overwriting
Commands for graphic processing to delete shape elements
Corresponding and to overwrite the other one particular figure is because
Therefore, for graphic processing to divide the specified graphic element
Commands and multiple identifications by combining closed figures and arrows
The figure corresponding to each of the figures and enclosed by the closed figure is copied.
Commands for graphic processing to enlarge or reduce
The stored storage means and the first determination means
The figure is represented by the figure to be drawn or the specific figure
Second determining means for determining whether the operator is a failed operator;
When the operator is determined to be an operator by the second determination means
In response to a figure processing command corresponding to the operator,
Processing means for performing graphic processing by means of
It is.

[0006]

First, the operation of the first aspect of the present invention will be described.
You. The input means includes an electronic pen and a tablet, and converts the locus of the electronic pen on the tablet into point sequence data and inputs the data. Therefore, data of a figure drawn by drawing on a tablet using an electronic pen is converted into point sequence data and input. The first judging means judges, based on the input point sequence data, which figure in the geometry the trajectory of the electronic pen on the tablet represents. The display means causes the display device to display a graphic represented by the locus of the electronic pen based on the result of the determination by the first determination means. Therefore, even if the hand-drawn figure, that is, the trajectory of the electronic pen does not represent an accurate figure in geometry, the first determining means determines what kind of figure is represented, that is, the hand-drawn figure. It is determined which figure in the geometry the figure looks like, and the hand-drawn figure is converted to a figure defined by the geometry and displayed on the display device. Therefore, figures can be input and output without using a menu.

On the other hand, the storage means stores a command for graphic processing for deleting a graphic element corresponding to one predetermined specific graphic and designated by overwriting.
And which, second determination means determines whether the operator of figure is determined by the first determination means is represented by a graphic of figure or special should draw.

[0008] When the second judging means judges that the operator is an operator, the processing means performs figure processing by a command corresponding to a specific figure represented by the locus. Therefore, a command for graphic processing can be specified by drawing a specific graphic without using a menu. According to a second aspect of the present invention, in the storage means, a predetermined 1
Corresponding to one particular shape and specified by overlay
Commands for figure processing to divide
I remember it. According to the third aspect of the present invention, the storage means
Corresponding to one specific figure and overwrite
Therefore, for graphic processing to erase the specified graphic element
Command, and one other predetermined specific figure
Divide the specified graphic element by responding and overwriting
Command for figure processing, and closed figure and arrow
A closed figure corresponding to each of a plurality of specific figures combined
Shape to copy, enlarge or reduce the enclosed shape
The command for processing is stored.

The figure referred to in the present invention is a figure composed of a set of points, lines, planes, and the like, and includes characters, symbols, and the like.

[0010]

As described above, according to the first to third aspects of the present invention, a specific graphic is overwritten on a graphic already drawn without selecting a graphic processing function from a menu. Since the graphic processing target and the graphic processing content can be input and the graphic processing can be performed, there is an effect that a drawing based on ergonomics without a sense of incongruity can be performed.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 2 is a schematic diagram of the present embodiment. The computer 10 for graphic processing includes a CPU, a ROM and an RA.
M is provided. The computer 10 has a CRT 12,
A keyboard 14 and a tablet 16 are connected. An electronic pen 18 is connected to the tablet 16. By moving the tip of the electronic pen 18 into contact with the surface of the tablet 16 and moving it, the movement locus is converted into point sequence data and input to the computer 10. In the ROM of the computer 10, a program of a control routine for graphic processing described below and a command corresponding to a specific graphic are stored in advance. Hereinafter, this routine will be described.

When the switch of the graphic input / output device is turned on, the routine shown in FIG. 1 is started, and initialization is performed in step 30 and graphic recognition parameters are set in step 32. This parameter is
This is used to determine whether the point sequence data input from the tablet approximates a line segment, a circle, or an arc in geometry.
1, ε2, etc., and are prepared as needed. In the next step 34, it is determined whether data has been input from the tablet 16 or the keyboard 14, and when it is determined that data has been input from the keyboard, a keyboard input process is executed in step 36. This keyboard input processing will be described later with reference to FIG.

On the other hand, when it is determined in step 34 that data has been input from the tablet, a graphic recognition process is performed in step 38 as first determining means. Details of the graphic recognition processing will be described later with reference to FIG. In the next step 40 as a second determining means, it is determined whether the graphic recognized in step 38 is a graphic to be drawn or an operator represented by a specific graphic. Step 4 if the figure is to be drawn
After the automatic editing process in step 4, the graphic data is stored in step 46, and the graphic is displayed on the CRT 12 in step 48. On the other hand, when it is determined that the operator is the operator, the operator process is performed in step 50, and the graphic data after the operator process is stored in step 46, and the process proceeds to step 48. The operator processing will be described later.

Next, the graphic recognition processing in step 38 will be described with reference to FIG. First, the point sequence data input from the tablet 16 is, for example, as shown in FIG. In step 60, an equation of a straight line passing through the start point P1 and the end point P2 of the point sequence data is calculated (FIG. 6).
(2)). In the next step 62, one point P3 farthest from this straight line is selected, and in step 64, the distance d between this farthest point P3 and the straight line is calculated (FIG. 6).
(3)). Then, in step 66, the distance d is compared with the parameter ε1, and when the distance d> ε1, the farthest point P3 selected in step 62 is replaced with the start point and end point in step 68, and then the process proceeds to step 60. As a result, the point P3 becomes the end point with respect to the start point P1 and becomes the start point with respect to the end point P2. In step 60, the equation of two straight lines shown in FIG. At this time, the point P3 becomes a bending point of the traverse passing through the points P1, P3, and P2. Then, in step 62, the points P4 and P5 farthest from these straight lines are selected. If the distance between the points P4 and P5 is larger than the parameter ε1, the straight lines P1 P4 and P4
Equations P3 and P5P2 are obtained (FIG. 6)
(5)). By repeating the above steps 60, 62, 64 and 68 until the distance to the farthest point becomes equal to or less than the parameter ε1, the traverse shown in FIG. 6 (6) can be created.

In the next step 70, the perpendicular bisectors of one traverse line constituting the traverse are obtained, and the intersection of these vertical bisectors is obtained, thereby obtaining the circle or arc most similar to the traverse. The center of the provided virtual circle is calculated. In the next step 72, the equation of the virtual circle centered on the virtual center is calculated, and in step 74 the maximum value D of the distance between the virtual circle and the traverse is determined (FIG. 6).
(7)). Then, in step 76, the distance D is compared with the parameter ε2, and when D ≦ ε2, it is determined that the virtual circle and the shape of the traverse are similar, and the traverse is recognized as a circle or an arc. On the other hand, the distance D> ε2
In the case of, the traverse is not approximated to a circle and is recognized as a line segment or a traverse. Then, after the recognized figure is automatically edited, it is displayed on the CRT.

Next, the operator process will be described with reference to FIG. First, in step 100, it is determined which operator shown in the following table is the operator input from the tablet.

[0017]

[Table 1]

To explain the operator, "x" is an operator using erasure as a command and has a function of erasing a graphic element specified by overwriting as shown in FIG. “/” Is an operator that uses a cut as a command, and has a function of dividing a specified graphic element by overwriting as shown in FIG. "O" (any shape may be used as long as it is a closed figure) is an operator using a wrapper as a command and has a function of recognizing a graphic element surrounded by a closed figure. By combining this wrapper with the arrow "→", it is possible to define an operator for copying, enlarging, or reducing the command. By combining the arrow "→" with the figure recognized by the wrapper as the starting point, the figure can be defined. You get the ability to copy. Also, a function of enlarging the figure recognized by the wrapper can be obtained by combining an outward arrow "→" with the wrapper as a starting point. Then, a function of reducing the figure recognized by the wrapper can be obtained by combining the arrow “→” pointing into the wrapper with the wrapper as a starting point. These operators are shown in FIG. 7 (1), (2),
As shown in (3), it is determined whether each of the graphic elements constituting the operator is a graphic to be drawn or an operator by determining whether the length of each of the graphic elements constituting the operator is smaller than or equal to the parameters d1 and d2. Is done. The operator is recognized as an operator only when the wrapper and the arrow “→” are drawn in a short time. If it is determined in step 100 that the operator is a command to delete, the graphic element specified in step 102 is deleted from the storage unit. Also, from step 104 to step 11
At 0, the graphic processing shown in the above table is similarly performed.

FIG. 5 shows the details of step 36.
In step 112, it is determined whether or not the end function is selected from the menu displayed on the CRT. When the end function is selected, the routine shown in FIG. 1 is ended. If a function other than the end function is selected, a process corresponding to the function selected by the menu is performed in step 114. This function includes, for example, changing the size of the parameters for graphic processing described in step 32, saving, reading, erasing, hard copying, clearing all, and helping the graphic database.

Next, the automatic editing of step 44 will be described with reference to FIG.
This will be described with reference to FIG. First, as shown in FIG. 8A, an angle θ centered on the horizontal line H and the vertical line V is set as a parameter, and the line segment recognized by the figure recognition is shifted from the horizontal line H or the vertical line V by the angle θ. If the line segment exists within the range, the line segment is edited into a horizontal line H or a vertical line V.
Further, as shown in FIG. 8 (2), a region having a diameter d3 centered on the end of one line segment is determined in advance. Figure 8
Edit again as shown in (3).

In the above description, an example in which a graphic input on a CRT is displayed has been described. However, if a tablet with a display is used, the CRT can be omitted, and hand-drawing and graphic display can be performed in the same place. Can be. In the above description, an example in which line segments, circles, and arcs are recognized has been described. However, other figures such as ellipses may be recognized. In addition, as an operator, movement of a figure, drawing of a symmetric figure, drawing of a rotated figure, etc. may be defined and processed.
Further, another function such as intersection processing may be provided as an editing function.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a control routine of the present embodiment.

FIG. 2 is a block diagram showing a schematic diagram of the present embodiment;

FIG. 3 is a flowchart showing details of step 38;

FIG. 4 is a flowchart showing details of step 50;

FIG. 5 is a flowchart showing details of step 36;

FIGS. 6 (1) to (7) are diagrams for explaining a figure recognition process.

FIGS. 7 (1) to (3) are diagrams for explaining the shape of an operator.

FIGS. 8A to 8C are diagrams for explaining automatic editing of a figure.

[Explanation of symbols]

 12 CRT 16 Tablet 18 Electronic pen

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tadataka Hirose 8-21-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Store (72) Inventor Motonori Furukawa 8-21, Ginza, Chuo-ku, Tokyo No. 1 Inside Takenaka Corporation Tokyo Main Store (72) Inventor Kyoko Yoshida 8-21-1, Ginza, Chuo-ku, Tokyo Inside Tokyo Main Store (56) References JP-A-60-75980 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) G06T 1/00

Claims (3)

(57) [Claims] An input means for converting the trajectory of the electronic pen on the tablet into point sequence data for inputting the trajectory on the tablet, comprising: A first determining means for determining whether or not the image represents the image, a display means for displaying a graphic determined by the first determining means on a display device, and an overwriting corresponding to one predetermined specific graphic. Storage means for storing a graphic processing command for erasing the graphic element specified by the operator, and an operator represented by the specific graphic or the graphic to be drawn by the graphic determined by the first determining means. A second determining means for determining whether there is a graphic processing, and performing graphic processing by a graphic processing command corresponding to the operator when the second determining means determines that the operator is an operator. Processing means; and a graphic input / output device comprising: And input means for converting the trajectory of the electronic pen on the tablet into point sequence data and inputting the trajectory. The trajectory is based on the input point sequence data. A first determining means for determining whether or not the image represents the image, a display means for displaying a graphic determined by the first determining means on a display device, and an overwriting corresponding to one predetermined specific graphic. Storage means for storing a graphic processing command for dividing the graphic element specified by the first determining means; and a graphic determined by the first determining means, a graphic to be drawn or an operator represented by the specific graphic. A second determining means for determining whether there is a graphic processing, and performing graphic processing by a graphic processing command corresponding to the operator when the second determining means determines that the operator is an operator. Cormorant processing graphics output device that includes a means. 3. An input means, comprising an electronic pen and a tablet, for converting the trajectory of the electronic pen on the tablet into point sequence data and inputting the data, and, based on the input point sequence data, the trajectory of any figure in the geometry. A first determining means for determining whether or not the image represents the image, a display means for displaying a graphic determined by the first determining means on a display device, and an overwriting corresponding to one predetermined specific graphic. Command for erasing the graphic element specified by the command, and a command for graphic processing for dividing the graphic element corresponding to another predetermined specific graphic and specified by overwriting And a graphic processing command for copying, enlarging or reducing a figure corresponding to each of a plurality of specific figures obtained by combining a closed figure and an arrow and enclosing the figure surrounded by the closed figure. Means, a second determining means for determining whether the graphic determined by the first determining means is a graphic to be drawn or an operator represented by the specific graphic, and an operator which is determined by the second determining means. Processing means for performing graphic processing by a graphic processing command corresponding to the operator when it is determined that